/*
* This file is part of Skript.
*
* Skript is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Skript is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Skript. If not, see <http://www.gnu.org/licenses/>.
*
*
* Copyright 2011-2014 Peter Güttinger
*
*/
package ch.njol.skript.expressions;
import org.bukkit.block.Block;
import org.bukkit.block.BlockFace;
import org.bukkit.entity.LivingEntity;
import org.bukkit.event.Event;
import org.bukkit.material.Directional;
import org.bukkit.material.MaterialData;
import org.bukkit.util.Vector;
import org.eclipse.jdt.annotation.Nullable;
import ch.njol.skript.classes.Changer.ChangeMode;
import ch.njol.skript.doc.Description;
import ch.njol.skript.doc.Examples;
import ch.njol.skript.doc.Name;
import ch.njol.skript.doc.Since;
import ch.njol.skript.expressions.base.SimplePropertyExpression;
import ch.njol.skript.lang.Expression;
import ch.njol.skript.lang.SkriptParser.ParseResult;
import ch.njol.skript.util.Direction;
import ch.njol.util.Kleenean;
import ch.njol.util.coll.CollectionUtils;
/**
* @author Peter Güttinger
*/
@Name("Facing")
@Description("The facing of an entity or block, i.e. exactly north, south, east, west, up or down (unlike <a href='#ExprDirection'>direction</a> which is the exact direction, e.g. '0.5 south and 0.7 east')")
@Examples({"# makes a bridge",
"loop blocks from the block below the player in the horizontal facing of the player:",
" set block to cobblestone"})
@Since("1.4")
public class ExprFacing extends SimplePropertyExpression<Object, Direction> {
static {
register(ExprFacing.class, Direction.class, "(1¦horizontal|) facing", "livingentities/blocks");
}
private boolean horizontal;
@Override
public boolean init(final Expression<?>[] exprs, final int matchedPattern, final Kleenean isDelayed, final ParseResult parseResult) {
horizontal = parseResult.mark == 1;
return super.init(exprs, matchedPattern, isDelayed, parseResult);
}
@SuppressWarnings({"deprecation", "null"})
@Override
@Nullable
public Direction convert(final Object o) {
if (o instanceof Block) {
final MaterialData d = ((Block) o).getType().getNewData(((Block) o).getData());
if (d instanceof Directional)
return new Direction(((Directional) d).getFacing(), 1);
return null;
} else if (o instanceof LivingEntity) {
return new Direction(Direction.getFacing(((LivingEntity) o).getLocation(), horizontal), 1);
}
assert false;
return null;
}
@Override
protected String getPropertyName() {
return (horizontal ? "horizontal " : "") + "facing";
}
@Override
public Class<Direction> getReturnType() {
return Direction.class;
}
@SuppressWarnings("unchecked")
@Override
@Nullable
public Class<?>[] acceptChange(final ChangeMode mode) {
if (!Block.class.isAssignableFrom(getExpr().getReturnType()))
return null;
if (mode == ChangeMode.SET)
return CollectionUtils.array(Direction.class);
return null;
}
@SuppressWarnings("deprecation")
@Override
public void change(final Event e, final @Nullable Object[] delta, final ChangeMode mode) throws UnsupportedOperationException {
assert mode == ChangeMode.SET;
assert delta != null;
final Block b = (Block) getExpr().getSingle(e);
if (b == null)
return;
final MaterialData d = b.getType().getNewData(b.getData());
if (!(d instanceof Directional))
return;
((Directional) d).setFacingDirection(toBlockFace(((Direction) delta[0]).getDirection(b)));
b.setData(d.getData());
}
private final static BlockFace toBlockFace(final Vector dir) {
// dir.normalize();
BlockFace r = null;
double d = Double.MAX_VALUE;
for (final BlockFace f : BlockFace.values()) {
final double a = Math.pow(f.getModX() - dir.getX(), 2) + Math.pow(f.getModY() - dir.getY(), 2) + Math.pow(f.getModZ() - dir.getZ(), 2);
if (a < d) {
d = a;
r = f;
}
}
assert r != null;
return r;
}
}