www.pudn.com > promptshaderey.zip > sky.fx

 
// Skydome rendering. 
// 
// Outputs color into RT0, nothing into RT1. 
// We don't want to edge-detect or hatch the skydome, hence nothing into RT1, 
// RT1 gets cleared in code to max Z and normal that coincides with light. 
// Sky is affected by atmospheric in-scattering only. 
// 
// Versions: vs1.1, ps1.1 
 
#include "_shared.fx" 
#include "_library.fx" 
 
// -------------------------------------------------------------------------- 
//  vertex shader 
 
struct VS_OUTPUT { 
	float4 pos		: POSITION; 
	float4 color	: COLOR0; 
}; 
 
VS_OUTPUT vsMain ( 
	float4	pos : POSITION ) 
{ 
    VS_OUTPUT o; 
	o.pos = mul( pos, mViewProj ); 
 
	// scattering 
	float3 extinct, inscatter; 
	float3 viewDir = normalize( pos - vEye ); 
	float distance = mul( pos, mView ).z; 
	gScattering( 
		distance, viewDir, vLightDir, 
		vScatterBetaR, vScatterBetaM, vScatterBetaSum, vScatterBetaR_, vScatterBetaM_, 
		vScatterSunColorDivBetaSum, vScatterHGg, 
		extinct, inscatter 
	); 
	o.color = float4( inscatter * fScatterInscatMult, 1 ); 
	return o; 
} 
 
// -------------------------------------------------------------------------- 
//  pixel shader 
 
struct PS_INPUT { 
	float4 color : COLOR0; 
}; 
 
float4 psMain( PS_INPUT i ) : COLOR 
{ 
	return i.color; 
} 
 
// -------------------------------------------------------------------------- 
//  effect 
 
technique tec0 { 
	pass P0 { 
		VertexShader = compile vs_1_1 vsMain(); 
		PixelShader = compile ps_1_1 psMain(); 
	} 
	pass PLast { 
	} 
}