UVWMapper Class Reference

#include <UVWMapper.h>

Inheritance diagram for UVWMapper:

Public Member Functions
DllExport	UVWMapper ()
DllExport	UVWMapper (int type, const Matrix3 &tm, int cap=FALSE, float utile=1.0f, float vtile=1.0f, float wtile=1.0f, int uflip=FALSE, int vflip=FALSE, int wflip=FALSE)
DllExport	UVWMapper (UVWMapper &m)
DllExport UVVert	MapPoint (Point3 p, const Point3 &norm, int *nan=NULL)
DllExport UVVert	TileFlip (UVVert uvw)
DllExport int	MainAxis (const Point3 &n)
bool	NormalMatters ()

Public Attributes
int	type
int	cap
float	utile
float	vtile
float	wtile
int	uflip
int	vflip
int	wflip
Matrix3	tm

Additional Inherited Members
Static Public Member Functions inherited from MaxHeapOperators
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Detailed Description

See also

Class Mesh, Class Matrix3, Class Point3.

Description:

Prior to release 3.0, developers could implement Object::ApplyUVWMap() in their objects, but didn't have access to the algorithm 3ds Max uses internally to turn the mapping types (MAP_BOX, MAP_PLANE, etc) into an actual vertex-to-mapping-coordinate function. This class now makes this available.

The constructors for the class initialize the data members with information about the mapping desired. The main method, MapPoint(), maps a point in object space into the UVW map defined by this mapper.

Note: typedef Point3 UVVert;

Data Members:

int type;

The mapping type. One of the following values:

MAP_PLANAR

MAP_CYLINDRICAL

MAP_SPHERICAL

MAP_BALL

MAP_BOX

MAP_FACE

int cap;

This is used with MAP_CYLINDRICAL. If nonzero, then any face normal that is pointing more vertically than horizontally will be mapped using planar coordinates.

float utile;

Number of tiles in the U direction.

float vtile;

Number of tiles in the V direction.

float wtile;

Number of tiles in the W direction.

int uflip;

If nonzero the U values are mirrored.

int vflip

If nonzero the V values are mirrored.

int wflip;

If nonzero the W values are mirrored.

Matrix3 tm;

This defines the mapping space. As each point is mapped, it is multiplied by this matrix, and then it is mapped.

Constructor & Destructor Documentation

UVWMapper() [1/3]

DllExport UVWMapper

(

)

Remarks

Constructor. The data members are initialized as follows:

type = MAP_BOX;

utile = 1.0f;

vtile = 1.0f;

wtile = 1.0f;

uflip = 0;

vflip = 0;

wflip = 0;

cap = 0;

tm.IdentityMatrix();

UVWMapper() [2/3]

DllExport UVWMapper	(	int	type,
		const Matrix3 &	tm,
		int	cap = FALSE,
		float	utile = 1.0f,
		float	vtile = 1.0f,
		float	wtile = 1.0f,
		int	uflip = FALSE,
		int	vflip = FALSE,
		int	wflip = FALSE
	)

Remarks

Constructor. The data members are initialized to the values passed.

UVWMapper() [3/3]

DllExport UVWMapper

(

UVWMapper &

m

)

Remarks

Constructor. The data members are initialized from the UVWMapper passed.

Member Function Documentation

MapPoint()

DllExport UVVert MapPoint	(	Point3	p,
		const Point3 &	norm,
		int *	nan = NULL
	)

Remarks

This method maps a point in object space into the UVW map defined by this mapper. This gives the UVW coordinates for the specified point according to this mapper's mapping scheme.

Parameters:

Point3 p

The location of a vertex, i.e. the point being mapped. This point should NOT be transformed by the UVWMapper's tm, as this happens internally.

const Point3 & norm

The direction of the surface normal at p. This information is only required for types MAP_BOX or MAP_CYLINDRICAL. See the method NormalMatters() below.

int *nan=NULL

If non-NULL, this points to an int which should be set to FALSE if this mapping is good for all faces using this vertex, or TRUE if different faces should have different mapping coordinates. This is generally set to TRUE more often than absolutely necessary to make sure nothing is missed.

Returns

The mapped point.

TileFlip()

DllExport UVVert TileFlip

(

UVVert

uvw

)

Remarks

Applies the UVWMap's tile and flip parameters to the given UVVert, and returns the result..

Parameters:

UVVert uvw

The input UVVert.

Returns

The modified UVVert.

MainAxis()

DllExport int MainAxis

(

const Point3 &

n

)

Remarks

This method indicates which direction the given vector "chiefly points", after vector transformation by the UVWMapper's transform.

Parameters:

const Point3 & n

The input vector whose main axis is determined.

Returns

One of the following values:

0: tm.VectorTransform(n) points mainly in the +x direction.

1: tm.VectorTransform(n) points mainly in the +y direction.

2: tm.VectorTransform(n) points mainly in the +z direction.

3: tm.VectorTransform(n) points mainly in the -x direction.

4: tm.VectorTransform(n) points mainly in the -y direction.

5: tm.VectorTransform(n) points mainly in the -z direction.

NormalMatters()

bool NormalMatters ( )

inline

Remarks

This method lets you know whether the current mapping type uses the normal information. If FALSE, it doesn't matter what value you pass as a normal to MapPoint. If TRUE, the MainAxis of the normal is used to determine the mapping.

{ return ((type==MAP_BOX || type==MAP_ACAD_BOX)||((type==MAP_CYLINDRICAL || type==MAP_ACAD_CYLINDRICAL )&&cap)) ? TRUE:FALSE; }

Member Data Documentation

type

int type

cap

int cap

utile

float utile

vtile

float vtile

wtile

float wtile

uflip

int uflip

vflip

int vflip

wflip

int wflip

tm

Matrix3 tm