Multiple rotations in OnPaint

Multiple rotations in OnPaint

• PoorSQLGuy

  Ok,

  and which formula would that be

  Trigonometric functions in C# are they degrees/radian

  Arctan is that the inverse of tan

  grtz,
  
  Annihil8

  
  

• Rick Strahl

  u can use trignometric functions (sin, cos and tan, arctan) for find the point (screen pixel) and draw line to that point.

  Regards,
  Sudeesh.

  
  

• WayneSpangler

  pretty sure the trig functions are default in radians. They were for me, anyway.
  

• Nfrf

  public Point RotatePoint(Point pPoint,Point pOrigin,Single degrees)

  {

  Point rotatePoint=new Point();

  rotatePoint.X = Convert.ToInt32(pOrigin.X + (Math.Cos(D2R(degrees))*(pPoint.X - pOrigin.X) - Math.Sin(D2R(degrees))*(pPoint.Y - pOrigin.Y)));

  rotatePoint.Y = Convert.ToInt32(pOrigin.Y + (Math.Sin(D2R(degrees))*(pPoint.X - pOrigin.X) + Math.Cos(D2R(degrees))*(pPoint.Y - pOrigin.Y)));

  return rotatePoint;

  }

  public double D2R(double Angle)

  {

  return Angle / 180 * Math.PI;

  }

  This works for me :) I thought I needed to use matrix.rotateAt.

  
  
• Multiple rotations in OnPaint