package net.minecraft.world;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.Vec3Pool;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraft.world.chunk.Chunk;
public class ChunkCache implements IBlockAccess
{
private int chunkX;
private int chunkZ;
private Chunk[][] chunkArray;
/** set by !chunk.getAreLevelsEmpty */
private boolean hasExtendedLevels;
/** Reference to the World object. */
private World worldObj;
public ChunkCache(World par1World, int par2, int par3, int par4, int par5, int par6, int par7, int par8)
{
this.worldObj = par1World;
this.chunkX = par2 - par8 >> 4;
this.chunkZ = par4 - par8 >> 4;
int l1 = par5 + par8 >> 4;
int i2 = par7 + par8 >> 4;
this.chunkArray = new Chunk[l1 - this.chunkX + 1][i2 - this.chunkZ + 1];
this.hasExtendedLevels = true;
int j2;
int k2;
Chunk chunk;
for (j2 = this.chunkX; j2 <= l1; ++j2)
{
for (k2 = this.chunkZ; k2 <= i2; ++k2)
{
chunk = par1World.getChunkFromChunkCoords(j2, k2);
if (chunk != null)
{
this.chunkArray[j2 - this.chunkX][k2 - this.chunkZ] = chunk;
}
}
}
for (j2 = par2 >> 4; j2 <= par5 >> 4; ++j2)
{
for (k2 = par4 >> 4; k2 <= par7 >> 4; ++k2)
{
chunk = this.chunkArray[j2 - this.chunkX][k2 - this.chunkZ];
if (chunk != null && !chunk.getAreLevelsEmpty(par3, par6))
{
this.hasExtendedLevels = false;
}
}
}
}
@SideOnly(Side.CLIENT)
/**
* set by !chunk.getAreLevelsEmpty
*/
public boolean extendedLevelsInChunkCache()
{
return this.hasExtendedLevels;
}
/**
* Returns the block ID at coords x,y,z
*/
public int getBlockId(int par1, int par2, int par3)
{
if (par2 < 0)
{
return 0;
}
else if (par2 >= 256)
{
return 0;
}
else
{
int l = (par1 >> 4) - this.chunkX;
int i1 = (par3 >> 4) - this.chunkZ;
if (l >= 0 && l < this.chunkArray.length && i1 >= 0 && i1 < this.chunkArray[l].length)
{
Chunk chunk = this.chunkArray[l][i1];
return chunk == null ? 0 : chunk.getBlockID(par1 & 15, par2, par3 & 15);
}
else
{
return 0;
}
}
}
/**
* Returns the TileEntity associated with a given block in X,Y,Z coordinates, or null if no TileEntity exists
*/
public TileEntity getBlockTileEntity(int par1, int par2, int par3)
{
int l = (par1 >> 4) - this.chunkX;
int i1 = (par3 >> 4) - this.chunkZ;
if (l >= 0 && l < this.chunkArray.length && i1 >= 0 && i1 < this.chunkArray[l].length)
{
Chunk chunk = this.chunkArray[l][i1];
return chunk == null ? null : chunk.getChunkBlockTileEntity(par1 & 15, par2, par3 & 15);
}
else
{
return null;
}
}
@SideOnly(Side.CLIENT)
public float getBrightness(int par1, int par2, int par3, int par4)
{
int i1 = this.getLightValue(par1, par2, par3);
if (i1 < par4)
{
i1 = par4;
}
return this.worldObj.provider.lightBrightnessTable[i1];
}
@SideOnly(Side.CLIENT)
/**
* Any Light rendered on a 1.8 Block goes through here
*/
public int getLightBrightnessForSkyBlocks(int par1, int par2, int par3, int par4)
{
int i1 = this.getSkyBlockTypeBrightness(EnumSkyBlock.Sky, par1, par2, par3);
int j1 = this.getSkyBlockTypeBrightness(EnumSkyBlock.Block, par1, par2, par3);
if (j1 < par4)
{
j1 = par4;
}
return i1 << 20 | j1 << 4;
}
/**
* Returns the block metadata at coords x,y,z
*/
public int getBlockMetadata(int par1, int par2, int par3)
{
if (par2 < 0)
{
return 0;
}
else if (par2 >= 256)
{
return 0;
}
else
{
int l = (par1 >> 4) - this.chunkX;
