MFnLightDataAttribute Class Reference
[OpenMaya - API module for common classes, FunctionSet classes]

#include <MFnLightDataAttribute.h>

Inheritance diagram for MFnLightDataAttribute:

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Collaboration diagram for MFnLightDataAttribute:

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List of all members.

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Detailed Description

Light data attribute function set.

Function object for LightData attributes. A LightData attribute describes a single light source, giving its direction and intensity, as well as specifying whether or not it contributes to the ambient, diffuse, and specular components of the shading model.

Examples:

anisotropicShader.cpp, backfillShader.cpp, lambertShader.cpp, lightShader.cpp, phongShader.cpp, and shadowMatteShader.cpp.

Public Member Functions
virtual MFn::Type	type () const
	Function set type.
virtual	~MFnLightDataAttribute ()
	Destructor.
	MFnLightDataAttribute ()
	Default constructor.
	MFnLightDataAttribute (MObject &object, MStatus *ReturnStatus=NULL)
	Constructor.
MObject	create (const MString &fullName, const MString &briefName, const MObject &direction, const MObject &intensity, const MObject &ambient, const MObject &diffuse, const MObject &specular, const MObject &shadowFraciton, const MObject &preShadowIntensity, const MObject &blindData, MStatus *ReturnStatus=NULL)
MStatus	getDefault (float &defDirectionX, float &defDirectionY, float &defDirectionZ, float &defIntensityR, float &defIntensityG, float &defIntensityB, bool &defAmbient, bool &defDiffuse, bool &defSpecular, float &defShadowFraction, float &defPreShadowIntensity, void *&defBlindData)
MStatus	setDefault (float defDirectionX, float defDirectionY, float defDirectionZ, float defIntensityR, float defIntensityG, float defIntensityB, bool defAmbient, bool defDiffuse, bool defSpecular, float defShadowFraction, float defPreShadowIntensity, void *defBlindData)
MObject	child (unsigned int index, MStatus *returnStatus)
	MFnLightDataAttribute (const MObject &object, MStatus *ReturnStatus=NULL)
	Constructor.
Protected Member Functions
virtual const char *	className () const
	Class name.

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Constructor & Destructor Documentation

MFnLightDataAttribute::MFnLightDataAttribute	(	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

MFnLightDataAttribute::MFnLightDataAttribute	(	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

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Member Function Documentation

MFn::Type MFnLightDataAttribute::type

(

)

const [virtual]

Function set type.

Return the class type : MFn::kLightDataAttribute

Reimplemented from MFnAttribute.

const char * MFnLightDataAttribute::className

(

)

const [protected, virtual]

Class name.

Return the class name : "MFnLightDataAttribute"

Reimplemented from MFnAttribute.

MObject MFnLightDataAttribute::create	(	const MString &	fullName,
		const MString &	briefName,
		const MObject &	direction,
		const MObject &	intensity,
		const MObject &	ambient,
		const MObject &	diffuse,
		const MObject &	specular,
		const MObject &	shadowFraction,
		const MObject &	preShadowIntensity,
		const MObject &	blindData,
		MStatus *	ReturnStatus = NULL
	)

Creates a LightData attribute object.

The create method needs to be called on a per node basis. That means if you want to create and add the same attribute to multiple nodes, you need to call the create method for each node to get a unique MObject back. If you call create just once and add the attribute to multiple nodes, Maya will encounter a fatal error.

Parameters:

[in]	fullName	The full name of the attribute
[in]	briefName	The brief name of the attribute
[in]	direction	The 3Float child attribute that will represent the light direction
[in]	intensity	The 3Float child attibute that will represent the light intensity
[in]	ambient	The Boolean child attribute that specifies whether or not the light contributes to the ambient component of the shading model
[in]	diffuse	The Boolean child attribute that specifies whether or not the light contributes to the diffuse component of the shading model
[in]	specular	The Boolean child attribute that specifies whether or not the light contributes to the specular component of the shading model
[in]	shadowFraction	The float attribute that will represent the percentage of the light that is in shadow with respect to the intersection point. 0 means the light is total visible to the intersection point and 1 means the light is total invisible to the intersection point.
[in]	preShadowIntensity	The float attribute that will represetnt the light intensity without shadow consideration
[in]	blindData	Attribute to hold the light's blind data.
[out]	ReturnStatus	Status code for the operation.

