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Performance optimization for deciding when the directional shadow gets rendered.

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This commit is contained in:
Faerbit 2015-05-28 15:03:08 +02:00
parent a8ce6916e7
commit c8ba61ca56
3 changed files with 63 additions and 52 deletions
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51
data/shader/phong.fsh
View File

@ -47,6 +47,7 @@ uniform bool movingTexture;
uniform vec2 movement;
uniform vec2 movingTextureOffset;
uniform float time;
uniform bool sampleDirectionalShadowSwitch;
vec2 poissonDisk[16] = vec2[](
vec2( -0.94201624, -0.39906216 ),
@ -171,40 +172,38 @@ void main()
// direction lighting
float sunAngle = -1.0;
if(length(directionalLightVector)>0.0f) {
if(sampleDirectionalShadowSwitch) {
vec3 directionalVector = normalize(directionalLightVector);
sunAngle = dot(vec3(0.0, 1.0, 0.0), directionalVector);
if ( sunAngle > 0.0) {
float directionalVisibility = 1.0f;
float directionalIntensity = sunIntensity(sunAngle);
if (distanceToBorder(shadowCoord1.xy) <= 0.5 && distanceToBorder(shadowCoord1.xy) > 0.2) {
if (distanceToBorder(shadowCoord0.xy) <= 0.5 && distanceToBorder(shadowCoord0.xy) > 0.2) {
directionalVisibility = sampleDirectionalShadow(shadowMap_directional0, shadowCoord0, 0.001, directionalIntensity);
}
else if (distanceToBorder(shadowCoord0.xy) <= 0.5 && distanceToBorder(shadowCoord0.xy) > 0.0) {
float directionalVisibility0 = sampleDirectionalShadow(shadowMap_directional0, shadowCoord0, 0.001, directionalIntensity);
float directionalVisibility1 = sampleDirectionalShadow(shadowMap_directional1, shadowCoord1, 0.002, directionalIntensity);
directionalVisibility = mix(directionalVisibility0, directionalVisibility1, distanceToBorder(shadowCoord0.xy) * 5);
}
else {
directionalVisibility = sampleDirectionalShadow(shadowMap_directional1, shadowCoord1, 0.002, directionalIntensity);
}
float directionalVisibility = 1.0f;
float directionalIntensity = sunIntensity(sunAngle);
if (distanceToBorder(shadowCoord1.xy) <= 0.5 && distanceToBorder(shadowCoord1.xy) > 0.2) {
if (distanceToBorder(shadowCoord0.xy) <= 0.5 && distanceToBorder(shadowCoord0.xy) > 0.2) {
directionalVisibility = sampleDirectionalShadow(shadowMap_directional0, shadowCoord0, 0.001, directionalIntensity);
}
else if (distanceToBorder(shadowCoord1.xy) <= 0.5 && distanceToBorder(shadowCoord1.xy) > 0.0) {
else if (distanceToBorder(shadowCoord0.xy) <= 0.5 && distanceToBorder(shadowCoord0.xy) > 0.0) {
float directionalVisibility0 = sampleDirectionalShadow(shadowMap_directional0, shadowCoord0, 0.001, directionalIntensity);
float directionalVisibility1 = sampleDirectionalShadow(shadowMap_directional1, shadowCoord1, 0.002, directionalIntensity);
float directionalVisibility2 = sampleDirectionalShadow(shadowMap_directional2, shadowCoord2, 0.01, directionalIntensity);
directionalVisibility = mix(directionalVisibility1, directionalVisibility2, distanceToBorder(shadowCoord1.xy) * 5);
directionalVisibility = mix(directionalVisibility0, directionalVisibility1, distanceToBorder(shadowCoord0.xy) * 5);
}
else {
directionalVisibility = sampleDirectionalShadow(shadowMap_directional2, shadowCoord2, 0.01, directionalIntensity);
directionalVisibility = sampleDirectionalShadow(shadowMap_directional1, shadowCoord1, 0.002, directionalIntensity);
}
diffuseColor += clamp(dot(normalize(vNormal), directionalVector)
*diffuseFactor*directionalIntensity*sunColor(sunAngle), 0.0, 1.0)*directionalVisibility;
vec3 cameraVector = normalize(camera - vec3(fragPosition));
specularColor += clamp(pow((dot((cameraVector+directionalVector),normalize(vNormal))/
(length(cameraVector+directionalVector)*length(normalize(vNormal)))),shininess), 0.0, 1.0)
*specularFactor*directionalIntensity*sunColor(sunAngle)*directionalVisibility;
}
else if (distanceToBorder(shadowCoord1.xy) <= 0.5 && distanceToBorder(shadowCoord1.xy) > 0.0) {
float directionalVisibility1 = sampleDirectionalShadow(shadowMap_directional1, shadowCoord1, 0.002, directionalIntensity);
float directionalVisibility2 = sampleDirectionalShadow(shadowMap_directional2, shadowCoord2, 0.01, directionalIntensity);
directionalVisibility = mix(directionalVisibility1, directionalVisibility2, distanceToBorder(shadowCoord1.xy) * 5);
}
else {
directionalVisibility = sampleDirectionalShadow(shadowMap_directional2, shadowCoord2, 0.01, directionalIntensity);
}
diffuseColor += clamp(dot(normalize(vNormal), directionalVector)
*diffuseFactor*directionalIntensity*sunColor(sunAngle), 0.0, 1.0)*directionalVisibility;
vec3 cameraVector = normalize(camera - vec3(fragPosition));
specularColor += clamp(pow((dot((cameraVector+directionalVector),normalize(vNormal))/
(length(cameraVector+directionalVector)*length(normalize(vNormal)))),shininess), 0.0, 1.0)
*specularFactor*directionalIntensity*sunColor(sunAngle)*directionalVisibility;
}
// point lights