int i1 = (par3 >> 4) - this.chunkZ;
if (l >= 0 && l < this.chunkArray.length && i1 >= 0 && i1 < this.chunkArray[l].length)
{
Chunk chunk = this.chunkArray[l][i1];
return chunk == null ? 0 : chunk.getBlockMetadata(par1 & 15, par2, par3 & 15);
}
return 0;
}
}
@SideOnly(Side.CLIENT)
/**
* Returns how bright the block is shown as which is the block's light value looked up in a lookup table (light
* values aren't linear for brightness). Args: x, y, z
*/
public float getLightBrightness(int par1, int par2, int par3)
{
return this.worldObj.provider.lightBrightnessTable[this.getLightValue(par1, par2, par3)];
}
@SideOnly(Side.CLIENT)
/**
* Gets the light value of the specified block coords. Args: x, y, z
*/
public int getLightValue(int par1, int par2, int par3)
{
return this.getLightValueExt(par1, par2, par3, true);
}
@SideOnly(Side.CLIENT)
/**
* Get light value with flag
*/
public int getLightValueExt(int par1, int par2, int par3, boolean par4)
{
if (par1 >= -30000000 && par3 >= -30000000 && par1 < 30000000 && par3 <= 30000000)
{
int l;
int i1;
if (par4)
{
l = this.getBlockId(par1, par2, par3);
if (l == Block.stoneSingleSlab.blockID || l == Block.woodSingleSlab.blockID || l == Block.tilledField.blockID || l == Block.stairsWoodOak.blockID || l == Block.stairsCobblestone.blockID)
{
i1 = this.getLightValueExt(par1, par2 + 1, par3, false);
int j1 = this.getLightValueExt(par1 + 1, par2, par3, false);
int k1 = this.getLightValueExt(par1 - 1, par2, par3, false);
int l1 = this.getLightValueExt(par1, par2, par3 + 1, false);
int i2 = this.getLightValueExt(par1, par2, par3 - 1, false);
if (j1 > i1)
{
i1 = j1;
}
if (k1 > i1)
{
i1 = k1;
}
if (l1 > i1)
{
i1 = l1;
}
if (i2 > i1)
{
i1 = i2;
}
return i1;
}
}
if (par2 < 0)
{
return 0;
}
else if (par2 >= 256)
{
l = 15 - this.worldObj.skylightSubtracted;
if (l < 0)
{
l = 0;
}
return l;
}
else
{
l = (par1 >> 4) - this.chunkX;
i1 = (par3 >> 4) - this.chunkZ;
return this.chunkArray[l][i1].getBlockLightValue(par1 & 15, par2, par3 & 15, this.worldObj.skylightSubtracted);
}
}
else
{
return 15;
}
}
/**
* Returns the block's material.
*/
public Material getBlockMaterial(int par1, int par2, int par3)
{
int l = this.getBlockId(par1, par2, par3);
return l == 0 ? Material.air : Block.blocksList[l].blockMaterial;
}
@SideOnly(Side.CLIENT)
/**
* Gets the biome for a given set of x/z coordinates
*/
public BiomeGenBase getBiomeGenForCoords(int par1, int par2)
{
return this.worldObj.getBiomeGenForCoords(par1, par2);
}
@SideOnly(Side.CLIENT)
/**
* Returns true if the block at the specified coordinates is an opaque cube. Args: x, y, z
*/
public boolean isBlockOpaqueCube(int par1, int par2, int par3)
{
Block block = Block.blocksList[this.getBlockId(par1, par2, par3)];
return block == null ? false : block.isOpaqueCube();
}
/**
* Indicate if a material is a normal solid opaque cube.
*/
public boolean isBlockNormalCube(int par1, int par2, int par3)
{
Block block = Block.blocksList[this.getBlockId(par1, par2, par3)];
return block == null ? false : block.blockMaterial.blocksMovement() && block.renderAsNormalBlock();
}
@SideOnly(Side.CLIENT)
/**
* Returns true if the block at the given coordinate has a solid (buildable) top surface.
