SpotLight.java

/*
 *  This file is part of the Haven & Hearth game client.
 *  Copyright (C) 2009 Fredrik Tolf <fredrik@dolda2000.com>, and
 *                     Björn Johannessen <johannessen.bjorn@gmail.com>
 *
 *  Redistribution and/or modification of this file is subject to the
 *  terms of the GNU Lesser General Public License, version 3, as
 *  published by the Free Software Foundation.
 *
 *  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.
 *
 *  Other parts of this source tree adhere to other copying
 *  rights. Please see the file `COPYING' in the root directory of the
 *  source tree for details.
 *
 *  A copy the GNU Lesser General Public License is distributed along
 *  with the source tree of which this file is a part in the file
 *  `doc/LPGL-3'. If it is missing for any reason, please see the Free
 *  Software Foundation's website at <http://www.fsf.org/>, or write
 *  to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 *  Boston, MA 02111-1307 USA
 */

package haven;

import java.awt.Color;
import javax.media.opengl.*;

public class SpotLight extends PosLight {
    public float[] dir;
    public float exp, cut;

    private static final float[] defdir = {0.0f, 0.0f, -1.0f};

    public SpotLight(FColor col, Coord3f pos, Coord3f dir, float exp) {
	super(col, pos);
	this.dir = dir.to3a();
	this.exp = exp;
	this.cut = 90.0f;
    }

    public SpotLight(Color col, Coord3f pos, Coord3f dir, float exp) {
	super(col, pos);
	this.dir = dir.to3a();
	this.exp = exp;
	this.cut = 90.0f;
    }

    public SpotLight(FColor amb, FColor dif, FColor spc, Coord3f pos, Coord3f dir, float exp) {
	super(amb, dif, spc, pos);
	this.dir = dir.norm().to3a();
	this.exp = exp;
	this.cut = 90.0f;
    }

    public SpotLight(Color amb, Color dif, Color spc, Coord3f pos, Coord3f dir, float exp) {
	super(amb, dif, spc, pos);
	this.dir = dir.norm().to3a();
	this.exp = exp;
	this.cut = 90.0f;
    }

    public void enable(GOut g, int idx) {
	super.enable(g, idx);
	GL2 gl = g.gl;
	gl.glLightfv(GL2.GL_LIGHT0 + idx, GL2.GL_SPOT_DIRECTION, dir, 0);
	gl.glLightf(GL2.GL_LIGHT0 + idx, GL2.GL_SPOT_EXPONENT, exp);
	gl.glLightf(GL2.GL_LIGHT0 + idx, GL2.GL_SPOT_CUTOFF, cut);
    }

    public void disable(GOut g, int idx) {
	GL2 gl = g.gl;
	gl.glLightfv(GL2.GL_LIGHT0 + idx, GL2.GL_SPOT_DIRECTION, defdir, 0);
	gl.glLightf(GL2.GL_LIGHT0 + idx, GL2.GL_SPOT_EXPONENT, 0.0f);
	gl.glLightf(GL2.GL_LIGHT0 + idx, GL2.GL_SPOT_CUTOFF, 180.0f);
	super.disable(g, idx);
    }
}