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how to use non integer coordinates (like OpenGL) with Draw? [message #11976]

Fri, 05 October 2007 22:00

ajmf77
Messages: 6
Registered: December 2006
Location: Santiago de Chile

Promising Member

Hi:
I am wondering with Draw funcionality, but for now, can't know well many of them:
First, for now, how can i use non integer coordinates, like OpenGL, with Draw, and manipulate mouse coordinates for the feedback?
Thanks in advance!

Alejandro Mu�oz Fonttz
Project Engineer

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Re: how to use non integer coordinates (like OpenGL) with Draw? [message #11983 is a reply to message #11976]

Sat, 06 October 2007 17:53

mirek
Messages: 14257
Registered: November 2005

Ultimate Member

ajmf77 wrote on Fri, 05 October 2007 16:00

Coordinates for Draw are either in screen pixels or "dots" for physical devices like printer. "int" is enough here. Draw is intentionally kept "primitive".

If you are in request of converting other types of coordinates, you need to do that on your own.

Mirek

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Re: how to use non integer coordinates (like OpenGL) with Draw? [message #11988 is a reply to message #11983]

Sat, 06 October 2007 18:34

ajmf77
Messages: 6
Registered: December 2006
Location: Santiago de Chile

Promising Member

Hi:
thanks for your answer. Indeed, I think about this like you answer, and i am very tempted to use the GEOM package. It is usable, anyway? At the time, enough of can i read about this looks impressive, but it is VAST, too.
Any suggestion?
PD: Actually, I want to make an 2D CAD (very simple, also) for modeling plane bar structures (indeed, i am a Structural Engineer), and i need this for complete my own Analisys software.
Thanks!

Alejandro Mu�oz Fonttz

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Re: how to use non integer coordinates (like OpenGL) with Draw? [message #11993 is a reply to message #11988]

Sat, 06 October 2007 23:45

mirek
Messages: 14257
Registered: November 2005

Ultimate Member

ajmf77 wrote on Sat, 06 October 2007 12:34

It is definitely usable and maintained, but expect less support... Smile

Search the forum for details.

Mirek

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Re: how to use non integer coordinates (like OpenGL) with Draw? [message #19351 is a reply to message #11993]

Fri, 28 November 2008 13:07

rylek
Messages: 79
Registered: November 2005

Member

Hi there!

I believe that if you intend to go the 2D CAD way, the Geom module might be of some use to you. The Geom/Draw Plotter object handles affine coordinate transform, the Tool objects (PathTool, AreaTool, MarkTool) can be used to draw some primitive objects using logical (float) coordinates. The PlotterCtrl control in Geom/Ctrl is a generic view control intended exactly for viewing and editation float-based drawing-style data. There is a DragDrop subobject which can be used to implement various mouse operation modes. There are also some murkier areas, like a toolbox for handling geographic coordinate transforms, but perhaps it'll be better to leave that for later. There are also some generic mathematical and computational geometry-related routines like linear equation set solver, complex polygon splitter or Delaunay triangulator. Parts of the stuff don't really belong there and some slowly find their way into Mirek-maintained main trunk Wink

.

Regards

Tomas

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