Advancec Frustum Culling & fixes

src/voxels/Chunk.cpp

@@ -3,6 +3,8 @@
 #include "../lighting/Lightmap.h"
 
 Chunk::Chunk(int xpos, int zpos) : x(xpos), z(zpos){
+	bottom = 0;
+	top = CHUNK_H;
 	voxels = new voxel[CHUNK_VOL];
 	for (size_t i = 0; i < CHUNK_VOL; i++) {
 		voxels[i].id = 2;
@@ -30,6 +32,22 @@ bool Chunk::isEmpty(){
 	return true;
 }
 
+void Chunk::updateHeights() {
+	for (int i = 0; i < CHUNK_VOL; i++) {
+		if (voxels[i].id != 0) {
+			bottom = i / (CHUNK_D * CHUNK_W);
+			break;
+		}
+	}
+
+	for (int i = CHUNK_VOL - 1; i > -1; i--) {
+		if (voxels[i].id != 0) {
+			top = i / (CHUNK_D * CHUNK_W) + 1;
+			break;
+		}
+	}
+}
+
 Chunk* Chunk::clone() const {
 	Chunk* other = new Chunk(x,z);
 	for (int i = 0; i < CHUNK_VOL; i++)

src/voxels/Chunk.h

@@ -26,6 +26,7 @@ struct RenderData {
 class Chunk {
 public:
 	int x, z;
+	int bottom, top;
 	voxel* voxels;
 	Lightmap* lightmap;
 	int flags = 0;
@@ -37,6 +38,8 @@ public:
 
 	bool isEmpty();
 
+	void updateHeights();
+
 	Chunk* clone() const;
 
 	// flags getters/setters below

src/voxels/Chunks.cpp

@@ -139,6 +139,10 @@ void Chunks::set(int x, int y, int z, int id, uint8_t states){
 	chunk->setUnsaved(true);
 	chunk->setModified(true);
 
+	if (y < chunk->bottom) chunk->bottom = y;
+	else if (y + 1 > chunk->top) chunk->top = y + 1;
+	else if (id == 0) chunk->updateHeights();
+
 	if (lx == 0 && (chunk = getChunk(cx+ox-1, cz+oz))) chunk->setModified(true);
 	if (lz == 0 && (chunk = getChunk(cx+ox, cz+oz-1))) chunk->setModified(true);
 

src/voxels/Chunks.h

@@ -19,6 +19,7 @@ public:
 	std::shared_ptr<Chunk>* chunksSecond;
 	size_t volume;
 	size_t chunksCount;
+	size_t visible;
 	int w,d;
 	int ox,oz;
 	WorldFiles* worldFiles;

src/voxels/ChunksController.cpp

@@ -116,6 +116,8 @@ bool ChunksController::loadVisible(){
 		chunk->setUnsaved(true);
 	}
 
+	chunk->updateHeights();
+
 	for (size_t i = 0; i < CHUNK_VOL; i++) {
 		blockid_t id = chunk->voxels[i].id;
 		if (Block::blocks[id] == nullptr) {