Fluid node function set. More...

#include <MFnFluid.h>

Inheritance diagram for MFnFluid:

Public Types
enum	FluidMethod { kZero, kStaticGrid, kDynamicGrid, kGradient }
	Defines how voxel values are computed for most types of fluid data. More...

enum	FluidGradient { kConstant, kXGradient, kYGradient, kZGradient, kNegXGradient, kNegYGradient, kNegZGradient, kCenterGradient }
	Defines the orientation of the gradient. More...

enum	FalloffMethod { kNoFalloffGrid, kStaticFalloffGrid }
	Falloff data only supports a subset of the available fluid methods. More...

enum	ColorMethod { kUseShadingColor, kStaticColorGrid, kDynamicColorGrid }
	Color data has its own set of methods for computing voxel data. More...

enum	CoordinateMethod { kFixed, kGrid }
	Coordinate data has its own set of methods for computing voxel data. More...

Public Types inherited from MFnDagNode
enum	{ kNextPos = 0xff }
	Anonymous enum to store constant values. More...

enum	MObjectColorType { kUseDefaultColor = 0, kUseIndexColor, kUseRGBColor }
	Enum to set how an object is colored. More...

Public Types inherited from MFnDependencyNode
enum	MAttrClass { kLocalDynamicAttr = 1, kNormalAttr, kExtensionAttr, kInvalidAttr }
	Specifies the scope of the attribute. More...

enum	MdgTimerState { kTimerOff, kTimerOn, kTimerUninitialized, kTimerInvalidState }
	Possible states for the node's timer. More...

enum	MdgTimerMetric { kTimerMetric_callback, kTimerMetric_compute, kTimerMetric_dirty, kTimerMetric_draw, kTimerMetric_fetch, kTimerMetric_callbackViaAPI, kTimerMetric_callbackNotViaAPI, kTimerMetric_computeDuringCallback, kTimerMetric_computeNotDuringCallback, kTimerMetrics }
	The different timer metrics which can be queried. More...

enum	MdgTimerType { kTimerType_self, kTimerType_inclusive, kTimerType_count, kTimerTypes }
	The types of timers which can be queried. More...

Public Member Functions
virtual MFn::Type	type () const
	Function set type. More...

virtual	~MFnFluid ()
	Destructor.

	MFnFluid ()
	Default constructor.

	MFnFluid (MObject &object, MStatus *ReturnStatus=NULL)
	Constructor. More...

	MFnFluid (const MDagPath &object, MStatus *ret=NULL)
	Constructor. More...

MObject	create3D (unsigned int Xres, unsigned int Yres, unsigned int Zres, double Xdim, double Ydim, double Zdim, MObject parentOrOwner=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a fluid object from the specified data and sets this function set to operate on the new fluid object. More...

MObject	create2D (unsigned int Xres, unsigned int Yres, double Xdim, double Ydim, MObject parentOrOwner=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a fluid object from the specified data and sets this function set to operate on the new fluid object. More...

MStatus	getResolution (unsigned int &Xres, unsigned int &Yres, unsigned int &Zres) const
	Gets the resolution of the fluid. More...

MStatus	getResolution (unsigned int &Xres, unsigned int &Yres) const
	Gets the resolution of the fluid. More...

MStatus	getDimensions (double &Xdim, double &Ydim, double &Zdim) const
	Gets the dimensions of the fluid. More...

MStatus	setSize (unsigned int Xres, unsigned int Yres, unsigned int Zres, double Xdim, double Ydim, double Zdim, bool resample)
	Sets the size and resolution of the grid. More...

MStatus	setSize (unsigned int Xres, unsigned int Yres, double Xdim, double Ydim, bool resample)
	Sets the size and resolution of the grid. More...

unsigned int	gridSize (MStatus *ReturnStatus=NULL)
	Returns the number of elements in the grid. More...

MStatus	velocityGridSizes (int &xsize, int &ysize, int &zsize)
	Returns the number of elements in the velocity grids. More...

float *	falloff (MStatus *ReturnStatus=NULL)
	This method returns a pointer to the storage for the falloff data in the fluid. More...

float *	density (MStatus *ReturnStatus=NULL)
	This method returns a pointer to the storage for the density data in the fluid. More...

MStatus	getVelocity (float &Xvel, float &Yvel, float *&Zvel)
	This method returns pointers to the storage for the velocity data in the fluid. More...

float *	pressure (MStatus *ReturnStatus=NULL)
	This method returns a pointer to the storage for the pressure data in the fluid. More...

float *	temperature (MStatus *ReturnStatus=NULL)
	This method returns a pointer to the storage for the temperature data in the fluid. More...

float *	fuel (MStatus *ReturnStatus=NULL)
	This method returns a pointer to the storage for the fuel data in the fluid. More...

MStatus	getCoordinates (float &u, float &v, float *&w)
	This method returns pointers to the storage for the uvw coordinate data in the fluid. More...

MStatus	getColors (float &r, float &g, float *&b)
	This method returns pointers to the storage for the color data in the fluid. More...

MStatus	setFalloffMode (FalloffMethod mode)
	Set the modes by which the shader falloff values in the grid are determined. More...

MStatus	getFalloffMode (FalloffMethod &mode)
	Get the modes by which the falloff values in the grid are determined. More...

MStatus	setDensityMode (FluidMethod mode, FluidGradient gradient)
	Set the modes by which the density values in the grid are determined. More...

MStatus	getDensityMode (FluidMethod &mode, FluidGradient &gradient)
	Get the modes by which the density values in the grid are determined. More...

MStatus	setVelocityMode (FluidMethod mode, FluidGradient gradient)
	Set the modes by which the velocity values in the grid are determined. More...

MStatus	getVelocityMode (FluidMethod &mode, FluidGradient &gradient)
	Get the modes by which the velocity values in the grid are determined. More...

MStatus	setTemperatureMode (FluidMethod mode, FluidGradient gradient)
	Set the modes by which the temperature values in the grid are determined. More...

MStatus	getTemperatureMode (FluidMethod &mode, FluidGradient &gradient)
	Get the modes by which the temperature values in the grid are determined. More...

MStatus	setFuelMode (FluidMethod mode, FluidGradient gradient)
	Set the modes by which the fuel values in the grid are determined. More...

MStatus	getFuelMode (FluidMethod &mode, FluidGradient &gradient)
	Get the modes by which the fuel values in the grid are determined. More...

MStatus	setCoordinateMode (CoordinateMethod mode)
	Set the modes by which the UVW coordinate values in the grid are determined. More...

MStatus	getCoordinateMode (CoordinateMethod &mode)
	Get the modes by which the UVW coordinates values in the grid are determined. More...

MStatus	setColorMode (ColorMethod mode)
	Set the modes by which the color values in the grid are determined. More...

MStatus	getColorMode (ColorMethod &mode)
	Get the modes by which the color values in the grid are determined. More...

MStatus	getForceAtPoint (const MPointArray &point, const MVectorArray &velocity, const MDoubleArray &mass, MVectorArray &force, double deltaTime=1.0/24.0)
	Compute the force of the fluid as a field on an array of points, given their position, velocity, and mass. More...

MStatus	getForceAtPoint (const MVectorArray &point, const MVectorArray &velocity, const MDoubleArray &mass, MVectorArray &force, double deltaTime=1.0/24.0)
	Compute the force of a field on an array of points, given their position, velocity, and mass. More...

bool	toGridIndex (const MPoint &objectSpacePoint, int3 &gridCoords, MStatus *status=NULL)
	For the given point in object space, get the grid indices of the voxel that it happens to lie in. More...

MStatus	voxelCenterPosition (int xi, int yi, int zi, MPoint &objectSpacePoint)
	For the given voxel, get the location of the center in object space. More...

