"""OpenGLDemo.py -- A simple demo of using OpenGL with Cocoa
To build the demo program, run this line in Terminal.app:
$ python setup.py py2app -A
This creates a directory "dist" containing OpenGLDemo.app. (The
-A option causes the files to be symlinked to the .app bundle instead
of copied. This means you don't have to rebuild the app if you edit the
sources or nibs.)
This example requires PyOpenGL
"""
from Cocoa import *
from OpenGL.GL import *
from PyObjCTools import AppHelper
ClearColors = redIndex, greenIndex, blueIndex, alphaIndex = range(4)
class OpenGLDemoView(NSOpenGLView):
def awakeFromNib(self):
self.color_index = alphaIndex
def initWithFrame_(self, frame):
attribs = [
NSOpenGLPFANoRecovery,
NSOpenGLPFAWindow,
NSOpenGLPFAAccelerated,
NSOpenGLPFADoubleBuffer,
NSOpenGLPFAColorSize, 24,
NSOpenGLPFAAlphaSize, 8,
NSOpenGLPFADepthSize, 24,
NSOpenGLPFAStencilSize, 8,
NSOpenGLPFAAccumSize, 0,
]
fmt = NSOpenGLPixelFormat.alloc().initWithAttributes_(attribs)
self = super(OpenGLDemoView, self).initWithFrame_pixelFormat_(frame, fmt)
return self
@objc.IBAction
def setClearColor_(self, sender):
self.color_index = sender.tag()
self.setNeedsDisplay_(True)
def drawRect_(self, ((x, y), (w, h))):
glViewport(0, 0, w, h)
clear_color = [0.0]*4
clear_color[self.color_index] = 1.0
glClearColor(*clear_color)
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT)
self.openGLContext().flushBuffer()
if __name__ == "__main__":
AppHelper.runEventLoop()
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