Android Open Source - Schooner-3D Boned Object

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2012 Dan Mercer/*from   www  .ja  va2  s  . 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.objects;

import android.util.Log;

import com.supermercerbros.gameengine.armature.Action;
import com.supermercerbros.gameengine.armature.ActionData;
import com.supermercerbros.gameengine.armature.BinarySkeletalVertexModifier;
import com.supermercerbros.gameengine.armature.SkeletalVertexModifier;
import com.supermercerbros.gameengine.armature.Skeleton;
import com.supermercerbros.gameengine.engine.shaders.Material;
import com.supermercerbros.gameengine.parsers.PreObjectData;

public class BonedObject extends GameObject {
  public static final int BONES_PER_VERTEX = 4;
  
  public final float[] boneWeights;
  public final byte[] boneIndices;
  private final Skeleton skeleton;
  
  private Action currentAction;
  private final ActionData actionData;
  private final int boneCount;
  
  public BonedObject(PreObjectData data, Material material, Skeleton skeleton) {
    super(data, material);
    this.skeleton = skeleton;
    
    final int vertCount = info.count;
    boneCount = skeleton.boneCount();
    actionData = new ActionData(boneCount);
    
    // Localize arrays
    final byte[][] localIndices = data.boneIndices;
    final float[][] localWeights = data.boneWeights;
    
    // Get largest number of bone weights per vertex
    int vertexWeightCount = 0;
    for (int i = 0; i < vertCount; i++) {
      int weightCount = localWeights[i].length;
      if (weightCount > vertexWeightCount) {
        vertexWeightCount = weightCount;
      }
    }
    
    Log.d(TAG, "vertexWeightCount = " + vertexWeightCount);
    if (vertexWeightCount == 1) { // Single, binary weights
      
      // Init boneIndices and boneWeights
      this.boneIndices = new byte[vertCount];
      this.boneWeights = null;
      
      // Fill boneIndices (boneWeights is unused)
      for (int i = 0; i < vertCount; i++) {
        this.boneIndices[i] = localIndices[i][0];
      }
      
      // Init VertexModifier and ActionData
            material.setVertexModifier(new BinarySkeletalVertexModifier(boneCount));
      
    } else { // Multiple weights.
      if (vertexWeightCount > BONES_PER_VERTEX) {
        Log.e(TAG, "At least one vertex has more than " + BONES_PER_VERTEX
            + " bones parented to it. Only " + BONES_PER_VERTEX
            + " are supported.");
        vertexWeightCount = BONES_PER_VERTEX;
      }
      
      // Init boneIndices and boneWeights
      this.boneIndices = new byte[BONES_PER_VERTEX * vertCount];
      this.boneWeights = new float[BONES_PER_VERTEX * vertCount];
      
      // Fill boneIndices and boneWeights
      for (int vert = 0; vert < vertCount; vert++) {
        final byte[] vertIndices = localIndices[vert];
        final float[] vertWeights = localWeights[vert];
        final int boneCount = vertIndices.length;
        final int vertOffset = vert * 4;
        
        for (int j = 0; j < vertexWeightCount && j < boneCount; j++) {
          int offset = vertOffset + j;
          boneIndices[offset] = vertIndices[j];
          boneWeights[offset] = vertWeights[j];
        }
      }
      
      // Init VertexModifier and ActionData
      material.setVertexModifier(new SkeletalVertexModifier(BONES_PER_VERTEX,
          boneCount));
    }
  }
  
  /**
   * Sets the Action of this BonedObject to the given Action
   * 
   * @param action
   *            The Action to start.
   * @param duration
   *            The duration of the Action, in milliseconds.
   */
  public void setAction(Action action, long duration) {
    if (action != null) {
      final long time = System.currentTimeMillis();
      currentAction = action;
      actionData.writeState(time, time, duration, skeleton);
      // TODO: time, time? (add delay support to this method and to
      // movements)
      super.startMovement(action.movement, time, duration);
    } else {
      throw new IllegalArgumentException("action == null");
    }
  }
  
  @Override
  public void drawVerts(long time) {
    if (currentAction != null) {
      currentAction.update(actionData, skeleton, time);
    }
  }
  
  @Override
  public int getExtraMatrixCount() {
    return boneCount;
  }
  
  @Override
  public void writeMatrices(float[] matrixArray) {
    super.writeMatrices(matrixArray);
    skeleton.writeMatrices(matrixArray, 16);
  }
}

Java Source Code List

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