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Added poison sampling to point light shadows. Closes #11.

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Faerbit 2015-05-31 16:34:14 +02:00
parent 96f146d6f0
commit 1f1741effb
1 changed files with 46 additions and 13 deletions
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59
data/shader/phong.fsh
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@ -68,6 +68,25 @@ vec2 poissonDisk[16] = vec2[](
vec2( 0.14383161, -0.14100790 )
);
vec3 poissonDisk3D[16] = vec3[] (
vec3( 0.541140674379, -0.67854138769, 0.482325914183 ),
vec3( -0.427608163826, 0.79190057714, -0.403470341832 ),
vec3( -0.226067542852, -0.628594453842, -0.661035377645 ),
vec3( -0.811708612677, -0.0340861134035, 0.580406649804 ),
vec3( 0.731005386334, 0.0695021546098, -0.606146385926 ),
vec3( 0.213076426293, 0.6269493206, 0.744636925499 ),
vec3( -0.124461723355, 0.0768244304602, 0.0386785336463 ),
vec3( -0.945249148757, 0.00944808073483, -0.318861658446 ),
vec3( 0.802723394956, 0.124750583818, 0.273800670393 ),
vec3( -0.0571970562351, -0.156203447559, 0.908410256437 ),
vec3( -0.442066534087, -0.709699743423, 0.232493422739 ),
vec3( -0.317263286361, 0.194934041517, -0.923816906742 ),
vec3( 0.381481981953, 0.798989636516, -0.0466460997255 ),
vec3( -0.42752547127, 0.597430401925, 0.374108050255 ),
vec3( 0.12603138305, -0.980780120028, -0.120190366913 ),
vec3( 0.470540545819, -0.633374601042, -0.585070778068 )
);
float flickerFunction(int index) {
float windPower = length(movement);
if (windPower < 0.8) {
@ -146,15 +165,29 @@ float sampleDirectionalShadow(sampler2DShadow shadowMap, vec4 shadowCoord, float
return visibility;
}
float samplePointShadow(samplerCubeShadow shadowMap, vec3 lightDirection) {
float samplePointShadow(samplerCubeShadow shadowMap, vec3 lightDirection, float intensity) {
const float stretching = 10.0;
float visibility = 1.0;
float nearPlane = 0.1;
float A = -(farPlane+nearPlane)/(farPlane-nearPlane);
float B = -2*(farPlane*nearPlane)/(farPlane - nearPlane);
float compValue = 0.5*(-A*length(lightDirection) + B)/length(lightDirection) + 0.5;
float bias = 0.001*tan(acos(clamp(dot(vNormal, normalize(lightDirection)), 0.0, 1.0)));
bias = clamp(bias, 0.0, 0.001);
bias *= 1/length(lightDirection)*8;
return texture(shadowMap, vec4(lightDirection , compValue - bias));
//bias *= 1/length(lightDirection)*8;
for (int i=0; i<4; i++) {
visibility -= intensity/16*(1.0-texture(shadowMap, vec4(lightDirection + poissonDisk3D[i]/stretching, compValue - bias)));
}
if (visibility == 1.0-(intensity/16)*4)
{
visibility = 1.0-intensity;
}
else if (visibility != 1.0) {
for (int i=0; i<12; i++) {
visibility -= intensity/16*(1.0-texture(shadowMap, vec4(lightDirection + poissonDisk3D[i]/stretching, compValue - bias)));
}
}
return visibility;
}
float distanceToBorder(vec2 vector) {
@ -222,34 +255,34 @@ void main()
}
if (intensity > 0.005) {
if (i == 0 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube0, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube0, lightDirection, intensity);
}
if (i == 1 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube1, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube1, lightDirection, intensity);
}
if (i == 2 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube2, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube2, lightDirection, intensity);
}
if (i == 3 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube3, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube3, lightDirection, intensity);
}
if (i == 4 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube4, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube4, lightDirection, intensity);
}
if (i == 5 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube5, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube5, lightDirection, intensity);
}
if (i == 6 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube6, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube6, lightDirection, intensity);
}
if (i == 7 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube7, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube7, lightDirection, intensity);
}
if (i == 8 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube8, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube8, lightDirection, intensity);
}
if (i == 9 && i<maxShadowRenderCount) {
pointVisibility = samplePointShadow(shadowMap_cube9, lightDirection);
pointVisibility = samplePointShadow(shadowMap_cube9, lightDirection, intensity);
}
vec3 lightVector = normalize(lightSources[i]-vec3(fragPosition));
diffuseColor += clamp(dot(normalize(vNormal), lightVector)