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#include "chunk.hpp"
#include "xe_engine.hpp"
namespace app {
static std::map<std::string, std::unique_ptr<Chunk>> chunks{};
Chunk::Chunk(uint32_t gridX, uint32_t gridZ, uint32_t world_seed)
: world_seed{world_seed},
chunk_seed{(world_seed * gridX) + (world_seed * gridZ) / 2},
gridX{gridX},
gridZ{gridZ} {
generate();
}
Chunk* Chunk::newChunk(uint32_t gridX, uint32_t gridZ, uint32_t world_seed) {
std::unique_ptr<Chunk> chunk = std::make_unique<Chunk>(gridX, gridZ, world_seed);
std::string key = gridX + "." + gridZ;
chunks[key] = std::move(chunk);
return chunks[key].get();
}
void Chunk::reset() {
chunks.clear();
}
std::shared_ptr<xe::Model> Chunk::getMesh() {
if(reloadRequired) {
delete chunkMesh.get();
xe::Model::Builder builder{};
builder.vertexData = vertexData;
builder.vertexSize = 44;
chunkMesh = std::make_shared<xe::Model>(xe::Engine::getInstance()->getDevice(), builder);
}
return chunkMesh;
}
uint8_t Chunk::getBlock(uint32_t x, uint32_t y, uint32_t z) {
if(y < 0 || y > 256) return AIR;
int chunkX = gridX;
int chunkZ = gridZ;
if(x < 0) {
chunkX--;
x = 15;
} else if(x > 16) {
chunkX ++;
x = 0;
}
if(z < 0) {
chunkZ--;
z = 15;
} else if(z > 16) {
chunkZ ++;
z = 0;
}
if(chunkX == gridX && chunkZ == gridZ) {
int index = (z * 16 * 256) + (y * 16) + x;
return blocks[index];
} else {
Chunk* chunk = getChunk(chunkX, chunkZ);
if(chunk == nullptr) {
return AIR;
} else {
int index = (z * 16 * 256) + (y * 16) + x;
return chunk->blocks[index];
}
}
}
void Chunk::setBlock(uint32_t x, uint32_t y, uint32_t z, uint8_t block) {
int index = (z * 16 * 256) + (y * 16) + x;
blocks[index] = block;
}
Chunk* Chunk::getChunk(uint32_t x, uint32_t z) {
std::string key = x + "." + z;
if(chunks.count(key))
return chunks[key].get();
else
return nullptr;
}
void Chunk::createMeshAsync() {
if(working) return;
// worker = std::thread(createMesh);
}
void Chunk::createMesh() {
working = true;
vertexData.clear();
for(int x=0;x<16;x++) {
for(int y=0; y<256; y++) {
for(int z=0; z<16; z++) {
uint8_t block = getBlock(x,y,z);
if(block == AIR) continue;
if(getBlock(x+1,y,z) == AIR) {
addVerticies(0, x, y, z);
}
if(getBlock(x-1,y,z) == AIR) {
addVerticies(1, x, y, z);
}
if(getBlock(x,y+1,z) == AIR) {
addVerticies(2, x, y, z);
}
if(getBlock(x,y-1,z) == AIR) {
addVerticies(3, x, y, z);
}
if(getBlock(x,y,z+1) == AIR) {
addVerticies(4, x, y, z);
}
if(getBlock(x,y,z-1) == AIR) {
addVerticies(5, x, y, z);
}
}
}
}
working = false;
reloadRequired = true;
}
void Chunk::addVerticies(uint32_t side, uint32_t x, uint32_t y, uint32_t z) {
for(int i = 0; i < 6; i ++) {
vertexData.push_back(px[side * 6 + i][0] + x);
vertexData.push_back(px[side * 6 + i][1] + y);
vertexData.push_back(px[side * 6 + i][2] + z);
vertexData.push_back(1.f);
vertexData.push_back(1.f);
vertexData.push_back(1.f);
vertexData.push_back(nm[side][0]);
vertexData.push_back(nm[side][1]);
vertexData.push_back(nm[side][2]);
vertexData.push_back(uv[i][0]);
vertexData.push_back(uv[i][1]);
}
}
void Chunk::generate() {
blocks.resize(16*16*256);
const PerlinNoise perlin{123};
for(int x = 0; x < 16; x++) {
for(int z = 0; z < 16; z++) {
int height = perlin.octave2D_01((x * 0.01), (z * 0.01), 4) * 5;
for(int y = 0; y < 256; y++) {
if(y <= height)
setBlock(x, y, z, DIRT);
else
setBlock(x, y, z, AIR);
}
}
}
}
}
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