/*******************************************************************************
 * Breakout Cave Survey Visualizer
 *
 * Copyright (C) 2014 James Edwards
 *
 * jedwards8 at fastmail dot fm
 *
 * This program 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 2 of the License, or (at your option) any later
 * version.
 *
 * This program 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
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *******************************************************************************/
package org.andork.jogl.awt.anim;

import org.andork.awt.anim.Animation;
import org.andork.jogl.JoglViewSettings;
import org.andork.math3d.Vecmath;
import org.andork.util.AnimationUtils;

import com.jogamp.opengl.GLAutoDrawable;

public class SpringViewTranslationAnimation implements Animation {

	JoglViewSettings viewSettings;

	GLAutoDrawable drawable;
	final float[] target = new float[3];

	final float[] v = Vecmath.newMat4f();

	int period;

	float factor;

	float extra;

	public SpringViewTranslationAnimation(GLAutoDrawable drawable, JoglViewSettings viewSettings, float[] target,
			float factor, float extra, int period) {
		if (period <= 0) {
			throw new IllegalArgumentException("period must be > 0");
		}
		this.viewSettings = viewSettings;
		this.drawable = drawable;
		Vecmath.setf(this.target, target);
		this.factor = factor;
		this.extra = extra;
		this.period = period;
	}

	@Override
	public long animate(long animTime) {
		viewSettings.getViewXform(v);
		Vecmath.invAffine(v);

		v[12] = AnimationUtils.animate(v[12], target[0], animTime, factor, extra, period);
		v[13] = AnimationUtils.animate(v[13], target[1], animTime, factor, extra, period);
		v[14] = AnimationUtils.animate(v[14], target[2], animTime, factor, extra, period);

		boolean done = v[12] == target[0] && v[13] == target[1] && v[14] == target[2];

		Vecmath.invAffine(v);

		viewSettings.setViewXform(v);
		drawable.display();

		return done ? 0 : period;
	}
}