MRenderUtil Class Reference
[OpenMayaRender - API module for rendering]

#include <MRenderUtil.h>

List of all members.

---

Detailed Description

Common API rendering functions.

MRenderUtil is a class which provides static API methods to access Maya's rendering functionalities.

Public Types
enum	MRenderState {    kNotRendering, kBatchRender, kInteractiveRender, kIprRender,    kHardwareRender }
	Defines the current rendering state of Maya. More...
enum	MRenderPass {    kAll, kColorOnly, kShadowOnly, kAmbientOnly,    kDiffuseOnly, kSpecularOnly }
	Defines the current pass of Maya. More...
Static Public Member Functions
static MRenderState	mayaRenderState ()
static MStatus	raytrace (const MFloatVector &rayOrigin, const MFloatVector &rayDirection, const void *objectId, const void *raySampler, const short rayDepth, MFloatVector &resultColor, MFloatVector &resultTransparency, const bool isReflectedRays=true)
static MStatus	raytrace (const MFloatVectorArray &rayOrigins, const MFloatVectorArray &rayDirections, const void *objectId, const void *raySampler, const short rayDepth, MFloatVectorArray &resultColors, MFloatVectorArray &resultTransparencies, const bool isReflectedRays=true)
static MStatus	raytraceFirstGeometryIntersections (const MFloatVectorArray &rayOrigins, const MFloatVectorArray &rayDirections, const void *objectId, const void *raySampler, MFloatVectorArray &resultIntersections, MIntArray &resultIntersected)
static MStatus	sampleShadingNetwork (MString shadingNodeName, int numSamples, bool useShadowMaps, bool reuseMaps, MFloatMatrix &cameraMatrix, MFloatPointArray *points, MFloatArray *uCoords, MFloatArray *vCoords, MFloatVectorArray *normals, MFloatPointArray *refPoints, MFloatVectorArray *tangentUs, MFloatVectorArray *tangentVs, MFloatArray *filterSizes, MFloatVectorArray &resultColors, MFloatVectorArray &resultTransparencies)
static bool	generatingIprFile ()
static MString	relativeFileName (const MString &absFileName, MStatus *ReturnStatus=NULL)
static bool	exactFileTextureName (const MObject &fileNode, MString &texturePath, MStatus *ReturnStatus=NULL)
static bool	exactFileTextureName (const MString &baseName, bool useFrameExt, const MString &currentFrameExt, MString &exactName, MStatus *ReturnStatus=NULL)
static bool	convertPsdFile (const MObject &fileNode, MString &texturePath, const bool &state=false, MStatus *ReturnStatus=NULL)
	Internal use only.
static bool	exactImagePlaneFileName (const MObject &imagePlaneNode, MString &texturePath, MStatus *ReturnStatus=NULL)
static MString	exactFileTextureName (const MObject &fileNode, MStatus *ReturnStatus=NULL)
static MString	exactFileTextureName (const MString &baseName, bool useFrameExt, const MString &currentFrameExt, MStatus *ReturnStatus=NULL)
static MString	convertPsdFile (const MObject &fileNode, const bool &state=false, MStatus *ReturnStatus=NULL)
	Internal use only.
static MString	exactImagePlaneFileName (const MObject &imagePlaneNode, MStatus *ReturnStatus=NULL)
static bool	inCurrentRenderLayer (const MDagPath &objectPath, MStatus *ReturnStatus=NULL)
static MRenderPass	renderPass (void)
static MString	mainBeautyPassCustomTokenString ()
static MString	mainBeautyPassName ()
static float	diffuseReflectance (const void *lightBlindData, const MFloatVector &lightDirection, const MFloatVector &pointCamera, const MFloatVector &normal, bool lightBackFace, MStatus *ReturnStatus=NULL)
static MFloatVector	maximumSpecularReflection (const void *lightBlindData, const MFloatVector &lightDirection, const MFloatVector &pointCamera, const MFloatVector &normal, const MFloatVector &rayDirection, MStatus *ReturnStatus=NULL)
static float	lightAttenuation (const void *lightBlindData, const MFloatVector &pointCamera, const MFloatVector &normal, bool lightBackFace, MStatus *ReturnStatus=NULL)
static float	hemisphereCoverage (const void *lightBlindData, const MFloatVector &lightDirection, const MFloatVector &pointCamera, const MFloatVector &rayDirection, bool lightBackFace, MStatus *ReturnStatus=NULL)
static void	sendRenderProgressInfo (const MString &pixFile, int percentageDone)
static void	getCommonRenderSettings (MCommonRenderSettingsData &rgData)
static MStatus	renderObjectItem (const void *objectId, MSelectionList &item)

