PyOgre — wiki

#Written by: Josh Taylor (deficite) joshtaylor dot mail at gmail dot com
# and Gordon Allott
import pygame
from pygame.locals import *
import ogre.renderer.OGRE as ogre
from ctypes import *

class PyGameOGREApp:
    "Provides a base for an application using PyGame and PyOgre"
    def __init__(self, width=640, height=480, fullscreen=False):
        self._initPyGame()
        self._initPyOgre()
        self._createWindow(width, height, fullscreen)
        self._createViewport()
        self._loadResources("resources.cfg")
        self._createEntities()

    def _initPyGame(self):
        "Starts up PyGame"
        pygame.init()

    def _initPyOgre(self):
        "Instantiates the PyOgre root and sceneManager objects and initialises"
        self.root = ogre.Root("plugins.cfg")
        self.root.showConfigDialog()
        self.root.initialise(False)
        self.sceneManager = self.root.createSceneManager(ogre.ST_GENERIC, "Default SceneManager")


#self.root.getSceneManager(ogre.ST_GENERIC)

    def _createWindow(self, width, height, fullscreen):
        "Creates a PyGame window and sets PyOgre to render onto it"
        self.screen = pygame.display.set_mode((width,height))
        renderParameters = ogre.NameValuePairList()

        window = pygame.display.get_wm_info()['window']
        display = pygame.display.get_wm_info()['display']

        #prototype for PyCObject_AsVoidPtr
        pythonapi.PyCObject_AsVoidPtr.restype = c_void_p
        pythonapi.PyCObject_AsVoidPtr.argtypes = [py_object]

        #we use the python api to get the display structure that ogre wants
        display_address = pythonapi.PyCObject_AsVoidPtr(display)

        renderParameters['parentWindowHandle'] = str(display_address) + ':0:' + str(window)


        self.renderWindow = self.root.createRenderWindow('PyOgre through PyGame', width, height, \
                                                         fullscreen, renderParameters)
        self.renderWindow.active = True

    def _createViewport(self):
        "Creates the user's viewport and camera"
        self.camera = self.sceneManager.createCamera("camera")
        self.camera.position = (0, 0, 500)
        self.camera.lookAt((0, 0, -300))
        self.camera.nearClipDistance = 5
        self.viewport = self.renderWindow.addViewport(self.camera)
        self.viewport.backgroundColour = (0, 0, 0)

    def _loadResources(self, rcfile):
        "Loads the resource paths from specified resource config file"
        cf = ogre.ConfigFile()
        cf.load("resources.cfg")

        seci = cf.getSectionIterator()
        while seci.hasMoreElements():
            secName = seci.peekNextKey()
            settings = seci.getNext()

            for item in settings:
                typeName = item.key
                archName = item.value
                ogre.ResourceGroupManager.getSingleton().addResourceLocation(archName, typeName, secName)


    def _createEntities(self):
        "For simple demo purposes this can be used to create entities and attach them to sceneNode's"
        self.entities = [self.sceneManager.createEntity("robot", "robot.mesh")]
        self.sceneNodes = [self.sceneManager.rootSceneNode.createChildSceneNode("robotNode")]
        for i in range(len(self.sceneNodes)):
            self.sceneNodes[i].attachObject(self.entities[i])

    def _createScene(self):
        "Prepare the scene. All logic should go here"
        pass

    def _presentScene(self):
        "Render the scene and anything else needed done at the time of presentation"
        self.root.renderOneFrame()

    def run(self):
        "Brings the application to life"
        while self._processEvents():
            self._createScene()
            self._presentScene()
        pygame.quit()

    def _processEvents(self):
        "Process events and take appropriate action"
        for event in pygame.event.get():
            if event.type is QUIT:
                return False
            elif event.type is KEYDOWN and event.key is K_ESCAPE:
                return False
        return True

# Instantiate and run!
app = PyGameOGREApp()
app.run()