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silicondale · Posted: Tue May 07, 2024 6:40 pm Post subject: OpenGL and mouse position

How do I get mouse position x,y in a %og window? CLEARWIN_STRING@ gives MOUSE_LEFT_CLICK and MOUSE_RIGHT_CLICK callback reasons but CLEARWIN_INFO@(GRAPHICS_MOUSE_X) and Y return only zeros. Are there different parameters to be used for OpenGL, or is this something that is just not implemented ?
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(Steve Henley)

silicondale · Posted: Tue May 07, 2024 8:44 pm Post subject:

Answering my own question. Found a post from 2008 - John Horspool gave the answer - many thanks, John. I'll try it.
https://forums.silverfrost.com/viewtopic.php?p=4594&sid=d19d1f698516bc5ef2bf888e8685886b
Seems it's very simple if it still works

LitusSaxonicum · Posted: Fri May 10, 2024 4:14 pm Post subject:

Ah. John Horspool. RIP.

silicondale · Posted: Fri May 10, 2024 4:46 pm Post subject:

Thanks for letting me know. That's sad. But the call still works.

However, I'm shelving the %og work despite the better quality graphics, and reverting to %gr - problem is the lack of Ftn95 documentation for OpenGL. I've made the example programs work OK, and have even managed to display a digital photo image using OpenGL (each pixel is a little coloured square), but without documentation it's an uphill struggle to do much more with it.
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(Steve Henley)

LitusSaxonicum · Posted: Fri May 10, 2024 9:06 pm Post subject: with exq

Steve,

John Horspool was a regular and fantastically helpful contributor to this forum until shortly before he passed away from cancer. He made his living from a finite element stress analysis system with exquisite OpenGL graphics - graduated colours on 3D objects that could be rotated in real time etc. I wish that I'd met him in person.

Even though I don't need anything better than %gr graphics (including mouse interaction and hard copy), I have always envied the results obtainable with OpenGL. I really do wish some generous soul would write a comprehensible and simple guide - ideally, providing it free (Just as I wrote that 200 page intro to Clearwin+ for old-style Fortran programmers that is on this site if I'm allowed to brag).

Eddie

silicondale · Posted: Sat May 11, 2024 8:23 am Post subject:

Wow! You are indeed allowed to brag, Eddie. That is an amazing body of work. To think that all these years I have been struggling with the old Salford manuals plus the ftn95.enh and cwplus.enh updates.
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(Steve Henley)