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Added method of getting cube's index

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Warwick 2022-08-15 12:08:54 +01:00
parent bb349e9994
commit 01121fe526
2 changed files with 39 additions and 0 deletions
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33
src/MarchingCubeChunkRenderer.cpp
View file

@ -1,5 +1,7 @@
#include "MarchingCubeChunkRenderer.h"
const float MarchingCubeChunkRenderer::noiseCutOff = 0.2f;
MarchingCubeChunkRenderer::MarchingCubeChunkRenderer(
std::vector<Chunk> &chunks, std::vector<Model *> models) {
this->chunks = &chunks;
@ -16,6 +18,7 @@ void MarchingCubeChunkRenderer::draw(ShaderLoader &shader) {
for (int y = ti.yRange[0]; y < ti.yRange[1]; y++) {
for (int z = ti.zRange[0]; z < ti.zRange[1]; z++) {
if (chunk->getNoise(x, y, z) > 0.2f) {
this->genCubeModel(x, y, z, *chunk);
models.at(0)->setPosition(glm::vec3(x, y, z));
models.at(0)->draw(shader);
}
@ -24,3 +27,33 @@ void MarchingCubeChunkRenderer::draw(ShaderLoader &shader) {
}
}
}
Model *MarchingCubeChunkRenderer::genCubeModel(int x, int y, int z,
Chunk &chunk) {
// Gen cube index. Based on figure 4 from:
// https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.545.613
bool bIndex[8] = {false};
if (chunk.getNoise(x, y, z) > noiseCutOff)
bIndex[7] = true;
if (chunk.getNoise(x + 1, y, z) > noiseCutOff)
bIndex[6] = true;
if (chunk.getNoise(x + 1, y + 1, z) > noiseCutOff)
bIndex[5] = true;
if (chunk.getNoise(x, y + 1, z) > noiseCutOff)
bIndex[4] = true;
if (chunk.getNoise(x, y, z + 1) > noiseCutOff)
bIndex[3] = true;
if (chunk.getNoise(x + 1, y, z + 1) > noiseCutOff)
bIndex[2] = true;
if (chunk.getNoise(x + 1, y + 1, z + 1) > noiseCutOff)
bIndex[1] = true;
if (chunk.getNoise(x, y + 1, z + 1) > noiseCutOff)
bIndex[0] = true;
uint8_t index;
for (int i = 0; i < 8; i++)
index = index + (bIndex[i] * (pow(2, i)));
return models.at(0);
}

6
src/MarchingCubeChunkRenderer.h
View file

@ -10,6 +10,9 @@ class MarchingCubeChunkRenderer {
private:
Error error = Error("MarchingCubeChunkRenderer");
// Noise cut off value.
const static float noiseCutOff;
// Chunks to render
std::vector<Chunk> *chunks;
@ -18,6 +21,9 @@ private:
// https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.545.613
std::vector<Model *> models;
// Determine Cubes Model and translation.
Model *genCubeModel(int x, int y, int z, Chunk &chunk);
public:
MarchingCubeChunkRenderer(std::vector<Chunk> &chunks,
std::vector<Model *> models);