diff options
Diffstat (limited to 'indra/newview/app_settings/shaders/class2/deferred/sunLightF.glsl')
| -rw-r--r-- | indra/newview/app_settings/shaders/class2/deferred/sunLightF.glsl | 86 |
1 files changed, 48 insertions, 38 deletions
diff --git a/indra/newview/app_settings/shaders/class2/deferred/sunLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightF.glsl index a0026edcd2..74a948f584 100644 --- a/indra/newview/app_settings/shaders/class2/deferred/sunLightF.glsl +++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightF.glsl @@ -55,51 +55,61 @@ vec4 getPosition(vec2 pos_screen) //calculate decreases in ambient lighting when crowded out (SSAO) float calcAmbientOcclusion(vec4 pos, vec3 norm) { - vec2 kern[8]; - // exponentially (^2) distant occlusion samples spread around origin - kern[0] = vec2(-1.0, 0.0) * 0.125*0.125; - kern[1] = vec2(1.0, 0.0) * 0.250*0.250; - kern[2] = vec2(0.0, 1.0) * 0.375*0.375; - kern[3] = vec2(0.0, -1.0) * 0.500*0.500; - kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625; - kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750; - kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875; - kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000; - - vec2 pos_screen = vary_fragcoord.xy; - vec3 pos_world = pos.xyz; - vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy; - - float angle_hidden = 0.0; - int points = 0; + float ret = 1.0; - float scale = min(ssao_radius / -pos_world.z, ssao_max_radius); + float dist = dot(pos.xyz,pos.xyz); - // it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?) - for (int i = 0; i < 8; i++) + if (dist < 64.0*64.0) { - vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect); - vec3 samppos_world = getPosition(samppos_screen).xyz; + vec2 kern[8]; + // exponentially (^2) distant occlusion samples spread around origin + kern[0] = vec2(-1.0, 0.0) * 0.125*0.125; + kern[1] = vec2(1.0, 0.0) * 0.250*0.250; + kern[2] = vec2(0.0, 1.0) * 0.375*0.375; + kern[3] = vec2(0.0, -1.0) * 0.500*0.500; + kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625; + kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750; + kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875; + kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000; + + vec2 pos_screen = vary_fragcoord.xy; + vec3 pos_world = pos.xyz; + vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy; - vec3 diff = pos_world - samppos_world; - float dist2 = dot(diff, diff); + float angle_hidden = 0.0; + int points = 0; - // assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area - // --> solid angle shrinking by the square of distance - //radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2 - //(k should vary inversely with # of samples, but this is taken care of later) + float scale = min(ssao_radius / -pos_world.z, ssao_max_radius); - //if (dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) // -0.05*norm to shift sample point back slightly for flat surfaces - // angle_hidden += min(1.0/dist2, ssao_factor_inv); // dist != 0 follows from conditional. max of 1.0 (= ssao_factor_inv * ssao_factor) - angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv); + // it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?) + for (int i = 0; i < 8; i++) + { + vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect); + vec3 samppos_world = getPosition(samppos_screen).xyz; + + vec3 diff = pos_world - samppos_world; + float dist2 = dot(diff, diff); + + // assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area + // --> solid angle shrinking by the square of distance + //radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2 + //(k should vary inversely with # of samples, but this is taken care of later) + + //if (dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) // -0.05*norm to shift sample point back slightly for flat surfaces + // angle_hidden += min(1.0/dist2, ssao_factor_inv); // dist != 0 follows from conditional. max of 1.0 (= ssao_factor_inv * ssao_factor) + angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv); + + // 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" + points = points + int(diff.z > -1.0); + } - // 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" - points = points + int(diff.z > -1.0); + angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0); + + ret = (1.0 - (float(points != 0) * angle_hidden)); + ret += max((dist-32.0*32.0)/(32.0*32.0), 0.0); } - angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0); - - return (1.0 - (float(points != 0) * angle_hidden)); + return min(ret, 1.0); } float pcfShadow(sampler2DRectShadow shadowMap, vec4 stc, float scl) @@ -224,11 +234,11 @@ void main() //spotlight shadow 1 vec4 lpos = shadow_matrix[4]*spos; - gl_FragColor[2] = pcfShadow(shadowMap4, lpos, 0.1).x; + gl_FragColor[2] = pcfShadow(shadowMap4, lpos, 0.8).x; //spotlight shadow 2 lpos = shadow_matrix[5]*spos; - gl_FragColor[3] = pcfShadow(shadowMap5, lpos, 0.1).x; + gl_FragColor[3] = pcfShadow(shadowMap5, lpos, 0.8).x; //gl_FragColor.rgb = pos.xyz; //gl_FragColor.b = shadow; |