63
game/graphics.cc
View File

@ -30,6 +30,7 @@ Graphics::Graphics(glm::uvec2 windowSize, float nearPlane,
renderFlames = true;
renderWorld = true;
renderDebug = false;
directionalShadowSwitch = false;
}
Graphics::Graphics() {
@ -196,6 +197,7 @@ void Graphics::init(Level* level) {
lightingShader->setUniform("fogColorRise", level->getFogColourRise());
lightingShader->setUniform("fogColorNight", level->getFogColourNight());
lightingShader->setUniform("ambientColor", level->getAmbientLight());
lightingShader->setUniform("sampleDirectionalShadowSwitch", false);
if(level->getDirectionalLight()) {
lightingShader->setUniform("directionalLightVector",
level->getDirectionalLight()->getPosition());
@ -361,37 +363,46 @@ void Graphics::render(double time)
}
}
// render depth textures for sun
depthShader->use();
glViewport(0, 0, windowSize.x, windowSize.y);
// render depth textures for sun
float sunAngle = glm::dot(glm::vec3(0.0f, 1.0f, 0.0f), glm::normalize(level->getDirectionalLight()->getPosition()));
glm::vec3 sunVector = (level->getCameraCenter()->getPosition() + level->getDirectionalLight()->getPosition());
for (unsigned int i = 0; i<framebuffer_directional.size(); i++) {
framebuffer_directional.at(i)->bind();
glClear(GL_DEPTH_BUFFER_BIT);
if (sunAngle > 0.0f) {
float projection_size = 0.0f;
switch(i) {
case 0:
projection_size = 10.0f;
break;
case 1:
projection_size = 30.0f;
break;
case 2:
projection_size = farPlane/1.5f;
break;
}
depthViewProjectionMatrices.at(i) = glm::ortho<float>(-projection_size, projection_size, -projection_size, projection_size, -farPlane/1.5f, farPlane/1.5f) *
glm::lookAt(sunVector, level->getCameraCenter()->getPosition(), glm::vec3(0,1,0));
level->render(depthShader, false, -1, &depthViewProjectionMatrices.at(i));
if (!framebuffer_directional.at(i)->isFrameBufferObjectComplete()) {
printf("Framebuffer incomplete, unknown error occured during shadow generation!\n");
}
if (sunAngle > 0.0f) {
if (!directionalShadowSwitch) {
lightingShader->use();
lightingShader->setUniform("sampleDirectionalShadowSwitch", true);
directionalShadowSwitch = true;
}
depthShader->use();
for (unsigned int i = 0; i<framebuffer_directional.size(); i++) {
framebuffer_directional.at(i)->bind();
glClear(GL_DEPTH_BUFFER_BIT);
float projection_size = 0.0f;
switch(i) {
case 0:
projection_size = 10.0f;
break;
case 1:
projection_size = 30.0f;
break;
case 2:
projection_size = farPlane/1.5f;
break;
}
depthViewProjectionMatrices.at(i) = glm::ortho<float>(-projection_size, projection_size, -projection_size, projection_size, -farPlane/1.5f, farPlane/1.5f) *
glm::lookAt(sunVector, level->getCameraCenter()->getPosition(), glm::vec3(0,1,0));
level->render(depthShader, false, -1, &depthViewProjectionMatrices.at(i));
if (!framebuffer_directional.at(i)->isFrameBufferObjectComplete()) {
printf("Framebuffer incomplete, unknown error occured during shadow generation!\n");
}
}
}
else if (directionalShadowSwitch) {
lightingShader->use();
lightingShader->setUniform("sampleDirectionalShadowSwitch", false);
directionalShadowSwitch = false;
}
}

1
game/graphics.hh
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@ -84,6 +84,7 @@ class Graphics {
bool renderFlames;
bool renderDebug;
bool renderWorld;
bool directionalShadowSwitch;
DebugDraw debugDrawer;
SharedArrayBuffer debug_ab;
SharedVertexArrayObject debug_vao;