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