If anyone could clear something up it would be much appreciated.
I have a full screen sprite, made from a file over the top of a
Coloured layer, white. I thought if I reduced the opacity of the
sprite it would tend to white, or whatever colour I set the coloured
layer to.
Instead it tends to black?
If I have no sprite the layer is whatever colour I set it to.
Probably me but I thought I'd ask.
I'm using cocos2d-0.3.0rc0 and my test code is below.
Thanks in advance.
john
from cocos.layer import Layer, ColorLayer
from cocos.sprite import Sprite
class Slide(ColorLayer):
def __init__( self, filename= None, a = 255, r = 255, g = 255, b =
255):
super(Slide, self).__init__(r,g,b,a)
self.BackgroundSprite = None
if filename is None:
self.BackgroundFilename = ""
else:
self.setBackground(filename, a)
def setBackground(self, filename, alphaVal = 255):
if self.BackgroundSprite is not None:
# remove the current background
self.remove(self.BackgroundSprite)
self.BackgroundFilename = filename
self.BackgroundSprite = Sprite( self.BackgroundFilename)
# Must add the background image
self.add(self.BackgroundSprite, z=10)
# set the picture to the centre, this appears to be relative so
# resizing the window keeps the picture in the centre, as well as
# resizing it.
self.BackgroundSprite.position = (self.width/2, self.height/2)
self.setBackgroundOpacity(alphaVal)
def setBackgroundOpacity(self, opacity):
"""Sets the opacity of the background layer
Parameters
opacity 0 means fully transparent, 255 mean fully opaque
"""
if self.BackgroundSprite is not None:
self.BackgroundSprite.opacity = opacity % 256
# basic test case
if __name__ == "__main__":
from cocos.director import director
from cocos.scene import Scene
director.init(resizable=True)
# Produces a Black screen
#slide1 = Slide("components\\testData\\firePit.jpg", 0)
# produce a white slide
#slide1 = Slide()
# puts the image in the windoe
#slide1 = Slide("components\\testData\\firePit.jpg")
scene1 = Scene( slide1 )
director.run( scene1 )
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