hi,
i have been using batches and groups with sprites to get something like a
scene graph.
i found that only if i do:
sprite.group = group
sprite.batch = batch
i will get the correct behavior. if i do
sprite.batch = batch
sprite.group = group
strange things happen.
You can find a sample attached. (non working, reorder group and batch to
fix)
Lucio.
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import pyglet
from pyglet.gl import *
window = pyglet.window.Window()
grossini = pyglet.resource.image("grossini.png")
grossini.anchor_x = grossini.width / 2
grossini.anchor_y = grossini.height / 2
class MySpriteGroup(pyglet.graphics.Group):
def __init__(self, sprite):
super(MySpriteGroup, self).__init__(parent=sprite.group)
self.sprite = sprite
def set_state(self):
glPushMatrix()
self.transform()
def unset_state(self):
glPopMatrix()
def transform( self ):
"""Apply ModelView transformations"""
if self.sprite.position != (0,0):
glTranslatef( self.sprite.position[0], self.sprite.position[1], 0 )
if self.sprite.scale != 1.0:
glScalef( self.sprite.scale, self.sprite.scale, 1)
if self.sprite.rotation != 0.0:
glRotatef( -self.sprite.rotation, 0, 0, 1)
batch = pyglet.graphics.Batch()
s1 = pyglet.sprite.Sprite( grossini )
s1.batch = batch
s1.position=(320,100)
g1 = MySpriteGroup(s1)
s2 = pyglet.sprite.Sprite( grossini )
s2.batch = batch
s2.group = g1
s2.position=(00,100)
g2 = MySpriteGroup(s2)
s3 = pyglet.sprite.Sprite( grossini )
s3.batch = batch
s3.group = g2
s3.position=(00,100)
def update(dt):
s1.rotation += 360*dt
s2.rotation += 360*dt
s3.rotation += 360*dt
pyglet.clock.schedule_interval(update, 1/60.)
@window.event
def on_draw():
window.clear()
batch.draw()
pyglet.app.run()
