Re: adding tex_map into gl_commands routine

On Oct 23, 2006, at 5:43 AM, yair reshef wrote:

> hi, i am trying to specify tex_map and tex_map_plane for a
> gl_commands command.
> my current command: reset, glenable texture, glbindtexture
> echo_tex, shapeslice 40, cylinder $1 $2 0. $3 $4, gldisable
> texture, gldisable
>
> i want to add to this:
> tex_map 1, tex_plane_s 0.5 0. 0. 0.5, tex_plane_t 0. -0.6 0. 0.5

You can't intermix standard jitter object attributes with opengl
commands inside a jit.gl.sketch command list, unless you're using
"immediate" mode (which should probably only be used from JS/Java/C).
I would recommend using the corresponding OpenGL calls to accomplish
this.

In OpenGL, these attributes correspond to the following C code. Of
course, you'll want to convert to appropriate jit.gl.sketch syntax
(convert everything to lower case, remove GL_ from the beginning of
symbolic constants, etc.).

// texture mapping modes
switch (ob3d->tex_map)
{
case 1:
    glEnable(GL_TEXTURE_GEN_S);
    glEnable(GL_TEXTURE_GEN_T);        
    glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
    glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
    glTexGenfv(GL_S, GL_OBJECT_PLANE, ob3d->tex_plane_s);
    glTexGenfv(GL_T, GL_OBJECT_PLANE, ob3d->tex_plane_t);
    break;
case 2:
    glEnable(GL_TEXTURE_GEN_S);
    glEnable(GL_TEXTURE_GEN_T);        
    glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
    glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
    break;
case 3:
    glEnable(GL_TEXTURE_GEN_S);
    glEnable(GL_TEXTURE_GEN_T);        
    glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
    glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
    glTexGenfv(GL_S, GL_EYE_PLANE, ob3d->tex_plane_s);
    glTexGenfv(GL_T, GL_EYE_PLANE, ob3d->tex_plane_t);
    break;
default:
    glDisable(GL_TEXTURE_GEN_S);
    glDisable(GL_TEXTURE_GEN_T);
    break;
}

Hope this helps.

-Joshua