Hi Josh,
If you look at the AbstractAttribute class in
pyglet/graphics/vertexattribute.py, it might shed some light on things.
The vertex_list attributes are just ctype arrays, which are part of a large
buffer. If you look at `domain.attributes`, you can find the buffers there.
You should be able to move the data directly into those buffers.
On Monday, August 27, 2018 at 8:29:29 AM UTC+9, Josh wrote:
>
> Is there a more efficient way to update large vertex list buffers than
> vertex_list.attribute = some_iterable? For example, I'm guessing that by
> default vertex_list.set_attribute is converting the iterable to a ctypes
> array at some point. If I have the data in a numpy array and access it
> directly as a ctypes array, could I skip this step?
>
> On Sat, Aug 25, 2018 at 9:54 AM Joshua Dempster <pana...@gmail.com
> <javascript:>> wrote:
>
>> Thanks Ben! No reason not to use batches, just trying to understand the
>> low-level module.
>>
>> On Thu, Aug 23, 2018 at 10:37 PM Benjamin Moran <benmo...@gmail.com
>> <javascript:>> wrote:
>>
>>> Hi Josh,
>>>
>>> There is a typo with the vertex color type. It looks like you want to
>>> use 8bit values, so If you change *c4b* to *c4B* it should work.
>>>
>>> By the way, is there a specific reason you're using Domains directly,
>>> instead of just creating a Batch? There is nothing wrong with your
>>> approach, but using a Batch might save a bit of boilerplate.
>>>
>>> -Ben
>>>
>>> On Thursday, August 23, 2018 at 3:13:34 AM UTC+9, Josh wrote:
>>>>
>>>> Hi all,
>>>>
>>>> I have what (I thought) is a MWE for drawing primitives with a
>>>> VertexDomain:
>>>> import pyglet
>>>> from pyglet.gl import *
>>>>
>>>> if __name__ == '__main__':
>>>>
>>>> display = pyglet.window.Window(400, 400)
>>>>
>>>>
>>>> domain = pyglet.graphics.vertexdomain.create_domain('v2i/stream',
>>>> 'c4b/stream')
>>>> vertex_list = domain.create(4)
>>>> vertex_list.vertices = [50, 50, 50, 100, 100, 100, 100, 50]
>>>> vertex_list.colors = [
>>>> 255, 255, 255, 255,
>>>> 255, 0, 0, 255,
>>>> 0, 255, 0, 255,
>>>> 0, 0, 255, 255
>>>> ]
>>>>
>>>> @display.event
>>>> def on_draw():
>>>> display.clear()
>>>> pyglet.graphics.draw(1, GL_POINTS, ('v2i',(10,20)))
>>>> domain.draw(GL_POINTS)
>>>>
>>>> pyglet.app.run()
>>>>
>>>> However, while the single pixel drawn directly by
>>>> pyglet.graphics.drawshows up, the points from the vertex domain don't.
>>>> What
>>>> am I missing?
>>>>
>>>>
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