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Member Enumeration Documentation

enum MRenderUtil::MRenderState

Defines the current rendering state of Maya.

Enumerator:

kNotRendering	Not rendering.
kBatchRender	Performing a batch render.
kInteractiveRender	Performing an interactive render.
kIprRender	Performing an IPR render.
kHardwareRender	Performing a hardware render.

enum MRenderUtil::MRenderPass

Defines the current pass of Maya.

Enumerator:

kAll	Default case, compute everything.
kColorOnly	Compute only color information, no shadows.
kShadowOnly	Compute only shadow information, no color.
kAmbientOnly	Compute only ambient information.
kDiffuseOnly	Compute only diffuse information.
kSpecularOnly	Compute only specular information.

---

Member Function Documentation

MRenderUtil::MRenderState MRenderUtil::mayaRenderState

(

)

[static]

Returns an enumerated type specifying the current state of the Maya renderer.

Returns:

• MRenderUtil::kNotRendering Maya is not currently rendering
• MRenderUtil::kBatchRender Maya is performing a batch render
• MRenderUtil::kInteractiveRender Maya is performing an interactive render
• MRenderUtil::kIprRender Maya is performing an IPR render
• MRenderUtil::kHardwareRender Maya is performing a hardware render

MStatus MRenderUtil::raytrace	(	const MFloatVector &	rayOrigin,
		const MFloatVector &	rayDirection,
		const void *	notUsed,
		const void *	raySampler,
		const short	rayDepth,
		MFloatVector &	resultColor,
		MFloatVector &	resultTransparency,
		const bool	isReflectedRays = true
	)			[static]

This utility method provides functionality to raytrace from within a shader plug-in.

This method shoots a single ray given a ray origin and a ray direction, and returns the color and transparency of the result.

In order for a shader plug-in to raytrace, the following steps are necessary:

raySampler is needed from the renderer. This can be obtained by creating an input attribute named 'raySampler' (rtr).

rayDepth is needed from the renderer. This can be obtained by creating an input attribute named 'rayDepth' (rd).

The "Enable Raytracing" flag needs to be turned on in renderGlobal-> renderQuality->raytracing.

isReflectedRays tells if these rays are for reflection or refraction. This allows the raytracer to check the corresponding ray depth limit under renderGlobal->renderQuality for terminating the rays.

All objects to be seen by the raytracer need to have their "Visible In Reflections" or "Visible In Refraction" flags turned on.

This method only works in the software renderer.

Parameters:

[in]	rayOrigin	Origin of the ray to shoot from in camera space
[in]	rayDirection	Direction of the ray to shoot at in camera space
[in]	notUsed	unused argument left for compatibility
[in]	raySampler	Pointer to the raytracer from the renderer
[in]	rayDepth	Current ray depth from the renderer
[in]	resultColor	Storage for the result color
[in]	resultTransparency	Storage for the result transparency
[in]	isReflectedRays	true for reflected rays (default), false for refracted rays

Returns:

Status Code

• MS::kSuccess Return is valid
• MS::kInvalidParameter Raytracing failed due to bad raySampler pointer passed in.

Examples:

phongShader.cpp.

