topology.h File Reference

#include "core/buffer_p.h"

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Functions
size_t	computeTriangleCount (size_t vertexCount, SRPPrimitive prim)
void	resolveTriangleTopology (size_t base, size_t rawTriIdx, SRPPrimitive prim, size_t *out)
size_t	computeLineCount (size_t vertexCount, SRPPrimitive prim)
void	resolveLineTopology (size_t base, size_t rawLineIdx, SRPPrimitive prim, size_t vertexCount, size_t *out)

Detailed Description

Topology-related functions

Function Documentation

computeLineCount()

size_t computeLineCount	(	size_t	vertexCount,
		SRPPrimitive	prim
	)

Deduce the number of lines to assemble based on the number of vertices and primitive type

Parameters

[in]	vertexCount	Number of vertices
[in]	prim	Primitive type

Returns

Number of lines that should be assembled

resolveLineTopology()

void resolveLineTopology	(	size_t	base,
		size_t	rawLineIdx,
		SRPPrimitive	prim,
		size_t	vertexCount,
		size_t *	out
	)

Determine the stream indices for a line based on its type

Parameters

[in]	base	Base stream index
[in]	rawLineIdx	Index of the primitive to assemble, starting from 0, including culled/skipped lines
[in]	prim	Primitive type
[in]	vertexCount	The total amount of stream vertices for this draw call
[out]	out	Array of size 2 to store the resulting stream indices

resolveTriangleTopology()

void resolveTriangleTopology	(	size_t	base,
		size_t	rawTriIdx,
		SRPPrimitive	prim,
		size_t *	out
	)

Determine the stream indices for a triangle based on its type

Parameters

[in]	base	Base stream index
[in]	rawTriIdx	Index of the primitive to assemble, starting from 0, including culled triangles
[in]	prim	Primitive type
[out]	out	Array of size 3 to store the resulting stream indices