MStatus	updateGrid ()
	Tells the fluid shape that the contents of the fluid grid has changed. More...

void	emitIntoArrays (float val, int x, int y, int z, float density, float heat, float fuel, bool doColor, const MColor &emitColor)
	Use this method to add density, heat, fuel, and/or color to a particular voxel of a fluid. More...

int	index (int xi, int yi)
	This is a utility routine for finding the index of a cell in an array of fluid data. More...

int	index (int xi, int yi, int zi)
	This is a utility routine for finding the index of a cell in an array of fluid data. More...

void	index (int ai, int &xi, int &yi, int &zi)
	This is a utility routine for finding the coordinates of a cell in an array of fluid data given the index. More...

int	index (int xi, int yi, int zi, int xres, int yres, int zres)
	This is a utility routine for finding the index of a cell given the X, Y and Z resolutions. More...

void	index (int ai, int xres, int yres, int zres, int &xi, int &yi, int &zi)
	This is a utility routine for finding the coordinates of a cell given the index, and the X, Y and Z resolutions. More...

bool	isAutoResize ()
	Is this an autoresize fluid? More...

bool	isResizeToEmitter ()
	If this is an autoresize fluid, should it also resize to the emitter. More...

MStatus	expandToInclude (const MPoint &min, const MPoint &max)
	Tells the fluid shape to autoresize to include these two points This would normally be used in a fluid emitter node if the fluid had resizeToEmitter turned on. More...

	MFnFluid (const MObject &object, MStatus *ret=NULL)
	Constructor. More...

Public Member Functions inherited from MFnDagNode
virtual	~MFnDagNode ()
	Destructor. More...

	MFnDagNode ()
	Class Constructor. More...

	MFnDagNode (MObject &object, MStatus *ret=NULL)
	Not available in Python. More...

	MFnDagNode (const MDagPath &object, MStatus *ret=NULL)
	Class Constructor. More...

MObject	create (const MTypeId &typeId, MObject &parent=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a new DAG node with the given type tag. More...

MObject	create (const MTypeId &typeId, const MString &name, MObject &parent=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a new DAG node with the given type tag. More...

MObject	create (const MString &type, MObject &parent=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a new DAG node with the given type tag. More...

MObject	create (const MString &type, const MString &name, MObject &parent=MObject::kNullObj, MStatus *ReturnStatus=NULL)
	Creates a new DAG node with the given type tag. More...

unsigned int	parentCount (MStatus *ReturnStatus=NULL) const
	Determines the number of parent Nodes of the Node. More...

MObject	parent (unsigned int i, MStatus *ReturnStatus=NULL) const
	Queries the DAG Node attached to the Function Set for the parent Node corresponding to the given index. More...

MStatus	addChild (MObject &child, unsigned int index=kNextPos, bool keepExistingParents=false)
	Makes the given DAG Node a child of the DAG Node to which this instance of the Function Set is attached. More...

MStatus	removeChild (MObject &child)
	Removes the given DAG Node from the parent. More...

MStatus	removeChildAt (unsigned int index)
	Removes the child at the given index from the parent. More...

unsigned int	childCount (MStatus *ReturnStatus=NULL) const
	Determines the number of child Nodes of the Node. More...

MObject	child (unsigned int i, MStatus *ReturnStatus=NULL) const
	Queries the DAG Node attached to the Function Set for the child Node corresponding to the given index. More...

MObject	dagRoot (MStatus *ReturnStatus=NULL)
	Determines the root of the first DAG Path to the DAG Node attached to the Function Set. More...

bool	hasParent (const MObject &node, MStatus *ReturnStatus=NULL) const
	Determines whether or not the given Node is a parent of the DAG Node attached to the Function Set. More...

bool	hasChild (const MObject &node, MStatus *ReturnStatus=NULL) const
	Determines whether or not the given Node is a child of the DAG Node attached to the Function Set. More...

bool	isChildOf (const MObject &node, MStatus *ReturnStatus=NULL) const
	Determines whether or not the DAG Node attached to the Function Set is a child of the given node. More...

bool	isParentOf (const MObject &node, MStatus *ReturnStatus=NULL) const
	Determines whether or not the DAG Node attached to the Function Set is a parent of the given node. More...

bool	inUnderWorld (MStatus *ReturnStatus=NULL) const
	Determines whether or not the DAG Node is an underworld node. More...

bool	inModel (MStatus *ReturnStatus=NULL) const
	Determines whether or not the DAG Node is in the model. More...

bool	isInstanceable (MStatus *ReturnStatus=NULL) const
	Returns true if the DAG node can be instanced, and false otherwise. More...

MStatus	setInstanceable (const bool how)
	Sets whether or not the DAG node is instanceable. More...

bool	isInstanced (bool indirect=true, MStatus *ReturnStatus=NULL) const
	Determines whether the DAG Node attached to the Function Set is directly or indirectly instanced. More...

bool	isInstancedAttribute (const MObject &attr, MStatus *ReturnStatus=NULL) const
	Returns true if the specified attribute is instanced. More...

unsigned int	instanceCount (bool total, MStatus *ReturnStatus=NULL) const
	Determines the number of times the Node attached to the Function Set is instanced. More...

MObject	duplicate (bool instance=false, bool instanceLeaf=false, MStatus *ReturnStatus=NULL) const
	This method duplicates the DAG hierarchy rooted at the current node. More...

MStatus	getPath (MDagPath &path) const
	Returns a DAG Path to the DAG Node attached to the Function Set. More...

MStatus	getAllPaths (MDagPathArray &paths) const
	Determines all DAG Paths to the DAG Node attached to the Function Set. More...

MString	fullPathName (MStatus *ReturnStatus=NULL) const
	Return a string representing the full path from the root of the dag to this object. More...

MString	partialPathName (MStatus *ReturnStatus=NULL) const
	Return a string representing the partial path from the root of the dag to this object. More...

MMatrix	transformationMatrix (MStatus *ReturnStatus=NULL) const
	Returns the object space transformation matrix for this DAG node. More...

bool	isIntermediateObject (MStatus *ReturnStatus=NULL) const
	Returns true if this object is an intermediate in a geometry calculation. More...

MStatus	setIntermediateObject (bool isIntermediate)
	Sets whether this object is an intermediate in a geometry calculation. More...

int	objectColor (MStatus *ReturnStatus=NULL) const
	Deprecated in 2016.0 More...

MStatus	setObjectColor (int color)
	Sets the index for the current user defined inactive color used by the node. More...

bool	usingObjectColor (MStatus *ReturnStatus=NULL) const
	Deprecated in 2016.0 More...

MStatus	setUseObjectColor (bool useObjectColor)
	Deprecated in 2016.0 More...

MObjectColorType	objectColorType (MStatus *ReturnStatus=NULL) const
	Determines whether or not the user defined inactive color will be used for the node, or whether the default inactive color will be used. More...

MStatus	setObjectColorType (MObjectColorType type)
	Sets whether or not the user defined inactive object color will be used. More...

MStatus	setObjectColor (const MColor &color)
	Sets the color value for the current user defined inactive color used by the node. More...

MColor	objectColorRGB (MStatus *ReturnStatus=NULL) const
	Determines the RGB color for the current user defined inactive color used by the node. More...

int	objectColorIndex (MStatus *ReturnStatus=NULL) const
	Determines the index for the current user defined inactive color used by the node. More...

MColor	hiliteColor (MStatus *ReturnStatus=NULL) const
	Determines the current hilite color used by the node. More...

bool	usingHiliteColor (MStatus *ReturnStatus=NULL) const
	Determines whether or not the hilite color will be used for the node. More...

MColor	dormantColor (MStatus *ReturnStatus=NULL) const
	Determines the dormant color used by this node. More...

MColor	activeColor (MStatus *ReturnStatus=NULL) const
	Determines the active color used by this node. More...

bool	drawOverrideEnabled (MStatus *ReturnStatus=NULL) const
	Determines whether or not draw override is turned on for this node. More...

bool	drawOverrideIsReference (MStatus *ReturnStatus=NULL) const
	Determines whether or not Display Type of the draw override is Reference for this node. More...

bool	drawOverrideIsTemplate (MStatus *ReturnStatus=NULL) const
	Determines whether or not Display Type of the draw override is Template for this node. More...

bool	drawOverrideColor (MColor &color, MStatus *ReturnStatus=NULL) const
	Determines the draw override color used by this node. More...

MStatus	getConnectedSetsAndMembers (unsigned int instanceNumber, MObjectArray &sets, MObjectArray &comps, bool renderableSetsOnly) const
	Returns all the sets connected to the specified instance of this DAG object. More...

MBoundingBox	boundingBox (MStatus *ReturnStatus=NULL) const
	Returns the bounding box for the dag node in object space. More...

