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XFcGLTriangleInfoBuffer Class Reference

Triangle info buffer object. More...

List of all members.

Public Member Functions
XFCIMPORT	~XFcGLTriangleInfoBuffer ()
	Destructor.
XFCIMPORT void *	lock ()
	Locks the triangle info buffer.
XFCIMPORT void	unlock ()
	Unlocks the triangle info buffer.
Static Public Member Functions
XFCIMPORT XFcGLTriangleInfoBuffer *	create (UINT32 aTriangleFlags, INT aSizeOfTriangle, INT aNumberOfTriangles)
	Creates an XFcGLTriangleInfoBuffer.
Public Attributes
INT	mInfoSize
	Size of one triangle info unit in bytes.
INT	mNumTriangles
	Number of triangles specified (from construction).
UINT32	mInfoFlags
	Flags (from construction).
INT	mDiffuseColorOffs
	Diffuse color offset (-1 if not specified).
INT	mNormalOffs
	Normal offset (-1 if not specified).
INT	mTexture1Offs
	Texture1 cordinate offset (-1 if not specified).
Protected Member Functions
void	initOffsets (UINT32 aTriangleFlags)
	Calculates the offsets into the data buffer.
Protected Attributes
UINT8 *	mTriangleInfoData
	The actual data.
Friends
class	XFcGLCore
	XFcGLCore needs access to offsets (and is the only class that needs it).

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Detailed Description

Triangle info buffer object.

Triangle info buffers are used to optimize meshes so that duplicate vertices are not needed where, for example, each triangle has its own texture coordinates.

 // An example of legal triangleinfo data:
 #define XFCGLTRIANGLEINFO (XFCGLTR_DIFFUSECOLOR | XFCGLTR_NORMAL | XFCGLTR_TEXTURE1)
 
 // The data in the buffer must be in a specific order:
 // - Diffuse color
 // - Normal vector
 // - Texture coordinates
 
 class XFcGLTriangleInfo
 {
 public:
     UINT32 mDiffuseColor;
     REAL mNX, mNY, mNZ;
     REAL mU[3], mV[3];
 };
 

See also:

XFcGLTriangleInfo

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Constructor & Destructor Documentation

XFCIMPORT XFcGLTriangleInfoBuffer::~XFcGLTriangleInfoBuffer (    )

Destructor.

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Member Function Documentation

XFCIMPORT XFcGLTriangleInfoBuffer* XFcGLTriangleInfoBuffer::create (  UINT32    aTriangleFlags, INT    aSizeOfTriangle, INT    aNumberOfTriangles )  [static]

Creates an XFcGLTriangleInfoBuffer. Parameters: aTriangleFlags  flags describing the triangle info buffer, see XFCGLTRIANGLEFLAGS. aSizeOfTriangle  size of one triangle information in bytes. aNumberOfTriangles  number of triangles in the buffer. Returns: new triangle info buffer object, or NULL if unsuccessful. See also: XFCGLTRIANGLEFLAGS

void XFcGLTriangleInfoBuffer::initOffsets (  UINT32    aTriangleFlags )  [protected]

Calculates the offsets into the data buffer.

XFCIMPORT void* XFcGLTriangleInfoBuffer::lock (    )

Locks the triangle info buffer. Returns: pointer to the triangle info data.

XFCIMPORT void XFcGLTriangleInfoBuffer::unlock (    )

Unlocks the triangle info buffer.

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Friends And Related Function Documentation

friend class XFcGLCore [friend]

XFcGLCore needs access to offsets (and is the only class that needs it).

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Member Data Documentation

INT XFcGLTriangleInfoBuffer::mDiffuseColorOffs

Diffuse color offset (-1 if not specified).

UINT32 XFcGLTriangleInfoBuffer::mInfoFlags

Flags (from construction).

INT XFcGLTriangleInfoBuffer::mInfoSize

Size of one triangle info unit in bytes.

INT XFcGLTriangleInfoBuffer::mNormalOffs

Normal offset (-1 if not specified).

INT XFcGLTriangleInfoBuffer::mNumTriangles

Number of triangles specified (from construction).

INT XFcGLTriangleInfoBuffer::mTexture1Offs

Texture1 cordinate offset (-1 if not specified).

UINT8* XFcGLTriangleInfoBuffer::mTriangleInfoData [protected]

The actual data.

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