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

 
// Water rendering. 
// 
// Outputs color into RT0, (fake) normal/Z into RT1. 
// Water just gets a projected reflection texture, that is perturbed by 
// a blend of two scrolling generic "wave" textures. 
// Outputs max Z as depth and light dir as normal into RT1; 
// 
// Versions: vs1.1, ps2.0 
 
#include "_shared.fx" 
 
texture		tRefl; 
texture		tWaves; 
 
 
// -------------------------------------------------------------------------- 
//  samplers  
 
sampler smpRefl = sampler_state { 
    Texture   = (tRefl); 
    MipFilter = Linear; MinFilter = Linear; MagFilter = Linear; 
    AddressU = Clamp; AddressV = Clamp; 
}; 
sampler smpWaves = sampler_state { 
    Texture   = (tWaves); 
    MipFilter = None; MinFilter = Linear; MagFilter = Linear; 
    AddressU = Wrap; AddressV = Wrap; 
}; 
 
// -------------------------------------------------------------------------- 
//  vertex shader 
 
struct VS_OUTPUT { 
	float4 pos		: POSITION; 
	float4 uv		: TEXCOORD0; 
	float2 uvWaves[2] : TEXCOORD1; 
}; 
 
VS_OUTPUT vsMain ( 
	float4	pos : POSITION ) 
{ 
    VS_OUTPUT o; 
	o.pos = mul( pos, mWVP ); 
	float4 camPos = mul( pos, mWorldView ); 
	camPos = mul( camPos, mTexProj ); 
	o.uv = camPos; 
 
	float2 uvWaves = pos.xz * 0.02f; 
	o.uvWaves[0] = uvWaves + float2(  fTime * 0.05f,  fTime * 0.01f ); 
	o.uvWaves[1] = uvWaves + float2( -fTime * 0.01f, -fTime * 0.04f ); 
 
	return o; 
} 
 
// -------------------------------------------------------------------------- 
//  pixel shader 
 
struct PS_INPUT { 
	float4 uv		: TEXCOORD0; 
	float2 uvWaves[2] : TEXCOORD1; 
}; 
 
struct PS_OUTPUT { 
	half4 color : COLOR0; 
	half4 normalZ : COLOR1; 
}; 
 
PS_OUTPUT psMain( PS_INPUT i ) 
{ 
	PS_OUTPUT o; 
 
	float2 uv = i.uv.xy / i.uv.w; 
	half2 t0 = tex2D( smpWaves, i.uvWaves[0] ).xy; 
	half2 t1 = tex2D( smpWaves, i.uvWaves[1] ).xy; 
	half2 t = (t0 + t1) * 0.01; 
	o.color = tex2D( smpRefl, uv+t ); 
 
	// normal/Z 
	o.normalZ = half4( vLightDir, 1.0 ); 
 
	return o; 
} 
 
// -------------------------------------------------------------------------- 
//  effect 
 
technique tec0 { 
	pass P0 { 
		VertexShader = compile vs_1_1 vsMain(); 
		PixelShader = compile ps_2_0 psMain(); 
	} 
	pass PLast { 
	} 
} 
technique tecDummy { 
	pass P0 { 
	} 
}