kbkeyframe.java

JAVA3D矩陈的相关类

/*
 * $RCSfile: KBKeyFrame.java,v $
 *
 * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistribution of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or
 * intended for use in the design, construction, operation or
 * maintenance of any nuclear facility.
 *
 * $Revision: 1.4 $
 * $Date: 2007/02/09 17:20:11 $
 * $State: Exp $
 */

package com.sun.j3d.utils.behaviors.interpolators;

import javax.media.j3d.*;
import java.util.*;
import javax.vecmath.*;
import com.sun.j3d.internal.J3dUtilsI18N;

/**
 * This class represents a Key Frame that can be used for Kochanek-Bartels
 * (also called TCB or Tension-Continuity-Bias Splines) spline interpolation.
 *
 * @since Java3D 1.2
 */
public class KBKeyFrame {
  
    // Position, Rotation and Scale
    public Point3f position; 
    public float   heading;
    public float   pitch;
    public float   bank;
    public Point3f scale; 

    // Tension, Continuity & Bias
    public float  tension;
    public float  continuity;
    public float  bias;

    // Sample Time 
    public float  knot;

    // Interpolation type (linear = 0 -> spline interpolation)
    public int linear; 

    // default constructor 
    KBKeyFrame () {
        tension = continuity = bias = 0.0f;
    }

    public KBKeyFrame (KBKeyFrame kf) {
        this(kf.knot, kf.linear, kf.position, kf.heading, kf.pitch, kf.bank, 
                      kf.scale, kf.tension, kf.continuity, kf.bias);
        
    }


    /**
     * Creates a key frame using the given inputs. 
     *
     * @param k knot value for this key frame 
     * @param l the linear flag (0 - Spline Interp, 1, Linear Interp
     * @param pos the position at the key frame
     * @param hd the heading value at the key frame
     * @param pi the pitch value at the key frame
     * @param bk the bank value at the key frame
     * @param s the scales at the key frame
     * @param t tension (-1.0 < t < 1.0)
     * @param c continuity (-1.0 < c < 1.0)
     * @param b bias (-1.0 < b < 1.0)
     */
    public KBKeyFrame (float k, int l, Point3f pos, float hd, float pi, 
                        float bk, Point3f s, float t, float c, float b) {

        knot     = k; 
        linear   = l;
        position = new Point3f(pos);
        heading  = hd;
        pitch    = pi;
        bank     = bk;
        scale    = new Point3f(s);

        // Check for valid tension continuity and bias values
        if (t < -1.0f || t > 1.0f) {
            throw new IllegalArgumentException(J3dUtilsI18N.getString("KBKeyFrame0"));
        }

        if (b < -1.0f || b > 1.0f) {
            throw new IllegalArgumentException(J3dUtilsI18N.getString("KBKeyFrame1"));
        }

        if (c < -1.0f || c > 1.0f) {
            throw new IllegalArgumentException(J3dUtilsI18N.getString("KBKeyFrame2"));
        }

        // copy valid tension, continuity and bias values
        tension = t;
        continuity = c;
        bias = b;
    }

    /**
     * Prints information comtained in this key frame 
     * @param tag string tag for identifying debug message
     */
    public void debugPrint (String tag) {
        System.out.println ("\n" + tag); 
        System.out.println (" knot = " + knot); 
        System.out.println (" linear = " + linear); 
        System.out.println (" position(x,y,z) = " + position.x + " " 
                               + position.y + " " + position.z);
              
        System.out.println (" tension = " + tension); 
        System.out.println (" continuity = " + continuity); 
        System.out.println (" bias = " + bias); 
    }
}