Android Open Source - Schooner-3D Mesh Animation

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2012 Dan Mercer//  w w  w .j av a2s .c  o m
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.supermercerbros.gameengine.animation;

import java.util.List;

import com.supermercerbros.gameengine.objects.AnimatedMeshObject;
import com.supermercerbros.gameengine.util.IPO;
import android.util.Log;

/**
 * Contains the data of one animation of an {@link AnimatedMeshObject}.
 */
public class MeshAnimation {
  private static final String TAG = "com.supermercerbros.gameengine.objects.MeshAnimation";
  
  /**
   * Contains the unique identifier for this Animation
   */
  public final String id; 
  private final List<Keyframe> keyframes;
  private final int numOfKeyframes;
  private float[] times;

  /**
   * @param keyframes
   * @param ratios
   */
  public MeshAnimation(List<Keyframe> keyframes, float[] ratios, String id) {
    this.id = id;
    times = new float[ratios.length];
    float last = ratios[ratios.length - 1];
    if (last > 1.0) {
      for (int i = 0; i < ratios.length; i++) {
        times[i] = ratios[i] / last;
      }
    } else {
      this.times = ratios;
    }

    this.numOfKeyframes = keyframes.size();
    this.keyframes = keyframes;
  }

  public void getFrame(long frameTime, AnimationData data,
      AnimatedMeshObject object) { // frameTime is world time
    Log.d(TAG, "MeshAnimation.getFrame() was called.");

    double framePoint = ((float) (frameTime - data.startTime)) / (float) data.duration;
    Log.d(TAG, framePoint + " = (" + (frameTime - data.startTime) + ") / " + data.duration);

    if (framePoint < 0.0) {
      framePoint = (frameTime - data.callTime)
          / (data.startTime - data.callTime);
      IPO.mesh(object.verts, data.initialState, keyframes.get(0).verts,
          framePoint);

    } else if (framePoint >= data.loop && data.loop > 0) {
      keyframes.get(numOfKeyframes - 1).loadTo(object.verts);
      object.clearAnimation();

    } else {
      framePoint %= 1.0;
      int nextKey, lastKey = times.length - 1;
      
      while (framePoint < times[lastKey]) {
        lastKey--;
      }
      
      if (lastKey < times.length - 1) {
        nextKey = lastKey + 1;
        framePoint = (framePoint - times[lastKey])
            / (times[nextKey] - times[lastKey]);
      } else {
        nextKey = 0;
        framePoint = (framePoint - times[lastKey])
            / (1 + times[0] - times[lastKey]);
      }

      IPO.mesh(object.verts, keyframes.get(lastKey).verts, keyframes
          .get(nextKey).verts, framePoint);
    }

  }

  public int getCount() {
    return keyframes.get(0).count();
  }
}

Java Source Code List

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