转载请注明出处!Pulas
http://www.cnblogs.com/pulas/archive/2012/02/16/2354542.html
首先自定义一个场景管理器的监听器.
头文件:
#ifndef __CustomSceneManagerListener_H__ #define __CustomSceneManagerListener_H__ #include <Ogre.h> class CCustomSceneManagerListener : public Ogre::SceneManager::Listener { public: CCustomSceneManagerListener(); ~CCustomSceneManagerListener(); public: /** Called prior to searching for visible objects in this SceneManager. @remarks Note that the render queue at this stage will be full of the last render's contents and will be cleared after this method is called. @param source The SceneManager instance raising this event. @param irs The stage of illumination being dealt with. IRS_NONE for a regular render, IRS_RENDER_TO_TEXTURE for a shadow caster render. @param v The viewport being updated. You can get the camera from here. */ virtual void preFindVisibleObjects(Ogre::SceneManager* source, Ogre::SceneManager::IlluminationRenderStage irs, Ogre::Viewport* v); public: /** Sets the user clipping region. */ virtual void setClipPlanes(const Ogre::PlaneList& clipPlanes); /** Add a user clipping plane. */ virtual void addClipPlane (const Ogre::Plane &p); /** Add a user clipping plane. */ virtual void addClipPlane (Ogre::Real A, Ogre::Real B, Ogre::Real C, Ogre::Real D); /** Clears the user clipping region. */ virtual void resetClipPlanes(); void enableClipPlane(bool bEnable); bool isClipPlaneEnabled(); protected: // Recording user clip planes Ogre::PlaneList m_ClipPlanes; bool m_bEnableClipPlane; }; #endif
实现文件:
#include "stdafx.h" #include "CustomSceneManagerListener.h" using namespace Ogre; CCustomSceneManagerListener::CCustomSceneManagerListener() : m_bEnableClipPlane(true) { } CCustomSceneManagerListener::~CCustomSceneManagerListener() { } void CCustomSceneManagerListener::preFindVisibleObjects(Ogre::SceneManager* source, Ogre::SceneManager::IlluminationRenderStage irs, Ogre::Viewport* v) { if (m_bEnableClipPlane) { Ogre::Root::getSingletonPtr()->getRenderSystem()->setClipPlanes(m_ClipPlanes); } } //--------------------------------------------------------------------- void CCustomSceneManagerListener::addClipPlane (const Plane &p) { m_ClipPlanes.push_back(p); } //--------------------------------------------------------------------- void CCustomSceneManagerListener::addClipPlane (Real A, Real B, Real C, Real D) { addClipPlane(Plane(A, B, C, D)); } //--------------------------------------------------------------------- void CCustomSceneManagerListener::setClipPlanes(const PlaneList& clipPlanes) { if (clipPlanes != m_ClipPlanes) { m_ClipPlanes = clipPlanes; } } //--------------------------------------------------------------------- void CCustomSceneManagerListener::resetClipPlanes() { if (!m_ClipPlanes.empty()) { m_ClipPlanes.clear(); } } void CCustomSceneManagerListener::enableClipPlane( bool bEnable ) { m_bEnableClipPlane = bEnable; } bool CCustomSceneManagerListener::isClipPlaneEnabled() { return m_bEnableClipPlane; }
在初始化完Ogre后,添加自定义裁剪面:
m_pCustomSceneManagerListener = new CCustomSceneManagerListener; mSceneMgr->addListener(m_pCustomSceneManagerListener); Ogre::Plane SectionClipPlane; SectionClipPlane.normal = Ogre::Vector3::NEGATIVE_UNIT_Y; SectionClipPlane.d = -4.9; m_pCustomSceneManagerListener->addClipPlane(SectionClipPlane);