I want to find out if a given point, in PHYS_COORDS, is inside any of these RTRoundedRectangle2D objects by iterating through them like so:
for each rt in myRectangles if rt...Contains(x,y) then 'show the rectangle else 'hide the rectangle end if next
myRectangles is a global List Of(RTRoundedRectangle2D) I can show and hide the rectangles by adding the containing rectangle to the ChartView object, and by removing the previous object.
I cannot figure out how to do the hit test for a given point. This is a point known to me (not a mouse click point) and I am not sure if I should use the NearestDataPoint methods.
If you restrict the test point and rectangle to physical coordinates it seems pretty simple to us. Perhaps we are missing something. This does not take into account the rounded corners, but none of our routines will.
public bool HitTest (Point2D pt, RTRoundedRectangle2D rect)
{
bool result = false;
if ((pt.X > rect.X) &&
(pt.Y > rect.Y) &&
(pt.X < (rect.X + rect.Width)) &&
(pt.Y < (rect.Y + rect.Height)))
{
result = true;
}
return result;
}
Thanks. I guess I was looking for a one-line function...because I noticed the CheckIntersection function and also the Contains method of the Rectangle2D class. I thought I should be able to use them.
How to detect if a given point is inside an object
Posted - 07 Aug 2008 : 18:19:26
