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

 
// Terrain rendering. 
// Fallback for non-MRT cards. Normal/Z only part. 
// 
// Versions: vs1.1, ps2.0 
 
#include "_shared.fx" 
#include "_library.fx" 
 
texture		tShadowMap; 
 
 
// -------------------------------------------------------------------------- 
//  samplers  
 
sampler smpShadowMap = sampler_state { 
    Texture   = (tShadowMap); 
    MipFilter = Linear; MinFilter = Linear; MagFilter = Linear; 
    AddressU = Clamp; AddressV = Clamp; 
}; 
 
 
// -------------------------------------------------------------------------- 
//  vertex shader 
 
struct VS_OUTPUT { 
	float4 pos		: POSITION; 
	float2 uvShadow[4] : TEXCOORD0; // RGAA shadow map taps 
	float4 normalZ : TEXCOORD4; // normal (RGB), depth (A) 
}; 
 
VS_OUTPUT vsMain ( 
	float4	pos : POSITION, 
	float3	normal : NORMAL ) 
{ 
    VS_OUTPUT o; 
 
	normal = normal*2-1; 
 
	// final pos 
	o.pos = mul( pos, mViewProj ); 
 
	// shadow map coords for 4xRGAA 
	o.uvShadow[0] = mul( pos, mShadowProj0 ); 
	o.uvShadow[1] = mul( pos, mShadowProj1 ); 
	o.uvShadow[2] = mul( pos, mShadowProj2 ); 
	o.uvShadow[3] = mul( pos, mShadowProj3 ); 
 
	// normal/Z 
	o.normalZ = gNormalZ( o.pos, normal ); 
 
	return o; 
} 
 
// -------------------------------------------------------------------------- 
//  pixel shader 
 
struct PS_INPUT { 
	float2 uvShadow[4] : TEXCOORD0; // shadow map taps 
	half4 normalZ : TEXCOORD4; 
}; 
 
float4 psMain( PS_INPUT i ) : COLOR 
{ 
	// 4xRGAA shadow map 
	half4 shadowTaps; 
	shadowTaps.x = tex2D( smpShadowMap, i.uvShadow[0] ).a; 
	shadowTaps.y = tex2D( smpShadowMap, i.uvShadow[1] ).a; 
	shadowTaps.z = tex2D( smpShadowMap, i.uvShadow[2] ).a; 
	shadowTaps.w = tex2D( smpShadowMap, i.uvShadow[3] ).a; 
	half shadow = dot( shadowTaps, 0.25 ); 
 
	// normal/Z 
	half3 norm = i.normalZ.xyz; 
	half z = i.normalZ.w; 
	if( shadow < 0.75 ) // change depth in shadow 
		z = 1.0; 
 
	return half4( norm, z ); 
} 
 
 
// -------------------------------------------------------------------------- 
//  effect 
 
technique tecPS20 { 
	pass P0 { 
		VertexShader = compile vs_1_1 vsMain(); 
		PixelShader = compile ps_2_0 psMain(); 
	} 
	pass PLast { 
	} 
}