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package makamys.lodmod.renderer;
import java.util.List;
import makamys.lodmod.LODMod;
import net.minecraft.entity.Entity;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagEnd;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.world.chunk.Chunk;
public class LODChunk {
int x, z;
public boolean needsChunk = true;
int lod = 0;
boolean visible;
boolean dirty;
boolean discardedMesh;
SimpleChunkMesh[] simpleMeshes = new SimpleChunkMesh[2];
ChunkMesh[] chunkMeshes = new ChunkMesh[32];
public boolean[] hidden = new boolean[16];
LODRenderer renderer = LODMod.renderer;
public LODChunk(int x, int z) {
this.x = x;
this.z = z;
}
public LODChunk(NBTTagCompound nbt, List<String> spriteList) {
this.x = nbt.getInteger("x");
this.z = nbt.getInteger("z");
loadChunkMeshesNBT(nbt.getCompoundTag("chunkMeshes"), spriteList);
}
private void loadChunkMeshesNBT(NBTTagCompound chunkMeshesCompound, List<String> spriteList) {
for(Object o : chunkMeshesCompound.func_150296_c()) {
String key = (String)o;
int keyInt = Integer.parseInt(key);
byte[] data = chunkMeshesCompound.getByteArray(key);
chunkMeshes[keyInt] = new ChunkMesh(x, keyInt / 2, z, new ChunkMesh.Flags(true, true, true, false), data.length / (2 + 4 * (3 + 2 + 2 + 4)), data, spriteList, keyInt % 2);
}
}
@Override
public String toString() {
return "LODChunk(" + x + ", " + z + ")";
}
public double distSq(Entity entity) {
return Math.pow(entity.posX - x * 16, 2) + Math.pow(entity.posZ - z * 16, 2);
}
public void putChunkMeshes(int cy, List<ChunkMesh> newChunkMeshes) {
for(int i = 0; i < 2; i++) {
ChunkMesh newChunkMesh = newChunkMeshes.size() > i ? newChunkMeshes.get(i) : null;
if(chunkMeshes[cy * 2 + i] != null) {
if(newChunkMesh != null) {
newChunkMesh.pass = i;
}
renderer.setMeshVisible(chunkMeshes[cy * 2 + i], false);
chunkMeshes[cy * 2 + i].destroy();
}
chunkMeshes[cy * 2 + i] = newChunkMesh;
}
LODMod.renderer.lodChunkChanged(this);
dirty = true;
discardedMesh = false;
}
// nice copypasta
public void putSimpleMeshes(List<SimpleChunkMesh> newSimpleMeshes) {
for(int i = 0; i < 2; i++) {
SimpleChunkMesh newSimpleMesh = newSimpleMeshes.size() > i ? newSimpleMeshes.get(i) : null;
if(simpleMeshes[i] != null) {
if(newSimpleMesh != null) {
newSimpleMesh.pass = i;
}
renderer.setMeshVisible(simpleMeshes[i], false);
simpleMeshes[i].destroy();
}
simpleMeshes[i] = newSimpleMesh;
}
LODMod.renderer.lodChunkChanged(this);
}
public boolean hasChunkMeshes() {
for(ChunkMesh cm : chunkMeshes) {
if(cm != null) {
return true;
}
}
return false;
}
public void tick(Entity player) {
double distSq = distSq(player);
if(distSq < Math.pow((LODMod.renderer.renderRange / 2) * 16, 2)) {
setLOD(2);
} else if(distSq < Math.pow((LODMod.renderer.renderRange) * 16, 2)) {
setLOD(1);
} else {
setLOD(0);
}
}
public void setLOD(int lod) {
if(lod == this.lod) return;
this.lod = lod;
LODMod.renderer.lodChunkChanged(this);
if(!dirty) {
if(lod < 2) {
for(int i = 0; i < chunkMeshes.length; i++) {
if(chunkMeshes[i] != null) {
chunkMeshes[i].destroy();
chunkMeshes[i] = null;
discardedMesh = true;
}
}
}
}
}
public NBTTagCompound saveToNBT(NBTTagCompound oldNbt, List<String> oldStringTable) {
NBTTagCompound nbt = new NBTTagCompound();
nbt.setInteger("x", x);
nbt.setInteger("z", z);
NBTTagCompound chunkMeshesCompound = oldNbt == null ? new NBTTagCompound() : oldNbt.getCompoundTag("chunkMeshes");
if(!discardedMesh) {
for(int i = 0; i < chunkMeshes.length; i++) {
if(chunkMeshes[i] != null) {
chunkMeshesCompound.setTag(String.valueOf(i), chunkMeshes[i].nbtData);
}
}
} else if(oldNbt != null && discardedMesh && lod == 2) {
loadChunkMeshesNBT(chunkMeshesCompound, oldStringTable);
LODMod.renderer.lodChunkChanged(this);
}
nbt.setTag("chunkMeshes", chunkMeshesCompound);
dirty = false;
return nbt;
}
public void destroy() {
for(SimpleChunkMesh scm: simpleMeshes) {
if(scm != null) {
scm.destroy();
}
}
for(ChunkMesh cm: chunkMeshes) {
if(cm != null) {
cm.destroy();
}
}
LODMod.renderer.setVisible(this, false);
}
public void receiveChunk(Chunk chunk) {
putSimpleMeshes(SimpleChunkMesh.generateSimpleMeshes(chunk));
}
public boolean isFullyVisible() {
if(!visible) return false;
for(boolean b : hidden) {
if(b) {
return false;
}
}
return true;
}
public boolean isSubchunkVisible(int y) {
return !hidden[y];
}
}
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