參考地址：http://blog.csdn.net/flyingleo1981/article/details/39393821
// 畫線、布告板顯示中文if (!m_pSceneManager->hasMovableObject("RibbonTrail1", "RibbonTrail")){ Ogre::NameValuePairList params; params["numberOfChains"] = "1"; params["maxElements"] = "500"; Ogre::RibbonTrail* ribbonTrail = (Ogre::RibbonTrail*)m_pSceneManager ->createMovableObject("RibbonTrail1","RibbonTrail", ¶ms); ribbonTrail->setTrailLength(100); ribbonTrail->setInitialColour(0, Ogre::ColourValue(128, 0, 255)); ribbonTrail->setColourChange(0, Ogre::ColourValue(0, 0, 0)); ribbonTrail->setInitialWidth(0, 0.2); m_pSceneManager->getRootSceneNode()->attachObject(ribbonTrail); Ogre::SceneNode* nodeTemp = m_pSceneManager->getRootSceneNode() ->createChildSceneNode("line"); nodeTemp->setPosition(m_pCurrentObject->getPosition()); ribbonTrail->addNode(nodeTemp); Ogre::Vector3 vt = nodeTemp->getPosition(); nodeTemp->setPosition(vt.x-10, vt.y+10, vt.z); // 顯示中文 Ogre::ColourValue textColor = Ogre::ColourValue(0.5f, 0.0f, 1.0f); Ogre::DisplayString str = Ogre::DisplayString(L"食人魔"); Ogre::MovableText* mt = new Ogre::MovableText("TXT_001", str, "SdkTrays/Caption", 1, textColor); mt->showOnTop(true); mt->setTextAlignment( Ogre::MovableText::HorizontalAlignment::H_CENTER, Ogre::MovableText::VerticalAlignment::V_ABOVE); nodeTemp->attachObject(mt);}// 移動模型跟隨軌跡if (!m_pSceneManager->hasMovableObject("RibbonTrail2", "RibbonTrail")){ Ogre::NameValuePairList params2; params2["numberOfChains"] = "2"; params2["maxElements"] = "500"; Ogre::RibbonTrail* ribbonTrail2 = (Ogre::RibbonTrail*)m_pSceneManager-> createMovableObject("RibbonTrail2","RibbonTrail", ¶ms2); ribbonTrail2->setTrailLength(100); ribbonTrail2->setInitialColour(0, Ogre::ColourValue(128, 0, 255)); ribbonTrail2->setColourChange(0, Ogre::ColourValue(0, 0, 0)); ribbonTrail2->setInitialWidth(0, 0.3); ribbonTrail2->setWidthChange(0, 1); m_pSceneManager->getRootSceneNode()->attachObject(ribbonTrail2); ribbonTrail2->addNode(m_pCurrentObject);}布告板顯示中文類：
/* * .h 文件 */#ifndef __MovableText_H__#define __MovableText_H__#include <Ogre.h>#include "OGRE/Overlay/OgreFont.h"#include <OGRE/Overlay/OgreFontManager.h>#include <OGRE/Overlay/OgreOverlayElement.h>namespace Ogre{ class MovableText : public MovableObject, public Renderable { public: /// 水平對齊方式 enum HorizontalAlignment { H_LEFT, ///< 左對齊 H_CENTER, ///< 居中 H_RIGHT ///< 右對齊 }; /// 垂直對齊方式 enum VerticalAlignment { V_BELOW,///< 低端對齊 V_ABOVE,///< 頂端對齊 V_CENTER///< 居中 }; PRotected: String mFontName; String mType; String mName; DisplayString mCaption; HorizontalAlignment mHorizontalAlignment; ///< 水平對齊方式 VerticalAlignment mVerticalAlignment; ///< 垂直對齊方式 ColourValue mColor; RenderOperation mRenderOp; AxisAlignedBox mAABB; LightList mLList; Real mCharHeight; Real mSpaceWidth; bool mNeedUpdate; bool mUpdateColors; bool mOnTop; Real mTimeUntilNextToggle; Real mRadius; ///< 包圍半徑 Real mAdditionalHeight; Camera* mpCam; ///< 攝像機指針 RenderWindow* mpWin; ///< 渲染窗口指針 FontPtr mpFont; ///< 字體指針 MaterialPtr mpMaterial; MaterialPtr mpBackgroundMaterial; ///< 背景材質 Vector3 mPositionOffset; Vector3 mScaleOffset; public: /// 構造函數 /// @param[in] name 標識名 /// @param[in] caption 字幕字符串 /// @param[in] fontName 字體名 /// @param[in] charHeight 字符高度 /// @param[in] colour 字符顏色 MovableText(const Ogre::String& name, const Ogre::DisplayString& caption, const Ogre::String& fontName = "BlueHighway", Ogre::Real charHeight = 1.0f, const Ogre::ColourValue& colour = Ogre::ColourValue::White); virtual ~MovableText(void); virtual void visitRenderables( Ogre::Renderable::Visitor* visitor, bool debugRenderables = false); /// 設置字體名 void setFontName(const String &fontName); /// 設置顯示字幕 void setCaption(const DisplayString &caption); /// 設置文字顏色 void setColor(const ColourValue &color); /// 設置文字高度 void setCharacterHeight(Real height); /// 設置間隔寬度 void setSpaceWidth(Real width); /// 設置文字對齊方式 void setTextAlignment(const HorizontalAlignment& horizontalAlignment, const VerticalAlignment& verticalAlignment); /// 設置 void setAdditionalHeight( Real height ); /// 是否最前方顯示 void showOnTop(bool show=true); /// void setPositionOffset(const Ogre::Vector3& offset); /// Ogre::Vector3 getPositionOffset() const { return mPositionOffset; } /// void setScaleOffset(const Ogre::Vector3& offset); /// Ogre::Vector3 getScaleOffset() const { return mScaleOffset; } /// 獲取字體名 const String& getFontName() const {return mFontName;} /// 獲取字幕字符串 const DisplayString& getCaption() const {return mCaption;} /// 獲取字體顏色 const ColourValue& getColor() const {return mColor;} /// 獲取字符高度 Real getCharacterHeight() const {return mCharHeight;} /// 獲取間隔寬度 Real getSpaceWidth() const {return mSpaceWidth;} /// Real getAdditionalHeight() const {return mAdditionalHeight;} /// 獲取是否在最前方顯示 bool getShowOnTop() const {return mOnTop;} /// 獲取包圍盒 AxisAlignedBox GetAABB(void) { return mAABB; } /// 獲取包圍半徑 Real getBoundingRadius(void) const {return mRadius;}; protected: // from MovableText, create the object void _setupGeometry(); void _updateColors(); /// 獲取世界坐標系中的變換 void getWorldTransforms(Matrix4 *xform) const; /// 獲取攝像機的視深 Real getSquaredViewDepth(const Camera *cam) const {return 0;}; /// 獲取世界坐標系中的朝向 /// @note 一直面朝攝像機 const Quaternion& getWorldOrientation(void) const; /// 獲取在世界坐標系中的坐標 const Vector3& getWorldPosition(void) const; /// 獲取包圍盒 const AxisAlignedBox& getBoundingBox(void) const {return mAABB;}; /// 獲取標識名 const String& getName(void) const {return mName;}; /// 獲取類型名 const String& getMovableType(void) const {static Ogre::String movType = "MovableText"; return movType;}; void _notifyCurrentCamera(Camera *cam); void _updateRenderQueue(RenderQueue* queue); // from renderable void getRenderOperation(RenderOperation &op); const MaterialPtr& getMaterial(void) const {assert(!mpMaterial.isNull());return mpMaterial;}; const LightList& getLights(void) const {return mLList;}; };}#endif/* * .cpp 文件 */#include "OgreMovableText.h"using namespace Ogre;#define POS_TEX_BINDING 0#define COLOUR_BINDING 1#define UNICODE_NEL 0x0085 ///< next line#define UNICODE_CR 0x000D ///< carriage return#define UNICODE_LF 0x000A ///< line feed#define UNICODE_SPACE 0x0020 ///< space#define UNICODE_ZERO 0x0030 ///< 0MovableText::MovableText(const String &name, const DisplayString &caption, const String &fontName, Real charHeight, const ColourValue &color) : mpCam(NULL) , mpWin(NULL) , mpFont(NULL) , mName(name) , mCaption(caption) , mFontName(fontName) , mCharHeight(charHeight) , mColor(color) , mType("MovableText") , mTimeUntilNextToggle(0) , mSpaceWidth(0) , mUpdateColors(true) , mOnTop(false) , mHorizontalAlignment(H_LEFT) , mVerticalAlignment(V_BELOW) , mAdditionalHeight(0.0) , mPositionOffset(Vector3::ZERO) , mScaleOffset(Vector3::UNIT_SCALE){ if (name == StringUtil::BLANK ) throw Exception(Exception::ERR_INVALIDPARAMS, "Trying to create MovableText without name", "MovableText::MovableText"); if (caption == StringUtil::BLANK ) throw Exception(Exception::ERR_INVALIDPARAMS, "Trying to create MovableText without caption", "MovableText::MovableText"); mRenderOp.vertexData = NULL; this->setFontName(mFontName); this->_setupGeometry();}MovableText::~MovableText(){ if (mRenderOp.vertexData) delete mRenderOp.vertexData;}void MovableText::setFontName(const String &fontName){ if((Ogre::MaterialManager::getSingletonPtr()->resourceExists(mName + "Material"))) { Ogre::MaterialManager::getSingleton().remove(mName + "Material"); } if (mFontName != fontName || mpMaterial.isNull() || mpFont.isNull()) { mFontName = fontName; mpFont = FontManager::getSingleton().getByName(mFontName); if (mpFont.isNull()) throw Exception(Exception::ERR_ITEM_NOT_FOUND, "Could not find font " + fontName, "MovableText::setFontName"); mpFont->load(); if (!mpMaterial.isNull()) { MaterialManager::getSingletonPtr()->remove(mpMaterial->getName()); mpMaterial.setNull(); } mpMaterial = mpFont->getMaterial()->clone(mName + "Material"); if (!mpMaterial->isLoaded()) mpMaterial->load(); mpMaterial->getTechnique(0)->getPass(0)->setSceneBlending( Ogre::SBT_TRANSPARENT_ALPHA );//設置渲染通道和現有的渲染層內容混合方式 mpMaterial->getTechnique(0)->getPass(0)->setAmbient(0.5,0.0,0.0); mpMaterial->getTechnique(0)->getPass(0)->setSpecular(0.6612,0.6612,0.6612,0.5); //Ogre::ColourValue curColorValue = mpMaterial->getTechnique(0)->getPass(0)->getDiffuse(); mpMaterial->getTechnique(0)->getPass(0)->setDiffuse(0.5, 0.5, 0.5, 0);//設置透明度 //mpMaterial->getTechnique(0)->getPass(0)->getTextureUnitState(0)->setAlphaOperation(Ogre::LBX_MODULATE, Ogre::LBS_TEXTURE, Ogre::LBS_MANUAL, 1.0, 1 ); mpMaterial->getTechnique(0)->getPass(0)->setDepthCheckEnabled(true); mpMaterial->getTechnique(0)->getPass(0)->setDepthWriteEnabled(false); mpMaterial->setLightingEnabled(false);// mpMaterial->setDepthCheckEnabled(!mOnTop);//#if 1// mpMaterial->setDepthBias(1.0,1.0);//#else// mpMaterial->setDepthBias(1.0f);//#endif// mpMaterial->setDepthWriteEnabled(mOnTop);// //// mpMaterial->setLightingEnabled(false);// //// Ogre::Pass* pass=mpMaterial->getTechnique(0)->createPass();// pass->setSceneBlending(Ogre::SceneBlendType::SBT_TRANSPARENT_ALPHA);// pass->setAmbient(0.8,0.8,0.8);//// pass->setDiffuse(0.5,0.5,0.5,1.0);// pass->setSpecular(0.6612,0.6612,0.6612,0.5);// // //pass->setEmissive(0,0,0);// //pass->setDepthCheckEnabled(true);// // pass->setSceneBlending( Ogre::SBT_TRANSPARENT_ALPHA );//設置渲染通道和現有的渲染層內容混合方式// // pass->setAmbient(0.0,0.0,0.0);// //pass->setDiffuse(0.0,0.0,0.0,0.0);// //pass->setSpecular(0.6612,0.6612,0.6612,10);// // pass->setEmissive(0,0,0);// //pass->setSceneBlending( Ogre::SBT_ADD );// //pass->getTextureUnitState(0)->setAlphaOperation(Ogre::LBX_MODULATE, Ogre::LBS_TEXTURE, Ogre::LBS_MANUAL, 1.0, 0.1 );// /*Ogre::TextureUnitState *tex=pass->createTextureUnitState("flare.png");// tex->setName("HighLight");// tex->setColourOperationEx(Ogre::LayerBlendOperationEx::LBX_ADD);// tex->setColourOpMultipassFallback(Ogre::SceneBlendFactor::SBF_ONE,Ogre::SceneBlendFactor::SBF_ONE);// tex->setEnvironmentMap(true);*/ //unsigned short i=mpMaterial->getTechnique(0)->getPass(0)->getIndex(); //mpMaterial->getTechnique(0)->movePass(i,0); // mNeedUpdate = true; }}void MovableText::setCaption(const DisplayString &caption){ if (caption != mCaption) { mCaption = caption; mNeedUpdate = true; }}void MovableText::visitRenderables(Ogre::Renderable::Visitor* visitor, bool debugRenderables){}void MovableText::setColor(const ColourValue &color){ if (color != mColor) { mColor = color; mUpdateColors = true; }}void MovableText::setCharacterHeight(Real height){ if (height != mCharHeight) { mCharHeight = height; mSpaceWidth = 0; mNeedUpdate = true; }}void MovableText::setSpaceWidth(Real width){ if (width != mSpaceWidth) { mSpaceWidth = width; mNeedUpdate = true; }}void MovableText::setTextAlignment(const HorizontalAlignment& horizontalAlignment, const VerticalAlignment& verticalAlignment){ if(mHorizontalAlignment != horizontalAlignment) { mHorizontalAlignment = horizontalAlignment; mNeedUpdate = true; } if(mVerticalAlignment != verticalAlignment) { mVerticalAlignment = verticalAlignment; mNeedUpdate = true; }}void MovableText::setAdditionalHeight( Real height ){ if( mAdditionalHeight != height ) { mAdditionalHeight = height; mNeedUpdate = true; }}void MovableText::showOnTop(bool show){ if( mOnTop != show && !mpMaterial.isNull() ) { mOnTop = show;#if 1 mpMaterial->setDepthBias(1.0f, 1.0f);#else mpMaterial->setDepthBias(1.0f);#endif mpMaterial->setDepthCheckEnabled(!mOnTop); mpMaterial->setDepthWriteEnabled(mOnTop); }}void MovableText::_setupGeometry(){ if (mpFont.isNull()) { return; } if (mpMaterial.isNull()) { return; } size_t charlen = mCaption.size(); size_t vertexCount = charlen * 6; if (mRenderOp.vertexData) { // Removed this test as it causes problems when replacing a caption // of the same size: replacing "Hello" with "hello" // as well as when changing the text alignment //if (mRenderOp.vertexData->vertexCount != vertexCount) { delete mRenderOp.vertexData; mRenderOp.vertexData = NULL; mUpdateColors = true; } } if (!mRenderOp.vertexData) mRenderOp.vertexData = new VertexData(); mRenderOp.indexData = 0; mRenderOp.vertexData->vertexStart = 0; mRenderOp.vertexData->vertexCount = vertexCount; mRenderOp.operationType = RenderOperation::OT_TRIANGLE_LIST; mRenderOp.useIndexes = false; VertexDeclaration *decl = mRenderOp.vertexData->vertexDeclaration; VertexBufferBinding *bind = mRenderOp.vertexData->vertexBufferBinding; size_t offset = 0; // create/bind positions/tex.ccord. buffer if (!decl->findElementBySemantic(VES_POSITION)) decl->addElement(POS_TEX_BINDING, offset, VET_FLOAT3, VES_POSITION); offset += VertexElement::getTypeSize(VET_FLOAT3); if (!decl->findElementBySemantic(VES_TEXTURE_COORDINATES)) decl->addElement(POS_TEX_BINDING, offset, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES, 0); HardwareVertexBufferSharedPtr ptbuf = HardwareBufferManager::getSingleton().createVertexBuffer(decl->getVertexSize(POS_TEX_BINDING), mRenderOp.vertexData->vertexCount, HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY); bind->setBinding(POS_TEX_BINDING, ptbuf); // Colours - store these in a separate buffer because they change less often if (!decl->findElementBySemantic(VES_DIFFUSE)) decl->addElement(COLOUR_BINDING, 0, VET_COLOUR, VES_DIFFUSE); HardwareVertexBufferSharedPtr cbuf = HardwareBufferManager::getSingleton().createVertexBuffer(decl->getVertexSize(COLOUR_BINDING), mRenderOp.vertexData->vertexCount, HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY); bind->setBinding(COLOUR_BINDING, cbuf); float *pPCBuff = static_cast<float*>(ptbuf->lock(HardwareBuffer::HBL_DISCARD)); float largestWidth = 0; float left = 0 * 2.0 - 1.0; float top = -((0 * 2.0) - 1.0); // Derive space width from a capital A if (mSpaceWidth == 0) mSpaceWidth = mpFont->getGlyphaspectRatio('A') * mCharHeight * 2.0; // for calculation of AABB Ogre::Vector3 min, max, currPos; Ogre::Real maxSquaredRadius = 0; bool first = true; // Use iterator DisplayString::iterator i, iend; iend = mCaption.end(); bool newLine = true; Real len = 0.0f; Real verticalOffset = 0; switch (mVerticalAlignment) { case MovableText::V_ABOVE: verticalOffset = mCharHeight; break; case MovableText::V_CENTER: verticalOffset = 0.5*mCharHeight; break; case MovableText::V_BELOW: verticalOffset = 0; break; } // Raise the first line of the caption top += verticalOffset; for (i = mCaption.begin(); i != iend; ++i) { Font::CodePoint character = OGRE_DEREF_DISPLAYSTRING_ITERATOR(i); if (character == UNICODE_CR || character == UNICODE_NEL || character == UNICODE_LF) { top += verticalOffset * 2.0f; } } for (i = mCaption.begin(); i != iend; ++i) { Font::CodePoint character = OGRE_DEREF_DISPLAYSTRING_ITERATOR(i); if (newLine) { len = 0.0f; for (DisplayString::iterator j = i; j != iend; j++) { Font::CodePoint cr = OGRE_DEREF_DISPLAYSTRING_ITERATOR(j); if (cr == UNICODE_CR || cr == UNICODE_NEL || cr == UNICODE_LF) { break; } else if (cr == UNICODE_SPACE) // space { len += mSpaceWidth; } else { len += mpFont->getGlyphAspectRatio(character) * mCharHeight * 2.0f; } } newLine = false; } if (character == UNICODE_CR || character == UNICODE_NEL || character == UNICODE_LF) { left = 0 * 2.0 - 1.0; top -= mCharHeight * 2.0; newLine = true; continue; } if (character == UNICODE_SPACE) { // Just leave a gap, no tris left += mSpaceWidth; // Also reduce tri count mRenderOp.vertexData->vertexCount -= 6; continue; } Real horiz_height = mpFont->getGlyphAspectRatio(*i); Real u1, u2, v1, v2; Ogre::Font::UVRect