//========== Copyright (c) Valve Corporation, All rights reserved. ==========//

#include "common_fog_ps_fxc.h"

#include "common_ps_fxc.h"
#include "shader_constant_register_map.h"

sampler EnvmapSampler		: register( s0 );

const float4 g_FogParams				: register( PSREG_FOG_PARAMS );
const float4 g_EyePos_SpecExponent		: register( PSREG_EYEPOS_SPEC_EXPONENT );

struct PS_INPUT
{
	float3 eyeToVertVector			: TEXCOORD0;
	float4 vertexColor				: COLOR;
	
	float4 worldPos_projPosZ		: TEXCOORD7;		// Necessary for pixel fog
};

float4 main( PS_INPUT i ) : COLOR
{
	float4 color;
	color.xyz = ( float3 )( ENV_MAP_SCALE * texCUBE( EnvmapSampler, i.eyeToVertVector ) );
	color.a = 1.0f;
	color *= i.vertexColor;
	
	float fogFactor = CalcPixelFogFactor( PIXELFOGTYPE, g_FogParams, g_EyePos_SpecExponent.xyz, i.worldPos_projPosZ.xyz, i.worldPos_projPosZ.w );
	return FinalOutput( color, fogFactor, PIXELFOGTYPE, TONEMAP_SCALE_LINEAR );
}