Dear Greg,
many thanks for your reply and the explanatory references. I feel
illuminated!
Now I understand why my call self.batch.add(count,GL_TEXTURE_CUBE_MAP,
None, ('v3f/static', vertex_data)
demands a vertex list of 24 elements rather than 6.
On Friday, April 24, 2020 at 5:05:36 PM UTC+1, Nicky Mac wrote:
>
> I'm working with Python3.6 and Pyglet, Interested in displaying a very
> large number of variously textured blocks in Minecraft style., I wondered
> if using GL_TEXTURE_CUBE_MAP would improve performance compared to
> rendering the 6 faces each time. Using cubemap (from
> https://www.programcreek.com/python/example/97888/pyglet.gl) I created
> my cubes and noted the returned identifiers.
> Having studied the lists of CubeMap issues, I could not find any example
> of such a cube actually being drawn *B*ewildered by the range of gl and
> pyglet graphics calls possible, I still have no idea how to draw a textured
> cube, I was excited to find that GL_TEXTURE_CUBE could be specified in
> pyglet.graphics (tho not documented) but I can't get the draw to work. Here
> is my relevant code and output:
>
> x, y, z = position
> vertex_data = cube_vertices(x, y, z, 0.5) # create vertex list
> glEnable(GL_TEXTURE_CUBE_MAP)
> glBindTexture(GL_TEXTURE_CUBE_MAP, cubemap) # cubemap is the
> textured-cube identifier
> count = len(vertex_data)
> pyglet.graphics.draw(count,GL_TEXTURE_CUBE_MAP, None,
> ('v3f/static', vertex_data), ('t3f/static'))
>
> ('v3f/static', vertex_data), ('t3f/static'))
> File "C:\Python\Python36\lib\site-packages\pyglet\graphics\__init__.py",
> line 193, in draw
> for format, array in data:
> TypeError: 'NoneType' object is not iterable
>
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