Gl Point Sprites

[kurtkz]

Hi all,

has anyone managed to get point sprites working using the official GPH SDK? Code::Blocks keeps saying GL_POINT_SPRITE was not declared in the scope, but it is meant to be available in GL ES 1.1 Lite. Any help will be greatly appreciated.

Cheers
Kurt

 

[crow_riot]

i've never used them, but what you could try is defining it by yourself (gl_point_sprite_oes from http://www.khronos.org/registry/gles/api/1.1/gl.h) and just use it. i tried something different by myself, days back with the OES_draw_texture extension and it worked (besides getting the procaddress of glDrawTexOES from from libopengles_lite.so)

 

[kurtkz]

i've never used them, but what you could try is defining it by yourself (gl_point_sprite_oes from http://www.khronos.org/registry/gles/api/1.1/gl.h) and just use it. i tried something different by myself, days back with the OES_draw_texture extension and it worked (besides getting the procaddress of glDrawTexOES from from libopengles_lite.so)

Doh. Such a simple solution. Thanks crow_riot, I'll give it a try. I'm porting my PC engine to the Wiz and I used point sprites for the 3D particle system.

Cheers
Kurt

 

[crow_riot]

i just looked at the libopengles_lite.so file - and it seems glPointSizePointerOES exists. so you might be lucky with that

 

[kurtkz]

i just looked at the libopengles_lite.so file - and it seems glPointSizePointerOES exists. so you might be lucky with that

Mmm, glPointSize applies to all GL_POINTS though, not just GL_POINT_SPRITE...still I hope your suggestion works. I'm too tired to actually test it now though - if it doesn't work I guess I'll have to manually generate front-facing quads. Perish the thought

 

[crow_riot]

uh mixed them up, my bad. BUT another search gave 'g_GTECode_render_pointsprite_all' ... so good luck

 

[kurtkz]

uh mixed them up, my bad. BUT another search gave 'g_GTECode_render_pointsprite_all' ... so good luck

Heh, turns out the call is GL_POINT_SPRITE_OES *not* GL_POINT_SPRITE. Thanks for the help though, crow_riot.

 

[crow_riot]

meh, ok but that you say GL_POINT_SPRITE_OES are working then? because i wonder - i think it's another OES extension that is not reported within the extensions string but working?

 

[kurtkz]

I guess so, I haven't actually tested it yet, but it compiles fine and apparently for GL ES (according to Typhoon Labs tutorials), the correct call is GL_POINT_SPRITE_OES.