Here is the source I am using. Viewplane is a class that contains the Location, Direction, Up and Right vectors of the display area. I am trying to determine if a given point is seen on the display area. The assumption is that Direction points to the middle of the display area. Right is the right side and Up is the top. I know that the FOV stuff should probably be doubled (*2) to account for the lower and left sides of the screen area. Would someone please tell me what I am doing wrong here? I have been struggling with this problem since Mid-April and would like to just give up on it, only, I can't. It is needed for certain aspects of what I am doing.

        
bool WF_VIEWPLANE::IsPointSeen( WF_VECTOR& vector )
{
  WF_VECTOR v( vector - Direction );
  WF_VECTOR vu( ((Up * v) * Up) + Direction );
  WF_VECTOR vr( ((Right * v) * Right) + Direction );

  //*********************************************************************

  // Previously defined elsewhere: HFOV = Direction.Angle(Up);
  if (Direction.Angle(vu) < HFOV)
  {
    //*********************************************************************

    // Previously defined elsewhere: HFOV = Direction.Angle(Right);
    if (Direction.Angle(vr) < VFOV) return true;
  }
  return false;
}

        

Thanks for your help. Regards, Jumpster Semper Fi Edited by - Jumpster on 10/20/00 1:16:02 PM

I was going to ask the same question! Could somebody help us out on this?

I feel like i should have a great idea right now but i dont!

I know that: 1) location refers to where I am (camera). 2) Direction is where I am looking at. 3. The up vector is the top of my screen(center). The right vector is the right center of my screen.

How do I determine if point A is visible with the parameters given?



Regards,
Jumpster


Semper Fi