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OgreRectangle2D.cpp

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00001 /*
00002 -----------------------------------------------------------------------------
00003 This source file is part of OGRE
00004 (Object-oriented Graphics Rendering Engine)
00005 For the latest info, see http://www.ogre3d.org/
00006 
00007 Copyright © 2000-2002 The OGRE Team
00008 Also see acknowledgements in Readme.html
00009 
00010 This program is free software; you can redistribute it and/or modify it under
00011 the terms of the GNU Lesser General Public License as published by the Free Software
00012 Foundation; either version 2 of the License, or (at your option) any later
00013 version.
00014 
00015 This program is distributed in the hope that it will be useful, but WITHOUT
00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
00018 
00019 You should have received a copy of the GNU Lesser General Public License along with
00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to
00022 http://www.gnu.org/copyleft/lesser.txt.
00023 -----------------------------------------------------------------------------
00024 */
00025 #include "OgreStableHeaders.h"
00026 #include "OgreRectangle2D.h"
00027 
00028 #include "OgreSimpleRenderable.h"
00029 #include "OgreHardwareBufferManager.h"
00030 #include "OgreCamera.h"
00031 
00032 namespace Ogre {
00033 #define POSITION_BINDING 0
00034 #define TEXCOORD_BINDING 1
00035 
00036     Rectangle2D::Rectangle2D(bool includeTextureCoords) 
00037     {
00038         mRenderOp.vertexData = new VertexData();
00039 
00040         mRenderOp.indexData = 0;
00041         mRenderOp.vertexData->vertexCount = 4; 
00042         mRenderOp.vertexData->vertexStart = 0; 
00043         mRenderOp.operationType = RenderOperation::OT_TRIANGLE_STRIP; 
00044         mRenderOp.useIndexes = false; 
00045 
00046         VertexDeclaration* decl = mRenderOp.vertexData->vertexDeclaration;
00047         VertexBufferBinding* bind = mRenderOp.vertexData->vertexBufferBinding;
00048 
00049         decl->addElement(POSITION_BINDING, 0, VET_FLOAT3, VES_POSITION);
00050 
00051 
00052         HardwareVertexBufferSharedPtr vbuf = 
00053             HardwareBufferManager::getSingleton().createVertexBuffer(
00054             decl->getVertexSize(POSITION_BINDING),
00055             mRenderOp.vertexData->vertexCount,
00056             HardwareBuffer::HBU_STATIC_WRITE_ONLY);
00057 
00058         // Bind buffer
00059         bind->setBinding(POSITION_BINDING, vbuf);
00060 
00061         if (includeTextureCoords)
00062         {
00063             decl->addElement(TEXCOORD_BINDING, 0, VET_FLOAT2, VES_TEXTURE_COORDINATES);
00064 
00065 
00066             HardwareVertexBufferSharedPtr tvbuf = 
00067                 HardwareBufferManager::getSingleton().createVertexBuffer(
00068                 decl->getVertexSize(TEXCOORD_BINDING),
00069                 mRenderOp.vertexData->vertexCount,
00070                 HardwareBuffer::HBU_STATIC_WRITE_ONLY);
00071 
00072             // Bind buffer
00073             bind->setBinding(TEXCOORD_BINDING, tvbuf);
00074 
00075             // Set up basic tex coordinates
00076             Real* pTex = static_cast<Real*>(
00077                 tvbuf->lock(HardwareBuffer::HBL_DISCARD));
00078             *pTex++ = 0.0f;
00079             *pTex++ = 0.0f;
00080             *pTex++ = 0.0f;
00081             *pTex++ = 1.0f;
00082             *pTex++ = 1.0f;
00083             *pTex++ = 0.0f;
00084             *pTex++ = 1.0f;
00085             *pTex++ = 1.0f;
00086             tvbuf->unlock();
00087         }
00088 
00089         // set basic white material
00090         this->setMaterial("BaseWhiteNoLighting");
00091 
00092 
00093 
00094     }
00095 
00096     Rectangle2D::~Rectangle2D() 
00097     {
00098         delete mRenderOp.vertexData;
00099     }
00100 
00101     void Rectangle2D::setCorners(Real left, Real top, Real right, Real bottom) 
00102     {
00103         HardwareVertexBufferSharedPtr vbuf = 
00104             mRenderOp.vertexData->vertexBufferBinding->getBuffer(POSITION_BINDING);
00105         Real* pReal = static_cast<Real*>(vbuf->lock(HardwareBuffer::HBL_DISCARD));
00106 
00107         *pReal++ = left;
00108         *pReal++ = top;
00109         *pReal++ = -1;
00110 
00111         *pReal++ = left;
00112         *pReal++ = bottom;
00113         *pReal++ = -1;
00114 
00115         *pReal++ = top;
00116         *pReal++ = right;
00117         *pReal++ = -1;
00118 
00119         *pReal++ = right;
00120         *pReal++ = bottom;
00121         *pReal++ = -1;
00122 
00123         vbuf->unlock();
00124 
00125         AxisAlignedBox aabb;
00126         aabb.setExtents(left, top, 0, right, bottom, 0);
00127 
00128     }
00129 
00130     // Override this method to prevent parent transforms (rotation,translation,scale)
00131     void Rectangle2D::getWorldTransforms( Matrix4* xform ) const
00132     {
00133         // return identity matrix to prevent parent transforms
00134         *xform = Matrix4::IDENTITY;
00135     }
00136     //-----------------------------------------------------------------------
00137     const Quaternion& Rectangle2D::getWorldOrientation(void) const
00138     {
00139         return Quaternion::IDENTITY;
00140     }
00141     //-----------------------------------------------------------------------
00142     const Vector3& Rectangle2D::getWorldPosition(void) const
00143     {
00144         return Vector3::ZERO;
00145     }
00146 
00147 
00148 }
00149 

Copyright © 2002-2003 by The OGRE Team
Last modified Fri May 14 23:22:37 2004