package org.jzy3d.plot3d.transform;

import org.jzy3d.maths.Coord3d;
import org.jzy3d.plot3d.rendering.compat.GLES2CompatUtils;

import com.jogamp.opengl.GL;

/**
 * Scale is a {@link Transformer} that stores the scaling factor required to
 * perform the effective OpenGL2 scaling in the ModelView Matrix.
 * 
 * @author Martin Pernollet
 */
public class Scale implements Transformer {

	/**
	 * Initialize a Scale.
	 * 
	 * @param scale
	 *            scaling factor.
	 */
	public Scale(Coord3d scale) {
		this.scale = scale;
	}

	@Override
    public void execute(GL gl) {
		if (gl.isGL2()) {
			gl.getGL2().glScalef(scale.x, scale.y, scale.z);
		} else {
			GLES2CompatUtils.glScalef(scale.x, scale.y, scale.z);
		}
	}

	@Override
    public Coord3d compute(Coord3d input) {
		return input.mul(scale);
	}

	@Override
    public String toString() {
		return "(Scale)" + scale;
	}

	/**************************************************/

	private Coord3d scale;
}