content: /*
   * Copyright (c) 2012 Jason Polites
   * 
   * 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;
  
  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;
  	}
  	
  	
  }
  