openmw/files/water/underwater.cg

void main_vp
(
    in float4 inPos : POSITION,

    out float4 pos : POSITION,
    out float2 uv0 : TEXCOORD0,
    out float4 noiseCoord : TEXCOORD1,

    uniform float4x4 worldViewProj,
    uniform float timeVal,
    uniform float scale
)
{
    // Use standardise transform, so work accord with render system specific (RS depth, requires texture flipping, etc)
    pos = mul(worldViewProj, inPos);

    // The input positions adjusted by texel offsets, so clean up inaccuracies
    inPos.xy = sign(inPos.xy);

    // Convert to image-space
    uv0 = (float2(inPos.x, -inPos.y) + 1.0f) * 0.5f;
    noiseCoord = (pos + timeVal) * scale;
}



float4 main_fp_nomrt (float2 iTexCoord : TEXCOORD0,
       	       float3 noiseCoord : TEXCOORD1,
               uniform sampler2D RT : register(s0),
               uniform sampler2D NormalMap : register(s1),
               uniform sampler2D CausticMap : register(s2),
       	       uniform float4 tintColour) : COLOR
{
	float4 normal = tex2D(NormalMap, noiseCoord) * 2 - 1;

	return tex2D(RT, iTexCoord + normal.xy * 0.015) +
	       (tex2D(CausticMap, noiseCoord) / 5) +
	       tintColour ;
}


float4 main_fp (float2 iTexCoord : TEXCOORD0,
       	       float3 noiseCoord : TEXCOORD1,
               uniform float far,
               uniform sampler2D RT : register(s0),
               uniform sampler2D NormalMap : register(s1),
               uniform sampler2D CausticMap : register(s2),
               uniform sampler2D DepthMap : register(s3),
       	       uniform float4 tintColour) : COLOR
{
	float4 normal = tex2D(NormalMap, noiseCoord) * 2 - 1;

    float depth = tex2D(DepthMap, iTexCoord + normal.xy * 0.015).r * far;
    depth = saturate(depth / 2000.f);

    float4 color = tex2D(RT, iTexCoord + normal.xy * 0.015) +
	       (tex2D(CausticMap, noiseCoord) / 5) +
	       tintColour;

	return lerp(color, float4(0, 0.65, 0.65, 1), depth);
}