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Check surface normal when computing rain effect

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This commit is contained in:
Thorsten Renk 2016-08-08 09:40:21 +03:00
parent 8d6413796a
commit d1673bef6d
1 changed files with 6 additions and 1 deletions
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7
Shaders/model-ALS-ultra.frag
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@ -373,13 +373,18 @@ void main (void)
{
texel.rgb = texel.rgb * (1.0 - 0.6 * wetness);
float rain_factor = 0.0;
if (rain_norm > 0.0)
float rain_orientation = max(dot(VNormal, up),0.0);
if ((rain_norm > 0.0) && (rain_orientation > 0.0))
{
rain_factor += DotNoise2D(rawpos.xy, 0.2 ,0.5, rain_norm) * abs(sin(6.0*osg_SimulationTime));
rain_factor += DotNoise2D(rawpos.xy, 0.3 ,0.4, rain_norm) * abs(sin(6.0*osg_SimulationTime + 2.094));
rain_factor += DotNoise2D(rawpos.xy, 0.4 ,0.3, rain_norm)* abs(sin(6.0*osg_SimulationTime + 4.188));
}
// secondary reflection of sky irradiance in water film
float fresnelW = ((0.8 * wetness) ) * (1.0-smoothstep(0.0,0.4, dot(N,-normalize(vertVec)) * 1.0 - 0.2 * rain_factor * wetness));
float sky_factor = (1.0-ct*ct);