MDagPath	dagPath (MStatus *ReturnStatus=NULL) const
	Returns the DagPath to which the Function Set is attached. More...

virtual MStatus	setObject (const MDagPath &path)
	Attaches Function Set to the DAG Node that has the given DAG Path. More...

MStatus	setObject (MObject &object) override
	Attaches Function Set to given DAG Node. More...

MObject	model (MStatus *ReturnStatus=NULL) const
	Deprecated in 2016.0 More...

	MFnDagNode (const MObject &object, MStatus *ret=NULL)
	No script support. More...

MStatus	setObject (const MObject &object) override
	No script support. More...

Public Member Functions inherited from MFnDependencyNode
virtual	~MFnDependencyNode ()
	Destructor.

	MFnDependencyNode ()
	Default constructor.

	MFnDependencyNode (MObject &object, MStatus *ReturnStatus=NULL)
	Constructor. More...

MObject	create (const MTypeId &typeId, MStatus *ReturnStatus=NULL)
	Creates a new dependency node with the given type tag. More...

MObject	create (const MTypeId &typeId, const MString &name, MStatus *ReturnStatus=NULL)
	Creates a new dependency node with the given type tag. More...

MObject	create (const MString &type, MStatus *ReturnStatus=NULL)
	Creates a new dependency node with the given type. More...

MObject	create (const MString &type, const MString &name, MStatus *ReturnStatus=NULL)
	Creates a new dependency node with the given type. More...

MTypeId	typeId (MStatus *ReturnStatus=NULL) const
	Returns the type id of this node. More...

MString	typeName (MStatus *ReturnStatus=NULL) const
	Returns the type name of this node. More...

MString	name (MStatus *ReturnStatus=NULL) const
	Returns the name of this node. More...

MString	absoluteName (MStatus *ReturnStatus=NULL) const
	Returns the absolute name of this node. More...

MString	uniqueName (MStatus *ReturnStatus=NULL) const
	Introduced in 2023.0 More...

MString	pluginName (MStatus *ReturnStatus=NULL) const
	Returns the name of the plug-in this MFnDependendencyNode was defined in. More...

MString	setName (const MString &name, bool createNamespace=false, MStatus *ReturnStatus=NULL)
	Sets the name of this node. More...

MUuid	uuid (MStatus *ReturnStatus=NULL) const
	Returns the node's UUID. More...

void	setUuid (const MUuid &uuid, MStatus *ReturnStatus=NULL)
	Sets the node's UUID. More...

MStatus	getConnections (MPlugArray &array) const
	Get all of the current connections to this node as an array of plugs. More...

unsigned int	attributeCount (MStatus *ReturnStatus=NULL) const
	Returns the number of attributes that this node has. More...

MObject	attribute (unsigned int index, MStatus *ReturnStatus=NULL) const
	Finds the attribute of this node at the given index. More...

MObject	reorderedAttribute (unsigned int index, MStatus *ReturnStatus=NULL) const
	Some nodes, such as the various animCurve nodes, require that their attributes be set in a specific order for proper operation. More...

MObject	attribute (const MString &attrName, MStatus *ReturnStatus=NULL) const
	Finds the attribute of this node that has the given name. More...

MAttrClass	attributeClass (const MObject &attr, MStatus *ReturnStatus=NULL) const
	Returns the class (normal, dynamic, extension) of the specified attribute. More...

MStatus	getAffectedAttributes (const MObject &attr, MObjectArray &affectedAttributes) const
	Returns an array of attributes that are affected by the attribute passed in. More...

MStatus	getAffectedByAttributes (const MObject &attr, MObjectArray &affectedByAttributes) const
	Returns an array of attributes that affect the attribute passed in, attr. More...

MPlug	findPlug (const MObject &attr, bool wantNetworkedPlug, MStatus *ReturnStatus=NULL) const
	Attempt to find a plug for the given attribute. More...

MPlug	findPlug (const MString &attrName, bool wantNetworkedPlug, MStatus *ReturnStatus=NULL) const
	Attempt to find a plug for the given attribute. More...

MPlug	findPlug (const MObject &attr, MStatus *ReturnStatus=NULL) const
	Deprecated in 2019.0 More...

MPlug	findPlug (const MString &attrName, MStatus *ReturnStatus=NULL) const
	Deprecated in 2019.0 More...

MStatus	addAttribute (const MObject &attr)
	Add a new dynamic attibute to this node. More...

MStatus	removeAttribute (const MObject &attr)
	Remove a dynamic attribute from a node. More...

MPxNode *	userNode (MStatus *ReturnStatus=NULL) const
	If the function set's node is a plug-in node, then this method will extract the MPxNode pointer from it. More...

bool	isFromReferencedFile (MStatus *ReturnStatus=NULL) const
	Indicates whether or not this node came from a referenced file. More...

bool	isShared (MStatus *ReturnStatus=NULL) const
	Indicates whether or not this node is shared. More...

bool	isTrackingEdits (MStatus *ReturnStatus=NULL) const
	Returns whether or not edits on the given node are being tracked by the generalized edit system. More...

bool	hasUniqueName (MStatus *ReturnStatus=NULL) const
	Indicates whether or not this node's name is unique within the scene. More...

MString	parentNamespace (MStatus *ReturnStatus=NULL) const
	Returns the name of the namespace in which this node resides. More...

bool	isLocked (MStatus *ReturnStatus=NULL) const
	Indicates whether or not this node is locked. More...

MStatus	setLocked (bool locked)
	Locks or unlocks this node. More...

bool	isNewAttribute (const MObject &attr, MStatus *ReturnStatus=NULL) const
	Indicates whether or not the specified attribute was added to this node within the current scene. More...

MStatus	setFlag (unsigned int flag, bool state)
	Sets the state of the specified flag for the node. More...

bool	isFlagSet (unsigned int flag, MStatus *ReturnStatus=NULL) const
	Retrieves the current state of the specified flag for a node. More...

bool	isDefaultNode (MStatus *ReturnStatus=NULL) const
	Returns true if the node is a default node. More...

MStatus	setDoNotWrite (bool flag)
	Use this method to mark the "do not write" state of this node. More...

bool	canBeWritten (MStatus *ReturnStatus=NULL) const
	Returns the do not write state of the node. More...

bool	hasAttribute (const MString &name, MStatus *ReturnStatus=NULL) const
	Returns true if the node already has an attribute with the given name. More...

MObject	getAliasAttr (bool force, MStatus *ReturnStatus=NULL)
	Returns the node's alias attribute, which is a special attribute used to store information about the node's attribute aliases. More...

bool	setAlias (const MString &alias, const MString &name, const MPlug &plug, bool add=true, MStatus *ReturnStatus=NULL)
	Sets or removes an alias (i.e. More...

bool	findAlias (const MString &alias, MObject &attrObj, MStatus *ReturnStatus=NULL) const
	Retrieves the attribute with the given alias. More...

bool	getAliasList (MStringArray &strArray, MStatus *ReturnStatus=NULL)
	Returns a list of all attribute aliases for this node. More...

MString	plugsAlias (const MPlug &plug, MStatus *ReturnStatus=NULL)
	Returns the alias for the plug's attribute or the empty string if that attribute has no alias. More...

MStatus	setIcon (const MString &filename)
	Associates a custom icon with the node for display in the Maya UI. More...

MString	icon (MStatus *ReturnStatus=NULL) const
	Returns the custom icon filename associated with the node. More...

MStatus	getExternalContent (MExternalContentInfoTable &table) const
	Returns the external content (files) that this node depends on. More...

MStatus	addExternalContentForFileAttr (MExternalContentInfoTable &table, const MObject &attr) const
	Adds content info to the specified table from a file path attribute. More...

MStatus	setExternalContentForFileAttr (const MObject &attr, const MExternalContentLocationTable &table)
	Sets content info in the specified attribute from the table. More...

MStatus	setExternalContent (const MExternalContentLocationTable &table)
	Changes the location of external content. More...

bool	affectsAnimation (MStatus *ReturnStatus=NULL) const
	Introduced in 2019.0 More...

MStatus	setAffectsAnimation ()
	Introduced in 2019.0 More...

