Hi,
The problem you have is that both vertices lists have the same *domain*,
which means same format, same group and same OpenGL mode. The doc
<http://pyglet.readthedocs.org/en/latest/api/pyglet/pyglet.graphics.html#drawing-modes>
says
> However, because of the way the graphics API renders multiple primitives
> with shared state, GL_POLYGON, GL_LINE_LOOP and GL_TRIANGLE_FAN cannot be
> used — the results are undefined.
In order to make different filled polygons (in your case 24 sided polygons)
live together in a batch, you will have to use an OpenGL mode like
GL_TRIANGLE and make instead an indexed vertex list to mimic a triangle fan
behaviour.
Here is a sample code based on your previous code.
import pyglet, math, random
from pyglet.gl import *
window = pyglet.window.Window(800,600)
batch = pyglet.graphics.Batch()
def create_circle(x, y, radius, batch):
circle, indices = create_indexed_vertices(x, y, radius)
vertex_count = len(circle) // 2
vertex_list = batch.add_indexed(vertex_count, pyglet.gl.GL_TRIANGLES,
None,
indices,
('v2f', circle),
('c4f', (1, 1, 1, 0.8) * vertex_count))
def create_indexed_vertices(x, y, radius, sides=24):
vertices = [x, y]
for side in range(sides):
angle = side * 2.0 * math.pi / sides
vertices.append(x + math.cos(angle) * radius)
vertices.append(y + math.sin(angle) * radius)
# Add a degenerated vertex
vertices.append(x + math.cos(0) * radius)
vertices.append(y + math.sin(0) * radius)
indices = []
for side in range(1, sides+1):
indices.append(0)
indices.append(side)
indices.append(side + 1)
return vertices, indices
for i in range(2):
create_circle(window.width*random.random(),
window.height*random.random(), 20, batch)
@window.event
def on_draw():
window.clear()
batch.draw()
pyglet.app.run()
There may be a better way, but at least this works. :)
Dan.
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