com.github.skjolberg.packing.Placement Maven / Gradle / Ivy

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Library for 3D rectangular bin packing

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package com.github.skjolberg.packing;

/**
 * Placement as in box in a space.
 *
 * The box does not necessarily fill the whole space.
 */

public class Placement {

	private Space space;
	private Box box;

	public Placement(Space space, Box box) {
		this.space = space;
		this.box = box;
	}

	public Placement(Space space) {
		this.space = space;
	}

	public Space getSpace() {
		return space;
	}

	public Box getBox() {
		return box;
	}

	public void setBox(Box box) {
		this.box = box;
	}

	@Override
	public String toString() {
		return "Placement [" + space.getX() + "x" + space.getY() + "x" + space.getZ() + ", width=" + box.getWidth() + ", depth=" + box.getDepth() + ", height="
				+ box.getHeight() + "]";
	}

	int getCenterX() {
		return space.getX() + (box.getWidth() / 2);
	}

	int getCenterY() {
		return space.getY() + (box.getDepth() / 2);
	}

	int getCenterZ() {
		return space.getZ() + (box.getHeight() / 2);
	}

	boolean intersects(Placement placement) {
		return intersectsX(placement) && intersectsY(placement) && intersectsZ(placement);
	}

	private boolean intersectsY(Placement placement) {

		int startY = space.getY();
		int endY = startY + box.getDepth() - 1;

		if (startY <= placement.getSpace().getY() && placement.getSpace().getY() <= endY) {
			return true;
		}

		return startY <= placement.getSpace().getY() + placement.getBox().getDepth() - 1 &&
				placement.getSpace().getY() + placement.getBox().getDepth() - 1 <= endY;

	}

	private boolean intersectsX(Placement placement) {

		int startX = space.getX();
		int endX = startX + box.getWidth() - 1;

		if (startX <= placement.getSpace().getX() && placement.getSpace().getX() <= endX) {
			return true;
		}

		return startX <= placement.getSpace().getX() + placement.getBox().getWidth() - 1 &&
				placement.getSpace().getX() + placement.getBox().getWidth() - 1 <= endX;

	}
	
	private boolean intersectsZ(Placement placement) {

		int startZ = space.getZ();
		int endZ = startZ + box.getHeight() - 1;

		if (startZ <= placement.getSpace().getZ() && placement.getSpace().getZ() <= endZ) {
			return true;
		}

		return startZ <= placement.getSpace().getZ() + placement.getBox().getHeight() - 1 &&
				placement.getSpace().getZ() + placement.getBox().getHeight() - 1 <= endZ;

	}	
}