MString	setName (const MString &name, MStatus *ReturnStatus)
	Deprecated in 2019.0 More...

	MFnDependencyNode (const MObject &object, MStatus *ReturnStatus=NULL)
	Not available in Python. More...

bool	getPlugsAlias (const MPlug &plug, MString &aliasName, MStatus *ReturnStatus=NULL)
	Not available in Python. More...

virtual const adsk::Data::Associations *	metadata (MStatus *ReturnStatus=NULL) const
	Not available in Python. More...

virtual MStatus	setMetadata (const adsk::Data::Associations &)
	Not available in Python. More...

virtual MStatus	deleteMetadata ()
	Not available in Python. More...

virtual MStatus	validateMetadata (MString &errors) const
	Not available in Python. More...

MStatus	dgTimerOn ()
	Indicates that this node should collect DG timing data whenever DG timing is enabled. More...

MStatus	dgTimerOff ()
	Indicates that this node should no longer collect DG timing data when DG timing is enabled. More...

MdgTimerState	dgTimerQueryState (MStatus *ReturnStatus=NULL)
	The function returns the current on/off state of the node's timer. More...

MStatus	dgTimerReset ()
	The function resets the dependency graph timers and counters for this node to zero. More...

double	dgTimer (const MdgTimerMetric timerMetric, const MdgTimerType timerType, MStatus *ReturnStatus=NULL) const
	The function returns the specified timer value for the current node. More...

MStatus	dgCallbacks (const MdgTimerType type, MStringArray &callbackName, MDoubleArray &value)
	Node callbacks that occur when timing is enabled get logged with the node and can be queried via this method. More...

MStatus	dgCallbackIds (const MdgTimerType type, const MString &callbackName, MCallbackIdArray &callbackId, MDoubleArray &value)
	This method provides a further breakdown of the per-callback time returned via dgCallbacks() by returning the data on a per-callbackId basis. More...

MStatus	addAttribute (const MObject &attr, MAttrClass type)
	Deprecated in 2019.0 More...

MStatus	removeAttribute (const MObject &attr, MAttrClass type)
	Deprecated in 2019.0 More...

Public Member Functions inherited from MFnBase
virtual	~MFnBase ()
	Class Destructor. More...

bool	hasObj (MFn::Type) const
	Determines whether or not the Function Set is compatible with the specified Maya Object within the API RTTI system. More...

bool	hasObj (const MObject &) const
	Determines whether or not the Function Set is compatible with the specified Maya Object within the API RTTI system. More...

MObject	object (MStatus *ReturnStatus=nullptr) const
	Returns the MObject that is attached to the Function Set. More...

Static Public Member Functions
static const char *	className ()
	Returns the name of this class. More...

Static Public Member Functions inherited from MFnDagNode
static const char *	className ()
	Returns the name of this class. More...

Static Public Member Functions inherited from MFnDependencyNode
static const char *	className ()
	Returns the name of this class. More...

static MString	classification (const MString &nodeTypeName)
	Retrieves the classification string for a node type. More...

static unsigned int	allocateFlag (const MString pluginName, MStatus *ReturnStatus=NULL)
	Allocates a node flag for sole use by the caller. More...

static MStatus	deallocateFlag (const MString pluginName, unsigned int flag)
	Deallocates a node flag which was previously allocated by a call to allocateFlag. More...

static MStatus	deallocateAllFlags (const MString pluginName)
	Deallocates all of the node flags which are currently allocated to the specified plugin. More...

static void	enableDGTiming (bool enable)
	Globally enables or disables the DG node timing mechanism. More...

Static Public Member Functions inherited from MFnBase
static const char *	className ()
	Returns the name of this class. More...

static const char *	typeString (MFn::Type)
	Introduced in 2020.0 More...

static bool	isValid (MFn::Type)
	Introduced in 2020.0 More...

Detailed Description

Fluid node function set.

This is the function set for fluid objects.

A fluid object is a node in the dependency graph that contains a grid which is made up of cells. Each cell has a variety of values assigned to it such as density, velocity, temperature, and color. The grid may be 2D or 3D. See the methods below for full details.

Fluid objects may be used for simulation purposes. This function set allows read and write access to the values in the cells of the fluid object.

Examples:: fluidInfoCmd/fluidInfoCmd.cpp, simpleFluidEmitter/simpleFluidEmitter.cpp, and simpleFluidEmitter/simpleFluidEmitter.h.

Member Enumeration Documentation

enum FluidMethod

Defines how voxel values are computed for most types of fluid data.

Enumerator
kZero	All values in grid are zero.
kStaticGrid	Values in the grid are static.
kDynamicGrid	Values in the grid come from a dynamic solver.
kGradient	Ramps the value based on the gradient setting.

enum FluidGradient

Defines the orientation of the gradient.

Enumerator
kConstant	Value is set to one across the volume.
kXGradient	Ramp the value from zero to one along the X axis.
kYGradient	Ramp the value from zero to one along the Y axis.
kZGradient	Ramp the value from zero to one along the Z axis.
kNegXGradient	Ramp the value from one to zero along the X axis.
kNegYGradient	Ramp the value from one to zero along the Y axis.
kNegZGradient	Ramp the value from one to zero along the Z axis.
kCenterGradient	Ramps the value from one at the center to zero at the edges.

enum FalloffMethod

Falloff data only supports a subset of the available fluid methods.

Enumerator
kNoFalloffGrid	No falloff grid should be defined.
kStaticFalloffGrid	Values in the falloff grid are static.

enum ColorMethod

Color data has its own set of methods for computing voxel data.

Enumerator
kUseShadingColor	Off, use shading color instead.
kStaticColorGrid	Values in the grid are static.
kDynamicColorGrid	Values in the grid come from a dynamic solver.

enum CoordinateMethod

Coordinate data has its own set of methods for computing voxel data.

Enumerator
kFixed	Values are equal the object space coordinates.
kGrid	Coordinate values will be moved using the current density solver.

Constructor & Destructor Documentation

MFnFluid	(	MObject &	object,
		MStatus *	ReturnStatus = `NULL`
	)

Constructor.

Class constructor that initializes the function set to the given MObject.

Parameters

[in]	object	The MObject to attach the function set to
[out]	ReturnStatus	the return status

Status Codes:

MS::kSuccess if the function set is successfully attached
MS::kInvalidParameter if the MObject does not represent a valid Maya object or if the function set is not allowed to attach to this MObject

MFnFluid	(	const MDagPath &	object,
		MStatus *	ReturnStatus = `NULL`
	)

Constructor.

Class constructor that initializes the function set to the given constant MDagPath object.

Parameters

[in]	object	The const MDagPath to attach the function set to
[out]	ReturnStatus	The return status

Status Codes:

MS::kSuccess if the function set is successfully attached
MS::kInvalidParameter if the MObject does not represent a valid Maya object or if the function set is not allowed to attach to this MObject

MFnFluid	(	const MObject &	object,
		MStatus *	ReturnStatus = `NULL`
	)

Constructor.

Class constructor that initializes the function set to the given MObject.

Parameters

[in]	object	The MObject to attach the function set to
[out]	ReturnStatus	the return status

Status Codes:

MS::kSuccess if the function set is successfully attached
MS::kInvalidParameter if the MObject does not represent a valid Maya object or if the function set is not allowed to attach to this MObject

Member Function Documentation

MFn::Type type ( ) const

virtual

Function set type.

Return the class type : MFn::kFluid.

Returns: the class type.

Reimplemented from MFnDagNode.

OPENMAYA_MAJOR_NAMESPACE_OPEN const char * className ( )

static

Returns the name of this class.

Return the class name : "MFnFluid".

Returns: Name of this class.

MObject create3D	(	unsigned int	Xres,
		unsigned int	Yres,
		unsigned int	Zres,
		double	Xdim,
		double	Ydim,
		double	Zdim,
		MObject	parent = `MObject::kNullObj`,
		MStatus *	ReturnStatus = `NULL`
	)

Creates a fluid object from the specified data and sets this function set to operate on the new fluid object.

The parent argument is used to specify the DAG parent of the new fluid. If parent is NULL then a new transform will be created and returned which will be the parent for the new fluid shape. The new transform will be added to the DAG.

If parent is a DAG node then the new fluid will be returned and the parent passed in will become the new node's parent.

