/*
 * @(#)gl_material.java 0.3 01/03/15
 *
 * jGL 3-D graphics library for Java
 * Copyright (c) 1996-2001 Robin Bing-Yu Chen (robin@is.s.u-tokyo.ac.jp)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version. the GNU Lesser
 * General Public License should be included with this distribution
 * in the file LICENSE.
 *
 * This library 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
 * Lesser General Public License for more details.
 */

package jgl.context.attrib.lighting;

import jgl.GL;

/**
 * gl_material is the lighting masterial color class of jGL 2.4.
 *
 * @version 	0.3, 15 Mar 2001
 * @author 	Robin Bing-Yu Chen
 */

public class gl_material {

    /** GL_AMBIENT: Ambient material color */
    public float Ambient [] = {0.2f, 0.2f, 0.2f, 1};

    /** GL_DEFFUSE: Diffuse material color */
    public float Diffuse [] = {0.8f, 0.8f, 0.8f, 1};

    /** GL_SPECULAR: Specular material color */
    public float Specular [] = {0, 0, 0, 1};

    /** GL_EMISSION: Emissive material color */
    public float Emission [] = {0, 0, 0, 1};

    /** GL_SHININESS: Specular exponent of material */
    public float Shininess = 0;

    /** GL_COLOR_INDEXES: Ca, Cd, Cs for color-index lighting, also in gl_enable */
    public float ColorIndexAmbient = 0;
    public float ColorIndexDiffuse = 1;
    public float ColorIndexSpecular = 1;

    public void set_material (int pname, float params []) {
	switch (pname) {
	    case GL.GL_AMBIENT:   Ambient   = params;    break;
	    case GL.GL_DIFFUSE:   Diffuse   = params;    break;
	    case GL.GL_SPECULAR:  Specular  = params;    break;
	    case GL.GL_EMISSION:  Emission  = params;    break;
	    case GL.GL_SHININESS: Shininess = params[0]; break;
	    case GL.GL_AMBIENT_AND_DIFFUSE:
		Ambient = params; Diffuse   = params;    break;
	    case GL.GL_COLOR_INDEXES:
		ColorIndexAmbient  = params[0];
		ColorIndexDiffuse  = params[1];
		ColorIndexSpecular = params[2];
		break;
	    default:
		break;
	}
    }

    public float[] get_material (int pname) {
	float temp[];
	switch (pname) {
	    case GL.GL_AMBIENT:   return Ambient;
	    case GL.GL_DIFFUSE:   return Diffuse;
	    case GL.GL_SPECULAR:  return Specular;
	    case GL.GL_EMISSION:  return Emission;
	    case GL.GL_SHININESS:
		temp = new float [1];
		temp[0] = Shininess;
		return temp;
	    case GL.GL_COLOR_INDEXES:
		temp = new float [3];
		temp[0] = ColorIndexAmbient;
		temp[1] = ColorIndexDiffuse;
		temp[2] = ColorIndexSpecular;
		return temp;
	}
	return null;
    }

    public gl_material (gl_material cc) {
    	System.arraycopy(cc.Ambient,  0, this.Ambient,  0, 4);
    	System.arraycopy(cc.Diffuse,  0, this.Diffuse,  0, 4);
    	System.arraycopy(cc.Specular, 0, this.Specular, 0, 4);
    	System.arraycopy(cc.Emission, 0, this.Emission, 0, 4);
	this.Shininess          = cc.Shininess;
	this.ColorIndexAmbient  = cc.ColorIndexAmbient;
	this.ColorIndexDiffuse  = cc.ColorIndexDiffuse;
	this.ColorIndexSpecular = cc.ColorIndexSpecular;
    }
    
    public gl_material () {};

}