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package gregtech.api.util;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import net.minecraft.block.Block;
import net.minecraft.client.Minecraft;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.ChunkCoordIntPair;
import net.minecraft.world.ChunkPosition;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.common.util.ForgeDirection;
import net.minecraftforge.event.world.ChunkEvent;
import net.minecraftforge.event.world.WorldEvent;
import cpw.mods.fml.common.FMLCommonHandler;
import cpw.mods.fml.common.eventhandler.EventPriority;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.common.gameevent.TickEvent;
/**
* Provide a fake IBlockAccess to support CTM. Facade are supposed to set these when they are placed/received by client.
*/
public class GT_RenderingWorld implements IBlockAccess {
private static final GT_RenderingWorld INSTANCE = new GT_RenderingWorld();
/*
* I do not think this map would ever grow too huge, so I won't go too overcomplicated on this one
*/
private final Map<ChunkPosition, BlockInfo> infos = new HashMap<>();
private final Map<ChunkCoordIntPair, Set<ChunkPosition>> index = new HashMap<>();
private IBlockAccess mWorld = Minecraft.getMinecraft().theWorld;
private GT_RenderingWorld() {
new FMLEventHandler();
new ForgeEventHandler();
}
public static GT_RenderingWorld getInstance() {
return INSTANCE;
}
public static GT_RenderingWorld getInstance(IBlockAccess aWorld) {
if (aWorld == INSTANCE) return INSTANCE;
if (aWorld == null) INSTANCE.mWorld = Minecraft.getMinecraft().theWorld;
else INSTANCE.mWorld = aWorld;
return INSTANCE;
}
private void setWorld(IBlockAccess aWorld) {
if (aWorld == null) mWorld = Minecraft.getMinecraft().theWorld;
else mWorld = aWorld;
}
public void register(int x, int y, int z, Block block, int meta) {
ChunkPosition key = new ChunkPosition(x, y, z);
infos.put(key, new BlockInfo(block, meta));
index.computeIfAbsent(new ChunkCoordIntPair(x >> 4, z >> 4), p -> new HashSet<>())
.add(key);
}
public void unregister(int x, int y, int z, Block block, int meta) {
ChunkPosition key = new ChunkPosition(x, y, z);
if (infos.remove(key, new BlockInfo(block, meta))) {
ChunkCoordIntPair chunkKey = new ChunkCoordIntPair(x >> 4, z >> 4);
Set<ChunkPosition> set = index.get(chunkKey);
set.remove(key);
if (set.isEmpty()) index.remove(chunkKey);
}
}
@Override
public Block getBlock(int p_147439_1_, int p_147439_2_, int p_147439_3_) {
BlockInfo blockInfo = infos.get(new ChunkPosition(p_147439_1_, p_147439_2_, p_147439_3_));
return blockInfo != null ? blockInfo.block : mWorld.getBlock(p_147439_1_, p_147439_2_, p_147439_3_);
}
@Override
public TileEntity getTileEntity(int p_147438_1_, int p_147438_2_, int p_147438_3_) {
return mWorld.getTileEntity(p_147438_1_, p_147438_2_, p_147438_3_);
}
@Override
public int getLightBrightnessForSkyBlocks(int p_72802_1_, int p_72802_2_, int p_72802_3_, int p_72802_4_) {
return mWorld.getLightBrightnessForSkyBlocks(p_72802_1_, p_72802_2_, p_72802_3_, p_72802_4_);
}
@Override
public int getBlockMetadata(int p_72805_1_, int p_72805_2_, int p_72805_3_) {
BlockInfo blockInfo = infos.get(new ChunkPosition(p_72805_1_, p_72805_2_, p_72805_3_));
return blockInfo != null ? blockInfo.meta : mWorld.getBlockMetadata(p_72805_1_, p_72805_2_, p_72805_3_);
}
@Override
public int isBlockProvidingPowerTo(int p_72879_1_, int p_72879_2_, int p_72879_3_, int p_72879_4_) {
return mWorld.isBlockProvidingPowerTo(p_72879_1_, p_72879_2_, p_72879_3_, p_72879_4_);
}
@Override
public boolean isAirBlock(int p_147437_1_, int p_147437_2_, int p_147437_3_) {
return getBlock(p_147437_1_, p_147437_2_, p_147437_3_).isAir(mWorld, p_147437_1_, p_147437_2_, p_147437_3_);
}
@Override
public BiomeGenBase getBiomeGenForCoords(int p_72807_1_, int p_72807_2_) {
return mWorld.getBiomeGenForCoords(p_72807_1_, p_72807_2_);
}
@Override
public int getHeight() {
return mWorld.getHeight();
}
@Override
public boolean extendedLevelsInChunkCache() {
return mWorld.extendedLevelsInChunkCache();
}
@Override
public boolean isSideSolid(int x, int y, int z, ForgeDirection side, boolean _default) {
return getBlock(x, y, z).isSideSolid(this, x, y, z, side);
}
public class FMLEventHandler {
public FMLEventHandler() {
FMLCommonHandler.instance()
.bus()
.register(this);
}
@SubscribeEvent(priority = EventPriority.HIGHEST)
public void onRenderTickStart(TickEvent.RenderTickEvent e) {
if (e.phase == TickEvent.Phase.START) mWorld = Minecraft.getMinecraft().theWorld;
}
}
public class ForgeEventHandler {
private ForgeEventHandler() {
MinecraftForge.EVENT_BUS.register(this);
}
@SubscribeEvent
public void onChunkUnloaded(ChunkEvent.Unload e) {
if (!e.world.isRemote) return;
Set<ChunkPosition> set = index.remove(
e.getChunk()
.getChunkCoordIntPair());
if (set != null) infos.keySet()
.removeAll(set);
}
@SubscribeEvent
public void onWorldUnloaded(WorldEvent.Unload e) {
if (!e.world.isRemote) return;
infos.clear();
index.clear();
}
}
private static class BlockInfo {
private final Block block;
private final int meta;
public BlockInfo(Block block, int meta) {
this.block = block;
this.meta = meta;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
BlockInfo blockInfo = (BlockInfo) o;
if (meta != blockInfo.meta) return false;
return Objects.equals(block, blockInfo.block);
}
@Override
public int hashCode() {
int result = block != null ? block.hashCode() : 0;
result = 31 * result + meta;
return result;
}
}
}
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