Parameters

[in]	Xres	number of fluid grid cells in the x dimension
[in]	Yres	number of fluid grid cells in the y dimension
[in]	Zres	number of fluid grid cells in the z dimension
[in]	Xdim	object space size in the x dimension
[in]	Ydim	object space size in the y dimension
[in]	Zdim	object space size in the z dimension
[in]	parent	specifies what to do with the new fluid object. If a DAG object or NULL is given then a transform will be created for the new fluid shape and placed under the specified (optional)parent.
[out]	ReturnStatus	Status code

Returns

If parent is NULL then the transform for this fluid shape is returned
If parent is a DAG object then the new fluid shape is returned

Status Codes:

MS::kSuccess The method was successful.
MS::kValueOutOfRange A grid cell resolution or dimension parameter is invalid.
MS::kFailure An object error has occurred.

MObject create2D	(	unsigned int	Xres,
		unsigned int	Yres,
		double	Xdim,
		double	Ydim,
		MObject	parent = `MObject::kNullObj`,
		MStatus *	ReturnStatus = `NULL`
	)

Creates a fluid object from the specified data and sets this function set to operate on the new fluid object.

The parent argument is used to specify the DAG parent of the new fluid. If parent is NULL then a new transform will be created and returned which will be the parent for the new fluid shape. The new transform will be added to the DAG.

If parent is a DAG node then the new fluid will be returned and the parent passed in will become the new node's parent.

Parameters

[in]	Xres	number of fluid grid cells in the x dimension
[in]	Yres	number of fluid grid cells in the y dimension
[in]	Xdim	object space size in the x dimension
[in]	Ydim	object space size in the y dimension
[in]	parent	specifies what to do with the new fluid object. If a DAG object or NULL is given then a transform will be created for the new fluid shape and placed under the specified (optional)parent.
[out]	ReturnStatus	Status code

Returns

If parent is NULL then the transform for this fluid shape is returned
If parent is a DAG object then the new fluid shape is returned

Status Codes:

MS::kSuccess The method was successful.
MS::kValueOutOfRange A grid cell resolution or dimension parameter is invalid.
MS::kFailure An object error has occurred.

MStatus getResolution	(	unsigned int &	Xres,
		unsigned int &	Yres,
		unsigned int &	Zres
	)		const

Gets the resolution of the fluid.

The resolution gives the number of cells in the fluid grid in each direction.

Parameters

[out]	Xres	storage for returning the number of fluid grid cells in the x dimension
[out]	Yres	storage for returning the number of fluid grid cells in the y dimension
[out]	Zres	storage for returning the number of fluid grid cells in the z dimension

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

Examples:: simpleFluidEmitter/simpleFluidEmitter.cpp.

MStatus getResolution	(	unsigned int &	Xres,
		unsigned int &	Yres
	)		const

Gets the resolution of the fluid.

The resolution gives the number of cells in the fluid grid in each direction.

Parameters

[out]	Xres	storage for returning the number of fluid grid cells in the x dimension
[out]	Yres	storage for returning the number of fluid grid cells in the y dimension

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus getDimensions	(	double &	Xdim,
		double &	Ydim,
		double &	Zdim
	)		const

Gets the dimensions of the fluid.

The dimensions give the object space size of the fluid object in each direction.

Parameters

[out]	Xdim	storage for returning the dimension of the fluid in x
[out]	Ydim	storage for returning the dimension of the fluid in y
[out]	Zdim	storage for returning the dimension of the fluid in z

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

Examples:: simpleFluidEmitter/simpleFluidEmitter.cpp.

MStatus setSize	(	unsigned int	Xres,
		unsigned int	Yres,
		unsigned int	Zres,
		double	Xdim,
		double	Ydim,
		double	Zdim,
		bool	resample
	)

Sets the size and resolution of the grid.

The resolution parameters control the number of cells in the fluid grid and the dimension parameters set the size of the fluid shape in object space.

Parameters

[in]	Xres	number of fluid grid cells in the x dimension
[in]	Yres	number of fluid grid cells in the y dimension
[in]	Zres	number of fluid grid cells in the z dimension
[in]	Xdim	object space size in the x dimension
[in]	Ydim	object space size in the y dimension
[in]	Zdim	object space size in the z dimension
[in]	resample	true if the previous contents of the grid should be scaled to fit the new size by resampling the previous data at the new resolution

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kValueOutOfRange A grid cell resolution or dimension parameter is invalid.
MS::kFailure An object error has occurred. This can occur if this is called on a 2D fluid

MStatus setSize	(	unsigned int	Xres,
		unsigned int	Yres,
		double	Xdim,
		double	Ydim,
		bool	resample
	)

Sets the size and resolution of the grid.

The resolution parameters control the number of cells in the fluid grid and the dimension parameters set the size of the fluid shape in object space.

Parameters

[in]	Xres	number of fluid grid cells in the x dimension
[in]	Yres	number of fluid grid cells in the y dimension
[in]	Xdim	object space size in the x dimension
[in]	Ydim	object space size in the y dimension
[in]	resample	true if the previous contents of the grid should be scaled to fit the new size by resampling the previous data at the new resolution

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kValueOutOfRange A grid cell resolution or dimension parameter is invalid.
MS::kFailure An object error has occurred. This can occur if this is called on a 2D fluid

unsigned int gridSize ( MStatus * ReturnStatus = NULL )

Returns the number of elements in the grid.

This is equal to (x resolution * y resolution * z resolution). This routine is provided as a convenience to be used with the methods that give direct access to the fluid data. This gives the upper bound on the arrays. This size applies to all grids except for the 3 velocity grids.

Parameters

[out] ReturnStatus Status code.

Returns: The number of elements.

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus velocityGridSizes	(	int &	xsize,
		int &	ysize,
		int &	zsize
	)

Returns the number of elements in the velocity grids.

X velocity size = (x resolution+1 * y resolution * z resolution). Y velocity size = (x resolution * y resolution+1 * z resolution). Z velocity size = (x resolution * y resolution * z resolution+1).

This routine is provided as a convenience to be used with the methods that give direct access to the velocity grids.

Parameters

[out]	xsize	storage for the x velocity grid size
[out]	ysize	storage for the y velocity grid size
[out]	zsize	storage for the z velocity grid size

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.

float * falloff ( MStatus * ReturnStatus = NULL )

This method returns a pointer to the storage for the falloff data in the fluid.

The size of this array can be obtained using the "gridSize" call.

The returned pointer points to an array of float values, each one representing the falloff value in a cell of the fluid grid. To get the array index corresponding to a cell index (x,y,z), use the "index" helper method.

If you modify the data via the pointer returned, you must call the "updateGrid" call or you will not see your changes.

Values from the falloff grid are used when the fluid's Falloff Shape attribute is set to "Grid". This mode allows users to specify arbitrary falloff values between 0 and 1 at each grid cell. At render time, the shaded opacity values of the fluid will be multiplied by the interpolated falloff grid value raised to the power of 1/(1-ed), where "ed" is the value of the fluid's "edgeDropoff" attribute. When edgeDropoff=0, the opacity multiplier is 1, and when edgeDropoff is 1, the opacity multiplier is 0. Assuming that falloff grid values are in the range [0,1], raising the edge dropoff value from 0 to 1 will cause the fluid opacity to smoothly fall off towards complete transparency.

Parameters

[out] ReturnStatus Status code

Returns: Pointer to the float data of the grid

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred. This may occur if the fluid's falloff mode is set to kNone

Examples:: simpleFluidEmitter/simpleFluidEmitter.cpp.

float * density ( MStatus * ReturnStatus = NULL )

This method returns a pointer to the storage for the density data in the fluid.

The size of this array can be obtained using the "gridSize" call.

The pointer returned points to an array of float values, each one representing the density value in a cell of the fluid grid. To get the index of in the array for a cell at a given (x, y, z) use the "index" helper method.

If you modify the data via the pointer returned, you must call the "updateGrid" call or you will not see your changes.

Parameters

[out] ReturnStatus Status code

Returns: Pointer to the density data of the grid

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred. This may occur if the fluid's density mode is set to kNone

MStatus getVelocity	(	float *&	Xvel,
		float *&	Yvel,
		float *&	Zvel
	)

This method returns pointers to the storage for the velocity data in the fluid.

