package com.jotuntech.sketcher.common;

import java.awt.Point;
import java.awt.geom.Point2D;
import java.nio.ByteBuffer;

/**
 * Class for containing tablet input data.
 *
 * @author Thor Harald Johansen
 */
public class Input extends Point2D.Float implements Streamable {
	/** Pressure axis */
	public int pressure = 0;

	/** Creates a new input. */
	public Input() {

	}

	public Input(float x, float y) {
		super(x, y);
	}

	public Input(float x, float y, int pressure) {
		this.x = x;
		this.y = y;
		this.pressure = pressure;
	}

	public Input(Point p) {
		x = p.x;
		y = p.y;
	}

	public Input(Point p, int pressure) {
		x = p.x;
		y = p.y;
		this.pressure = pressure;
	}

	/**
	 * Calculates the difference between the input and the argument such that if
	 * one axis of the input is greater than one axis of the argument, the
	 * resultant axis will be negative.
	 *
	 * @param d Input to calculate difference against.
	 * @return Difference of inputs.
	 */
	public Input difference(Input d) {
		return new Input(d.x - x, d.y - y, (d.pressure + pressure) >> 1);
	}

	public Input clone() {
		return new Input(x, y, pressure);
	}

	public void decode(ByteBuffer in) {
		x = in.getFloat();
		y = in.getFloat();
		pressure = in.getInt();
	}

	public void encode(ByteBuffer out) {
		out.putFloat(x);
		out.putFloat(y);
		out.putInt(pressure);
	}
}