Detailed Description

MIndexBufferDescriptor describes an indexing scheme.

This class represents a description of an indexing scheme. It provides the indexing type (including custom named types), primitive type, primitive stride (for use with patch primitives), and component information.

#include <MHWGeometry.h>

List of all members.

Public Member Functions
	MIndexBufferDescriptor ()
	Constructor.
	MIndexBufferDescriptor (MIndexBufferDescriptor::IndexType type, MString &name, MGeometry::Primitive primitive, unsigned int primitiveStride=0, MObject component=MObject::kNullObj, MGeometry::DataType dataType=MGeometry::kUnsignedInt32)
	Constructor with arguments.
	~MIndexBufferDescriptor ()
	Destructor.
MString	name () const
	Get the name used to describe the type when the type() returns kCustom.
void	setName (MString &val)
	Set the name used to describe the type when the type() is set to kCustom.
MIndexBufferDescriptor::IndexType	indexType () const
	Get the indexing type describing what the buffer is used for.
void	setIndexType (MIndexBufferDescriptor::IndexType val)
	Set the indexing type describing what the buffer is used for.
MGeometry::Primitive	primitive () const
	Get the primitive describing the input layout for each drawable.
void	setPrimitive (MGeometry::Primitive val)
	Set the primitive describing the input layout for each drawable.
unsigned int	primitiveStride () const
	Get the number of points per primitive.
void	setPrimitiveStride (unsigned int id)
	Set the number of control points used for patch primitives.
MObject	component () const
	Get the components associated with the index buffer.
void	setComponent (MObject component)
	Set the components to use when building the index buffer.
MGeometry::DataType	dataType () const
	Get the type of data expected to be in the index buffer.
void	dataType (MGeometry::DataType dataType)
	Set the type of data expected to be in the index buffer.

Constructor & Destructor Documentation

MIndexBufferDescriptor	(	MIndexBufferDescriptor::IndexType	type,
		MString &	name,
		MGeometry::Primitive	primitive,
		unsigned int	primitiveStride = `0`,
		MObject	component = `MObject::kNullObj`,
		MGeometry::DataType	dataType = `MGeometry::kUnsignedInt32`
	)

Constructor with arguments.

Parameters:

[in]	type	The indexing type describing what the buffer is used for.
[in]	name	Used to describe the type when the type argument is kCustom.
[in]	primitive	A description of the input layout for each drawable.
[in]	primitiveStride	The number of control points per patch when the primitive type is kPatch.
[in]	component	The components to use when building the index buffer. If this is MObject::kNullObj the index buffer represents the whole object.
[in]	dataType	The data type the buffer will hold.

Member Function Documentation

MString name ( ) const

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Get the name used to describe the type when the type() returns kCustom.

Returns:: The name to use as the custom type.

void setName ( MString & val )

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Set the name used to describe the type when the type() is set to kCustom.

Parameters:

[in] val The name to use as the custom type.

MIndexBufferDescriptor::IndexType indexType ( ) const

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Get the indexing type describing what the buffer is used for.

Returns:: The indexing type describing what the buffer is used for.

void setIndexType ( MIndexBufferDescriptor::IndexType val )

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Set the indexing type describing what the buffer is used for.

Parameters:

[in] val The indexing type describing what the buffer is used for.

MGeometry::Primitive primitive ( ) const

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Get the primitive describing the input layout for each drawable.

Returns:: The primitive describing the input layout for each drawable.

void setPrimitive ( MGeometry::Primitive val )

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Set the primitive describing the input layout for each drawable.

Parameters:

[in] val The primitive describing the input layout for each drawable.

unsigned int primitiveStride ( ) const

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Get the number of points per primitive.

Returns:: The stride of the primitive;

void setPrimitiveStride ( unsigned int stride )

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Set the number of control points used for patch primitives.

Setting this value is only meaningful when primitive() is set to kPatch.

Parameters:

[in] stride The stride of the patch primitive;

MObject component ( ) const

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Get the components associated with the index buffer.

Note that only one type of component (edge, face, etc) can be associated with a given index buffer.

if ( component.hasFn(MFn::kSingleIndexedComponent) ) { MFnSingleIndexedComponent fnVtxComp( component ); int len = fnVtxComp.elementCount(); for ( int i = 0; i < len; i++ ) { int idx = fnVtxComp.element(i); } }