package net.minecraftforge.fluids; import java.util.Random; import net.minecraft.block.Block; import net.minecraft.block.material.Material; 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(int id, Fluid fluid, Material material) { super(id, 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.getBlockId(x, y, z) == 0) { return 0; } if (world.getBlockId(x, y, z) != blockID) { return -1; } int quantaRemaining = quantaPerBlock - world.getBlockMetadata(x, y, z); return quantaRemaining; } @Override public boolean canCollideCheck(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); } @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.getBlockId(x, y2, z ) == blockID || world.getBlockId(x - 1, y2, z ) == blockID || world.getBlockId(x + 1, y2, z ) == blockID || world.getBlockId(x, y2, z - 1) == blockID || world.getBlockId(x, y2, z + 1) == blockID) { 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.setBlockToAir(x, y, z); } else { world.setBlockMetadataWithNotify(x, y, z, quantaPerBlock - expQuanta, 3); world.scheduleBlockUpdate(x, y, z, blockID, tickRate); world.notifyBlocksOfNeighborChange(x, y, z, blockID); } } } // 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.getBlockId(x, y - densityDir, z) == blockID) { 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.getBlockId(x, y + densityDir, z) == blockID || (world.getBlockId(x, y, z) == blockID && canFlowInto(world, x, y + densityDir, z)); } public boolean isSourceBlock(IBlockAccess world, int x, int y, int z) { return world.getBlockId(x, y, z) == blockID && 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.blockID, meta, 3); } } protected boolean canFlowInto(IBlockAccess world, int x, int y, int z) { if (world.isAirBlock(x, y, z)) return true; int bId = world.getBlockId(x, y, z); if (bId == blockID) { return true; } if (displacementIds.containsKey(bId)) { return displacementIds.get(bId); } Material material = Block.blocksList[bId].blockMaterial; 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.setBlockToAir(x, y, z); } return stack.copy(); } @Override public boolean canDrain(World world, int x, int y, int z) { return isSourceBlock(world, x, y, z); } }