sid
/
NazaraEngine
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Graphics/Shadow: Implement PCF for spot lights 

Former-commit-id: 0045af26b612a5c41268fcf3e3d03893e01c0448
This commit is contained in:
Lynix 2015-08-14 14:13:53 +02:00
parent fabe42dc3a
commit 5cad63c21b
2 changed files with 76 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

96
src/Nazara/Graphics/Resources/Shaders/PhongLighting/core.frag
View File

@ -87,28 +87,37 @@ vec4 EncodeNormal(in vec3 normal)
float VectorToDepthValue(vec3 vec, float zNear, float zFar)
{
vec3 absVec = abs(vec);
float localZ = max(absVec.x, max(absVec.y, absVec.z));
vec3 absVec = abs(vec);
float localZ = max(absVec.x, max(absVec.y, absVec.z));
float normZ = ((zFar + zNear) * localZ - (2.0*zFar*zNear)) / ((zFar - zNear)*localZ);
return (normZ + 1.0) * 0.5;
}
bool TestShadowDirectional(int lightIndex)
float CalculateDirectionalShadowFactor(int lightIndex)
{
vec4 lightSpacePos = vLightSpacePos[lightIndex];
return texture(DirectionalSpotLightShadowMap[lightIndex], lightSpacePos.xy).x >= (lightSpacePos.z - 0.0005);
return (texture(DirectionalSpotLightShadowMap[lightIndex], lightSpacePos.xy).x >= (lightSpacePos.z - 0.0005)) ? 1.0 : 0.0;
}
bool TestShadowPoint(int lightIndex, vec3 lightToWorld, float zNear, float zFar)
float CalculatePointShadowFactor(int lightIndex, vec3 lightToWorld, float zNear, float zFar)
{
return texture(PointLightShadowMap[lightIndex], vec3(lightToWorld.x, -lightToWorld.y, -lightToWorld.z)).x >= VectorToDepthValue(lightToWorld, zNear, zFar);
return (texture(PointLightShadowMap[lightIndex], vec3(lightToWorld.x, -lightToWorld.y, -lightToWorld.z)).x >= VectorToDepthValue(lightToWorld, zNear, zFar)) ? 1.0 : 0.0;
}
bool TestShadowSpot(int lightIndex)
float CalculateSpotShadowFactor(int lightIndex)
{
vec4 lightSpacePos = vLightSpacePos[lightIndex];
return textureProj(DirectionalSpotLightShadowMap[lightIndex], lightSpacePos.xyw).x >= (lightSpacePos.z - 0.0005)/lightSpacePos.w;
float visibility = 1.0;
float x,y;
for (y = -3.5; y <= 3.5; y+= 1.0)
for (x = -3.5; x <= 3.5; x+= 1.0)
visibility += textureProj(DirectionalSpotLightShadowMap[lightIndex], lightSpacePos + vec4(x/1024.0 * lightSpacePos.w, y/1024.0 * lightSpacePos.w, 0.05, 0.0));
visibility /= 64.0;
return visibility;
}
void main()
@ -211,22 +220,30 @@ void main()
// Ambient
lightAmbient += lightColor.rgb * lightAmbientFactor * (MaterialAmbient.rgb + SceneAmbient.rgb);
float att = 1.0;
#if SHADOW_MAPPING
if (Lights[i].shadowMapping && !TestShadowDirectional(i))
break;
if (Lights[i].shadowMapping)
{
float shadowFactor = CalculateDirectionalShadowFactor(i);
if (shadowFactor == 0.0)
break;
att *= shadowFactor;
}
#endif
// Diffuse
float lambert = max(dot(normal, lightDir), 0.0);
lightDiffuse += lambert * lightColor.rgb * lightDiffuseFactor;
lightDiffuse += att * lambert * lightColor.rgb * lightDiffuseFactor;
// Specular
vec3 reflection = reflect(-lightDir, normal);
float specularFactor = max(dot(reflection, eyeVec), 0.0);
specularFactor = pow(specularFactor, MaterialShininess);
lightSpecular += specularFactor * lightColor.rgb;
lightSpecular += att * specularFactor * lightColor.rgb;
break;
}
@ -246,8 +263,14 @@ void main()
lightAmbient += att * lightColor.rgb * lightAmbientFactor * (MaterialAmbient.rgb + SceneAmbient.rgb);
#if SHADOW_MAPPING
if (Lights[i].shadowMapping && !TestShadowPoint(i, vWorldPos - lightPos, 0.1, 50.0))
break;
if (Lights[i].shadowMapping)
{
float shadowFactor = CalculatePointShadowFactor(i, vWorldPos - lightPos, 0.1, 50.0);
if (shadowFactor == 0.0)
break;
att *= shadowFactor;
}
#endif
// Diffuse
@ -283,8 +306,14 @@ void main()
lightAmbient += att * lightColor.rgb * lightAmbientFactor * (MaterialAmbient.rgb + SceneAmbient.rgb);
#if SHADOW_MAPPING
if (Lights[i].shadowMapping && !TestShadowSpot(i))
break;
if (Lights[i].shadowMapping)
{
float shadowFactor = CalculateSpotShadowFactor(i);
if (shadowFactor == 0.0)
break;
att *= shadowFactor;
}
#endif
// Modification de l'atténuation pour gérer le spot
@ -328,10 +357,23 @@ void main()
// Ambient
lightAmbient += lightColor.rgb * lightAmbientFactor * (MaterialAmbient.rgb + SceneAmbient.rgb);
float att = 1.0;
#if SHADOW_MAPPING
if (Lights[i].shadowMapping)
{
float shadowFactor = CalculateDirectionalShadowFactor(i);
if (shadowFactor == 0.0)
break;
att *= shadowFactor;
}
#endif
// Diffuse
float lambert = max(dot(normal, lightDir), 0.0);
lightDiffuse += lambert * lightColor.rgb * lightDiffuseFactor;
lightDiffuse += att * lambert * lightColor.rgb * lightDiffuseFactor;
break;
}
@ -351,8 +393,14 @@ void main()
lightAmbient += att * lightColor.rgb * lightAmbientFactor * (MaterialAmbient.rgb + SceneAmbient.rgb);
#if SHADOW_MAPPING
if (Lights[i].shadowMapping && !TestShadowPoint(i, vWorldPos - lightPos, 0.1, 1.0 / lightInvRadius))
break;
if (Lights[i].shadowMapping)
{
float shadowFactor = CalculatePointShadowFactor(i, vWorldPos - lightPos, 0.1, 50.0);
if (shadowFactor == 0.0)
break;
att *= shadowFactor;
}
#endif
// Diffuse
@ -381,8 +429,14 @@ void main()
lightAmbient += att * lightColor.rgb * lightAmbientFactor * (MaterialAmbient.rgb + SceneAmbient.rgb);
#if SHADOW_MAPPING
if (Lights[i].shadowMapping && !TestShadowSpot(i))
break;
if (Lights[i].shadowMapping)
{
float shadowFactor = CalculateSpotShadowFactor(i);
if (shadowFactor == 0.0)
break;
att *= shadowFactor;
}
#endif
// Modification de l'atténuation pour gérer le spot

2
src/Nazara/Graphics/Resources/Shaders/PhongLighting/core.frag.h
View File

File diff suppressed because one or more lines are too long