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SNIPPET:射線查詢、固定terrain中相機高度

創(chuàng)建查詢器
mRaySceneQuery = mSceneMgr->createRayQuery(Ray());

銷毀查詢器
mSceneMgr->destroyQuery(mRaySceneQuery);

// The ray scene query pointer
2

Ogre::RaySceneQuery *mRaySceneQuery;
3

// Setup the scene query
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Ogre::Vector3 camPos = mCamera->getPosition();
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Ogre::Ray cameraRay(Ogre::Vector3(camPos.x, 5000.0f, camPos.z), Ogre::Vector3::NEGATIVE_UNIT_Y);
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mRaySceneQuery->setRay(cameraRay);
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// Perform the scene query
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Ogre::RaySceneQueryResult &result = mRaySceneQuery->execute();
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Ogre::RaySceneQueryResult::iterator itr = result.begin();
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// Get the results, set the camera height
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if (itr != result.end() && itr->worldFragment)
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{
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Ogre::Real terrainHeight = itr->worldFragment->singleIntersection.y;
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//if ((terrainHeight + 10.0f) > camPos.y)
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mCamera->setPosition( camPos.x, terrainHeight + 10.0f, camPos.z );
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}

posted on 2011-06-09 14:56 的筆記閱讀(222) 評論(0) 編輯收藏引用

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