/Users/rruff82/NetBeansProjects/CGP/src/org/classroomgaming/cgp/SpriteAnimation.java

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//
//  SpriteAnimation.java
//  CGP-2D-Engine
//
//  Created by Ryan Ruff on 3/11/09.
//  Copyright 2009 ClassroomGamingProject.org. All rights reserved.
//
//    This program is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    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.
//
//    You should have received a copy of the GNU General Public License
//    along with this program.  If not, see <http://www.gnu.org/licenses/>.
package org.classroomgaming.cgp;

import org.classroomgaming.cgp.SpriteAnimationFrame;

public class SpriteAnimation {

    public enum Style {

        FORWARD_STICKY, FORWARD_LOOP, PING_PONG, BACKWARD_LOOP, BACKWARD_STICKY
    }
    private String name;
    private SpriteAnimationFrame frames[];
    float frameTime;
    int frame;
    boolean done;
    boolean forwards;

    public SpriteAnimation(String n, SpriteAnimationFrame f[]) {
        name = n;
        frames = f;
        frameTime = 0;
        frame = 0;
    }

    public String getName() {
        return name;
    }

    public int getNumFrames() {
        return frames.length;
    }

    public int getImageID() {
        return frames[frame].imageID;
    }

    public void set(int f, float t) {
        frame = f;
        frameTime = t;
        done = false;
        forwards = true;
    }

    public boolean update(float t, Style style) {
        frameTime += t;
        if (frameTime > frames[frame].duration) {
            frameTime -= frames[frame].duration;
            switch (style) {

                case FORWARD_STICKY:
                    ++frame;
                    if (frame >= frames.length) {
                        frame = frames.length - 1;
                        done = true;
                    }
                    break;
                case BACKWARD_LOOP:
                    --frame;
                    if (frame < 0) {
                        frame = frames.length - 1;
                    }
                    break;
                case BACKWARD_STICKY:
                    --frame;
                    if (frame < 0) {
                        frame = 0;
                        done = true;
                    }
                    break;
                case PING_PONG:
                    if (forwards) {
                        ++frame;
                        if (frame >= frames.length) {
                            frame = frames.length - 1;
                            forwards = false;
                        }
                    } else {
                        --frame;
                        if (frame < 0) {
                            frame = 0;
                            forwards = true;
                        }
                    }
                    break;
                case FORWARD_LOOP:

                    ++frame;
                    if (frame >= frames.length) {
                        frame = 0;
                    }
                    break;
                default:
            }
        }
        return done;
    }
}

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