117 lines
3.5 KiB
C++
117 lines
3.5 KiB
C++
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/****************************************************************************
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Copyright (c) 2011-2013,WebJet Business Division,CYOU
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http://www.genesis-3d.com.cn
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "stdneb.h"
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#include "PrimitiveGroup.h"
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namespace RenderBase
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{
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__ImplementClass(PrimitiveGroup,'PGRS',RenderCommandType)
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PrimitiveGroup::PrimitiveGroup() :
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baseVertex(0),
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numVertices(0),
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baseIndex(0),
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numIndices(0),
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m_InstanceCount(0),
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primitiveTopology(PrimitiveTopology::InvalidPrimitiveTopology)
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{
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}
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PrimitiveGroup::~PrimitiveGroup()
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{
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Discard();
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// empty
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}
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void PrimitiveGroup::Discard()
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{
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baseVertex = 0;
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numVertices = 0;
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baseIndex = 0;
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numIndices = 0;
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m_vertexBuffer = NULL;
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m_indexBuffer = NULL;
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m_InstanceVBuffers.Clear();
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}
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//------------------------------------------------------------------------------
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/**
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Computes the number of primitives from a given primitive topology
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and number of vertices (the opposite of ComputeNumberOfVertices()).
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*/
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SizeT
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PrimitiveGroup::NumberOfPrimitives(PrimitiveTopology::Code topology, SizeT numVertices) const
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{
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switch (topology)
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{
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case PrimitiveTopology::PointList: return numVertices;
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case PrimitiveTopology::LineList: return numVertices / 2;
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case PrimitiveTopology::LineStrip: return numVertices - 1;
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case PrimitiveTopology::TriangleList: return numVertices / 3;
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case PrimitiveTopology::TriangleStrip: return numVertices - 2;
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default:
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n_error("PrimitiveTopology::NumberOfPrimitives(): invalid topology!");
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return InvalidIndex;
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}
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}
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//------------------------------------------------------------------------------
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/**
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Computes the number of required vertices for a given primitive
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topology and number of primitives.
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*/
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SizeT
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PrimitiveGroup::NumberOfVertices(PrimitiveTopology::Code topology, SizeT numPrimitives) const
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{
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switch (topology)
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{
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case PrimitiveTopology::PointList: return numPrimitives;
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case PrimitiveTopology::LineList: return numPrimitives * 2;
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case PrimitiveTopology::LineStrip: return numPrimitives + 1;
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case PrimitiveTopology::TriangleList: return numPrimitives * 3;
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case PrimitiveTopology::TriangleStrip: return numPrimitives + 2;
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default:
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n_error("PrimitiveTopology::NumberOfVertices(): invalid topology!");
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return InvalidIndex;
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}
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}
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void PrimitiveGroup::OnDeviceLost()
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{
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}
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void PrimitiveGroup::OnDeviceReset()
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{
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}
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}
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