On Jul 23, 10:07 pm, Clay Hobbs <[EMAIL PROTECTED]> wrote: > I need a tutorial for PyOpenGL (specifically, to be used with wxPython). > I searched with Google and didn't find one. Does anybody know where one > is?
PyOpenGL is just a wrapper for OpenGL. The API is identical. Do you need an OpenGL tutorial? As for wxPython, you just subclass wxGLCanvas. Call the method SetCurrent() before you call OpenGL (e.g. through PyOpenGL) and SwapBuffers() when you are done. See the wxWidgets reference. Personally I think PyOpenGL is a slow beast. It is not just a thin wrapper over OpenGL, but bloated with sanity checks, exception handling, etc (look at the code, it is pure Python and easy to read). I prefer to put all calls to OpenGL in a C DLL, and call that with ctypes. If I make repeated calls to functions like glVertex3f, I want them to to be fast, thus C is indicated over Python. And if all I do in C is to make calls into OpenGL, there is no real advantage to using Python here - the Python code would look almost exactly the same, but would be slower by several orders of magnitude. By the way, I still use wxGLCanvas from wxPython to set things up. The ctypes call into my C DLL is called between SetCurrent() and SwapBuffers(). If you want a pure Python solution, you will need to use display lists, vertex arrays (with NumPy) or vertex buffers (if your graphics card supports it) to get acceptable performance. Here is a short tutorial: import wx import wx.glcanvas import ctypes glrender = ctypes.pydll.glrender.render # use ctypes.cdll to call with GIL released glrender.argtypes = (ctypes.c_int, ctypes.c_int,) glrender.restype = None class MyCanvas(wx.glcanvas.GLCanvas): def __init__(self, parent): attribList = (wx.glcanvas.WX_GL_DOUBLEBUFFER, wx.glcanvas.WX_GL_RGBA, 0) wx.glcanvas.GLCanvas.__init__(self, parent, -1, attribList = attribList) self.context = wx.glcanvas.GLContext(self) self.Bind(wx.EVT_SIZE, self.OnSize) self.Bind(wx.EVT_PAINT, self.OnPaint) def OnSize(self, evt): w,h = self.GetClientSize() self.w = w self.h = h dc = wx.ClientDC(self) self.Render(dc) def OnPaint(self, evt): dc = wx.PaintDC(self) self.Render(dc) def Render(self, dc): self.SetCurrent() glrender(self.w, self.h) self.SwapBuffers() And then in glrender.c, put the following: #include <GL\gl.h> #include <GL\glu.h> #include <GL\glext.h> __declspec(dllexport) void render(int w, int h) { /* calls to OpenGL goes here */ return; } And for Python 2.5.x on Windows, compile with: gcc -O2 -o glrender.dll -shared -lopengl -lmsvcr71 glrender.c -- http://mail.python.org/mailman/listinfo/python-list