MSwatchRenderBase Class Reference

#include <MSwatchRenderBase.h>

Class Description

Swatch Render Base class.

A class providing an interface through which a plugin can implement a class to provide custom rendered images for swatches which are displayed in hypershade and the Attribute Editor.

By deriving from this class and implementing the doIteration function, swatches for nodes (having the required classification) can be custom rendered by the plugin.

The derived class needs to be registered with Maya using the interface provided by MSwatchRenderRegister. Please refer to documentation of MSwatchRenderRegister for more details.

To indicate that swatch for a certain node type will be generated by the plugin the classfication string of the node needs to contain the following string : "swatch/<swatch generator name>" The swatch generator name string should match the name used to register the swatch generator class.

Inheritance diagram for MSwatchRenderBase:

Public Member Functions
	MSwatchRenderBase (MObject obj, MObject renderObj, int res)
	Class constructor. More...
virtual	~MSwatchRenderBase ()
	Class destructor.
virtual bool	doIteration ()
	Method called from the MSwatchRenderRegister for generation of swatch image. More...
virtual bool	renderParallel ()
	Method indicates if the swatch is rendered parallel. More...
virtual void	cancelParallelRendering ()
	Method to cancel the parallel rendering. More...
MObject	swatchNode () const
	This method returns the node for which the swatch is required to be generated.
MObject	node () const
	This method returns the node that is used to compute the swatch.
int	resolution () const
	This method returns the expected resolution of the swatch.
MImage &	image ()
	This method returns the the render swatch as an image.
void	setRenderQuality (int)
	Method to set the render quality in which the swatch will be rendered. More...
int	renderQuality () const
	Returns the quality in which the swatch will be rendered. More...

Static Public Member Functions
static void	cancelCurrentSwatchRender ()
	The method cancels the swatch which is being rendered in parallel, and push the swatch render item back to the render queue after. More...
static void	enableSwatchRender (bool enable)
	Enable/disable swatch rendering. More...

Protected Member Functions
void	finishParallelRender ()
	Method to update the swatch image when the parallel rendering is finished. More...

Constructor & Destructor Documentation

OPENMAYA_MAJOR_NAMESPACE_OPEN MSwatchRenderBase	(	MObject	obj,
		MObject	renderObj,
		int	res
	)

Class constructor.

Saves the Node object and image resolution in members for future use.

Parameters

[in]	obj	The node object for which the swatch needs to be generated.
[in]	renderObj	The node which will generate the swatch.
[in]	res	The expected resolution of the swatch image.

Member Function Documentation

bool doIteration ( )

virtual

Method called from the MSwatchRenderRegister for generation of swatch image.

The doIteration function is called repeatedly (during idle events) until it returns true. Using this swatch image can be generated in stages.

This method should be overridden in derived classes which can compute the swatches in several steps.

Returns

False as long as the swatch computation is not completed.

Reimplemented in MHWShaderSwatchGenerator.

bool renderParallel ( )

virtual

Method indicates if the swatch is rendered parallel.

Returns

False by default.

void cancelParallelRendering ( )

virtual

Method to cancel the parallel rendering.

The derived classes should provide the implementation accordingly if required.

void setRenderQuality

(

int

quality

)

Method to set the render quality in which the swatch will be rendered.

The derived classes should make sure that the larger the number is set, the better quality is applied.

Parameters

[in]

quality

The quality to render the swatch

int renderQuality

(

)

const

Returns the quality in which the swatch will be rendered.

Returns

The quality to render the swatch

void cancelCurrentSwatchRender ( )

static

The method cancels the swatch which is being rendered in parallel, and push the swatch render item back to the render queue after.

The render plugins should make sure that MSwatchRenderBase::cancelParallelRendering() is implemented acoordingly.

void enableSwatchRender ( bool  enable )

static

Enable/disable swatch rendering.

Parameters

[in]

enable

Flag indicating if swatch rendering should be enabled or disabled.

void finishParallelRender ( )

protected

Method to update the swatch image when the parallel rendering is finished.

If swatch is rendered parallel, this method must be called after parallel rendering finished.

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

• MSwatchRenderBase.h
• MSwatchRenderBase.cpp