Geometry shaders

OpenGL Development JOGL Development
#1

Hello there.

Is there any news about jogl supporting geometry shaders ?

ive search the docs but there are no GS profiles available. atleast i didnt see anything…

anyone ?

#2

JOGL supports geometry shaders fine.


...
int id = gl.glCreateShader(GL.GL_GEOMETRY_SHADER_EXT);
...
gl.glProgramParameteriEXT(GL.GL_GEOMETRY_INPUT_TYPE_EXT, GL.GL_POINTS);
gl.glProgramParameteriEXT(GL.GL_GEOMETRY_OUTPUT_TYPE_EXT, GL.GL_LINE_STRIP);
gl.glProgramParameteriEXT(GL.GL_GEOMETRY_VERTICES_OUT_EXT, 22);
...
#3

// GEOMETRY PROFILES
CgGL.cgGLGetLatestProfile( CgGL.CG_GL_GEOMETRY );

i’ve downloaded 1.1.2 and there is no profile for GS.

im using CgFX and when i try to run an effect, it gives me an error on compile…

what profile is there for GS available… arbgp1 ??

#4

Hello again,

even if CgFX doesnt work out with GS (which by nvidia’s website it does, since i saw a report there that said they fixed problems of multipl GS with CgFX) how will i load a geometry program using cgCreateProgramFromFile( … ) if i cant see any geometry program profile to compile it with ?

anyone ?

#5

even if I can’t answer your question, GLSL geom shaders work perfectly, i’ve never used cg before…

#6

well, ok. but for you to use GLSL, you have to use glCreateShader() and u have to load the shader using a profile correct ?

what is the profile you use? where do u get it from in JOGL ?

i dont see any profiles in java other that ARBVP1, ARBFP1.

am i wrong ?

#7

GLSL has no profiles. Fragment and vertex shaders are a core feature of GL 2.1, geometry shaders are available as extention. Each shader is written in GLSL against a specific language version, you may define on top of the file (latest and greatest is 1.3). You can ask gl e.g for GLSL 1.2 support etc…

i am pretty sure i only saw the term “profile” in context of CG or GL3.x profiles but not for GLSL.

#8

hi bienator,

yes, you are correct. after some research i go to that conclusion. i have been escaping from glsl, since i find it a bit too much high level. but if thats what it takes to work geometry shader in java for now i think i must give it a try.

but ill be waiting for jogl to support gl3 and cgfx more deeply.

thanks for ur time