The size of these arrays can be obtained using the "velocityGridSizes" call.

Each of the pointers returned points to an array of float values, each value representing the velocity in a cell of the fluid grid . The three arrays contain the x components, y components, and z components of the velocity respectively.

The grid sizes are different for each of the velocity grids. The Xvel grid is one larger in X, the Yvel in Y, the Zvel in Z. This is because the velocity components are stored at the voxel face centers, not at the voxel centers. The index methods that specify the resolutions explicitly should be used for the velocity grids.

If you modify the data via the pointers returned, you must call the "updateGrid" call or you will not see your changes.

Parameters

[out]	Xvel	storage for returning a pointer to the x components of the velocity values in the grid
[out]	Yvel	storage for returning a pointer to the y components of the velocity values in the grid
[out]	Zvel	storage for returning a pointer to the z components of the velocity values in the grid

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred. This may occur if the fluid's velocity mode is set to kNone

float * pressure ( MStatus * ReturnStatus = NULL )

This method returns a pointer to the storage for the pressure data in the fluid.

The size of this array can be obtained using the "gridSize" call. Note that the pressure data only exists if the velocity method is kStaticGrid or kDynamicGrid

The pointer returned points to an array of float values, each one representing the pressure value in a cell of the fluid grid. To get the index of in the array for a cell at a given (x, y, z) use the "index" helper method.

If you modify the data via the pointer returned, you must call the "updateGrid" call or you will not see your changes. Note that the pressure data is an output of the velocity calculation. if you modify the pressure grid and the velocity grid is dynamic, your changes will be replaced after the next fluid evaluation.

Parameters

[out] ReturnStatus Status code

Returns: Pointer to the pressure data of the grid

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred. This may occur if the fluid's velocity mode is set to kNone or kGradient

float * temperature ( MStatus * ReturnStatus = NULL )

This method returns a pointer to the storage for the temperature data in the fluid.

The size of this array can be obtained using the "gridSize" call.

The pointer returned points to an array of float values, each one representing the temperature value in a cell of the fluid grid. To get the index of in the array for a cell at a given (x, y, z) use the "index" helper method.

If you modify the data via the pointer returned, you must call the "updateGrid" call or you will not see your changes.

Parameters

[out] ReturnStatus Status code

Returns: Pointer to the temperature data of the grid

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred. This may occur if the fluid's temperature mode is set to kNone

float * fuel ( MStatus * ReturnStatus = NULL )

This method returns a pointer to the storage for the fuel data in the fluid.

The size of this array can be obtained using the "gridSize" call.

The pointer returned points to an array of float values, each one representing the fuel value in a cell of the fluid grid. To get the index of in the array for a cell at a given (x, y, z) use the "index" helper method.

If you modify the data via the pointer returned, you must call the "updateGrid" call or you will not see your changes.

Parameters

[out] ReturnStatus Status code

Returns: Pointer to the fuel data of the grid

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred. This may occur if the fluid's fuel method is set to kNone

MStatus getCoordinates	(	float *&	u,
		float *&	v,
		float *&	w
	)

This method returns pointers to the storage for the uvw coordinate data in the fluid.

The size of these arrays can be obtained using the "gridSize" call. The uvw values supply the 3D texture mapping coordinates for each cell.

Each of the pointers returned points to an array of float values, each value representing the u, v, or w value in a cell of the fluid grid. To get the index of in the array for a cell at a given (x, y, z) use the "index" helper method. The three arrays contain the u values, v values, and w values of the texture coordinates respectively.

For a 2D fluid, a NULL pointer will be returned for the w array.

If you modify the data via the pointers returned, you must call the "updateGrid" call or you will not see your changes.

Parameters

[out]	u	storage for returning a pointer to the u values in the grid
[out]	v	storage for returning a pointer to the v values in the grid
[out]	w	storage for returning a pointer to the w values in the grid

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus getColors	(	float *&	r,
		float *&	g,
		float *&	b
	)

This method returns pointers to the storage for the color data in the fluid.

The size of these arrays can be obtained using the "gridSize" call.

Each of the pointers returned points to an array of float values, each value representing the color in a cell of the fluid grid. To get the index of in the array for a cell at a given (x, y, z) use the "index" helper method. The three arrays contain the r components, g components, and b components of the color respectively.

If you modify the data via the pointers returned, you must call the "updateGrid" call or you will not see your changes.

Parameters

[out]	r	storage for returning a pointer to the red components of the color values in the grid
[out]	g	storage for returning a pointer to the green components of the color values in the grid
[out]	b	storage for returning a pointer to the blue components of the color values in the grid

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred. This may occur if the fluid's color mode is set to kNone

MStatus setFalloffMode ( MFnFluid::FalloffMethod method )

Set the modes by which the shader falloff values in the grid are determined.

If the falloff grid is enabled, its values must be set by the user.

The method parameter may have the following values:

kNoFalloffGrid A constant value of 0.0 is used.
kStaticFalloffGrid Values in the grid are static

Parameters

[in] method method for determining the falloff value in the grid

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kInvalidParameter An enum value that was passed in is invalid
MS::kFailure An object error has occurred.

MStatus getFalloffMode ( MFnFluid::FalloffMethod & method )

Get the modes by which the falloff values in the grid are determined.

If the falloff grid is enabled, its values must be set by the user.

The method parameter may return the following values:

kNoFalloffGrid the shaders color is used
kStaticFalloffGrid Values in the grid are static

Parameters

[out] method storage for returning the method by which the falloff value in the grid is determined

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus setDensityMode	(	MFnFluid::FluidMethod	method,
		MFnFluid::FluidGradient	gradient
	)

Set the modes by which the density values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may have the following values:

kZero sets the density to zero across the volume
kStaticGrid values in the grid are static
kDynamicGrid values in the grid come from a dynamic solver
kGradient ramps the value based on the gradient setting (see below)

If the method is set to be kGradient, then the gradient argument is also used. This deterines how a gradient is applied to the volume. The possible values are as follows:

kConstant value is set to one across the volume
kXGradient ramp the value from zero to one along the X axis
kYGradient ramp the value from zero to one along the Y axis
kZGradient ramp the value from zero to one along the Z axis
kNegXGradient ramp the value from one to zero along the X axis
kNegYGradient ramp the value from one to zero along the Y axis
kNegZGradient ramp the value from one to zero along the Z axis
kCenterGradient ramps the value from one at the center to zero at the edges

Parameters

[in]	method	method for determining the fluid density in the grid
[in]	gradient	gradient type, only used if the method is kGradient

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kInvalidParameter An enum value that was passed in is invalid
MS::kFailure An object error has occurred.

MStatus getDensityMode	(	MFnFluid::FluidMethod &	method,
		MFnFluid::FluidGradient &	gradient
	)

Get the modes by which the density values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may return the following values:

kZero sets the density to zero across the volume
kStaticGrid values in the grid are static
kDynamicGrid values in the grid come from a dynamic solver
kGradient ramps the value based on the gradient setting (see below)

If the method returns kGradient, then the gradient type is also returned. This deterines how a gradient is applied to the volume. The possible return values are as follows:

kConstant value is set to one across the volume
kXGradient ramp the value from zero to one along the X axis
kYGradient ramp the value from zero to one along the Y axis
kZGradient ramp the value from zero to one along the Z axis
kNegXGradient ramp the value from one to zero along the X axis
kNegYGradient ramp the value from one to zero along the Y axis
kNegZGradient ramp the value from one to zero along the Z axis
kCenterGradient ramps the value from one at the center to zero at the edges

Parameters

[out]	method	storage for returning the method by which the fluid density in the grid is determined
[out]	gradient	storage for returning the gradient type, which is only relevant if the method is kGradient

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus setVelocityMode	(	MFnFluid::FluidMethod	method,
		MFnFluid::FluidGradient	gradient
	)

Set the modes by which the velocity values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may have the following values:

kZero sets the velocity to zero across the volume
kStaticGrid values in the grid are static
kDynamicGrid values in the grid come from a dynamic solver
kGradient ramps the value based on the gradient setting (see below)

If the method is set to be kGradient, then the gradient argument is also used. This deterines how a gradient is applied to the volume. The possible values are as follows:

kConstant value is set to one across the volume
kXGradient ramp the value from zero to one along the X axis
kYGradient ramp the value from zero to one along the Y axis
kZGradient ramp the value from zero to one along the Z axis
kNegXGradient ramp the value from one to zero along the X axis
kNegYGradient ramp the value from one to zero along the Y axis
kNegZGradient ramp the value from one to zero along the Z axis
kCenterGradient ramps the value from one at the center to zero at the edges

Parameters

[in]	method	method for determining the fluid velocity in the grid
[in]	gradient	gradient type, only used if the method is kGradient

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kInvalidParameter An enum value that was passed in is invalid
MS::kFailure An object error has occurred.

