MFnVolumeLight Class Reference

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Detailed Description

Manage volume Light dependency Nodes.

MFnVolumeLight facilitates creation and manipulation of dependency graph nodes representing voume lights.

Examples:

volumeLightCmd.cpp.

#include <MFnVolumeLight.h>

Inheritance diagram for MFnVolumeLight:

List of all members.

Public Types
enum	MLightShape { kBoxVolume, kSphereVolume, kCylinderVolume, kConeVolume }
	Available shapes for a volume light. More...
enum	MLightDirection { kOutward, kInward, kDownAxis }
	Direction that light travels. More...
Public Member Functions
virtual MFn::Type	type () const
	Function set type.
virtual	~MFnVolumeLight ()
	Destructor.
	MFnVolumeLight ()
	Default constructor.
	MFnVolumeLight (MObject &object, MStatus *ReturnStatus=NULL)
	Constructor.
	MFnVolumeLight (const MDagPath &object, MStatus *ret=NULL)
	Constructor.
MObject	create (bool UIvisible=true, MStatus *ReturnStatus=NULL)
	Creates a new volume light dependency graph node and adds it to the dependency graph.
MObject	create (const MObject &parent, bool UIvisible=true, bool wantTransform=false, MStatus *ReturnStatus=NULL)
	Creates a new volume light dependency graph node and adds it to the dependency graph.
MFnVolumeLight::MLightShape	lightShape (MStatus *ReturnStatus=NULL) const
	Retrieves the "lightShape" attribute of the light.
MStatus	setLightShape (const MFnVolumeLight::MLightShape &light_shape)
	Sets the value of the "lightShape" attribute of a volume light node.
MFnVolumeLight::MLightDirection	volumeLightDirection (MStatus *ReturnStatus=NULL) const
	Retrieves the value of the "volumeLightDirection" attribute.
MStatus	setVolumeLightDirection (const MFnVolumeLight::MLightDirection &volume_light_direction)
	Sets the value of the "volumeLightDirection" attribute of a volume light node.
float	arc (MStatus *ReturnStatus=NULL) const
	Retrieves the value of the "arc" attribute.
MStatus	setArc (const float &arc)
	Sets the value of the "arc" attribute of a volume light node.
float	coneEndRadius (MStatus *ReturnStatus=NULL) const
	Retrieves the value of the "coneEndRadius" attribute.
MStatus	setConeEndRadius (const float &cone_end_radius)
	Sets the value of the "coneEndRadius" attribute of a volume light node.
bool	emitAmbient (MStatus *ReturnStatus=NULL) const
	Retrieves the value of the "emitAmbient" attribute.
MStatus	setEmitAmbient (const bool &emit_ambient)
	Sets the value of the "emitAmbient" attribute of a volume light node.
MRampAttribute	colorRamp (MStatus *ReturnStatus=NULL) const
	Retrieves the "colorRamp" attribute.
MRampAttribute	penumbraRamp (MStatus *ReturnStatus=NULL) const
	Retrieves the "penumbraRamp" attribute.
float	shadowAngle (MStatus *ReturnStatus=NULL) const
	Retrieves the value of the "shadowAngle" attribute of a volume light node.
MStatus	setShadowAngle (const float &shadow_angle)
	Sets the value of the "shadowAngle" attribute of a volume light node.
	MFnVolumeLight (const MObject &object, MStatus *ret=NULL)
	Constructor.
MObject	create (const MObject &parent, bool UIvisible=true, MStatus *ReturnStatus=NULL)
	NO SCRIPT SUPPORT.
Protected Member Functions
virtual const char *	className () const
	Class name.

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Member Enumeration Documentation

enum MLightShape

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Available shapes for a volume light.

Enumerator:

kBoxVolume	Search for all occurrences
kSphereVolume	Search for all occurrences
kCylinderVolume	Search for all occurrences
kConeVolume	Search for all occurrences

enum MLightDirection

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Direction that light travels.

Enumerator:

kOutward	Light travels outwared from the center of a box- or sphere-shaped volume, and outward from the axis of a cylinder- or cone-shaped volume. Search for all occurrences
kInward	Light travels inward toward the center of a box- or sphere-shaped volume, and inward toward the axis of a cylinder- or cone-shaped volume. Search for all occurrences
kDownAxis	Light travels down the axis, like a directional light pointing in the negative Y direction. Search for all occurrences

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Constructor & Destructor Documentation

~MFnVolumeLight

(

)

[virtual]

Destructor.

The class destructor.

MFnVolumeLight	(	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

MFnVolumeLight	(	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

MFnVolumeLight	(	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 type

(

)

const [virtual]

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Function set type.

Return the class type : MFn::kVolumeLight.

Reimplemented from MFnPointLight.

const char * className

(

)

const [protected, virtual]

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Class name.

Return the class name : "MFnVolumeLight".

