Add wx.glcanvas

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@72931 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/glcanvas/GLCanvas.py

@@ -0,0 +1,170 @@
+
+import sys
+
+import wx
+import wx.glcanvas as glcanvas
+
+
+try:
+    from OpenGL.GL import *
+    from OpenGL.GLUT import *
+    haveOpenGL = True
+except ImportError:
+    haveOpenGL = False
+
+#----------------------------------------------------------------------
+
+
+
+class MyCanvasBase(glcanvas.GLCanvas):
+    def __init__(self, parent):
+        glcanvas.GLCanvas.__init__(self, parent, -1)
+        self.init = False
+        self.context = glcanvas.GLContext(self)
+        
+        self.lastx = self.x = 30
+        self.lasty = self.y = 30
+        self.size = None
+        
+        self.SetBackgroundStyle(wx.BG_STYLE_PAINT)
+        
+        self.Bind(wx.EVT_SIZE, self.OnSize)
+        self.Bind(wx.EVT_PAINT, self.OnPaint)
+        self.Bind(wx.EVT_LEFT_DOWN, self.OnMouseDown)
+        self.Bind(wx.EVT_LEFT_UP, self.OnMouseUp)
+        self.Bind(wx.EVT_MOTION, self.OnMouseMotion)
+
+
+
+    def OnSize(self, event):
+        wx.CallAfter(self.DoSetViewport)
+        event.Skip()
+
+
+    def DoSetViewport(self):
+        size = self.size = self.GetClientSize()
+        self.SetCurrent(self.context)
+        glViewport(0, 0, size.width, size.height)        
+
+
+    def OnPaint(self, event):
+        dc = wx.PaintDC(self)
+        self.SetCurrent(self.context)
+        if not self.init:
+            self.InitGL()
+            self.init = True
+        self.OnDraw()
+
+
+    def OnMouseDown(self, evt):
+        self.CaptureMouse()
+        self.x, self.y = self.lastx, self.lasty = evt.GetPosition()
+
+
+    def OnMouseUp(self, evt):
+        self.ReleaseMouse()
+
+
+    def OnMouseMotion(self, evt):
+        if evt.Dragging() and evt.LeftIsDown():
+            self.lastx, self.lasty = self.x, self.y
+            self.x, self.y = evt.GetPosition()
+            self.Refresh(False)
+
+
+
+
+class CubeCanvas(MyCanvasBase):
+    def InitGL(self):
+        # set viewing projection
+        glMatrixMode(GL_PROJECTION)
+        glFrustum(-0.5, 0.5, -0.5, 0.5, 1.0, 3.0)
+
+        # position viewer
+        glMatrixMode(GL_MODELVIEW)
+        glTranslatef(0.0, 0.0, -2.0)
+
+        # position object
+        glRotatef(self.y, 1.0, 0.0, 0.0)
+        glRotatef(self.x, 0.0, 1.0, 0.0)
+
+        glEnable(GL_DEPTH_TEST)
+        glEnable(GL_LIGHTING)
+        glEnable(GL_LIGHT0)
+
+
+    def OnDraw(self):
+        # clear color and depth buffers
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
+
+        # draw six faces of a cube
+        glBegin(GL_QUADS)
+        glNormal3f( 0.0, 0.0, 1.0)
+        glVertex3f( 0.5, 0.5, 0.5)
+        glVertex3f(-0.5, 0.5, 0.5)
+        glVertex3f(-0.5,-0.5, 0.5)
+        glVertex3f( 0.5,-0.5, 0.5)
+
+        glNormal3f( 0.0, 0.0,-1.0)
+        glVertex3f(-0.5,-0.5,-0.5)
+        glVertex3f(-0.5, 0.5,-0.5)
+        glVertex3f( 0.5, 0.5,-0.5)
+        glVertex3f( 0.5,-0.5,-0.5)
+
+        glNormal3f( 0.0, 1.0, 0.0)
+        glVertex3f( 0.5, 0.5, 0.5)
+        glVertex3f( 0.5, 0.5,-0.5)
+        glVertex3f(-0.5, 0.5,-0.5)
+        glVertex3f(-0.5, 0.5, 0.5)
+
+        glNormal3f( 0.0,-1.0, 0.0)
+        glVertex3f(-0.5,-0.5,-0.5)
+        glVertex3f( 0.5,-0.5,-0.5)
+        glVertex3f( 0.5,-0.5, 0.5)
+        glVertex3f(-0.5,-0.5, 0.5)
+
+        glNormal3f( 1.0, 0.0, 0.0)
+        glVertex3f( 0.5, 0.5, 0.5)
+        glVertex3f( 0.5,-0.5, 0.5)
+        glVertex3f( 0.5,-0.5,-0.5)
+        glVertex3f( 0.5, 0.5,-0.5)
+
+        glNormal3f(-1.0, 0.0, 0.0)
+        glVertex3f(-0.5,-0.5,-0.5)
+        glVertex3f(-0.5,-0.5, 0.5)
+        glVertex3f(-0.5, 0.5, 0.5)
+        glVertex3f(-0.5, 0.5,-0.5)
+        glEnd()
+
+        if self.size is None:
+            self.size = self.GetClientSize()
+        w, h = self.size
+        w = max(w, 1.0)
+        h = max(h, 1.0)
+        xScale = 180.0 / w
+        yScale = 180.0 / h
+        glRotatef((self.y - self.lasty) * yScale, 1.0, 0.0, 0.0);
+        glRotatef((self.x - self.lastx) * xScale, 0.0, 1.0, 0.0);
+
+        self.SwapBuffers()
+
+
+
+
+#----------------------------------------------------------------------
+
+
+if __name__ == '__main__':
+    app = wx.App(False)
+    if not haveOpenGL:
+        wx.MessageBox('This sample requires the PyOpenGL package.', 'Sorry')
+    else:
+        frm = wx.Frame(None, title='GLCanvas Sample')
+        canvas = CubeCanvas(frm)
+        frm.Show()
+    app.MainLoop()
+
+
+
+#----------------------------------------------------------------------
+