Android Open Source - Coloring-book Acceleration Initializer

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Back to project page Coloring-book.


The source code is released under:

Apache License

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Java Source Code

package com.plattysoft.leonids.initializers;
/*from w ww  .j ava2 s .c  om*/
import java.util.Random;

import com.plattysoft.leonids.Particle;

public class AccelerationInitializer implements ParticleInitializer {

  private float mMinValue;
  private float mMaxValue;
  private int mMinAngle;
  private int mMaxAngle;

  public AccelerationInitializer(float minAcceleration, float maxAcceleration, int minAngle, int maxAngle) {
    mMinValue = minAcceleration;
    mMaxValue = maxAcceleration;
    mMinAngle = minAngle;
    mMaxAngle = maxAngle;

  public void initParticle(Particle p, Random r) {
    float angle = r.nextInt(mMaxAngle - mMinAngle) + mMinAngle;
    float angleInRads = (float) (angle*Math.PI/180f);
    float value = r.nextFloat()*(mMaxValue-mMinValue)+mMinValue;
    p.mAccelerationX = (float) (value * Math.cos(angleInRads));
    p.mAccelerationY = (float) (value * Math.sin(angleInRads));


Java Source Code List