njazz

is it possible to use geometry shader in jit.gl.slab? my first attempt resulted in 'jit.gl.slab: jit.gl.texture: error disabling texture unit: GL Error: Invalid operation' so i'm curious if i'm doing something wrong (as i'm a beginner in things like that) or it is not supposed to work that way.

Any ideas or examples will be appreciated.

is it possible to use geometry shader in jit.gl.slab? my first attempt resulted in 'jit.gl.slab: jit.gl.texture: error disabling texture unit: GL Error: Invalid operation' so i'm curious if i'm doing something wrong (as i'm a beginner in things like that) or it is not supposed to work that way.
Any ideas or examples will be appreciated.

geometry-shader-in-jit-gl-slab

there's a few geometry shaders and examples that come with the disto.

in your file browser, search for "gm." to reveal these files.

there's a few geometry shaders and examples that come with the disto.
in your file browser, search for "gm." to reveal these files.


thanks for your reply! Yes, i've tried that already, nice examples and made my own simple one to duplicate geometry (copied from some examples).

The problem for me is when i run geometry shader in jit.gl.slab, not in a jit.gl.shader: i don't understand what "draw mode" is used in gl.slab and what type of geometry should be correct input to the geometry shader in that case. Tried "points", "triangles_strip" and "triangles_grid" with no result.

Or i am probably misunderstanding the rendering in Jitter as i'm quite new to that.

I'm actually trying to do weird thing with generating geometry in jit.gl.pix and then sending it as a texture to a custom shader - that's the reason i'd like to try to pass the texture through shader in jit.gl.slab to keep it in this 'visual programming' domain. I know, it's quite weird.

The problem for me is when i run geometry shader in jit.gl.slab, not in a jit.gl.shader: i don't understand what "draw mode" is used in gl.slab and what type of geometry should be correct input to the geometry shader in that case. Tried "points", "triangles_strip" and "triangles_grid" with no result. 

I'm really trying weird thing there but anyway don't have any ideas what exactly is wrong in my shader code in jit.gl.slab

is there a reason you're trying process geometry on a slab? slabs are more for texture processing. gl.shader in combination with gl.mesh are the ideal objects for processing geometry.

Yes, i started with gl.mesh + shader that displaced vertices in vertex program but i wanted more flexibility with the ease of use so i tried it that way. So it was gl.mesh + jit.pix then gl.mesh + gl.shader and now it's jit.gl.pix + gl.mesh with this shader that replaces the geometry. For final setup i'm expecting to optimize it and write shaders but for experiments i find this quite convenient to experiment with geometry inside jit.gl.pix.