I'm glad that my branch was at least a little useful. Just for future reference in case others come across this thread, there is an OpenGL wiki page here that has an overview of the "problem": https://www.opengl.org/wiki/Transparency_Sorting
On Wednesday, October 19, 2016 at 6:41:58 AM UTC+9, Charles wrote: > > I apologize for the delay, I didn't really check back here after there > wasn't much activity for a few weeks and figured I wouldn't be able to do > what I needed. > > Thanks for taking the time to test this! I did not realize the sprite > group resets things as well. I did try it and it does seem a lot better > than what I had implemented. However, the same alpha issues do arise; some > things on the same z level will have proper alpha while other objects may > not. I did have to change to 0.1 instead of 0.5 for it to even show up at > all. I suspect this might be part of the opacity stuff you were talking > about. > > On Friday, September 30, 2016 at 9:30:19 AM UTC-5, Benjamin Moran wrote: >> >> Hi Charles, >> >> I have a zsprite branch (that probably has the same changes that you've >> already made) that can be found here: >> https://bitbucket.org/treehousegames/pyglet/branch/z_sprite >> >> The OpenGL blending/code you posted looks fine, but it might be getting >> overridden by the SpriteGroup (pyglet.sprite.SpriteGroup) . My branch is >> not yet complete, but I've also modified the SpriteGroup class so that it's >> at least working OK for me. it only works right for simple >> transparent/solid alpha (not opacity), but it does render all sprites in >> the correct z order. Give it a try and see if it works for you. The z >> scale is set to be from -255 to 255. >> >> I will probably fix the opacity stuff at some point... >> >> >> >> On Thursday, September 1, 2016 at 8:28:43 AM UTC+9, Charles wrote: >>> >>> I am using a standard blending of GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA. >>> Here is an example of what doesn't work: >>> >>> import pyglet, random >>> from pyglet.gl import * >>> >>> window = pyglet.window.Window(800,600, vsync=False) >>> >>> fps = pyglet.clock.ClockDisplay() >>> >>> groups = [] >>> group = pyglet.graphics.Group() >>> >>> tileImages = [pyglet.image.load("tile_test.png")] >>> >>> batch = pyglet.graphics.Batch() >>> >>> fadedImage = pyglet.image.load("wide-shadow-faded.png").get_texture() >>> playerImage = pyglet.image.load("player.png").get_texture() >>> treeImage = pyglet.image.load("tree.png").get_texture() >>> >>> >>> glEnable(GL_DEPTH_TEST) >>> glEnable(GL_BLEND) >>> glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) >>> glAlphaFunc ( GL_GREATER, 0.1 ) ; >>> glEnable ( GL_ALPHA_TEST ) ; >>> >>> tiles = [] >>> for i in range(40): >>> for j in range(40): >>> tile = pyglet.sprite.Sprite(random.choice(tileImages), >>> batch=batch, x=i*24, y=j*24, usage='static', group=group, subpixel=True) >>> tiles.append(tile) >>> >>> print len(tiles) >>> >>> >>> player = pyglet.sprite.Sprite(playerImage, batch=batch, group=group, >>> x=10, y=10, z=0.3, subpixel=True) >>> >>> tree = pyglet.sprite.Sprite(treeImage, batch=batch, group=group, x=30, >>> y=30, z=0.5, subpixel=True) >>> >>> fadedSprite = pyglet.sprite.Sprite(fadedImage, batch=batch, group=group, >>> x=100, y=100, z=0.5, subpixel=True) >>> >>> >>> @window.event >>> def on_draw(): >>> window.dispatch_events() >>> window.clear() >>> batch.draw() >>> fps.draw() >>> >>> pyglet.app.run() >>> >>> >>> >>> The 'fadedImage' is basically just any image that has pixels of alpha >>> between 0 and 1 like a fade. If you take out the player and sprite, it may >>> sometimes show up properly, but if you reload it may change to all black, >>> it's never consistent. >>> >>> >>> On Tuesday, August 30, 2016 at 11:53:29 PM UTC-5, magu...@gmail.com >>> wrote: >>>> >>>> In what way are you blending objects? The source of that issue could be >>>> a number of things, could you provide a working example? Generally you >>>> should only have to update each visible objects vertices and Z axis every >>>> update cycle. >>>> >>>> Also, you can increase the depth range of the Z axis by setting up a >>>> custom config: >>>> >>>> config = Config(sample_buffers=1, samples=4, depth_size=1000, >>>> double_buffer=True) >>>> >>>> class Example(pyglet.window.Window): >>>> def __init__(self): >>>> super(Example, self).__init__(640, 480, resizable=True, >>>> fullscreen=False, caption="Example", config=config) >>>> >>>> >>>> -- You received this message because you are subscribed to the Google Groups "pyglet-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to pyglet-users+unsubscr...@googlegroups.com. To post to this group, send email to pyglet-users@googlegroups.com. Visit this group at https://groups.google.com/group/pyglet-users. For more options, visit https://groups.google.com/d/optout.