Reimplemented from MFnPointLight.

MObject create	(	bool	UIvisible = true,
		MStatus *	ReturnStatus = NULL
	)

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Creates a new volume light dependency graph node and adds it to the dependency graph.

If the UIvisible parameter is true, the new node will be connected to the light classification node (which allows the UI to recognize the node as a light) and added to the default light list. If UIvisible is false, the node will be created in isolation.

The light node is added to the current model, under a new transformation.

Parameters:

[in]	UIvisible	determines whether or not to connect the new node to the light classification node and add it to the default light list.
[out]	ReturnStatus	return status

Returns:

MObject representing the new dependency node.

Status Codes:

• MS::kSuccess operation successful
• MS::kInsufficientMemory ran out of memory
• MS::kNoModelActive no model is currently active
• MS::kLicenseFailure application not licensed for attempted operation
• MS::kFailure the new node could not be added to the model, or the function set could not be properly initialized with the new object.

Reimplemented from MFnPointLight.

Examples:

volumeLightCmd.cpp.

MObject create	(	const MObject &	parent,
		bool	UIvisible = true,
		bool	wantTransform = false,
		MStatus *	ReturnStatus = NULL
	)

Search for all occurrences

Creates a new volume light dependency graph node and adds it to the dependency graph.

If the UIvisible parameter is true, the new node will be connected to the light classification node (which allows the UI to recognize the node as a light) and added to the default light list. If UIvisible is false, the node will be created in isolation.

If wantTransform parameter is false ( which is by default ), the new shape node is created under the specified parent and no transform node is created. If the specified parent is null, then no shape node will be created.

The light node is added to the current model, under the specified parent.

Parameters:

[in]	parent	the node under which the new light and its transform will be added.
[in]	wantTransform	Boolean to indicate whether the transform node is needed or not, which is 'false' by default.
[in]	UIvisible	determines whether or not to connect the new node to the light classification node and add it to the default light list.
[out]	ReturnStatus	return status

Returns:

MObject representing the new dependency node.

Status Codes:

• MS::kSuccess operation successful
• MS::kInsufficientMemory ran out of memory
• MS::kNoModelActive no model is currently active
• MS::kLicenseFailure application not licensed for attempted operation
• MS::kFailure the new node could not be added to the model, or the function set could not be properly initialized with the new object.

Reimplemented from MFnPointLight.

MFnVolumeLight::MLightShape lightShape

(

MStatus *

ReturnStatus = NULL

)

const

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Retrieves the "lightShape" attribute of the light.

The shape can be one of the following.

• MFnVolumeLight::kBoxVolume
• MFnVolumeLight::kCylinderVolume
• MFnVolumeLight::kSphereVolume
• MFnVolumeLight::kConeVolume

Parameters:

[out]

ReturnStatus

return status

Returns:

The value of the "lightShape" attribute of the volume light node.

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object.

Examples:

volumeLightCmd.cpp.

MStatus setLightShape

(

const MFnVolumeLight::MLightShape &

light_shape

)

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Sets the value of the "lightShape" attribute of a volume light node.

The shape can be one of the following:

• MFnVolumeLight::kBoxVolume
• MFnVolumeLight::kCylinderVolume
• MFnVolumeLight::kSphereVolume
• MFnVolumeLight::kConeVolume

Parameters:

[in]

light_shape

value to which the attribute will be set.

Returns:

Return status

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object,

Examples:

volumeLightCmd.cpp.

MFnVolumeLight::MLightDirection volumeLightDirection

(

MStatus *

ReturnStatus = NULL

)

const

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Retrieves the value of the "volumeLightDirection" attribute.

The volumeLightDirection attribute determines the direction of the light within the volume. Outward has light moving away from the center of a Box or Sphere and away from the central axis of a Cylinder or Cone. Inward is the reverse of the direction. One can light from the outside of a sphere going in. Up Axis is like a directional light pointing in the positive y direction. Down axis points in the negative y direction. Note that Inward will not always shadow in a desirable fashion. The volumeLightDirection attribute can be one of the following:

• MFnVolumeLight::kInward
• MFnVolumeLight::kOutward
• MFnVolumeLight::kDownAxis

Parameters:

[out]

ReturnStatus

return status

Returns:

The value of the "lightDirection" attribute of the volume light node.

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object.

Examples:

volumeLightCmd.cpp.

MStatus setVolumeLightDirection

(

const MFnVolumeLight::MLightDirection &

volume_light_direction

)

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Sets the value of the "volumeLightDirection" attribute of a volume light node.

The shape can be one of the following.

• MFnVolumeLight::kBoxVolume
• MFnVolumeLight::kCylinderVolume
• MFnVolumeLight::kSphereVolume
• MFnVolumeLight::kConeVolume

Parameters:

[in]

volume_light_direction

value to which the attribute will be set.

