package net.minecraftforge.fluids;
import java.util.Random;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.init.Blocks;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;
/**
* This is a fluid block implementation which emulates vanilla Minecraft fluid behavior.
*
* It is highly recommended that you use/extend this class for "classic" fluid blocks.
*
* @author King Lemming
*
*/
public class BlockFluidClassic extends BlockFluidBase
{
protected boolean[] isOptimalFlowDirection = new boolean[4];
protected int[] flowCost = new int[4];
protected FluidStack stack;
public BlockFluidClassic(Fluid fluid, Material material)
{
super(fluid, material);
stack = new FluidStack(fluid, FluidContainerRegistry.BUCKET_VOLUME);
}
public BlockFluidClassic setFluidStack(FluidStack stack)
{
this.stack = stack;
return this;
}
public BlockFluidClassic setFluidStackAmount(int amount)
{
this.stack.amount = amount;
return this;
}
@Override
public int getQuantaValue(IBlockAccess world, int x, int y, int z)
{
if (world.getBlock(x, y, z) == Blocks.air)
{
return 0;
}
if (world.getBlock(x, y, z) != this)
{
return -1;
}
int quantaRemaining = quantaPerBlock - world.getBlockMetadata(x, y, z);
return quantaRemaining;
}
/**
* Returns whether the raytracing must ignore this block. Args : metadata, stopOnLiquid
*/
@Override
public boolean canStopRayTrace(int meta, boolean fullHit)
{
return fullHit && meta == 0;
}
@Override
public int getMaxRenderHeightMeta()
{
return 0;
}
@Override
public int getLightValue(IBlockAccess world, int x, int y, int z)
{
if (maxScaledLight == 0)
{
return super.getLightValue(world, x, y, z);
}
int data = quantaPerBlock - world.getBlockMetadata(x, y, z) - 1;
return (int) (data / quantaPerBlockFloat * maxScaledLight);
}
/**
* Ticks the block if it's been scheduled
*/
@Override
public void updateTick(World world, int x, int y, int z, Random rand)
{
int quantaRemaining = quantaPerBlock - world.getBlockMetadata(x, y, z);
int expQuanta = -101;
// check adjacent block levels if non-source
if (quantaRemaining < quantaPerBlock)
{
int y2 = y - densityDir;
if (world.getBlock(x, y2, z ) == this ||
world.getBlock(x - 1, y2, z ) == this ||
world.getBlock(x + 1, y2, z ) == this ||
world.getBlock(x, y2, z - 1) == this ||
world.getBlock(x, y2, z + 1) == this)
{
expQuanta = quantaPerBlock - 1;
}
else
{
int maxQuanta = -100;
maxQuanta = getLargerQuanta(world, x - 1, y, z, maxQuanta);
maxQuanta = getLargerQuanta(world, x + 1, y, z, maxQuanta);
maxQuanta = getLargerQuanta(world, x, y, z - 1, maxQuanta);
maxQuanta = getLargerQuanta(world, x, y, z + 1, maxQuanta);
expQuanta = maxQuanta - 1;
}
// decay calculation
if (expQuanta != quantaRemaining)
{
quantaRemaining = expQuanta;
if (expQuanta <= 0)
{
world.setBlock(x, y, z, Blocks.air);
}
else
{
world.setBlockMetadataWithNotify(x, y, z, quantaPerBlock - expQuanta, 3);
world.scheduleBlockUpdate(x, y, z, this, tickRate);
world.notifyBlocksOfNeighborChange(x, y, z, this);
}
}
}
// This is a "source" block, set meta to zero, and send a server only update
else if (quantaRemaining >= quantaPerBlock)
{
world.setBlockMetadataWithNotify(x, y, z, 0, 2);
}
// Flow vertically if possible
if (canDisplace(world, x, y + densityDir, z))
{
flowIntoBlock(world, x, y + densityDir, z, 1);
return;
}
// Flow outward if possible
int flowMeta = quantaPerBlock - quantaRemaining + 1;
if (flowMeta >= quantaPerBlock)
{
return;
}
if (isSourceBlock(world, x, y, z) || !isFlowingVertically(world, x, y, z))
{
if (world.getBlock(x, y - densityDir, z) == this)
{
flowMeta = 1;
}
boolean flowTo[] = getOptimalFlowDirections(world, x, y, z);
