variable chunk sizes

3 files changed, 27 insertions, 23 deletions

diff --git a/src/chunk.cpp b/src/chunk.cpp
index 21910ac..55f8832 100644
--- a/src/chunk.cpp
+++ b/src/chunk.cpp
@@ -180,9 +180,9 @@ void Chunk::createMesh(Chunk* c) {
     const int Axis1 = (Axis + 1) % 3;
     const int Axis2 = (Axis + 2) % 3;
 
-    const int MainAxisLimit = Axis == 1 ? 256 : 16; 
-    int Axis1Limit = Axis1 == 1 ? 256 : 16;
-    int Axis2Limit = Axis2 == 1 ? 256 : 16;
+    const int MainAxisLimit = CHUNK_SIZE[Axis]; 
+    const int Axis1Limit = CHUNK_SIZE[Axis1];
+    const int Axis2Limit = CHUNK_SIZE[Axis2];
 
     auto DeltaAxis1 = glm::vec3(0.f);
     auto DeltaAxis2 = glm::vec3(0.f);
@@ -296,15 +296,15 @@ void Chunk::generateAsync(Chunk* c) {
 }
 
 void Chunk::generate(Chunk* c) {
-  c->cubes.resize(16*16*256);
+  c->cubes.resize(CHUNK_SIZE.x*CHUNK_SIZE.y*CHUNK_SIZE.z);
   
   const PerlinNoise perlin{c->world_seed};
 
-  for(int x = 0; x < 16; x++) {
-    for(int z = 0; z < 16; z++) {
+  for(int x = 0; x < CHUNK_SIZE.x; x++) {
+    for(int z = 0; z < CHUNK_SIZE.z; z++) {
       double biome = perlin.octave2D_01((( x + c->gridX * 13) * 0.0005), ((z + c->gridZ * 13) * 0.0005), 4) * 2;
-      double continent = perlin.octave2D_01((( x + c->gridX * 16) * 0.001), ((z + c->gridZ * 16) * 0.001), 4) * 10 - 5;
-      double noise = perlin.octave2D_01((( x + c->gridX * 16) * 0.01), ((z + c->gridZ * 16) * 0.01), 4);
+      double continent = perlin.octave2D_01((( x + c->gridX * CHUNK_SIZE.x) * 0.001), ((z + c->gridZ * CHUNK_SIZE.z) * 0.001), 4) * 10 - 5;
+      double noise = perlin.octave2D_01((( x + c->gridX * CHUNK_SIZE.x) * 0.01), ((z + c->gridZ * CHUNK_SIZE.z) * 0.01), 4);
       int height = noise * 40 + continent;
       for(int y = 0; y < std::max(height, WATER_LEVEL); y++) {
         int difference = y - WATER_LEVEL;
@@ -353,38 +353,41 @@ xe::Model* Chunk::getMesh() {
 }
 
 uint8_t Chunk::getBlock(int32_t x, int32_t y, int32_t z) {
-  if(y >= 256) return AIR;
+  if(y >= CHUNK_SIZE.y) return AIR;
   if(y < 0) return INVALID;
   int chunkX = gridX;
   int chunkZ = gridZ;
   if(x < 0) {
     chunkX--;
-  } else if(x > 15) {
+  } else if(x > CHUNK_SIZE.x-1) {
     chunkX++;
   }
   if(z < 0) {
     chunkZ--;
-  } else if(z > 15) {
+  } else if(z > CHUNK_SIZE.z-1) {
     chunkZ++;
   }
-  x = (x+16)%16;
-  z = (z+16)%16;
+  x = (x+CHUNK_SIZE.x)%CHUNK_SIZE.x;
+  z = (z+CHUNK_SIZE.z)%CHUNK_SIZE.z;
   if(chunkX == gridX && chunkZ == gridZ) {
-    int index = x + (z * 16) + (y * 256);
+    int index = x + (y * CHUNK_SIZE.x) + (z * CHUNK_SIZE.x * CHUNK_SIZE.y);
     return cubes[index];
   } else {
     Chunk* chunk = getChunk(chunkX, chunkZ);
     if(chunk == NULL) {
       return INVALID;
     } else {
-      int index = x + (z * 16) + (y * 256);
+       int index = x + (y * CHUNK_SIZE.x) + (z * CHUNK_SIZE.x * CHUNK_SIZE.y);
       return chunk->cubes[index];
     }
   }
 }
 
