thank you for the help. I could do that.
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class GroupWithMask(pyglet.graphics.Group):
def __init__(self, x, y, width, height, parent=None):
super(GroupWithMask, self).__init__(parent)
self.x = x
self.y = y
self.width = width
self.height = height
def set_state(self):
pyglet.gl.glScissor(self.x, self.y, self.width, self.height)
pyglet.gl.glEnable(pyglet.gl.GL_SCISSOR_TEST)
def unset_state(self):
pyglet.gl.glDisable(pyglet.gl.GL_SCISSOR_TEST)
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I don't know if it's the best way. I really know nothing about the
GL_stuff. this is a bit hard for me.
But now, I could get interpolation, set of sprites and mask working. I
think that's enough for my 2D applications ;)
On Feb 23, 9:02 pm, Casey Duncan <[email protected]> wrote:
> If you have a set of sprites that all need a particular mask, then in
> general those sprites should belong to a pyglet group that sets up the
> mask. Using a scissor mask seems easiest for rectangular masking, for
> other shapes you could use the stencil buffer or multi texturing.
>
> I did a quick grep of the pyglet source and I don't see an existing
> scissor group implementation, so you'll need to make one. Basically
> you just need to subclass pyglet.graphics.Group and implement the
> set_state() and unset_state() methods to setup and teardown the
> desired scissor rectangle. The rectangle could just be stored as some
> custom attributes on your group class (maybe left, top, width,
> height?).
>
> -Casey
>
> On Tue, Feb 23, 2010 at 12:33 PM, Philippe <[email protected]> wrote:
> > hum, sorry for the double post.
>
> > On 23 fév, 18:45, Philippe <[email protected]> wrote:
> >> oh, seems like my last post did not work :/
>
> >> for me, a mask is that:http://www.entheosweb.com/Flash/masking.asp
> >> in this sample, the mask is a moving circle. the sprite is the photo.
> >> a mask can be of any shape, and applied to any number of sprites, it
> >> is invisible, but hides sprites is specify.
>
> >> to describe little bit more my actuall need:
> >> I have 5 group of 10 sprites. a group is a set of sprites, not a
> >> pyglet.graphics.OrderedGroup(). each group has a different batch.
>
> >> I need to apply rectangular masks on them (on mask per group).
> >> the sprites are moving, the mask keep fix.
>
> >> I hope it's easier to understand my question.
>
> >> Philippe
>
> >> On Feb 23, 6:20 pm, Casey Duncan <[email protected]> wrote:
>
> >> > What exactly are you trying to do? I'm skeptical that scissoring each
> >> > sprite independently is really what you want, not that it isn't
> >> > possible. Perhaps if we understood what you are doing better in the
> >> > abstract we could formulate a good solution.
>
> >> > -Casey
>
> >> > On Tue, Feb 23, 2010 at 9:59 AM, Philippe <[email protected]>
> >> > wrote:
> >> > > Hi,
>
> >> > > I searched a lot how to do something with your recommandations:
> >> > > """As long as you render each group separately, yes.
>
> >> > > In pyglet, the best way to implement this would probably be a
> >> > > 'ScissorGroup'
> >> > > (much like OrderedGoup), which handles setting and unsetting the
> >> > > scissor
> >> > > rectangle. if I recall correctly, there might already be a
> >> > > ScissorGroup
> >> > > hidden away somewhere in the text rendering implementation... """
>
> >> > > but could not find.
> >> > > I'm afraid I do not look in the right direction.
> >> > > first, I am not sure to understand "As long as you render each group
> >> > > separately, yes."
> >> > > My group of sprites are in different batch. is it what you mean ?
>
> >> > > I know how to use Scissor to apply a mask on my total application
> >> > > pyglet.gl.glScissor(offset_x, offset_y, 800, 480)
> >> > > pyglet.gl.glEnable(pyglet.gl.GL_SCISSOR_TEST)
>
> >> > > But I do not see how to apply it to a single Sprite.
> >> > > Can you give me a advice on that ?
>
> >> > > thank you
>
> >> > > On Feb 16, 5:21 pm, Tristam MacDonald <[email protected]> wrote:
> >> > >> On Tue, Feb 16, 2010 at 10:36 AM, Philippe <[email protected]>
> >> > >> wrote:
> >> > >> > it's possible to apply different scissor_test to different group of
> >> > >> > sprites ?
>
> >> > >> As long as you render each group separately, yes.
>
> >> > >> In pyglet, the best way to implement this would probably be a
> >> > >> 'ScissorGroup'
> >> > >> (much like OrderedGoup), which handles setting and unsetting the
> >> > >> scissor
> >> > >> rectangle. if I recall correctly, there might already be a
> >> > >> ScissorGroup
> >> > >> hidden away somewhere in the text rendering implementation...
>
> >> > >> --
> >> > >> Tristam MacDonaldhttp://swiftcoder.wordpress.com/
>
> >> > > --
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>
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