Returns:

Return status

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object,

Examples:

volumeLightCmd.cpp.

float arc

(

MStatus *

ReturnStatus = NULL

)

const

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Retrieves the value of the "arc" attribute.

The arc is an angular slice of the light about the y axis. The value can range from 0 to 360 degrees.

Parameters:

[out]

ReturnStatus

return status

Returns:

The value of the "arc" attribute of the volume light node.

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object.

Examples:

volumeLightCmd.cpp.

MStatus setArc

(

const float &

arc

)

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Sets the value of the "arc" attribute of a volume light node.

Parameters:

[in]

arc

value to which the attribute will be set.

Returns:

Return status

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object,

Examples:

volumeLightCmd.cpp.

float coneEndRadius

(

MStatus *

ReturnStatus = NULL

)

const

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Retrieves the value of the "coneEndRadius" attribute.

The coneEndRadius attribute determines the relative size of the one end of the cone. At a value of 1.0 it is a cylinder, while at 0 it is a cone.

Parameters:

[out]

ReturnStatus

return status

Returns:

The value of the "coneEndRadius" attribute of the volume light node.

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object.

Examples:

volumeLightCmd.cpp.

MStatus setConeEndRadius

(

const float &

cone_end_radius

)

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Sets the value of the "coneEndRadius" attribute of a volume light node.

Parameters:

[in]

cone_end_radius

value to which the attribute will be set.

Returns:

Return status

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object,

Examples:

volumeLightCmd.cpp.

bool emitAmbient

(

MStatus *

ReturnStatus = NULL

)

const

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Retrieves the value of the "emitAmbient" attribute.

If true, then light affects surfaces in a non directional fashion. When combined with Emit Diffuse the lighting at a surface will be half applied using the surface/light angle, and half in a nondirectional fashion. If Emit Diffuse is off then the light will be totally omnidirectional.

Parameters:

[out]

ReturnStatus

return status

Returns:

The value of the "emitAmbient" attribute of the volume light node.

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object.

Examples:

volumeLightCmd.cpp.

MStatus setEmitAmbient

(

const bool &

emit_ambient

)

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Sets the value of the "emitAmbient" attribute of a volume light node.

Parameters:

[in]

emit_ambient

value to which the attribute will be set.

Returns:

Return status

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object,

Examples:

volumeLightCmd.cpp.

MRampAttribute colorRamp

(

MStatus *

ReturnStatus = NULL

)

const

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Retrieves the "colorRamp" attribute.

Parameters:

[out]

ReturnStatus

return status

Returns:

The color ramp attribute

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object.

Examples:

volumeLightCmd.cpp.

MRampAttribute penumbraRamp

(

MStatus *

ReturnStatus = NULL

)

const

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Retrieves the "penumbraRamp" attribute.

Parameters:

[out]

ReturnStatus

return status

Returns:

The penumbra ramp attribute

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object.

Examples:

volumeLightCmd.cpp.

float shadowAngle

(

MStatus *

ReturnStatus = NULL

)

const

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Retrieves the value of the "shadowAngle" attribute of a volume light node.

This attribute represents an angular divergence from the direction vector of the light used to calculate soft shadows. It's enabled only if the volume light direction is kDownAxis.

Parameters:

[out]

ReturnStatus

return status

Returns:

The value of the "shadowAngle" attribute of the light node.

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object.

MStatus setShadowAngle

(

const float &

shadow_angle

)

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Sets the value of the "shadowAngle" attribute of a volume light node.

It's enabled only if the volume light direction is kDownAxis.

Parameters:

[in]

shadow_angle

value to which the attribute will be set.

Returns:

Return status

Status Codes:

• MS::kSuccess operation successful
• MS::kFailure function set does not have a valid object.

MObject create	(	const MObject &	parent,
		bool	UIvisible = true,
		MStatus *	ReturnStatus = NULL
	)

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NO SCRIPT SUPPORT.

Creates a new volume light dependency graph node and adds it to the dependency graph.

If the UIvisible parameter is true, the new node will be connected to the light classification node (which allows the UI to recognize the node as a light) and added to the default light list. If UIvisible is false, the node will be created in isolation.

The light node is added to the current model, under a new transformation. The transformation is added to the current model under the specified parent.

Parameters:

[in]	parent	the node under which the new light and its transform will be added.
[in]	UIvisible	determines whether or not to connect the new node to the light classification node and add it to the default light list.
[out]	ReturnStatus	return status

Returns:

MObject representing the new dependency node.

Status Codes:

• MS::kSuccess operation successful
• MS::kInsufficientMemory ran out of memory
• MS::kNoModelActive no model is currently active
• MS::kLicenseFailure application not licensed for attempted operation
• MS::kFailure the new node could not be added to the model, or the function set could not be properly initialized with the new object.

Reimplemented from MFnPointLight.