MStatus MRenderUtil::raytrace	(	const MFloatVectorArray &	rayOrigins,
		const MFloatVectorArray &	rayDirections,
		const void *	notUsed,
		const void *	raySampler,
		const short	rayDepth,
		MFloatVectorArray &	resultColors,
		MFloatVectorArray &	resultTransparencies,
		const bool	isReflectedRays = true
	)			[static]

This utility method provides functionality to raytrace from within a shader plug-in.

This method shoots a number of rays given ray origins and ray directions, and returns the colors and transparencies of the results.

The size of rayOrigins, rayDirections, colors, and transparencies arrays must be the same.

In order for a shader plug-in to raytrace, the following steps are necessary:

raySampler is needed from the renderer. This can be obtained by creating an input attribute named 'raySampler' (rtr).

rayDepth is needed from the renderer. This can be obtained by creating an input attribute named 'rayDepth' (rd).

The "Enable Raytracing" flag needs to be turned on in renderGlobal-> renderQuality->raytracing.

isReflectedRays tells if these rays are for reflection or refraction. This allows the raytracer to check the corresponding ray depth limit under renderGlobal->renderQuality for terminating the rays.

All objects to be seen by the raytracer need to have their "Visible In Reflections" or "Visible In Refraction" flags turned on.

This method only works in the software renderer.

Parameters:

[in]	rayOrigins	Origins of the ray to shoot from in camera space
[in]	rayDirections	Directions of the ray to shoot at in camera space
[in]	notUsed	unused argument left for compatability
[in]	raySampler	Pointer to the raytracer from the renderer
[in]	rayDepth	Current ray depth from the renderer
[in]	resultColors	Storage for the result colors
[in]	resultTransparencies	Storage for the result transparencies
[in]	isReflectedRays	true for reflected rays (default), false for refracted rays

Returns:

Status Code

• MS::kSuccess Return is valid
• MS::kIndexOutOfRange Array size do not match.
• MS::kInvalidParameter Raytracing failed due to bad raySampler pointer passed in.

MStatus MRenderUtil::raytraceFirstGeometryIntersections	(	const MFloatVectorArray &	rayOrigins,
		const MFloatVectorArray &	rayDirections,
		const void *	notUsed,
		const void *	raySampler,
		MFloatVectorArray &	resultIntersections,
		MIntArray &	resultIntersected
	)			[static]

This utility method provides functionality to find the location of the first geometry intersected by a ray from within a shader plug-in.

This method shoots a number of rays given ray origins and ray directions, and returns whether the rays intersected anything, and if so, the locations of the first geometry intersected in camera space. The plug-in should check the resultIntersected values to see if a ray has intersected any geometry (0 = no geometry intersected, 1 = geometry intersected).

The size of rayOrigins, rayDirections, resultIntersections, and resultIntersected arrays must be the same.

In order for a shader plug-in to raytrace, the following steps are necessary:

raySampler is needed from the renderer. This can be obtained by creating an input attribute named 'raySampler' (rtr).

The "Enable Raytracing" flag needs to be turned on in renderGlobal-> renderQuality->raytracing.

All objects to be seen by the raytracer need to have their "Visible In Reflections" flags turned on.

This method only works in the software renderer.

Parameters:

[in]	rayOrigins	Origins of the ray to shoot from in camera space
[in]	rayDirections	Directions of the ray to shoot at in camera space
[in]	notUsed	unused argument left for compatability
[in]	raySampler	Pointer to the raytracer from the renderer
[in]	resultIntersections	Storage for the result intersection locations in camera space
[in]	resultIntersected	Storage for the result intersected flags (0 = no geometry intersected, 1 = geometry intersected)

Returns:

Status Code

• MS::kSuccess Return is valid
• MS::kIndexOutOfRange Array size do not match.
• MS::kInvalidParameter Raytracing failed due to bad raySampler pointer passed in.

