Garrett

I know I'm missing a gl command about texture wrapping or my texture is the wrong shape or something like that but I can't get my texture to only display once and the correct way (not flipped over on the x-axis) - any ideas?

opengl-texture-setting-in-jit-gl-sketch

reset, glmatrixmode modelview, glpushmatrix, glcolor 1. 1. 1. 1., glenable texture_2d, glbindtexture line1tex, glenable blend, glblendfunc 7 7, glbegin quads, gltexcoord -1. -0.5, glvertex -1. 0.5, gltexcoord 1. -0.5, glvertex 1. 0.5, gltexcoord 1. 0.5, glvertex 1. -0.5, gltexcoord -1. 0.5, glvertex -1. -0.5, glend, gldisable texture_2d, gldisable blend, glpopmatrix,


so texture mapping is clockwise from top left and quad drawing is anti-clockwise from bottom left. mmmmm bit confusing. thanks.

on topic whats a good opengl book to read apart from the red and blue books, someone here recommended this:

http://www.amazon.co.uk/opengl-R-Distilled-Paul-Martz/dp/0321336798/ref=pd_bbs_sr_9?ie=UTF8&s=books&qid=1231880182&sr=8-9

so texture mapping is clockwise from top left and quad drawing is anti-clockwise from bottom left. mmmmm bit confusing.  thanks.

reset, glmatrixmode modelview, glpushmatrix, glcolor 1. 1. 1. 1., glbindtexture line1tex, glenable blend, glblendfunc 7 7, glbegin quads, gltexcoord -1. -0.5, glvertex -1. 0.5, gltexcoord 1. -0.5, glvertex 1. 0.5, gltexcoord 1. 0.5, glvertex 1. -0.5, gltexcoord -1. 0.5, glvertex -1. -0.5, glend, gldisable blend, glpopmatrix,

You don't actually need the glenable/disable of texture_2d. Jitter takes care of that for you with the glbindtexture command

You don't actually need the glenable/disable of texture_2d.  Jitter takes care of that for you with the glbindtexture command

oh and what about the repeating? I'm missing something about how the texture maps, I only want the line of text to show once.

oh and what about the repeating?  I'm missing something about how the texture maps, I only want the line of text to show once.

texture coordinates go from 0,0 to 1,1 (top left to bottom right, i think).

extending beyond that range causes the tiling.

reset, glmatrixmode modelview, glpushmatrix, glcolor 1. 1. 1. 1., glbindtexture line1tex, glenable blend, glblendfunc 7 7, glbegin quads, gltexcoord 0. 0., glvertex -1. 0.5, gltexcoord 1. 0., glvertex 1. 0.5, gltexcoord 1. 1., glvertex 1. -0.5, gltexcoord 0. 1., glvertex -1. -0.5, glend, gldisable blend, glpopmatrix

texture coordinates go from 0,0 to 1,1 (top left to bottom right, i  think).
extending beyond that range causes the tiling.

beginning to make more sense now, many thanks.

Almost there I think. I'm working from an example that was here on the forum (can't find it now so I've attached it in a zip) but I can't get my text to render at exactly its correct size (i.e. as smooth as in the attached file). I know I'm just wrong on a few pixels somewhere but can't seem to figure out whether its in the matrix creation or in the gl drawing part. Thanks in advance.

Almost there I think. I'm working from an example that was here on the forum (can't find it now so I've attached it in a zip) but I can't get my text to render at exactly its correct size (i.e. as smooth as in the attached file).  I know I'm just wrong on a few pixels somewhere but can't seem to figure out whether its in the matrix creation or in the gl drawing part.  Thanks in advance.

opengl texture setting in jit.gl.sketch