worldvertextransition_ps20.fxc

hl2 source code. Do not use it illegal.

//	STATIC: "MACROS"			"0..1"

#include "common_ps_fxc.h"

// CENTROID: TEXCOORD2

sampler BaseSampler	: register( s0 );
sampler BaseSampler2: register( s1 );
sampler LightmapSampler: register( s2 );
sampler LightmapAlphaSampler: register( s3 );
sampler MacrosSampler: register( s4 );

struct PS_INPUT
{
	float2 baseCoord				: TEXCOORD0;
	float2 baseCoord2				: TEXCOORD1;
	float2 lightmapCoord			: TEXCOORD2;
	float2 macrosCoord				: TEXCOORD3;
};

float4 main( PS_INPUT i ) : COLOR
{
	bool bMacros = MACROS ? true : false;

	float4 base = tex2D( BaseSampler, i.baseCoord );
	base.a = AvgColor( base.rgb );
	float4 base2 = tex2D( BaseSampler2, i.baseCoord2 );
	base2.a = AvgColor( base2.rgb );

	float4 lightmap = tex2D( LightmapSampler, i.lightmapCoord );
	float4 blendFactor = tex2D( LightmapAlphaSampler, i.lightmapCoord );

	float4 color = 2.0f * lightmap * lerp( base2, base, blendFactor.a );
	if( bMacros )
	{
		float4 macros = tex2D( MacrosSampler, i.macrosCoord );

		// Not sure what to do with macro alpha
		color.rgb *= 2.0f * lerp( macros.a, macros.b, blendFactor.a );
	}

	return color;
}