??????????????

ogre_tom

??????????????????3DMax????????????????????Z??????????0.0, 0, 160.0????0.0, 0, 0.0????????????????????????0.0, 0, 160.0????????Z?????????????0, 0, 0??????????????????????????????????
??????????????Line3D????http://www.ogre3d.org/wiki/index.php/Line3D?
void XDemoApp::createScene(void)
{
        mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow,
                Ogre::RENDER_QUEUE_OVERLAY, false, 3000, mSceneMgr);
        mGUISystem = new CEGUI::System(mGUIRenderer);
        CEGUI:ogger::getSingleton().setLoggingLevel(CEGUI::Informative);

        CEGUI::SchemeManager::getSingleton().loadScheme(
                (CEGUI::utf8*)"TaharezLookSkin.scheme");
        mGUISystem->setDefaultMouseCursor(
                (CEGUI::utf8*)"TaharezLook", (CEGUI::utf8*)"MouseArrow");
        mGUISystem->setDefaultFont((CEGUI::utf8*)"BlueHighway-12");
        CEGUI::MouseCursor::getSingleton().setImage("TaharezLook", "MouseArrow");
        CEGUI::MouseCursor::getSingleton().show( );
        setupEventHandlers();
        // ??????
        mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
        Entity *ent = mSceneMgr->createEntity("Wall", "wall.mesh");
        SceneNode *node = mSceneMgr->getRootSceneNode()->createChildSceneNode("WallNode");
        node->attachObject(ent);
        // ????
        Line3D *myLine = new Line3D();
        myLine->addPoint(Vector3(0.0, 0, 160.0));
        myLine->addPoint(Vector3(0.0, 0, 0.0));
        myLine->drawLines();
        SceneNode *myNode = mSceneMgr->getRootSceneNode()->createChildSceneNode();
        myNode->attachObject(myLine);
        // ???????
        mCamera->setPosition(Vector3(0, 20, 200));
        mCamera->lookAt(Vector3(0, 0, 0));
        // Overlay
        overlay = OverlayManager::getSingleton().getByName("Example1/VolTexOverlay");   
        overlay->show();

        Vector3 intersectPoint;
        // ??????(0.0, 0, 160.0)????????Z??????
        RaySceneQuery* raySceneQuery = mSceneMgr->createRayQuery(Ray(Vector3(0.0, 0, 160.0), Vector3::NEGATIVE_UNIT_Z));
        raySceneQuery->setSortByDistance(true);
        RaySceneQueryResult& qryResult = raySceneQuery->execute();

        RaySceneQueryResult::iterator it;
        it = qryResult.begin();
        // ??????Overlay??????
        if(it != qryResult.end() && it->worldFragment)
        {
                intersectPoint = it->worldFragment->singleIntersection;
                OverlayManager::getSingleton().getOverlayElement("Example1/Info/Para1")->setCaption(StringConverter::toString(intersectPoint));
        }
        // ????Overlay???????????Size
        else
        {
                OverlayManager::getSingleton().getOverlayElement("Example1/Info/Para1")->setCaption(StringConverter::toString(qryResult.size()));
        }
}
??????????

hanckjt

worldFragment??Terrain???????Entity??????movable????distance???Ray????????????????????????????????SubEntity????????????????OpCode + OgreOpCode?

ogre_tom

?????