BIAS::glfElementBuffer Class Reference

An element buffer contains vertex indices that form primitives. More...

#include <OpenGLFramework/Base/glfElementBuffer.hh>

Public Member Functions
void	Create (int numIndices, GLenum type, GLenum mode, const void *indices)
	Creates the element buffer for the given number of indices. More...
void	Create (const std::vector< unsigned char > &indices, GLenum mode)
	Secure convenience wrapper for glfElementBuffer::Create method with type = GL_UNSIGNED_BYTE. More...
void	Create (const std::vector< unsigned short > &indices, GLenum mode)
	Secure convenience wrapper for glfElementBuffer::Create method with type = GL_UNSIGNED_SHORT. More...
void	Create (const std::vector< unsigned int > &indices, GLenum mode)
	Secure convenience wrapper for glfElementBuffer::Create method with type = GL_UNSIGNED_INT;. More...
void	Draw (int first=0, int count=-1) const
	Draw elements from the buffer. More...
	glfElementBuffer ()
void *	Map ()
	Maps the element buffer to system memory, so it can be modified after creation. More...
void	Unmap ()
	Unmaps the element buffer. More...
	~glfElementBuffer ()

Detailed Description

An element buffer contains vertex indices that form primitives.

With element buffers, a single vertex can be used by multiple primitives, although it is only stored once in the vertex buffer.

Author

jkollmann

Examples:

ExampleRenderingContext.cpp.

Definition at line 40 of file glfElementBuffer.hh.

Constructor & Destructor Documentation

glfElementBuffer::glfElementBuffer

(

)

Definition at line 31 of file glfElementBuffer.cpp.

glfElementBuffer::~glfElementBuffer

(

)

Definition at line 40 of file glfElementBuffer.cpp.

Member Function Documentation

void glfElementBuffer::Create	(	int	numIndices,
		GLenum	type,
		GLenum	mode,
		const void *	indices
	)

Creates the element buffer for the given number of indices.

Parameters

numIndices	Number of indices to fit into the buffer.
type	Data type of indices. May be GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, or GL_UNSIGNED_INT.
mode	Primitive type. May be GL_POINTS, GL_LINE_STRIP, GL_LINE_LOOP, GL_LINES, GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_TRIANGLES, GL_QUAD_STRIP, GL_QUADS, or GL_POLYGON.
indices	Pointer to vertex indices.

Examples:

ExampleRenderingContext.cpp.

Definition at line 58 of file glfElementBuffer.cpp.

Referenced by BIAS::Primitives::AddRelativeQuadPatches(), BIAS::Primitives::AddRelativeQuadPatchOverImageLine(), BIAS::Primitives::LocalNormalizedPointCloud(), BIAS::Primitives::LocalNormalizedTriangleMesh(), BIAS::Primitives::LocalNormalizedTriangleStrip(), BIAS::Primitives::LocalPerspectivePatches(), BIAS::Primitives::LocalPerspectivePatchOverLine(), BIAS::Primitives::LocalPerspectiveQuad(), BIAS::Primitives::PlainQuad2DWithTexture2D(), and BIAS::PMDWarp::SetupDefaultPrimitiveRendering_().

void BIAS::glfElementBuffer::Create ( const std::vector< unsigned char > &  indices, GLenum  mode  )

inline

Secure convenience wrapper for glfElementBuffer::Create method with type = GL_UNSIGNED_BYTE.

Definition at line 61 of file glfElementBuffer.hh.

void BIAS::glfElementBuffer::Create ( const std::vector< unsigned short > &  indices, GLenum  mode  )

inline

Secure convenience wrapper for glfElementBuffer::Create method with type = GL_UNSIGNED_SHORT.

Definition at line 69 of file glfElementBuffer.hh.

void BIAS::glfElementBuffer::Create ( const std::vector< unsigned int > &  indices, GLenum  mode  )

inline

Secure convenience wrapper for glfElementBuffer::Create method with type = GL_UNSIGNED_INT;.

Definition at line 77 of file glfElementBuffer.hh.

void glfElementBuffer::Draw	(	int	first = 0,
		int	count = -1
	)		const

Draw elements from the buffer.

Definition at line 138 of file glfElementBuffer.cpp.

Referenced by BIAS::glfBatch::Draw().

void * glfElementBuffer::Map

(

)

Maps the element buffer to system memory, so it can be modified after creation.

Attention

Access is write-only!

Definition at line 109 of file glfElementBuffer.cpp.

void glfElementBuffer::Unmap

(

)

Unmaps the element buffer.

Must be called after glfElementBuffer::Map and before the element buffer is used for rendering again.

Definition at line 123 of file glfElementBuffer.cpp.

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The documentation for this class was generated from the following files:

• OpenGLFramework/Base/glfElementBuffer.hh
• OpenGLFramework/Base/glfElementBuffer.cpp