Returns:

The newly created LightData attribute object.

Status Codes:

• MS::kInvalidParameter One of the specified child attribute pointers was NULL or was of the wrong type
• MS::kSuccess The attribute object was successfully created.

Examples:

anisotropicShader.cpp, backfillShader.cpp, lambertShader.cpp, lightShader.cpp, phongShader.cpp, and shadowMatteShader.cpp.

MStatus MFnLightDataAttribute::getDefault	(	float &	defDirectionX,
		float &	defDirectionY,
		float &	defDirectionZ,
		float &	defIntensityR,
		float &	defIntensityG,
		float &	defIntensityB,
		bool &	defAmbient,
		bool &	defDiffuse,
		bool &	defSpecular,
		float &	defShadowFraction,
		float &	defPreShadowIntensity,
		void *&	defBlindData
	)

Gets the default value for the attribute.

Parameters:

[out]	defDirectionX	returns the default x component of light direction
[out]	defDirectionY	returns the default y component of light direction
[out]	defDirectionZ	returns the default z component of light direction
[out]	defIntensityR	returns the default red component of light intensity
[out]	defIntensityG	returns the default green component of light intensity
[out]	defIntensityB	returns the default blue component of light intensity
[out]	defAmbient	returns the default ambient flag
[out]	defDiffuse	returns the default diffuse flag
[out]	defSpecular	returns the default specular flag
[out]	defShadowFraction	returns the default shadow fraction flag
[out]	defPreShadowIntensity	returns the default pre shadow intensity flag
[out]	defBlindData	returns the default blind data

Returns:

Status flag

Status Codes:

• MS::kSuccess The defaults were successfully queried

MStatus MFnLightDataAttribute::setDefault	(	float	defDirectionX,
		float	defDirectionY,
		float	defDirectionZ,
		float	defIntensityR,
		float	defIntensityG,
		float	defIntensityB,
		bool	defAmbient,
		bool	defDiffuse,
		bool	defSpecular,
		float	defShadowFraction,
		float	defPreShadowIntensity,
		void *	defBlindData
	)

Sets the default value for the attribute.

Parameters:

[in]	defDirectionX	Default x component of light direction
[in]	defDirectionY	Default y component of light direction
[in]	defDirectionZ	Default z component of light direction
[in]	defIntensityR	Default red component of light intensity
[in]	defIntensityG	Default green component of light intensity
[in]	defIntensityB	Default blue component of light intensity
[in]	defAmbient	Default ambient flag
[in]	defDiffuse	Default diffuse flag
[in]	defSpecular	Default specular flag
[in]	defShadowFraction	Default shadow fraction flag
[in]	defPreShadowIntensity	Default pre shadow intensity flag
[in]	defBlindData	Default blind data

Returns:

Status flag

Status Codes:

• MS::kSuccess The defaults were successfully set

Examples:

anisotropicShader.cpp, backfillShader.cpp, lambertShader.cpp, lightShader.cpp, phongShader.cpp, and shadowMatteShader.cpp.

MObject MFnLightDataAttribute::child	(	unsigned int	index,
		MStatus *	ReturnStatus
	)

Gets a pointer to one of the child attributes.

Parameters:

[in]	index	Specifies which child is desired: 0 = direction 1 = intensity 2 = ambient flag 3 = diffuse flag 4 = specular flag 5 = shadow fraction flag 6 = pre shadow intensity flag 7 = blind data flag
[out]	ReturnStatus	Status code for the operation

Returns:

A pointer to the desired child attribute

Status Codes:

• MS::kSuccess The child was successfully retrieved
• MS::kFailure The child was not successfully retrieved