braindam...@lowtown.se wrote:
>> braindam...@lowtown.se wrote:
>>
>>> I'm trying to simply draw a rectangle with a color. I've managed to do
>>> this in PyOpenGL alone, but I find it eluding me in pyglet.
>>>
>>> There's no problem drawing the GL_QUADS without the color option. It
>>> shows
>>> up nice and white on the screen. When I try to add a color, it just goes
>>> black.
>>>
>>> pyglet.graphics.draw(4, pyglet.gl.GL_QUADS, ('v2i', tuplewithpoints),
>>> ('c3B', tuplewithallpointsnormalcolors))
>>>
>>>
>>> There's two questions. Is there a way of assigning the color to this
>>> quad
>>> with only one variable instead of four? I don't want to give each vertex
>>> a
>>> color when all of them are the same.
>>> How do I get colors to work at all? heh..
>>>
>>> The reference and programmers guide offer little explanation.
>>>
>>>
>> Leave out the c3B color-per-vertex stuff, and set the color with
>> glColor3f(r,g,b) before calling the pyglet.graphics.draw(...). This
>> assumes you are not doing lighting, which is the default, or specified
>> with glDisable(GL_LIGHTING).
>>
>> If you *are* doing lighting with glEnable(GL_LIGHTING) then glColor is
>> ignored and you need to supply many lighting and material properties
>> with calls to glLight, and glMaterial -- but that's another story...
>>
>> Gary Herron
>>
>>
>
> That did the trick alright. I had missed that the pyglet.gl gave all the
> openGL functions. Thanks!
>
Glad to help.
> I'm a bit curious what the c3B is for though.
>
If you want the color of an object to vary vertex-by-vertex you can
associate a (different) color with each vertex. OpenGL will interpolate
those colors across the object.
Gary Herron
>
>
> >
>
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