MStatus MRenderUtil::sampleShadingNetwork	(	MString	shadingNodeName,
		int	numSamples,
		bool	useShadowMaps,
		bool	reuseMaps,
		MFloatMatrix &	cameraMatrix,
		MFloatPointArray *	points,
		MFloatArray *	uCoords,
		MFloatArray *	vCoords,
		MFloatVectorArray *	normals,
		MFloatPointArray *	refPoints,
		MFloatVectorArray *	tangentUs,
		MFloatVectorArray *	tangentVs,
		MFloatArray *	filterSizes,
		MFloatVectorArray &	resultColors,
		MFloatVectorArray &	resultTransparencies
	)			[static]

This utility method allows you to sample a shading node/shading engine. You can specify the location and property of the sample point, and the method will return the result color and transparency. If you are sampling a shading engine, and there are lights in the scene, you can optionally request shadows to be computed as well.

If you specify a shading node to be evaluated, you'll need to provide the attribute to be evaluated. For example, valid shading nodes are checker1.outAlpha, file1.outColor, etc.

If you specify a shading engine to be evaluated, only the name will be needed. For example, valid shading engines are initialShadingGroup, phong1SG, etc.

Since setting up sampling is an expensive operation, try to pass in as many sample points at one time as possible and let the sampler process them in batch. Try to avoid calling the sampler with just one sample.

For extremely complicated shading networks, it is possible that passing in too many samples in one batch will cause a stack overflow. If this condition occurs, simply reduce the number of samples per batch.

Certain type of shading network requires certain type of input, and not all inputs are needed. For example, a 2D texture such as file or checker does not need point/normal/tangent information. Pass in NULL for parameters which are not needed.

In general, 2D textures require UV coordinates, 3D textures require points and refPoints, lighting calculations require points and normals.

To calculate camera space related shaders, such as hilights in a phong shader, an eye to world matrix needs to be supplied. This matrix is used to convert supplied world coordinates into camera coordinate. The matrix can be obtained by getting the inclusive matrix of the camera's DAG node.

This method can be used in both interactive and batch.

Parameters:

[in]	shadingNodeName	Name of the shading node/shading engine
[in]	numSamples	Number of samples to be calculated
[in]	useShadowMaps	Whether to calculate shadows
[in]	reuseMaps	If calculating shadows, whether to reuse shadowmaps
[in]	cameraMatrix	The eyeToWorld matrix to be used for conversion
[in]	points	Locations to be sampled in world space
[in]	uCoords	U coordinates of the samples
[in]	vCoords	V coordinates of the samples
[in]	normals	Normals at the sample points in world space
[in]	refPoints	RefPoints to be used for 3D texture in world space
[in]	tangentUs	U tangents at the sample points in world space
[in]	tangentVs	V tangents at the sample points in world space
[in]	filterSizes	Filter sizes to be used for 2D/3D textures
[in]	resultColors	Storage for result colors
[in]	resultTransparencies	storage for result transparencies

Returns:

Status Code

• MS::kSuccess Return is valid
• MS::kNoModelActive Unable to get the active model
• MS::kObjectDoesNotExist Unable to find the specified shadingNodeName
• MS::kInvalidDataType Specified node is not a shading engine
• MS::kFailure Failed to sample the given shading network

Examples:

sampleCmd.cpp, and sampleParticles.cpp.

bool MRenderUtil::generatingIprFile

(

)

[static]

Returns true if an IPR file is being created. This can be used to optimize the IPR file. Lights do not need to request particle information (IPR does not support particle rendering) when creating a IPR file.

Returns:

true if IPR file is being generated, false otherwise.

MString MRenderUtil::relativeFileName	(	const MString &	absFileName,
		MStatus *	ReturnStatus = NULL
	)			[static]

Extract relative file name from the given (absolute) file name. If the given file name does not begin with a project root, return value is same as the input file name.

Parameters:

[in]	absFileName	input file name
[out]	ReturnStatus	status code

Returns:

• file name without the project path

Status Codes:

• MS::kSuccess Return is valid
• MS::kInvalidParameter absFileName is empty

bool MRenderUtil::exactFileTextureName	(	const MObject &	fileNode,
		MString &	texturePath,
		MStatus *	ReturnStatus = NULL
	)			[static]

Attempts to resolve the file texture name specified on a file texture node into an absolute path to an image file on disk. The function applies exactly the same logic that is used by the file texture node internally for resolving the image file path.

