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fixed refraction and underwater distortion artifacts

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scrawl 2012-04-08 15:03:09 +02:00
parent 113bbfa253
commit 8caa5ff9c4
2 changed files with 16 additions and 4 deletions
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2
files/water/underwater.cg
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@ -50,7 +50,7 @@ float4 main_fp (float2 iTexCoord : TEXCOORD0,
{ {
float4 normal = tex2D(NormalMap, noiseCoord) * 2 - 1; float4 normal = tex2D(NormalMap, noiseCoord) * 2 - 1;
float depth = tex2D(DepthMap, iTexCoord).r * far; float depth = tex2D(DepthMap, iTexCoord + normal.xy * 0.015).r * far;
depth = saturate(depth / 2000.f); depth = saturate(depth / 2000.f);
float4 color = tex2D(RT, iTexCoord + normal.xy * 0.015) + float4 color = tex2D(RT, iTexCoord + normal.xy * 0.015) +

18
files/water/water.cg
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@ -62,7 +62,6 @@ void main_fp
float depthTex = tex2D(depthMap, screenCoords).r; float depthTex = tex2D(depthMap, screenCoords).r;
float depth1 = depthTex * far - iDepth; float depth1 = depthTex * far - iDepth;
depth1 = saturate(depth1 / 500.f); depth1 = saturate(depth1 / 500.f);
depth1 = (depthTex == 0 ? 1 : depth1);
// Simple wave effect. to be replaced by something better // Simple wave effect. to be replaced by something better
float2 uv1 = iUv + time * float2(0.5, 0); float2 uv1 = iUv + time * float2(0.5, 0);
@ -74,7 +73,20 @@ void main_fp
normal = 2*normal - 1; normal = 2*normal - 1;
float2 screenCoords_reflect = screenCoords + normal.yx * 0.05; float2 screenCoords_reflect = screenCoords + normal.yx * 0.05;
float2 screenCoords_refract = screenCoords + normal.yx * 0.1 * depth1; float2 screenCoords_refract = screenCoords + normal.yx * 0.05 * depth1;
// Sample depth again with the refracted coordinates
depthTex = tex2D(depthMap, screenCoords_refract).r;
float depth2 = (depthTex * far - iDepth) / 500.f;
depth2 = (depthTex == 0 ? 1 : depth2);
// if depth2 is less than 0, this means we would refract something which is above water,
// which we don't want to - so in that case, don't refract
if (depth2 < 0.25) // delta due to inaccuracies
{
screenCoords_refract = screenCoords;
depth2 = depth1;
}
depth2 = saturate(depth2);
float4 reflection = tex2D(reflectionMap, screenCoords_reflect); float4 reflection = tex2D(reflectionMap, screenCoords_reflect);
float4 refraction = tex2D(refractionMap, screenCoords_refract); float4 refraction = tex2D(refractionMap, screenCoords_refract);
@ -93,7 +105,7 @@ void main_fp
float3 halfVector = normalize(iEyeVector + lightDir); float3 halfVector = normalize(iEyeVector + lightDir);
float specular = pow(max(dot(normal.xyz, halfVector.xyz), 0), 64); float specular = pow(max(dot(normal.xyz, halfVector.xyz), 0), 64);
float opacity = depth1 * saturate(reflectionFactor + specular); float opacity = depth2 * saturate(reflectionFactor + specular);
opacity *= (1-isUnderwater); opacity *= (1-isUnderwater);
reflection.xyz += lightSpecularColour0.xyz * specular; reflection.xyz += lightSpecularColour0.xyz * specular;