package org.jzy3d.plot3d.transform;

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

import com.jogamp.opengl.GL;

/**
 * Translate is a {@link Transformer} that stores the offset required to perform
 * the effective OpenGL2 translation in the ModelView Matrix.
 * 
 * @author Martin Pernollet
 */
public class Translate implements Transformer {
	protected Translate() {

	}

	/**
	 * Initialize a Translate.
	 * 
	 * @param shift
	 *            translation offset.
	 */
	public Translate(Coord3d shift) {
		this.shift = shift;
	}

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

	@Override
    public Coord3d compute(Coord3d input) {
		return input.add(shift);
	}

	@Override
    public String toString() {
		return "(Translate)" + shift;
	}

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

	private Coord3d shift;
}