[GEM-dev] [ pd-gem-Feature Requests-2612731 ] glsl_geometry

[IOhannes m zmoelnig]

cyrille henry wrote:
> 

> i try anything i can think of, but i did never change the drawing 
> behaviour : it work with cube in draw quad or draw triangles mode, but 
> no line.

funny, because that is the order of working examples i had:
- first i ported the vertex-drawing code from the 
http://cirl.missouri.edu/gpu/glsl_lessons/glsl_geometry_shader/ to gemGL
  glBegin(GL_LINES);glVertex2i(gw/2,0);glVertex2i(gw/2,gh);glEnd();
- because the line was so boring, i then used [triangle] in "line" mode
- only finally i used "fill"

so it actually was opposite to what you experience.
mabye i introduced some problems when i defaulted to "triangles" (mainly 
because that's the major default mode in Gem)

> 
> did you find a good resource to explain all of this?

no, but i didn't even search. probably matthias's mail points to some 
good ressources.

>>
>> so
>> [read shader.geom(
>> followed by a
>> [geometry_type GL_LINE_STRIP GL_LINES, read shader.geom(
>> should work fine
> 
> do [read shader.geom( mean [open shader.geom(?
> [geometry_type GL_LINE_STRIP GL_LINES( should be send to glsl program, 
> while [open shader.geom( to glsl_geometry.
> 
> or did i misunderstand something?

ouch, ouch, Ctrl-Z
of course my stupid little message boxes should be followed by something 
like...

|
[route read       ]
|                 |
[symbol]          |
[open $1(         |
|                 |
[glsl_geometry]   |
                   |
+-----------------+
|
[glsl_program]


sorry for the confusion...

mgfadr
IOhannes
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