Python Notes:

This method is not supported in Python. See the version which returns a string.

Parameters:

[in]	fileNode	a file texture node
[out]	texturePath	returns an absolute pathname to the texture file referenced by the node.
[out]	ReturnStatus	status code

Returns:

true if the image file pathname was successfully resolved, false otherwise.

Status Codes:

• MS::kSuccess Return is valid
• MS::kInvalidParameter fileNode pointer is not a valid file texture node.

bool MRenderUtil::exactFileTextureName	(	const MString &	baseName,
		bool	useFrameExt,
		const MString &	currentFrameExt,
		MString &	exactName,
		MStatus *	ReturnStatus = NULL
	)			[static]

Attempts to resolve the file name specified into an absolute path to a file on disk. The function applies exactly the same logic that is used by the file texture node internally for resolving the image file path.

Python Notes:

This method is not supported in Python. See the version which returns a string.

Parameters:

[in]	baseName	a file name to be resolved
[in]	useFrameExt	use frame extension for image file name
[in]	currentFrameExt	specify a frame extension if useFrameExt is used.
[out]	exactName	resolved file name with absolute path
[out]	ReturnStatus	status code

Returns:

• true if the file pathname was successfully resolved.
• false if the pathname could not be resolved.

Status Codes:

• MS::kSuccess Return is valid

bool MRenderUtil::convertPsdFile	(	const MObject &	fileNode,
		MString &	texturePath,
		const bool &	state = false,
		MStatus *	ReturnStatus = NULL
	)			[static]

Internal use only.

This method converts a Psd file texture to an IFF file that can be used by Maya. It writes out the current layer set image the file node. The intermediate image will be either 8 or 16 b.p.c, based on the input psd file.

Python Notes:

This method is not supported in Python. See the version which returns a string.

Parameters:

[in]	fileNode	a file texture node
[out]	texturePath	returns an absolute pathname to the texture file referenced by the node.
[out]	ReturnStatus	status code

Returns:

• true if the image file pathname was successfully resolved and exporting psd file is succeeded.
• false if the pathname could not be resolved or exporting psd file fails.

Status Codes:

• MS::kSuccess Return is valid
• MS::kInvalidObjectType fileNode pointer is not a valid file texture node.
• MS::kInvalidParameter fileNode has empty file name string

bool MRenderUtil::exactImagePlaneFileName	(	const MObject &	imagePlaneNode,
		MString &	texturePath,
		MStatus *	ReturnStatus = NULL
	)			[static]

Attempts to resolve the file texture name specified on an image plane node into an absolute path to an image file on disk. The function applies exactly the same logic that is used by the image plane node internally for resolving the image file path.

Python Notes:

This method is not supported in Python. See the version which returns a string.

Parameters:

[in]	imagePlaneNode	an image plane node
[out]	texturePath	returns an absolute pathname to the texture file referenced by the node.
[out]	ReturnStatus	status code

Returns:

• true if the image file pathname was successfully resolved.
• false if the pathname could not be resolved.

Status Codes:

• MS::kSuccess Return is valid
• MS::kInvalidParameter imagePlaneNode pointer is not a valid image plane node.

MString MRenderUtil::exactFileTextureName	(	const MObject &	fileNode,
		MStatus *	ReturnStatus = NULL
	)			[static]

Attempts to resolve the file texture name specified on a file texture node into an absolute path to an image file on disk. The function applies exactly the same logic that is used by the file texture node internally for resolving the image file path.

Parameters:

[in]	fileNode	a file texture node
[out]	ReturnStatus	status code

Returns:

An absolute pathname to the texture file referenced by the node. If the path cannot be resolved than an empty string is returned

Status Codes:

• MS::kSuccess Return is valid
• MS::kInvalidParameter fileNode pointer is not a valid file texture node.

