Android Open Source - Schooner-3D Curve Movement

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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 a2 s. c  om
 * 
 * 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.motion;

import com.supermercerbros.gameengine.math.Curve;
import com.supermercerbros.gameengine.math.MatrixUtils;
import com.supermercerbros.gameengine.objects.GameObject;

public class CurveMovement implements Movement {
  private final Curve xPos, yPos, zPos, wRot, xRot, yRot, zRot,
      xScl, yScl, zScl;

  /**
   * @param flags
   * @param curves
   * 
   * @throws ArrayIndexOutOfBoundsException if not enough Curves are supplied for the given flags
   */
  public CurveMovement(int flags, Curve... curves) {
    short index = 0;
    
    if ((flags & POSITION) != 0 && curves[index] != null) {
      xPos = curves[index++];
      yPos = curves[index++];
      zPos = curves[index++];
    } else {
      xPos = null;
      yPos = null;
      zPos = null;
    }
    
    if ((flags & ROTATION) != 0 && curves[index] != null) {
      wRot = curves[index++];
      xRot = curves[index++];
      yRot = curves[index++];
      zRot = curves[index++];
    } else {
      wRot = null;
      xRot = null;
      yRot = null;
      zRot = null;
    }
    
    if ((flags & SCALE) != 0 && curves[index] != null) {
      xScl = curves[index++];
      yScl = null;
      zScl = null;
    } else if ((flags & SCALE_AXIS) != 0 && curves[index] != null) {
      xScl = curves[index++];
      yScl = curves[index++];
      zScl = curves[index++];
    } else {
      xScl = null;
      yScl = null;
      zScl = null;
    }
  }

  @Override
  public void getFrame(GameObject target, MovementData data, long time) {
    final float framePoint = ((float) (time - data.startTime))
        / (float) data.duration;
    if (framePoint >= 1) {
      target.endMovement();
    }
    
    // Translate
    if (xPos != null) {
      final float posX = xPos.getInterpolation(framePoint);
      final float posY = yPos.getInterpolation(framePoint);
      final float posZ = zPos.getInterpolation(framePoint);
      MatrixUtils.translateM(target.modelMatrix, 0, data.matrix, 0, posX, posY, posZ);
    }
    
    // Rotate
    if (wRot != null) {
      final float rotW = wRot.getInterpolation(framePoint);
      final float rotX = xRot.getInterpolation(framePoint);
      final float rotY = yRot.getInterpolation(framePoint);
      final float rotZ = zRot.getInterpolation(framePoint);
      MatrixUtils.rotateQuaternionM(target.modelMatrix, 0, rotW, rotX, rotY, rotZ);
    }
    
    // Scale
    if (xScl != null) {
      if (yScl != null) {
        // Nonuniform Scale
        final float sclX = xScl.getInterpolation(framePoint);
        final float sclY = yScl.getInterpolation(framePoint);
        final float sclZ = zScl.getInterpolation(framePoint);
        MatrixUtils.scaleM(target.modelMatrix, 0, sclX, sclY, sclZ);
      } else {
        // Uniform Scale
        final float scl = xScl.getInterpolation(framePoint);
        MatrixUtils.scaleM(target.modelMatrix, 0, scl, scl, scl);
      }
    }
  }
}

Java Source Code List

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