Android Open Source - tdpforce Vector F

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (c) 2012 Jason Polites//from   ww  w .  j  av a2 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.polites.android;

import android.graphics.PointF;
import android.util.FloatMath;
import android.view.MotionEvent;

public class VectorF {
  
  public float angle;
  public float length;
  
  public final PointF start = new PointF();
  public final PointF end = new PointF();
  
  public void calculateEndPoint() {
    end.x = FloatMath.cos(angle) * length + start.x;
    end.y = FloatMath.sin(angle) * length + start.y;
  }
  
  public void setStart(PointF p) {
    this.start.x = p.x;
    this.start.y = p.y;
  }
  
  public void setEnd(PointF p) {
    this.end.x = p.x;
    this.end.y = p.y;
  }
  
  public void set(MotionEvent event) {
    this.start.x = event.getX(0);
    this.start.y = event.getY(0);
    this.end.x = event.getX(1);
    this.end.y = event.getY(1);
  }
  
  public float calculateLength() {
    length = MathUtils.distance(start, end);
    return length;
  }
  
  public float calculateAngle() {
    angle = MathUtils.angle(start, end);
    return angle;
  }
  
  
}

Java Source Code List

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