Thread: [PyOpenGL-Users] Draw Rounded Rectangle and Circle

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Hi,

How can I draw 'Rounded Rectangle' and a circle. I don't want want to use textures as size varies at run time. This is for an orthographic application.

Thanks

Prashant Saxena wrote:
> Hi,
>
> How can I draw 'Rounded Rectangle' and a circle. I don't want want to 
> use textures as size varies at run time. This is for an orthographic 
> application.
You would normally tessellate the corners or the circle according to the 
screen-size of the shape (that is, more points if the shape is larger).  
sin/cos from numpy will work fine on numpy aranges to produce the 
circular sections at whatever resolution you need.  If you want to get 
really fancy, you could use evaluators or even NURBS, but that's 
probably way too complex and not worth the work unless you really have 
higher-order curves to render as well.

HTH,
Mike

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com

Prashant Saxena wrote:
> Hi,
> 
> How can I draw 'Rounded Rectangle' and a circle. I don't want want to use
> textures as size varies at run time. This is for an orthographic application.

It depends on how many you have. For performance nothing beats textures.

I would still use them. They scale well and automatically if you create the 
mipmaps yourself, and I'd use them only for the corners of the rectangle to take 
care of aspect ratio changes.

Just my $.02	

	Dirk

Thread: [PyOpenGL-Users] Draw Rounded Rectangle and Circle

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