 void Chunk::setBlock(int32_t x, int32_t y, int32_t z, uint8_t block) {
-  int index = x + (z * 16) + (y * 256);
+  if(x < 0 || x >= CHUNK_SIZE.x) return;
+  if(y < 0 || y >= CHUNK_SIZE.y) return;
+  if(z < 0 || z >= CHUNK_SIZE.z) return;
+  int index = x + (y * CHUNK_SIZE.x) + (z * CHUNK_SIZE.x * CHUNK_SIZE.y);
   cubes[index] = block;
 }
 
diff --git a/src/chunk.hpp b/src/chunk.hpp
index 33cab10..59264fd 100644
--- a/src/chunk.hpp
+++ b/src/chunk.hpp
@@ -38,8 +38,6 @@
 #define SHRUB_TEXTURE       "res/image/shrub.png"
 #define SHRUB_TOP_TEXTURE   "res/image/shrub_top.png"
 
-static constexpr int WATER_LEVEL = 20;
-
 namespace app {
 
 struct Block {
@@ -50,6 +48,9 @@ class Chunk {
 
   public:
 
+    static constexpr int WATER_LEVEL = 20;
+    static constexpr glm::ivec3 CHUNK_SIZE{32, 256, 32};
+
     static void load();
     static void unload();
     static std::vector<xe::Image*>& getTextures();
diff --git a/src/first_app.cpp b/src/first_app.cpp
index eb24587..f6a9d57 100755
--- a/src/first_app.cpp
+++ b/src/first_app.cpp
@@ -62,8 +62,8 @@ void FirstApp::createGameObjects(xe::GameObject& viewer) {
 }
 
 void FirstApp::reloadLoadedChunks(xe::GameObject& viewer) {
-  viewX = static_cast<int>(floor(viewer.transform.translation.x / 16.f));
-  viewZ = static_cast<int>(floor(viewer.transform.translation.z / 16.f));
+  viewX = static_cast<int>(floor(viewer.transform.translation.x / Chunk::CHUNK_SIZE.x));
+  viewZ = static_cast<int>(floor(viewer.transform.translation.z / Chunk::CHUNK_SIZE.z));
   int width = 2*RENDER_DISTANCE+1;
   int minX = viewX - RENDER_DISTANCE;
   int minZ = viewZ - RENDER_DISTANCE;
@@ -72,8 +72,8 @@ void FirstApp::reloadLoadedChunks(xe::GameObject& viewer) {
   for(int32_t x = 0; x < width; x++) {
     for(int32_t z = 0; z < width; z++) {
       auto& gameObject = loadedChunks[x + z * width];
-      int gridX = static_cast<int>(floor(gameObject.transform.translation.x / 16.f));
-      int gridZ = static_cast<int>(floor(gameObject.transform.translation.z / 16.f));
+      int gridX = static_cast<int>(floor(gameObject.transform.translation.x / Chunk::CHUNK_SIZE.x));
+      int gridZ = static_cast<int>(floor(gameObject.transform.translation.z / Chunk::CHUNK_SIZE.z));
       int newGridX = minX + x;
       int newGridZ = minZ + z;
       if(gridX < minX || gridZ < minZ || gridX > maxX || gridZ > maxZ)
@@ -87,7 +87,7 @@ void FirstApp::reloadLoadedChunks(xe::GameObject& viewer) {
         Chunk::createMeshAsync(chunk);
       }
       gameObject.model = chunk->getMesh();
-      gameObject.transform.translation = glm::vec3(newGridX * 16.f, 0, newGridZ * 16.f);
+      gameObject.transform.translation = glm::vec3(newGridX * Chunk::CHUNK_SIZE.x, 0, newGridZ * Chunk::CHUNK_SIZE.z);
     }
   }
 }