Android Open Source - HzGrapher Euclid Line

• Back to Graphics/graph  ↑

From Project

Back to project page HzGrapher.

License

The source code is released under:

Apache License

Java Source Code

package com.handstudio.android.hzgrapherlib.util;
//w w w  .ja v  a2s . c  o  m
public class EuclidLine 
{
  private EuclidPoint mPt1 = null;
  private EuclidPoint mPt2 = null;
  
  public EuclidLine ( EuclidPoint pt1 , EuclidPoint pt2 )
  {
    mPt1 = pt1; mPt2 = pt2;
  }
  
  public float getLength ()
  {
    return (float)Math.sqrt((mPt2.getX()-mPt1.getX())*(mPt2.getX()-mPt1.getX()) + 
        (mPt2.getY()-mPt1.getY())*(mPt2.getY()-mPt1.getY()));
  }
  
  public float getEclination () 
  {
    return 0.0f;
  }
  
  public EuclidPoint getPointOfLine ( boolean startFromPt1 , float distance )
  {
    EuclidPoint ptRet = null;
    double dx = mPt2.getX() - mPt1.getX();
    double dy = mPt2.getY() - mPt1.getY();
    
    double theta = 0;
    if ( startFromPt1 == true ) { theta = Math.atan(dy/dx) + Converter.DegreeToRadian(180.0f); }
    else { theta = Math.atan ( dy / dx ); }
    
    double x = (double)mPt1.getX() + ((double)distance * Math.cos( theta ));
    double y = (double)mPt1.getY() + ((double)distance * Math.sin( theta ));
    
    ptRet = new EuclidPoint ( (float)x , (float)y );
        
    return ptRet;
  }
}

Java Source Code List

• Back to Graphics/graph  ↑