utmp; utmp = mpFont->getGlyphTexCoords(character); u1 = utmp.left; u2 = utmp.right; v1 = utmp.top; v2 = utmp.bottom; // each vert is (x, y, z, u, v) //------------------------------------------------------------------------------------- // First tri // // Upper left if(mHorizontalAlignment == MovableText::H_LEFT) *pPCBuff++ = left; else *pPCBuff++ = left - (len / 2); *pPCBuff++ = top; *pPCBuff++ = -1.0; *pPCBuff++ = u1; *pPCBuff++ = v1; // Deal with bounds if(mHorizontalAlignment == MovableText::H_LEFT) currPos = Ogre::Vector3(left, top, -1.0); else currPos = Ogre::Vector3(left - (len / 2), top, -1.0); if (first) { min = max = currPos; maxSquaredRadius = currPos.squaredLength(); first = false; } else { min.makeFloor(currPos); max.makeCeil(currPos); maxSquaredRadius = std::max(maxSquaredRadius, currPos.squaredLength()); } top -= mCharHeight * 2.0; // Bottom left if(mHorizontalAlignment == MovableText::H_LEFT) *pPCBuff++ = left; else *pPCBuff++ = left - (len / 2); *pPCBuff++ = top; *pPCBuff++ = -1.0; *pPCBuff++ = u1; *pPCBuff++ = v2; // Deal with bounds if(mHorizontalAlignment == MovableText::H_LEFT) currPos = Ogre::Vector3(left, top, -1.0); else currPos = Ogre::Vector3(left - (len / 2), top, -1.0); min.makeFloor(currPos); max.makeCeil(currPos); maxSquaredRadius = std::max(maxSquaredRadius, currPos.squaredLength()); top += mCharHeight * 2.0; left += horiz_height * mCharHeight * 2.0; // Top right if(mHorizontalAlignment == MovableText::H_LEFT) *pPCBuff++ = left; else *pPCBuff++ = left - (len / 2); *pPCBuff++ = top; *pPCBuff++ = -1.0; *pPCBuff++ = u2; *pPCBuff++ = v1; //------------------------------------------------------------------------------------- // Deal with bounds if(mHorizontalAlignment == MovableText::H_LEFT) currPos = Ogre::Vector3(left, top, -1.0); else currPos = Ogre::Vector3(left - (len / 2), top, -1.0); min.makeFloor(currPos); max.makeCeil(currPos); maxSquaredRadius = std::max(maxSquaredRadius, currPos.squaredLength()); //------------------------------------------------------------------------------------- // Second tri // // Top right (again) if(mHorizontalAlignment == MovableText::H_LEFT) *pPCBuff++ = left; else *pPCBuff++ = left - (len / 2); *pPCBuff++ = top; *pPCBuff++ = -1.0; *pPCBuff++ = u2; *pPCBuff++ = v1; currPos = Ogre::Vector3(left, top, -1.0); min.makeFloor(currPos); max.makeCeil(currPos); maxSquaredRadius = std::max(maxSquaredRadius, currPos.squaredLength()); top -= mCharHeight * 2.0; left -= horiz_height * mCharHeight * 2.0; // Bottom left (again) if(mHorizontalAlignment == MovableText::H_LEFT) *pPCBuff++ = left; else *pPCBuff++ = left - (len / 2); *pPCBuff++ = top; *pPCBuff++ = -1.0; *pPCBuff++ = u1; *pPCBuff++ = v2; currPos = Ogre::Vector3(left, top, -1.0); min.makeFloor(currPos); max.makeCeil(currPos); maxSquaredRadius = std::max(maxSquaredRadius, currPos.squaredLength()); left += horiz_height * mCharHeight * 2.0; // Bottom right if(mHorizontalAlignment == MovableText::H_LEFT) *pPCBuff++ = left; else *pPCBuff++ = left - (len / 2); *pPCBuff++ = top; *pPCBuff++ = -1.0; *pPCBuff++ = u2; *pPCBuff++ = v2; //------------------------------------------------------------------------------------- currPos = Ogre::Vector3(left, top, -1.0); min.makeFloor(currPos); max.makeCeil(currPos); maxSquaredRadius = std::max(maxSquaredRadius, currPos.squaredLength()); // Go back up with top top += mCharHeight * 2.0; float currentWidth = (left + 1)/2 - 0; if (currentWidth > largestWidth) largestWidth = currentWidth; } // Unlock vertex buffer ptbuf->unlock(); min.makeFloor(max); //When only spaces are typed in min can exceed max, this rectifies this // update AABB/Sphere radius mAABB = Ogre::AxisAlignedBox(min, max); mRadius = Ogre::Math::Sqrt(maxSquaredRadius); if (mUpdateColors) this->_updateColors(); mNeedUpdate = false;}void MovableText::_updateColors(void){ assert(!mpFont.isNull()); assert(!mpMaterial.isNull()); if (mpFont.isNull()) { return; } if (mpMaterial.isNull()) { return; } // Convert to system-specific RGBA color; Root::getSingleton().convertColourValue(mColor, &color); HardwareVertexBufferSharedPtr vbuf = mRenderOp.vertexData->vertexBufferBinding->getBuffer(COLOUR_BINDING); RGBA *pDest = static_cast<RGBA*>(vbuf->lock(HardwareBuffer::HBL_DISCARD)); for (uint i = 0; i < mRenderOp.vertexData->vertexCount; ++i) *pDest++ = color; vbuf->unlock(); mUpdateColors = false;}const Quaternion& MovableText::getWorldOrientation(void) const{ assert(mpCam); return const_cast<Quaternion&>(mpCam->getDerivedOrientation());}const Vector3& MovableText::getWorldPosition(void) const{ assert(mParentNode); return mParentNode->_getDerivedPosition();}void MovableText::getWorldTransforms(Matrix4 *xform) const { if (this->isVisible() && mpCam) { Matrix3 rot3x3, scale3x3 = Matrix3::IDENTITY; // store rotation in a matrix mpCam->getDerivedOrientation().ToRotationMatrix(rot3x3); // parent node position Vector3 ppos = mParentNode->_getDerivedPosition() + Vector3::UNIT_Y*mAdditionalHeight; Quaternion pori = mParentNode->_getDerivedOrientation(); Vector3 alignmentOffset = Vector3::ZERO; //ppos += pori * (mPositionOffset + alignmentOffset * 0.01); // apply scale scale3x3[0][0] = mParentNode->_getDerivedScale().x / 2; scale3x3[1][1] = mParentNode->_getDerivedScale().y / 2; scale3x3[2][2] = mParentNode->_getDerivedScale().z / 2; // apply all transforms to xform *xform = (rot3x3 * scale3x3); xform->setTrans(ppos); }}void MovableText::getRenderOperation(RenderOperation &op){ if (this->isVisible()) { if (mNeedUpdate) this->_setupGeometry(); if (mUpdateColors) this->_updateColors(); op = mRenderOp; }}void MovableText::_notifyCurrentCamera(Camera *cam){ mpCam = cam;}void MovableText::_updateRenderQueue(RenderQueue* queue){ if (this->isVisible()) { if (mNeedUpdate) this->_setupGeometry(); if (mUpdateColors) this->_updateColors(); queue->addRenderable(this, mRenderQueueID, OGRE_RENDERABLE_DEFAULT_PRIORITY); }}void Ogre::MovableText::setPositionOffset( const Ogre::Vector3& offset ){ mPositionOffset = offset;}void Ogre::MovableText::setScaleOffset( const Ogre::Vector3& offset ){ mScaleOffset = offset;}效果圖： 
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