MStatus getVelocityMode	(	MFnFluid::FluidMethod &	method,
		MFnFluid::FluidGradient &	gradient
	)

Get the modes by which the velocity values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may return the following values:

kZero sets the velocity to zero across the volume
kStaticGrid values in the grid are static
kDynamicGrid values in the grid come from a dynamic solver
kGradient ramps the value based on the gradient setting (see below)

If the method returns kGradient, then the gradient type is also returned. This deterines how a gradient is applied to the volume. The possible return values are as follows:

kConstant value is set to one across the volume
kXGradient ramp the value from zero to one along the X axis
kYGradient ramp the value from zero to one along the Y axis
kZGradient ramp the value from zero to one along the Z axis
kNegXGradient ramp the value from one to zero along the X axis
kNegYGradient ramp the value from one to zero along the Y axis
kNegZGradient ramp the value from one to zero along the Z axis
kCenterGradient ramps the value from one at the center to zero at the edges

Parameters

[out]	method	storage for returning the method by which the fluid velocity in the grid is determined
[out]	gradient	storage for returning the gradient type, which is only relevant if the method is kGradient

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus setTemperatureMode	(	MFnFluid::FluidMethod	method,
		MFnFluid::FluidGradient	gradient
	)

Set the modes by which the temperature values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may have the following values:

kZero sets the temperature to zero across the volume
kStaticGrid values in the grid are static
kDynamicGrid values in the grid come from a dynamic solver
kGradient ramps the value based on the gradient setting (see below)

If the method is set to be kGradient, then the gradient argument is also used. This deterines how a gradient is applied to the volume. The possible values are as follows:

kConstant value is set to one across the volume
kXGradient ramp the value from zero to one along the X axis
kYGradient ramp the value from zero to one along the Y axis
kZGradient ramp the value from zero to one along the Z axis
kNegXGradient ramp the value from one to zero along the X axis
kNegYGradient ramp the value from one to zero along the Y axis
kNegZGradient ramp the value from one to zero along the Z axis
kCenterGradient ramps the value from one at the center to zero at the edges

Parameters

[in]	method	method for determining the fluid temperature in the grid
[in]	gradient	gradient type, only used if the method is kGradient

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kInvalidParameter An enum value that was passed in is invalid
MS::kFailure An object error has occurred.

MStatus getTemperatureMode	(	MFnFluid::FluidMethod &	method,
		MFnFluid::FluidGradient &	gradient
	)

Get the modes by which the temperature values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may return the following values:

kZero sets the temperature to zero across the volume
kStaticGrid values in the grid are static
kDynamicGrid values in the grid come from a dynamic solver
kGradient ramps the value based on the gradient setting (see below)

If the method returns kGradient, then the gradient type is also returned. This deterines how a gradient is applied to the volume. The possible return values are as follows:

kConstant value is set to one across the volume
kXGradient ramp the value from zero to one along the X axis
kYGradient ramp the value from zero to one along the Y axis
kZGradient ramp the value from zero to one along the Z axis
kNegXGradient ramp the value from one to zero along the X axis
kNegYGradient ramp the value from one to zero along the Y axis
kNegZGradient ramp the value from one to zero along the Z axis
kCenterGradient ramps the value from one at the center to zero at the edges

Parameters

[out]	method	storage for returning the method by which the fluid temperature in the grid is determined
[out]	gradient	storage for returning the gradient type, which is only relevant if the method is kGradient

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus setFuelMode	(	MFnFluid::FluidMethod	method,
		MFnFluid::FluidGradient	gradient
	)

Set the modes by which the fuel values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation. The fuel value for a cell can be thought of as the amount of fuel contained in the cell that will be consumed during the simulation.

The method parameter may have the following values:

kZero sets the fuel to zero across the volume
kDynamicGrid values in the grid come from a dynamic solver
kGradient ramps the value based on the gradient setting (see below)

Note that kStatic is not an option for the fuel mode. A static grid of fuel values would not make sense as the solver needs to use up the fuel during the simulation.

If the method is set to be kGradient, then the gradient argument is also used. This deterines how a gradient is applied to the volume. The possible values are as follows:

kConstant value is set to one across the volume
kXGradient ramp the value from zero to one along the X axis
kYGradient ramp the value from zero to one along the Y axis
kZGradient ramp the value from zero to one along the Z axis
kNegXGradient ramp the value from one to zero along the X axis
kNegYGradient ramp the value from one to zero along the Y axis
kNegZGradient ramp the value from one to zero along the Z axis
kCenterGradient ramps the value from one at the center to zero at the edges

Parameters

[in]	method	method for determining the fluid fuel in the grid
[in]	gradient	gradient type, only used if the method is kGradient

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kInvalidParameter An enum value that was passed in is invalid
MS::kFailure An object error has occurred.

MStatus getFuelMode	(	MFnFluid::FluidMethod &	method,
		MFnFluid::FluidGradient &	gradient
	)

Get the modes by which the fuel values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may return the following values:

kZero sets the fuel values to zero across the volume
kStaticGrid values in the grid are static
kDynamicGrid values in the grid come from a dynamic solver
kGradient ramps the value based on the gradient setting (see below)

If the method returns kGradient, then the gradient type is also returned. This deterines how a gradient is applied to the volume. The possible return values are as follows:

kConstant value is set to one across the volume
kXGradient ramp the value from zero to one along the X axis
kYGradient ramp the value from zero to one along the Y axis
kZGradient ramp the value from zero to one along the Z axis
kNegXGradient ramp the value from one to zero along the X axis
kNegYGradient ramp the value from one to zero along the Y axis
kNegZGradient ramp the value from one to zero along the Z axis
kCenterGradient ramps the value from one at the center to zero at the edges

Parameters

[out]	method	storage for returning the method by which the fluid fuel values in the grid is determined
[out]	gradient	storage for returning the gradient type, which is only relevant if the method is kGradient

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus setCoordinateMode ( MFnFluid::CoordinateMethod method )

Set the modes by which the UVW coordinate values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may have the following values:

kFixed values are equal the object space coordinates
kGrid coordinate values will be moved using the current density solver

Parameters

[in] method method for determining the fluid UVW coordinates in the grid

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kInvalidParameter An enum value that was passed in is invalid
MS::kFailure An object error has occurred.

MStatus getCoordinateMode ( MFnFluid::CoordinateMethod & method )

Get the modes by which the UVW coordinates values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may return the following values:

kFixed values are equal the object space coordinates
kGrid coordinate values will be moved using the current density solver

Parameters

[out] method storage for returning the method by which the fluid coordinate values in the grid is determined

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus setColorMode ( MFnFluid::ColorMethod method )

Set the modes by which the color values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may have the following values:

kZero the shaders color is used
kStaticGrid values in the grid are static
kDynamicGrid values in the grid come from a dynamic solver

Parameters

[in] method method for determining the fluid color in the grid

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kInvalidParameter An enum value that was passed in is invalid
MS::kFailure An object error has occurred.

MStatus getColorMode ( MFnFluid::ColorMethod & method )

Get the modes by which the color values in the grid are determined.

The values may be set by the user in various ways, or they may be computed as part of a simulation.

The method parameter may return the following values:

kZero the shaders color is used
kStaticGrid values in the grid are static
kDynamicGrid values in the grid come from a dynamic solver

Parameters

[out] method storage for returning the method by which the fluid color in the grid is determined

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus getForceAtPoint	(	const MPointArray &	point,
		const MVectorArray &	velocity,
		const MDoubleArray &	mass,
		MVectorArray &	force,
		double	deltaTime = `1.0 / 24.0`
	)

Compute the force of the fluid as a field on an array of points, given their position, velocity, and mass.

