interpolation.h File Reference

#include "srp/shaders.h"
#include "srp/vec.h"

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Functions
void	interpolateDepthAndWTriangle (SRPVertexShaderOut *vertices, const float *weights, const float *invW, const SRPShaderProgram *sp, float *depth, float *reciprocalInterpolatedInvW)
void	interpolateDepthAndWLine (SRPVertexShaderOut *vertices, const float *weights, const float *invW, const SRPShaderProgram *sp, float *depth, float *reciprocalInterpolatedInvW)
void	interpolateAttributes (SRPVertexShaderOut *vertices, size_t nVertices, const float *weights, const float *invW, float reciprocalInterpolatedInvW, const SRPShaderProgram *sp, SRPInterpolated *pOutput)

Detailed Description

Interpolation-related functions

Function Documentation

interpolateAttributes()

void interpolateAttributes	(	SRPVertexShaderOut *	vertices,
		size_t	nVertices,
		const float *	weights,
		const float *	invW,
		float	reciprocalInterpolatedInvW,
		const SRPShaderProgram *	sp,
		SRPInterpolated *	pOutput
	)

Interpolate the attributes inside the primitive

Parameters

[in]	vertices	Array of vertices
[in]	nVertices	Amount of passed vertices
[in]	weights	Array of barycentric coordinates
[in]	invW	Array of inverseW values for each corresponding vertex
[in]	reciprocalInterpolatedInvW	The reciprocal of interpolated inverse W_clip
[in]	sp	The SRPShaderProgram being used
[out]	pOutput	Interpolated vertex attributes

interpolateDepthAndWLine()

void interpolateDepthAndWLine	(	SRPVertexShaderOut *	vertices,
		const float *	weights,
		const float *	invW,
		const SRPShaderProgram *	sp,
		float *	depth,
		float *	reciprocalInterpolatedInvW
	)

Interpolate the depth and inverse W values inside the line

Parameters

[in]	vertices	Array of vertices
[in]	weights	Array of barycentric coordinates
[in]	invW	Array of inverseW values for each corresponding vertex
[in]	sp	The SRPShaderProgram being used
[out]	depth	Where interpolated depth will be stored
[out]	reciprocalInterpolatedInvW	Where the reciprocal of interpolated inverse W_clip will be stored