if (flowTo[0]) flowIntoBlock(world, x - 1, y, z, flowMeta);
if (flowTo[1]) flowIntoBlock(world, x + 1, y, z, flowMeta);
if (flowTo[2]) flowIntoBlock(world, x, y, z - 1, flowMeta);
if (flowTo[3]) flowIntoBlock(world, x, y, z + 1, flowMeta);
}
}
public boolean isFlowingVertically(IBlockAccess world, int x, int y, int z)
{
return world.getBlock(x, y + densityDir, z) == this ||
(world.getBlock(x, y, z) == this && canFlowInto(world, x, y + densityDir, z));
}
public boolean isSourceBlock(IBlockAccess world, int x, int y, int z)
{
return world.getBlock(x, y, z) == this && world.getBlockMetadata(x, y, z) == 0;
}
protected boolean[] getOptimalFlowDirections(World world, int x, int y, int z)
{
for (int side = 0; side < 4; side++)
{
flowCost[side] = 1000;
int x2 = x;
int y2 = y;
int z2 = z;
switch (side)
{
case 0: --x2; break;
case 1: ++x2; break;
case 2: --z2; break;
case 3: ++z2; break;
}
if (!canFlowInto(world, x2, y2, z2) || isSourceBlock(world, x2, y2, z2))
{
continue;
}
if (canFlowInto(world, x2, y2 + densityDir, z2))
{
flowCost[side] = 0;
}
else
{
flowCost[side] = calculateFlowCost(world, x2, y2, z2, 1, side);
}
}
int min = flowCost[0];
for (int side = 1; side < 4; side++)
{
if (flowCost[side] < min)
{
min = flowCost[side];
}
}
for (int side = 0; side < 4; side++)
{
isOptimalFlowDirection[side] = flowCost[side] == min;
}
return isOptimalFlowDirection;
}
protected int calculateFlowCost(World world, int x, int y, int z, int recurseDepth, int side)
{
int cost = 1000;
for (int adjSide = 0; adjSide < 4; adjSide++)
{
if ((adjSide == 0 && side == 1) ||
(adjSide == 1 && side == 0) ||
(adjSide == 2 && side == 3) ||
(adjSide == 3 && side == 2))
{
continue;
}
int x2 = x;
int y2 = y;
int z2 = z;
switch (adjSide)
{
case 0: --x2; break;
case 1: ++x2; break;
case 2: --z2; break;
case 3: ++z2; break;
}
if (!canFlowInto(world, x2, y2, z2) || isSourceBlock(world, x2, y2, z2))
{
continue;
}
if (canFlowInto(world, x2, y2 + densityDir, z2))
{
return recurseDepth;
}
if (recurseDepth >= 4)
{
continue;
}
int min = calculateFlowCost(world, x2, y2, z2, recurseDepth + 1, adjSide);
if (min < cost)
{
cost = min;
}
}
return cost;
}
protected void flowIntoBlock(World world, int x, int y, int z, int meta)
{
if (meta < 0) return;
if (displaceIfPossible(world, x, y, z))
{
world.setBlock(x, y, z, this, meta, 3);
}
}
protected boolean canFlowInto(IBlockAccess world, int x, int y, int z)
{
if (world.getBlock(x, y, z).isAir(world, x, y, z)) return true;
Block block = world.getBlock(x, y, z);
if (block == this)
{
return true;
}
if (displacements.containsKey(block))
{
return displacements.get(block);
}
Material material = block.getMaterial();
if (material.blocksMovement() ||
material == Material.water ||
material == Material.lava ||
material == Material.portal)
{
return false;
}
int density = getDensity(world, x, y, z);
if (density == Integer.MAX_VALUE)
{
return true;
}
if (this.density > density)
{
return true;
}
else
{
return false;
}
}
protected int getLargerQuanta(IBlockAccess world, int x, int y, int z, int compare)
{
int quantaRemaining = getQuantaValue(world, x, y, z);
if (quantaRemaining <= 0)
{
return compare;
}
return quantaRemaining >= compare ? quantaRemaining : compare;
}
/* IFluidBlock */
@Override
public FluidStack drain(World world, int x, int y, int z, boolean doDrain)
{
if (!isSourceBlock(world, x, y, z))
{
return null;
}
if (doDrain)
{
world.setBlock(x, y, z, Blocks.air);
}
return stack.copy();
}
@Override
public boolean canDrain(World world, int x, int y, int z)
{
return isSourceBlock(world, x, y, z);
}
}