MString MRenderUtil::exactFileTextureName	(	const MString &	baseName,
		bool	useFrameExt,
		const MString &	currentFrameExt,
		MStatus *	ReturnStatus = NULL
	)			[static]

Attempts to resolve the file name specified into an absolute path to a file on disk. The function applies exactly the same logic that is used by the file texture node internally for resolving the image file path.

Parameters:

[in]	baseName	a file name to be resolved
[in]	useFrameExt	use frame extension for image file name
[in]	currentFrameExt	specify a frame extension if useFrameExt is used.
[out]	ReturnStatus	status code

Returns:

• true if the file pathname was successfully resolved.
• false if the pathname could not be resolved.

Status Codes:

• MS::kSuccess Return is valid

MString MRenderUtil::convertPsdFile	(	const MObject &	fileNode,
		const bool &	state = false,
		MStatus *	ReturnStatus = NULL
	)			[static]

Internal use only.

This method converts a Psd file texture to an IFF file that can be used by Maya. It writes out the current layer set image the file node. The intermediate image will be either 8 or 16 b.p.c, based on the input psd file.

Parameters:

[in]	fileNode	a file texture node
[out]	ReturnStatus	status code

Returns:

• true if the image file pathname was successfully resolved and exporting psd file is succeeded.
• false if the pathname could not be resolved or exporting psd file fails.

Status Codes:

• MS::kSuccess Return is valid
• MS::kInvalidObjectType fileNode pointer is not a valid file texture node.
• MS::kInvalidParameter fileNode has empty file name string

MString MRenderUtil::exactImagePlaneFileName	(	const MObject &	imagePlaneNode,
		MStatus *	ReturnStatus = NULL
	)			[static]

Attempts to resolve the file texture name specified on an image plane node into an absolute path to an image file on disk. The function applies exactly the same logic that is used by the image plane node internally for resolving the image file path.

Parameters:

[in]	imagePlaneNode	an image plane node
[out]	ReturnStatus	status code

Returns:

An absolute pathname to the texture file referenced by the node. If the pathname cannot be resolved, then the returned string is empty

Status Codes:

• MS::kSuccess Return is valid
• MS::kInvalidParameter imagePlaneNode pointer is not a valid image plane node.

bool MRenderUtil::inCurrentRenderLayer	(	const MDagPath &	objectPath,
		MStatus *	ReturnStatus = NULL
	)			[static]

Returns true if the specified path is in the current render layer.

If the object at the end of the DAG path has not been assigned to any layer, then each node in hierarchy from bottom up will be tested whether its contained in the current render layer.

Parameters:

[in]	objectPath	Path of object to test
[out]	ReturnStatus	Status code

Returns:

true if the object is in the current render layer.

Status Codes:

• MS::kSuccess Success
• MS::kFailure Invalid object

MRenderUtil::MRenderPass MRenderUtil::renderPass

(

void

)

[static]

Returns an enumerated type specifying the current pass the Maya renderer is executing.

Returns:

• MRenderUtil::kAll Default case.
• MRenderUtil::kColorOnly Only color information is being calculated.
• MRenderUtil::kShadowOnly Only shadow information is being calculated.
• MRenderUtil::kAmbientOnly Only ambient information is being calculated.
• MRenderUtil::kDiffuseOnly Only diffuse information is being calculated.
• MRenderUtil::kSpecularOnly Only specular information is being calculated.

MString MRenderUtil::mainBeautyPassCustomTokenString

(

)

[static]

Returns the custom token string of the main beauty pass for use by renderers in file naming.

Returns:

The custom token string for the main beauty pass

MString MRenderUtil::mainBeautyPassName

(

)

[static]

Returns the name of the main beauty pass for use by renderers for token substitution.

Returns:

The name of the main beauty pass

float MRenderUtil::diffuseReflectance	(	const void *	lightBlindData,
		const MFloatVector &	lightDirection,
		const MFloatVector &	pointCamera,
		const MFloatVector &	normal,
		bool	lightBackFace,
		MStatus *	ReturnStatus = NULL
	)			[static]

This utility function computes and returns the diffuse or lambertian reflectance for a given light source and surface.

