132 lines
4.4 KiB
C++
132 lines
4.4 KiB
C++
/*
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---------------------------------------------------------------------------
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Open Asset Import Library (ASSIMP)
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---------------------------------------------------------------------------
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Copyright (c) 2006-2008, ASSIMP Development Team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the following
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conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the ASSIMP team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the ASSIMP Development Team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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---------------------------------------------------------------------------
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*/
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#if (!defined AV_MESH_RENDERER_H_INCLUDED)
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#define AV_MESH_RENDERER_H_INCLUDED
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#define AI_VIEW_ALPHA_SORT_DELTA 3
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//-------------------------------------------------------------------------------
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/* Helper class tp render meshes
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*/
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//-------------------------------------------------------------------------------
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class CMeshRenderer
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{
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private:
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// default constructor
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CMeshRenderer()
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: m_bRotationChanged(true),
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m_iFrameCount(AI_VIEW_ALPHA_SORT_DELTA-1)
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{
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// no other members to initialize
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}
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public:
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//------------------------------------------------------------------
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// Singleton accessors
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static CMeshRenderer s_cInstance;
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inline static CMeshRenderer& Instance ()
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{
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return s_cInstance;
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}
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//------------------------------------------------------------------
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// Draw a mesh in the global mesh list using the current pipeline state
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// iIndex Index of the mesh to be drawn
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//
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// The function draws all faces in order, regardless of their distance
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int DrawUnsorted(unsigned int iIndex);
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//------------------------------------------------------------------
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// Draw a mesh in the global mesh list using the current pipeline state
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// iIndex Index of the mesh to be drawn
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//
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// The method sorts all vertices by their distance (back to front)
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//
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// mWorld World matrix for the node
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int DrawSorted(unsigned int iIndex,
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const aiMatrix4x4& mWorld);
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//------------------------------------------------------------------
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// Indicate that the rotation of the object or the camera has
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// been changed, thus the alpha order tree must be updated
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inline void SetRotationChangedFlag()
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{
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this->m_bRotationChanged = true;
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}
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//------------------------------------------------------------------
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// Reset the state of the class
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// Called whenever a new asset is loaded
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inline void Reset()
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{
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this->m_bRotationChanged = true;
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this->m_iFrameCount = 2;
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}
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//------------------------------------------------------------------
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// Called at the beginning of the frame. Reset the state
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// of the instance
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inline void OnBeginFrame()
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{
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if (0 == this->m_iFrameCount)
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{
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this->m_bRotationChanged = false;
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}
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}
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private:
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// true if the rotation of the object or camera has changed
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// in the last frame. If there were no changes it should
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// not be necessary to update the alpha ordering tree
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bool m_bRotationChanged;
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// only update the alpha order each AI_VIEW_ALPHA_SORT_DELTA frames
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unsigned int m_iFrameCount;
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};
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#endif //!! include guard
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