*/
public boolean doesBlockHaveSolidTopSurface(int par1, int par2, int par3)
{
return this.worldObj.doesBlockHaveSolidTopSurface(par1, par2, par3);
}
/**
* Return the Vec3Pool object for this world.
*/
public Vec3Pool getWorldVec3Pool()
{
return this.worldObj.getWorldVec3Pool();
}
@SideOnly(Side.CLIENT)
/**
* Returns true if the block at the specified coordinates is empty
*/
public boolean isAirBlock(int par1, int par2, int par3)
{
Block block = Block.blocksList[this.getBlockId(par1, par2, par3)];
return block == null;
}
@SideOnly(Side.CLIENT)
/**
* Brightness for SkyBlock.Sky is clear white and (through color computing it is assumed) DEPENDENT ON DAYTIME.
* Brightness for SkyBlock.Block is yellowish and independent.
*/
public int getSkyBlockTypeBrightness(EnumSkyBlock par1EnumSkyBlock, int par2, int par3, int par4)
{
if (par3 < 0)
{
par3 = 0;
}
if (par3 >= 256)
{
par3 = 255;
}
if (par3 >= 0 && par3 < 256 && par2 >= -30000000 && par4 >= -30000000 && par2 < 30000000 && par4 <= 30000000)
{
if (par1EnumSkyBlock == EnumSkyBlock.Sky && this.worldObj.provider.hasNoSky)
{
return 0;
}
else
{
int l;
int i1;
if (Block.useNeighborBrightness[this.getBlockId(par2, par3, par4)])
{
l = this.getSpecialBlockBrightness(par1EnumSkyBlock, par2, par3 + 1, par4);
i1 = this.getSpecialBlockBrightness(par1EnumSkyBlock, par2 + 1, par3, par4);
int j1 = this.getSpecialBlockBrightness(par1EnumSkyBlock, par2 - 1, par3, par4);
int k1 = this.getSpecialBlockBrightness(par1EnumSkyBlock, par2, par3, par4 + 1);
int l1 = this.getSpecialBlockBrightness(par1EnumSkyBlock, par2, par3, par4 - 1);
if (i1 > l)
{
l = i1;
}
if (j1 > l)
{
l = j1;
}
if (k1 > l)
{
l = k1;
}
if (l1 > l)
{
l = l1;
}
return l;
}
else
{
l = (par2 >> 4) - this.chunkX;
i1 = (par4 >> 4) - this.chunkZ;
return this.chunkArray[l][i1].getSavedLightValue(par1EnumSkyBlock, par2 & 15, par3, par4 & 15);
}
}
}
else
{
return par1EnumSkyBlock.defaultLightValue;
}
}
@SideOnly(Side.CLIENT)
/**
* is only used on stairs and tilled fields
*/
public int getSpecialBlockBrightness(EnumSkyBlock par1EnumSkyBlock, int par2, int par3, int par4)
{
if (par3 < 0)
{
par3 = 0;
}
if (par3 >= 256)
{
par3 = 255;
}
if (par3 >= 0 && par3 < 256 && par2 >= -30000000 && par4 >= -30000000 && par2 < 30000000 && par4 <= 30000000)
{
int l = (par2 >> 4) - this.chunkX;
int i1 = (par4 >> 4) - this.chunkZ;
return this.chunkArray[l][i1].getSavedLightValue(par1EnumSkyBlock, par2 & 15, par3, par4 & 15);
}
else
{
return par1EnumSkyBlock.defaultLightValue;
}
}
@SideOnly(Side.CLIENT)
/**
* Returns current world height.
*/
public int getHeight()
{
return 256;
}
/**
* Is this block powering in the specified direction Args: x, y, z, direction
*/
public int isBlockProvidingPowerTo(int par1, int par2, int par3, int par4)
{
int i1 = this.getBlockId(par1, par2, par3);
return i1 == 0 ? 0 : Block.blocksList[i1].isProvidingStrongPower(this, par1, par2, par3, par4);
}
}