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package com.sosnitzka.taiga.util;
import com.google.common.base.Predicate;
import net.minecraft.block.properties.IProperty;
import net.minecraft.block.state.IBlockState;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
public class StateMatcher implements Predicate<IBlockState> {
private final IBlockState state;
private final IProperty property;
private final Comparable value;
private StateMatcher(IBlockState state, IProperty property, Comparable value) {
this.state = state;
this.property = property;
this.value = value;
}
static StateMatcher forState(IBlockState state, IProperty property, Comparable value) {
return new StateMatcher(state, property, value);
}
public boolean apply(IBlockState state, BlockPos pos, World world) {
if (state != null) {
if (property != null && value != null) {
if (state.getBlock() == this.state.getBlock())
return checkLayerForBlocks(3, 3, -1, world, pos) ||
checkLayerForBlocks(3, 3, 0, world, pos) ||
checkLayerForBlocks(3, 3, 1, world, pos);
} else
return state.getBlock() == this.state.getBlock();
}
return false;
}
@Override
public boolean apply(IBlockState input) {
if (state != null) {
if (property != null && value != null) {
return state.getBlock() == this.state.getBlock() && state.getValue(property) == value;
} else
return state.getBlock() == this.state.getBlock();
}
return false;
}
private boolean checkLayerForBlocks(int X, int Z, int Y, World world, BlockPos origin) {
int x = 0, z = 0, dx = 0, dz = -1;
int t = Math.max(X, Z);
int maxI = t * t;
for (int i = 0; i < maxI; i++) {
if ((-X / 2 <= x) && (x <= X / 2) && (-Z / 2 <= z) && (z <= Z / 2)) {
BlockPos blockPos = new BlockPos(origin.getX() + x, origin.getY() + Y, origin.getZ() + z);
if (blockPos == origin)
continue;
if (i % 2 == 0)
continue;
IBlockState bState = world.getBlockState(blockPos);
if (bState.getBlock() == this.state.getBlock() && bState.getValue(property) == value) {
return true;
}
}
if ((x == z) || ((x < 0) && (x == -z)) || ((x > 0) && (x == 1 - z))) {
t = dx;
dx = -dz;
dz = t;
}
x += dx;
z += dz;
}
return false;
}
}
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