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Fix 'Phong distortion' artifact on specular lighting and disappearing emission (due to undefined pow(0,0) called) in Rembrandt

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Frederic Bouvier 2012-07-11 23:59:10 +02:00
parent ce73fe978e
commit d06e249f16
1 changed files with 7 additions and 8 deletions
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15
Shaders/sunlight.frag
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@ -62,8 +62,6 @@ void main() {
if ( spec_emis.a < 0.1 )
discard;
vec3 normal = normal_decode(texture2D( normal_tex, coords ).rg);
float len = length(normal);
normal /= len;
vec3 viewDir = normalize(ray);
vec3 pos = position( viewDir, coords, depth_tex );
@ -89,14 +87,15 @@ void main() {
lightDir = normalize( lightDir );
vec3 color = texture2D( color_tex, coords ).rgb;
vec3 Idiff = clamp( dot( lightDir, normal ), 0.0, 1.0 ) * color * fg_SunDiffuseColor.rgb;
vec3 halfDir = lightDir - viewDir;
len = length( halfDir );
vec3 halfDir = normalize( lightDir - viewDir );
vec3 Ispec = vec3(0.0);
vec3 Iemis = spec_emis.z * color;
if (len > 0.0001) {
halfDir /= len;
Ispec = pow( clamp( dot( halfDir, normal ), 0.0, 1.0 ), spec_emis.y * 128.0 ) * spec_emis.x * fg_SunSpecularColor.rgb;
}
float cosAngIncidence = clamp(dot(normal, lightDir), 0.0, 1.0);
float blinnTerm = clamp( dot( halfDir, normal ), 0.0, 1.0 );
if (cosAngIncidence > 0.0)
Ispec = pow( blinnTerm, spec_emis.y * 128.0 ) * spec_emis.x * fg_SunSpecularColor.rgb;
float matID = texture2D( color_tex, coords ).a * 255.0;
if (matID == 255.0)