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[[oktatas:programozás:python:wxpython_gui|< wxPython GUI]]

====== wxPython OpenGL ======

  * **Szerző:** Sallai András
  * Copyright (c) Sallai András, 2020
  * [[https://creativecommons.org/licenses/by-sa/4.0/|CC Attribution-Share Alike 4.0 International]]
  * Web: https://szit.hu

===== Koordináta tengelyek rajzolása =====

<code python koordinatarendszer.py>
import sys

import wx
import wx.glcanvas as glcanvas
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *

class SimpleCanvas(glcanvas.GLCanvas):
    def __init__(self, parent):
        glcanvas.GLCanvas.__init__(self, parent, -1)
        self.init = False
        self.context = glcanvas.GLContext(self)
        self.SetBackgroundStyle(wx.BG_STYLE_PAINT)
        self.Bind(wx.EVT_SIZE, self.OnSize)
        self.Bind(wx.EVT_PAINT, self.OnPaint)

    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()

class AxisDraw(SimpleCanvas):
    def InitGL(self):
        glEnable(GL_DEPTH_TEST)
        glEnable(GL_LIGHTING)
        glEnable(GL_LIGHT0)

    def OnDraw(self):

        glClearColor(1,1,1,1)
        glClear(GL_COLOR_BUFFER_BIT)
        gluLookAt(-0.1, 0.1, 0.0, 
                    0.0, 0.0, 0.4,
                    0.0, 0.1, 0)
        
        glBegin(GL_LINES)
        glVertex3f(-1.0, 0.0, 0.0)
        glVertex3f(1.0, 0.0, 0.0)
        glVertex3f(0.0, 1.0, 0.0)
        glVertex3f(0.0, -1.0, 0.0)
        glVertex3f(0.0, 0.0, -1.0)
        glVertex3f(0.0, 0.0, 1.0)
        glEnd()
        glFlush()

        self.SwapBuffers()

class SimpleOpengl(wx.App):
    def OnInit(self):
        frame = wx.Frame(None)
        frame.SetSize((800,600))
        canvas = AxisDraw(frame)
        frame.Show()
        return True
    

app = SimpleOpengl()
app.MainLoop()
</code>