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added diffuse convolution CPU side

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devZoGok
2021-11-27 21:15:06 +02:00
parent 7ede4be32a
commit 12e4870789
5 changed files with 85 additions and 23 deletions
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mesh.cpp
+45 -9
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@@ -62,14 +62,16 @@ namespace vb01{
void Mesh::construct(){
string libPath = Root::getSingleton()->getLibPath();
environmentShader = new Shader(libPath + "environmentPreFilter");
irradianceShader = new Shader(libPath + "irradiance");
brdfIntegrationShader = new Shader(libPath + "brdfIntegration");
prefilterMap = new Texture(reflectionSize, false);
irradianceMap = new Texture(reflectionSize, false);
postfilterMap = new Texture(reflectionSize, false, 5);
brdfIntegrationMap = new Texture(reflectionSize, reflectionSize, false);
int width = reflectionSize;
initFramebuffer(preFilterFramebuffer, preFilterRenderbuffer, reflectionSize);
initFramebuffer(irrandianceFramebuffer, irradianceRenderbuffer, reflectionSize);
initFramebuffer(postFilterFramebuffer, postFilterRenderbuffer, reflectionSize);
initFramebuffer(brdfFramebuffer, brdfRenderbuffer, reflectionSize);
@@ -289,8 +291,7 @@ namespace vb01{
shader->setMat4(proj, "proj");
for(int i = 0; i < 6; i++){
vec3 upVec = (fabs(dirs[i].y) == 1 ? vec3(0, 0, -1) : vec3(0, 1, 0));
shader->setMat4(lookAt(vec3(0.0), dirs[i], upVec), "view");
shader->setMat4(lookAt(vec3(0.0), dirs[i], getUpVec(dirs[i])), "view");
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, *prefilterMap->getTexture(), 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -304,10 +305,41 @@ namespace vb01{
}
}
glBindRenderbuffer(GL_RENDERBUFFER, *root->getRBO());
glBindFramebuffer(GL_FRAMEBUFFER, *root->getFBO());
glViewport(0, 0, root->getWidth(), root->getHeight());
}
void Mesh::updateIrradianceMap(Vector3 pos, mat4 &proj, vec3 dirs[6]){
glBindFramebuffer(GL_FRAMEBUFFER, irrandianceFramebuffer);
glBindRenderbuffer(GL_RENDERBUFFER, irradianceRenderbuffer);
glViewport(0, 0, reflectionSize, reflectionSize);
irradianceShader->use();
irradianceShader->setMat4(proj, "proj");
irradianceShader->setInt(0, "environmentMap");
prefilterMap->select();
Root *root = Root::getSingleton();
for(int i = 0; i < 6; i++){
irradianceShader->setMat4(lookAt(vec3(0.0), dirs[i], getUpVec(dirs[i])), "view");
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, *irradianceMap->getTexture(), 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDepthMask(GL_FALSE);
glCullFace(GL_FRONT);
root->getIblBox()->render();
glDepthMask(GL_TRUE);
glCullFace(GL_BACK);
}
glViewport(0, 0, root->getWidth(), root->getHeight());
glBindRenderbuffer(GL_RENDERBUFFER, *root->getRBO());
glBindFramebuffer(GL_FRAMEBUFFER, *root->getFBO());
}
void Mesh::updatePostfilterMap(mat4 &proj, vec3 dirs[6]){
glBindFramebuffer(GL_FRAMEBUFFER, postFilterFramebuffer);
glBindRenderbuffer(GL_RENDERBUFFER, postFilterRenderbuffer);
@@ -329,20 +361,20 @@ namespace vb01{
environmentShader->setFloat((float)i / numMipmaps, "roughness");
for(int j = 0; j < 6; j++){
vec3 upVec = (fabs(dirs[j].y) == 1 ? vec3(0, 0, -1) : vec3(0, 1, 0));
environmentShader->setMat4(lookAt(vec3(0.0), dirs[j], upVec), "view");
environmentShader->setMat4(lookAt(vec3(0.0), dirs[j], getUpVec(dirs[j])), "view");
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + j, *postfilterMap->getTexture(), i);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDepthMask(GL_FALSE);
glCullFace(GL_FRONT);
root->getPostfilterBox()->render();
root->getIblBox()->render();
glDepthMask(GL_TRUE);
glCullFace(GL_BACK);
}
}
glBindRenderbuffer(GL_RENDERBUFFER, *root->getRBO());
glBindFramebuffer(GL_FRAMEBUFFER, *root->getFBO());
glViewport(0, 0, root->getWidth(), root->getHeight());
}
@@ -362,6 +394,7 @@ namespace vb01{
Root *root = Root::getSingleton();
root->getBrdfLutPlane()->render();
glBindRenderbuffer(GL_RENDERBUFFER, *root->getRBO());
glBindFramebuffer(GL_FRAMEBUFFER, *root->getFBO());
glViewport(0, 0, root->getWidth(), root->getHeight());
}
@@ -371,18 +404,21 @@ namespace vb01{
mat4 proj = perspective(radians(90.f), 1.0f, 0.1f, 100.0f);
updatePrefilterMap(pos, proj, dirs);
updateIrradianceMap(pos, proj, dirs);
updatePostfilterMap(proj, dirs);
updateBrdfLut();
Shader *shader = material->getShader();
shader->use();
int brdfId = 10, preFilterId = 11;
int irradianceId = 10, brdfId = 11, postFilterId = 12;
shader->setInt(preFilterId, "preFilterMap");
shader->setInt(irradianceId, "irradianceMap");
shader->setInt(postFilterId, "postFilterMap");
shader->setInt(brdfId, "brdfIntegrationMap");
postfilterMap->select(preFilterId);
irradianceMap->select(irradianceId);
postfilterMap->select(postFilterId);
brdfIntegrationMap->select(brdfId);
}