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package net.ess3.utils;
import java.util.*;
import static net.ess3.I18n._;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.block.Block;
import org.bukkit.entity.LivingEntity;
public class LocationUtil
{
// The player can stand inside these materials
private static final Set<Integer> AIR_MATERIALS = new HashSet<Integer>();
private static final HashSet<Byte> AIR_MATERIALS_TARGET = new HashSet<Byte>();
static
{
AIR_MATERIALS.add(Material.AIR.getId());
AIR_MATERIALS.add(Material.SAPLING.getId());
AIR_MATERIALS.add(Material.POWERED_RAIL.getId());
AIR_MATERIALS.add(Material.DETECTOR_RAIL.getId());
AIR_MATERIALS.add(Material.LONG_GRASS.getId());
AIR_MATERIALS.add(Material.DEAD_BUSH.getId());
AIR_MATERIALS.add(Material.YELLOW_FLOWER.getId());
AIR_MATERIALS.add(Material.RED_ROSE.getId());
AIR_MATERIALS.add(Material.BROWN_MUSHROOM.getId());
AIR_MATERIALS.add(Material.RED_MUSHROOM.getId());
AIR_MATERIALS.add(Material.TORCH.getId());
AIR_MATERIALS.add(Material.REDSTONE_WIRE.getId());
AIR_MATERIALS.add(Material.SEEDS.getId());
AIR_MATERIALS.add(Material.SIGN_POST.getId());
AIR_MATERIALS.add(Material.WOODEN_DOOR.getId());
AIR_MATERIALS.add(Material.LADDER.getId());
AIR_MATERIALS.add(Material.RAILS.getId());
AIR_MATERIALS.add(Material.WALL_SIGN.getId());
AIR_MATERIALS.add(Material.LEVER.getId());
AIR_MATERIALS.add(Material.STONE_PLATE.getId());
AIR_MATERIALS.add(Material.IRON_DOOR_BLOCK.getId());
AIR_MATERIALS.add(Material.WOOD_PLATE.getId());
AIR_MATERIALS.add(Material.REDSTONE_TORCH_OFF.getId());
AIR_MATERIALS.add(Material.REDSTONE_TORCH_ON.getId());
AIR_MATERIALS.add(Material.STONE_BUTTON.getId());
AIR_MATERIALS.add(Material.SUGAR_CANE_BLOCK.getId());
AIR_MATERIALS.add(Material.DIODE_BLOCK_OFF.getId());
AIR_MATERIALS.add(Material.DIODE_BLOCK_ON.getId());
AIR_MATERIALS.add(Material.TRAP_DOOR.getId());
AIR_MATERIALS.add(Material.PUMPKIN_STEM.getId());
AIR_MATERIALS.add(Material.MELON_STEM.getId());
AIR_MATERIALS.add(Material.VINE.getId());
AIR_MATERIALS.add(Material.NETHER_WARTS.getId());
AIR_MATERIALS.add(Material.WATER_LILY.getId());
for (Integer integer : AIR_MATERIALS)
{
AIR_MATERIALS_TARGET.add(integer.byteValue());
}
AIR_MATERIALS_TARGET.add((byte)Material.WATER.getId());
AIR_MATERIALS_TARGET.add((byte)Material.STATIONARY_WATER.getId());
}
public static Location getTarget(final LivingEntity entity) throws Exception
{
final Block block = entity.getTargetBlock(AIR_MATERIALS_TARGET, 300);
if (block == null)
{
throw new Exception("Not targeting a block");
}
return block.getLocation();
}
public final static int RADIUS = 3;
public final static Vector3D[] VOLUME;
public static class Vector3D
{
public Vector3D(int x, int y, int z)
{
this.x = x;
this.y = y;
this.z = z;
}
public int x;
public int y;
public int z;
}
static
{
List<Vector3D> pos = new ArrayList<Vector3D>();
for (int x = -RADIUS; x <= RADIUS; x++)
{
for (int y = -RADIUS; y <= RADIUS; y++)
{
for (int z = -RADIUS; z <= RADIUS; z++)
{
pos.add(new Vector3D(x, y, z));
}
}
}
Collections.sort(
pos, new Comparator<Vector3D>()
{
@Override
public int compare(Vector3D a, Vector3D b)
{
return (a.x * a.x + a.y * a.y + a.z * a.z) - (b.x * b.x + b.y * b.y + b.z * b.z);
}
});
VOLUME = pos.toArray(new Vector3D[0]);
}
public static Location getSafeDestination(final Location loc) throws Exception
{
if (loc == null || loc.getWorld() == null)
{
throw new Exception(_("destinationNotSet"));
}
final World world = loc.getWorld();
int x = loc.getBlockX();
int y = (int)Math.round(loc.getY());
int z = loc.getBlockZ();
final int origX = x;
final int origY = y;
final int origZ = z;
while (isBlockAboveAir(world, x, y, z))
{
y -= 1;
if (y < 0)
{
y = origY;
break;
}
}
int i = 0;
while (isBlockUnsafe(world, x, y, z))
{
i++;
if (i >= VOLUME.length)
{
x = origX;
y = origY + RADIUS;
z = origZ;
break;
}
x = origX + VOLUME[i].x;
y = origY + VOLUME[i].y;
z = origZ + VOLUME[i].z;
}
while (isBlockUnsafe(world, x, y, z))
{
y += 1;
if (y >= world.getMaxHeight())
{
x += 1;
break;
}
}
while (isBlockUnsafe(world, x, y, z))
{
y -= 1;
if (y <= 1)
{
x += 1;
y = world.getHighestBlockYAt(x, z);
if (x - 48 > loc.getBlockX())
{
throw new Exception(_("holeInFloor"));
}
}
}
return new Location(world, x + 0.5D, y, z + 0.5D, loc.getYaw(), loc.getPitch());
}
private static boolean isBlockAboveAir(final World world, final int x, final int y, final int z)
{
return AIR_MATERIALS.contains(world.getBlockAt(x, y - 1, z).getType().getId());
}
public static boolean isBlockUnsafe(final World world, final int x, final int y, final int z)
{
if (isBlockDamaging(world, x, y, z))
{
return true;
}
return isBlockAboveAir(world, x, y, z);
}
public static boolean isBlockDamaging(final World world, final int x, final int y, final int z)
{
final Block below = world.getBlockAt(x, y - 1, z);
if (below.getType() == Material.LAVA || below.getType() == Material.STATIONARY_LAVA)
{
return true;
}
if (below.getType() == Material.FIRE)
{
return true;
}
if (below.getType() == Material.BED_BLOCK)
{
return true;
}
if ((!AIR_MATERIALS.contains(world.getBlockAt(x, y, z).getType().getId())) || (!AIR_MATERIALS.contains(
world.getBlockAt(x, y + 1, z).getType().getId())))
{
return true;
}
return false;
}
}
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