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Rembrandt: several implementations of PCF selectable by editing the code (for now): first #elif 1 wins

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This commit is contained in:
Frederic Bouvier 2012-04-06 22:15:13 +02:00
parent 9b747c48e2
commit 9697a2656e
1 changed files with 8 additions and 1 deletions
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9
Shaders/sunlight.frag
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@ -60,6 +60,13 @@ void main() {
float shadow = 1.0;
#elif 1
float shadow = shadow2DProj( shadow_tex, DynamicShadow( vec4( pos, 1.0 ), tint ) ).r;
#elif 0
float shadow = 0.0;
shadow += 0.333 * shadow2DProj( shadow_tex, DynamicShadow( vec4(pos, 1.0), tint ) ).r;
shadow += 0.166 * shadow2DProj( shadow_tex, DynamicShadow( vec4(pos + vec3(-0.003 * pos.z, -0.003 * pos.z, 0), 1.0), tint ) ).r;
shadow += 0.166 * shadow2DProj( shadow_tex, DynamicShadow( vec4(pos + vec3( 0.003 * pos.z, 0.003 * pos.z, 0), 1.0), tint ) ).r;
shadow += 0.166 * shadow2DProj( shadow_tex, DynamicShadow( vec4(pos + vec3(-0.003 * pos.z, 0.003 * pos.z, 0), 1.0), tint ) ).r;
shadow += 0.166 * shadow2DProj( shadow_tex, DynamicShadow( vec4(pos + vec3( 0.003 * pos.z, -0.003 * pos.z, 0), 1.0), tint ) ).r;
#else
float kernel[9] = float[]( 36/256.0, 24/256.0, 6/256.0,
24/256.0, 16/256.0, 4/256.0,
@ -67,7 +74,7 @@ void main() {
float shadow = 0;
for( int x = -2; x <= 2; ++x )
for( int y = -2; y <= 2; ++y )
shadow += kernel[abs(x)*3 + abs(y)] * shadow2DProj( shadow_tex, DynamicShadow( vec4(pos + vec3(0.05 * x, 0.05 * y, 0), 1.0), tint ) ).r;
shadow += kernel[abs(x)*3 + abs(y)] * shadow2DProj( shadow_tex, DynamicShadow( vec4(pos + vec3(-0.005 * x * pos.z, -0.005 * y * pos.z, 0), 1.0), tint ) ).r;
#endif
vec3 lightDir = (fg_ViewMatrix * vec4( fg_SunDirection, 0.0 )).xyz;
lightDir = normalize( lightDir );