Re: [newsletters] Re: [PyOpenGL-Users] OpenGl + Mouse Selection

[sebastien H. <2l...@2l...>]

I use this method with good success.

I just have a little problem. My program paint some line on the OpenGL 
panel and when i try to select one, I need to be very close to select 
it. Is it a way to make the select area more large ?

Thanks in advance.

SEB

Jasper Phillips a écrit:

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>That sounds like what I want.  Thanks for the search reference!
>- -Jasper
>
>On Mon, 21 Apr 2003, Mike C. Fletcher wrote:
>  
>
>>There are a number of ways to do this, but the most common way I've 
>>encountered is to use the glSelectBuffer-based selection mechanisms 
>>which come with OpenGL.  You can find sample code for the glSelectBuffer 
>>stuff in OpenGLContext or just about any OpenGL reference or programming 
>>Web site (such as NeHe).
>>
>>The basic approach is to re-render the scene in "select" mode, pushing 
>>"names" (integers) onto the selection stack as you render to a frustum 
>>which is the projection of your picking point to infinity.  When you 
>>exit the select rendering mode you receive a list of records indicating 
>>which names were active when items were rendered to the frustum.
>>
>>Hope this helps,
>>Mike
>>    
>>
>
>[snip my original question]
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