Android Open Source - unknown-pleasures Horizontal Scroll Animator

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The source code is released under:

Creative Commons Attribution NonCommercial NoDerivs (CC-NC-ND) THE WORK (AS DEFINED BELOW) IS PROVIDED UNDER THE TERMS OF THIS CREATIVE COMMONS PUBLIC LICENSE ("CCPL" OR "LICENSE"). THE WORK IS PROTE...

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Java Source Code

/**
 * HorizontalOriginalCoverAnimator.java/*w  ww .  j  a  v a  2s  .c o m*/
 * Author: marek.brodziak@gmail.com
 * Created: Jun 2, 2014
 * Copyright 2014 by miniti
 */

package pl.miniti.android.pleasures.animation;

import android.graphics.Path;

/**
 * Horizontal scroll of the original cover
 */
public class HorizontalScrollAnimator implements Animator {

  /**
   * Randomly initialized y peaks
   */
  protected float[][] peeks = new float[OriginalCover.SIZE][];

  /**
   * Current phase of the animation
   */
  protected int shift = 0;

  /**
   * Number of y peaks in each line
   */
  protected int count;

  /**
   * No-arg default constructor
   */
  public HorizontalScrollAnimator() {
    for (int i = 0; i < OriginalCover.SIZE; ++i) {
      peeks[i] = AnimatorUtil.randomPeeks();
    }
    count = peeks[0].length;
  }

  /*
   * (non-Javadoc)
   * 
   * @see pl.miniti.android.pleasures.animation.Animator#of(int, int)
   */
  @Override
  public Path of(int line, int of) {
    Path p = new Path();
    float[] ps = peeks[line];
    p.moveTo(0f, ps[shift]);
    for (int i = 1; i < count; ++i) {
      int index = shift + i;
      index = index >= count ? index - count : index;

      final float x = i * AnimatorUtil.RESOLUTION;

      float distance = x - .5f;
      distance = distance > 0 ? distance : -distance;

      final float raiser = (distance > .25f)
          ? 1f
          : (35f - (distance * 150f));

      p.lineTo(x, -Math.abs(ps[index]) * (raiser > 1f ? raiser : 1f));
    }
    return p;
  }

  /*
   * (non-Javadoc)
   * 
   * @see pl.miniti.android.pleasures.animation.Animator#frame()
   */
  @Override
  public void frame() {
    ++shift;
    if (shift == count) {
      shift = 0;
    }
  }

}

Java Source Code List