# Visualization Library

A lightweight C++ OpenGL middleware for 2D/3D graphics

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# D:/VL/BuildSystem/VL_DISTRO/Visualization_Library_SDK/src/vlGraphics/DrawArrays.hpp

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    00001 /**************************************************************************************/
    00002 /*                                                                                    */
    00003 /*  Visualization Library                                                             */
    00004 /*  http://www.visualizationlibrary.org                                               */
    00005 /*                                                                                    */
    00006 /*  Copyright (c) 2005-2011, Michele Bosi                                             */
    00007 /*  All rights reserved.                                                              */
    00008 /*                                                                                    */
    00009 /*  Redistribution and use in source and binary forms, with or without modification,  */
    00010 /*  are permitted provided that the following conditions are met:                     */
    00011 /*                                                                                    */
    00012 /*  - Redistributions of source code must retain the above copyright notice, this     */
    00013 /*  list of conditions and the following disclaimer.                                  */
    00014 /*                                                                                    */
    00015 /*  - Redistributions in binary form must reproduce the above copyright notice, this  */
    00016 /*  list of conditions and the following disclaimer in the documentation and/or       */
    00017 /*  other materials provided with the distribution.                                   */
    00018 /*                                                                                    */
    00019 /*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND   */
    00020 /*  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED     */
    00021 /*  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE            */
    00022 /*  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR  */
    00023 /*  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES    */
    00024 /*  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;      */
    00025 /*  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON    */
    00026 /*  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT           */
    00027 /*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS     */
    00028 /*  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                      */
    00029 /*                                                                                    */
    00030 /**************************************************************************************/
    00031
    00032 #ifndef DrawArrays_INCLUDE_DEFINE
    00033 #define DrawArrays_INCLUDE_DEFINE
    00034
    00035 #include <vlGraphics/DrawCall.hpp>
    00036 #include <vlGraphics/TriangleIterator.hpp>
    00037
    00038 namespace vl
    00039 {
    00040   //------------------------------------------------------------------------------
    00041   // DrawArrays
    00042   //------------------------------------------------------------------------------
    00057   class DrawArrays: public DrawCall
    00058   {
    00059     VL_INSTRUMENT_CLASS(vl::DrawArrays, DrawCall)
    00060
    00061   public:
    00062     DrawArrays(): mStart(0), mCount(0)
    00063     {
    00064       VL_DEBUG_SET_OBJECT_NAME()
    00065       mType      = PT_TRIANGLES;
    00066       mInstances = 1;
    00067     }
    00068
    00069     DrawArrays(EPrimitiveType primitive, int start, int count, int instances=1)
    00070       : mStart(start), mCount(count)
    00071     {
    00072       VL_DEBUG_SET_OBJECT_NAME()
    00073       mInstances = instances;
    00074       mType = primitive;
    00075     }
    00076
    00077     DrawArrays& operator=(const DrawArrays& other)
    00078     {
    00079       super::operator=(other);
    00080       mStart     = other.mStart;
    00081       mCount     = other.mCount;
    00082       mInstances = other.mInstances;
    00083       return *this;
    00084     }
    00085
    00086     virtual ref<DrawCall> clone() const
    00087     {
    00088       return new DrawArrays( primitiveType(), (int)start(), (int)count(), (int)instances() );
    00089     }
    00090
    00091     virtual void deleteBufferObject() {}
    00092     virtual void updateDirtyBufferObject(EBufferObjectUpdateMode) {}
    00093
    00094     virtual void render(bool) const
    00095     {
    00096       // apply patch parameters if any and if using PT_PATCHES
    00097       applyPatchParameters();
    00098
    00099       if ( instances() > 1 && (Has_GL_ARB_draw_instanced||Has_GL_EXT_draw_instanced) )
    00100         VL_glDrawArraysInstanced( primitiveType(), (int)start(), (int)count(), (int)instances() );
    00101       else
    00102         glDrawArrays( primitiveType(), (int)start(), (int)count() );
    00103
    00104       #ifndef NDEBUG
    00105         unsigned int glerr = glGetError();
    00106         if (glerr != GL_NO_ERROR)
    00107         {
    00108           String msg( getGLErrorString(glerr) );
    00109           Log::error( Say("glGetError() [%s:%n]: %s\n") << __FILE__ << __LINE__ << msg );
    00110           Log::warning( "- If you are using geometry instancing in conjunction with display lists you will have to disable one of them.\n" );
    00111           Log::warning( "- If you are using OpenGL ES you must NOT use GL_QUADS, GL_QUAD_STRIP and GL_POLYGON primitive types.\n" );
    00112           VL_TRAP()
    00113         }
    00114       #endif
    00115     }
    00116
    00118     void setStart(int start) { mStart = start; }
    00119
    00121     int start() const { return mStart; }
    00122
    00124     void setCount(int count) { mCount = count; }
    00125
    00127     int count() const { return mCount; }
    00128
    00130     void setInstances(int instances) { mInstances = instances; }
    00131
    00133     int instances() const { return mInstances; }
    00134
    00135     TriangleIterator triangleIterator() const
    00136     {
    00137       ref<TriangleIteratorDirect> tid = new TriangleIteratorDirect( primitiveType() );
    00138       tid->initialize(mStart, mStart+mCount);
    00139       return TriangleIterator(tid.get());
    00140     }
    00141
    00142     IndexIterator indexIterator() const
    00143     {
    00144       ref<IndexIteratorDrawArrays> iida = new IndexIteratorDrawArrays;
    00145       iida->initialize( mStart, mCount );
    00146       IndexIterator iit;
    00147       iit.initialize( iida.get() );
    00148       return iit;
    00149     }
    00150
    00151     protected:
    00152       int mStart;
    00153       int mCount;
    00154       int mInstances;
    00155   };
    00156
    00157 }
    00158
    00159 #endif
    00160

Visualization Library v2011.09.1162 Reference Documentation
Copyright 2005-2011 Michele Bosi. All rights reserved.
Updated on Thu Jan 26 2012 00:43:36.
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