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renderer: perform frustum culling only if chunk has vertices

pull/10/head
EmaMaker 2023-10-03 21:35:50 +02:00
parent 880c634be0
commit 353ef37186
1 changed files with 24 additions and 25 deletions
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49
src/renderer.cpp
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@ -149,37 +149,36 @@ namespace renderer{
if(dist <= static_cast<float>(RENDER_DISTANCE)){ if(dist <= static_cast<float>(RENDER_DISTANCE)){
if(!c->getState(Chunk::CHUNK_STATE_MESH_LOADED)) continue; if(!c->getState(Chunk::CHUNK_STATE_MESH_LOADED)) continue;
// Increase total vertex count if(c->numVertices > 0){
vertices += c->numVertices; // Increase total vertex count
vertices += c->numVertices;
// reset out-of-vision and unload flags // reset out-of-vision and unload flags
c->setState(Chunk::CHUNK_STATE_OUTOFVISION, false); c->setState(Chunk::CHUNK_STATE_OUTOFVISION, false);
c->setState(Chunk::CHUNK_STATE_UNLOADED, false); c->setState(Chunk::CHUNK_STATE_UNLOADED, false);
// Perform frustum culling and eventually render // Perform frustum culling and eventually render
glm::vec3 chunk = c->getPosition(); glm::vec3 chunk = c->getPosition();
glm::vec4 chunkW = glm::vec4(chunk.x*static_cast<float>(CHUNK_SIZE), chunk.y*static_cast<float>(CHUNK_SIZE), chunk.z*static_cast<float>(CHUNK_SIZE),1.0); glm::vec4 chunkW = glm::vec4(chunk.x*static_cast<float>(CHUNK_SIZE), chunk.y*static_cast<float>(CHUNK_SIZE), chunk.z*static_cast<float>(CHUNK_SIZE),1.0);
glm::mat4 model = glm::translate(glm::mat4(1.0), ((float)CHUNK_SIZE) * chunk); glm::mat4 model = glm::translate(glm::mat4(1.0), ((float)CHUNK_SIZE) * chunk);
// Check if all the corners of the chunk are outside any of the planes // Check if all the corners of the chunk are outside any of the planes
// TODO (?) implement frustum culling as per (Inigo Quilez)[https://iquilezles.org/articles/frustumcorrect/], and check each // TODO (?) implement frustum culling as per (Inigo Quilez)[https://iquilezles.org/articles/frustumcorrect/], and check each
// plane against each corner of the chunk // plane against each corner of the chunk
bool out=false; bool out=false;
int a{0}; int a{0};
for(int p = 0; p < 6; p++){ for(int p = 0; p < 6; p++){
a = 0; a = 0;
for(int i = 0; i < 8; i++) a += glm::dot(frustumPlanes[p], glm::vec4(chunkW.x + ((float)(i & 1))*CHUNK_SIZE, chunkW.y for(int i = 0; i < 8; i++) a += glm::dot(frustumPlanes[p], glm::vec4(chunkW.x + ((float)(i & 1))*CHUNK_SIZE, chunkW.y
+ ((float)((i & 2) >> 1))*CHUNK_SIZE, chunkW.z + ((float)((i & 4) >> 2))*CHUNK_SIZE, 1.0)) < 0.0; + ((float)((i & 2) >> 1))*CHUNK_SIZE, chunkW.z + ((float)((i & 4) >> 2))*CHUNK_SIZE, 1.0)) < 0.0;
if(a==8){ if(a==8){
out=true; out=true;
break; break;
}
} }
}
if (!out) if (!out)
{
if(c->numVertices > 0)
{ {
theShader->setMat4("model", model); theShader->setMat4("model", model);
theShader->setMat4("view", theCamera.getView()); theShader->setMat4("view", theCamera.getView());