This method uses MPointArray to represent the positions of points. If a point instance is in a rational form or a homogenous form, you should reset it to be in the cartesian form P(x, y, z, 1).

Parameters

[in]	point	array of positions for each point.
[in]	velocity	array of velocities for each point. If the length of the velocity array is 0, a velocity of 0.0 is assumed for all the points.
[in]	mass	array of mass values for each point. If the length of the mass array is 0, a mass of 1.0 is assumed for all the points.
[out]	force	output array of forces applied to each point. If the length of the force array supplied is 0, the array is automatically resized. If the contents of the force array contains data, the computed force is added to the supplied data. This can be useful to accumulate forces of multiple fields.
[in]	deltaTime	time increment in seconds. Default is (1.0 / 24.0 fps).

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

MStatus getForceAtPoint	(	const MVectorArray &	point,
		const MVectorArray &	velocity,
		const MDoubleArray &	mass,
		MVectorArray &	force,
		double	deltaTime = `1.0 / 24.0`
	)

Compute the force of a field on an array of points, given their position, velocity, and mass.

Note that only the Air and Vortex fields require a time increment to compute forces, all other fields will igonore this argument.

This method uses MVectorArray to represent the positions of a point.

Parameters

[in]	point	array of positions for each point.
[in]	velocity	array of velocities for each point. If the length of the velocity array is 0, a velocity of 0.0 is assumed for all the points. Note the velocity array is a requirement for the Air and Drag fields to compute forces.
[in]	mass	array of mass values for each point. If the length of the mass array is 0, a mass of 1.0 is assumed for all the points.
[out]	force	output array of forces applied to each point. If the length of the force array supplied is 0, the array is automatically resized. If the contents of the force array contains data, the computed force is added to the supplied data. This can be useful to accumulate forces of multiple fields.
[in]	deltaTime	time increment in seconds for usage with the Air and Vortex fields. Default is (1.0 / 24.0 fps).

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

bool toGridIndex	(	const MPoint &	objectSpacePoint,
		int3 &	gridCoords,
		MStatus *	status = `NULL`
	)

For the given point in object space, get the grid indices of the voxel that it happens to lie in.

If the point is outside the fluid, the method returns false, and the indices should not be used.

Parameters

[in]	objectSpacePoint	an object space location
[out]	gridCoords	the voxel indices, if the point falls inside a voxel
[out]	status	Status code

Returns: True if the point is inside the fluid, false otherwise

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

Examples:: simpleFluidEmitter/simpleFluidEmitter.cpp.

MStatus voxelCenterPosition	(	int	xi,
		int	yi,
		int	zi,
		MPoint &	objectSpacePoint
	)

For the given voxel, get the location of the center in object space.

If the voxel indices are not valid, the point may not be set to a valid point

Parameters

[in]	xi	the voxel x index
[in]	yi	the voxel y index
[in]	zi	the voxel z index
[out]	objectSpacePoint	the object space location

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure The voxel index was out of range, or an object error has occurred.

MStatus updateGrid ( )

Tells the fluid shape that the contents of the fluid grid has changed.

It is necessary to call this routine after modifying internal fluid data via a pointer recieved from any of the access routines in this function set. Failure to call this will result in the fluid not drawing with your changes.

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

Examples:: simpleFluidEmitter/simpleFluidEmitter.cpp.

void emitIntoArrays	(	float	val,
		int	x,
		int	y,
		int	z,
		float	density,
		float	heat,
		float	fuel,
		bool	doColor,
		const MColor &	emitColor
	)

Use this method to add density, heat, fuel, and/or color to a particular voxel of a fluid.

Parameters

[in]	val	multiplier applied to the specified density, heat, and fuel values.
[in]	x	voxel index in x
[in]	y	voxel index in y
[in]	z	voxel index in z
[in]	density	amount of density to add to the voxel
[in]	heat	amount of heat to add to the voxel
[in]	fuel	amount of fuel to add to the voxel
[in]	doColor	if true, then color specified by "emitColor" will be blended into the voxel's current color, with the blend coefficients being determined by the amount of density that is being added to the voxel.
[in]	emitColor	color to be blended into the voxel.

Examples:: simpleFluidEmitter/simpleFluidEmitter.cpp.

int index	(	int	xi,
		int	yi
	)

This is a utility routine for finding the index of a cell in an array of fluid data.

The data in the fluid shape, such as color and density are passed back as single dimensional arrays of numeric values. This method converts three dimensional coordinates of a cell into the index value that refers the cell's value in the single dimensional array.

Note that no bounds checking is performed.

Parameters

[in]	xi	index in x
[in]	yi	index in y

Returns: Index in the single dimensional array

Examples:: simpleFluidEmitter/simpleFluidEmitter.cpp.

int index	(	int	xi,
		int	yi,
		int	zi
	)

This is a utility routine for finding the index of a cell in an array of fluid data.

The data in the fluid shape, such as color and density are passed back as single dimensional arrays of numeric values. This method converts three dimensional coordinates of a cell into the index value that refers the cell's value in the single dimensional array.

Note that no bounds checking is performed.

Parameters

[in]	xi	index in x
[in]	yi	index in y
[in]	zi	index in z

Returns: Index in the single dimensional array

void index	(	int	index,
		int &	xi,
		int &	yi,
		int &	zi
	)

This is a utility routine for finding the coordinates of a cell in an array of fluid data given the index.

The data in the fluid shape, such as color and density are passed back as single dimensional arrays of numeric values. This method converts the index value that refers to a cell's value in the single dimensional array into the three dimensional coordinates of the cell.

Note that no bounds checking is performed.

Parameters

[in]	index	index to convert into coordinates
[out]	xi	storage for the index in x
[out]	yi	storage for the index in y
[out]	zi	storage for the index in z

int index	(	int	xi,
		int	yi,
		int	zi,
		int	xres,
		int	yres,
		int	zres
	)

This is a utility routine for finding the index of a cell given the X, Y and Z resolutions.

This is intended for use primarily with the velocity arrays, where the resolutions are different for each array. The X velocity array is one bigger in X, etc.

This method converts three dimensional coordinates of a cell into the index value that refers the cell's value in the single dimensional array.

Note that no bounds checking is performed.

Parameters

[in]	xi	index in x
[in]	yi	index in y
[in]	zi	index in z
[in]	xres	resolution in x
[in]	yres	resolution in y
[in]	zres	resolution in z

Returns: Index in the single dimensional array

void index	(	int	index,
		int	xres,
		int	yres,
		int	zres,
		int &	xi,
		int &	yi,
		int &	zi
	)

This is a utility routine for finding the coordinates of a cell given the index, and the X, Y and Z resolutions.

This is intended for use primarily with the velocity arrays, where the resolutions are different for each array. The X velocity array is one bigger in X, etc.

This method converts the index value that refers to a cell's value in the single dimensional array into the three dimensional coordinates of the cell.

Note that no bounds checking is performed.

Parameters

[in]	index	index to convert into coordinates
[in]	xres	resolution in x
[in]	yres	resolution in y
[in]	zres	resolution in z
[out]	xi	storage for the index in x
[out]	yi	storage for the index in y
[out]	zi	storage for the index in z

bool isAutoResize ( )

Is this an autoresize fluid?

Returns: true if autoresize, false otherwise.

bool isResizeToEmitter ( )

If this is an autoresize fluid, should it also resize to the emitter.

Returns: true if autoresize and resizeToEmitter, false otherwise.

MStatus expandToInclude	(	const MPoint &	min,
		const MPoint &	max
	)

Tells the fluid shape to autoresize to include these two points This would normally be used in a fluid emitter node if the fluid had resizeToEmitter turned on.

This may fail if the fluid is not autoRise and resizeToEmitter, or if the fluid has reached its maxResolution

Parameters

[in]	min	point at lower corner of bounding box
[in]	max	point at upper corner of boinding box

Returns: Status code

Status Codes:

MS::kSuccess The method was successful.
MS::kFailure An object error has occurred.

The documentation for this class was generated from the following files:

MFnFluid.h
MFnFluid.cpp

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