topic Problem with graphical hotspots in GDL

Problem with graphical hotspots

Finlay_Moran — Thu, 26 Sep 2024 11:20:27 GMT

Hi, everyone!

I'm trying to educate myself with GDL.

For the moment I'm trying to figure out how to use graphical hotspot. Generally I understand the idea but I have some issues.

I've made two circles, where the first one is static and the second one is movable.

Issue is that I want the moving point to be exactly at the right side (or right pole) of the second circle. However when I try to move it the cursor goes from right side to the center of the circle.

Tried to improve my code with chatGPT but it failed miserably.

The problem as I understand it is with coordinates of the moving point and the second circle itself.

Here is a code I made. There are few variables that defined:

radCircle - circle radius movX - parameter for hotspots to works with ! First circle CIRCLE2 0, 0, radCircle hsID = hsID+1 HOTSPOT2 0, 0, hsID ! Center point of the first circle hsID = hsID+1 HOTSPOT2 radCircle, 0, hsID ! Hotspot for the right side of the first circle ! Second circle CIRCLE2 movX, 0, radCircle hsID = hsID+1 HOTSPOT2 0, 0, hsID, movX, 1 ! Base point hsID = hsID+1 HOTSPOT2 movRad, 0, hsID, movX, 2 ! Moving point hsID = hsID+1 HOTSPOT2 -radCircle, 0, hsID, movX, 3 ! Reference point

Re: Problem with graphical hotspots

Lingwisyer — Wed, 21 Feb 2024 02:23:14 GMT

You have Circle 1 or radius radCircle, and Circle 2 of radius radCircle which can move along a linear path that runs through Circle 1?

hsID = 0 CIRCLE2 0, 0, radCircle CIRCLE2 movX, 0, radCircle HOTSPOT2 radCircle, 0, hsID, movX, 1 : hsID = hsID+1 !Base HOTSPOT2 movX + radCircle, 0, hsID, movX, 2 : hsID = hsID+1 !Moving HOTSPOT2 -radCircle, 0, hsID, movX, 3 : hsID = hsID+1 !Ref

Ling.

Re: Problem with graphical hotspots

Finlay_Moran — Wed, 21 Feb 2024 04:26:08 GMT

Wow! Thank you so much. I didn't expect it to be so easily done.

Just to be clear, the problem was that base point was at the center of coordinates. But why moving the base point made everything as intended?

Re: Problem with graphical hotspots

Lingwisyer — Wed, 21 Feb 2024 04:43:16 GMT

You had movRad so while you edited movX the node you were actually moving never changed.