Parameters:

[in]	lightBlindData	The reference to the aLightBlindData attribute of the current light being evaluated
[in]	lightDirection	The direction of the light being evaluated
[in]	pointCamera	The position of the camera
[in]	normal	The surface normal
[in]	lightBackFace	Is the back face being lit, true or false.
[out]	ReturnStatus	Status code

Examples:

phongShader.cpp.

MFloatVector MRenderUtil::maximumSpecularReflection	(	const void *	lightBlindData,
		const MFloatVector &	lightDirection,
		const MFloatVector &	pointCamera,
		const MFloatVector &	normal,
		const MFloatVector &	rayDirection,
		MStatus *	ReturnStatus = NULL
	)			[static]

This utility function computes and returns the vector corresponding to the point on the light source that provides the maximum specular reflection.

Parameters:

[in]	lightBlindData	The reference to the aLightBlindData attribute of the current light being evaluated
[in]	lightDirection	The direction of the light being evaluated
[in]	pointCamera	The position of the camera
[in]	normal	The surface normal
[in]	rayDirection	The direction of the current intersection ray in camera space
[out]	ReturnStatus	Status code

Examples:

phongShader.cpp.

float MRenderUtil::lightAttenuation	(	const void *	lightBlindData,
		const MFloatVector &	pointCamera,
		const MFloatVector &	normal,
		bool	lightBackFace,
		MStatus *	ReturnStatus = NULL
	)			[static]

This utility function computes and returns light attentuation factor of a light. Note that the result of 1 will be returned if the light being evaluated does not support light attentuation.

Parameters:

[in]	lightBlindData	The reference to the aLightBlindData attribute of the current light being evaluated
[in]	pointCamera	The position of the camera
[in]	normal	The surface normal
[in]	lightBackFace	Is the back face being lit, true or false.
[out]	ReturnStatus	Status code

Examples:

phongShader.cpp.

float MRenderUtil::hemisphereCoverage	(	const void *	lightBlindData,
		const MFloatVector &	lightDirection,
		const MFloatVector &	pointCamera,
		const MFloatVector &	rayDirection,
		bool	lightBackFace,
		MStatus *	ReturnStatus = NULL
	)			[static]

This utility function computes and returns the fraction of the light that is transmitted by an object. It is mostly used for translucence and scattering effects.

Parameters:

[in]	lightBlindData	The reference to the aLightBlindData attribute of the current light being evaluated
[in]	lightDirection	The direction of the light being evaluated
[in]	pointCamera	The position of the camera
[in]	rayDirection	The direction of the current intersection ray in camera space
[in]	lightBackFace	Is the back face being lit, true or false.
[out]	ReturnStatus	Status code

void MRenderUtil::sendRenderProgressInfo	(	const MString &	pixFile,
		int	percentageDone
	)			[static]

This utility function sends batch rendering status to Maya

Parameters:

[in]	pixFile	File name of the last rendered batch image
[in]	percentageDone	percentage rendered

void MRenderUtil::getCommonRenderSettings

(

MCommonRenderSettingsData &

mrgData

)

[static]

Fill the set of common render setting values

MStatus MRenderUtil::renderObjectItem	(	const void *	objectId,
		MSelectionList &	item
	)			[static]

Procedure to look up a selection item for a given sample object id. This is only guaranteed to work when software rendering. As multiple processors may be used when software rendering; a critical section should be used to protect multiple threads from simulaneously performing DG evaluation. This includes querying attribute values.

Parameters:

[in]	objectId	The sample object id to look-up
[in]	item	The corresponding item for the id

Returns:

Status Code

• MS::kSuccess Returned if valid
• MS::kInvalidParameter The objectId parameter is NULL
• MS::kNotFound The item was not found

Examples:

cvColorShader.cpp.