128 lines
3.2 KiB
C++
128 lines
3.2 KiB
C++
// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of NVIDIA CORPORATION nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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// 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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// Copyright (c) 2008-2025 NVIDIA Corporation. All rights reserved.
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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
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// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
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#include "GuConvexEdgeFlags.h"
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#include "GuFeatureCode.h"
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using namespace physx;
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using namespace Gu;
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static FeatureCode computeFeatureCode(PxReal u, PxReal v)
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{
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// Analysis
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if(u==0.0f)
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{
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if(v==0.0f)
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{
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// Vertex 0
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return FC_VERTEX0;
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}
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else if(v==1.0f)
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{
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// Vertex 2
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return FC_VERTEX2;
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}
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else
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{
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// Edge 0-2
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return FC_EDGE20;
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}
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}
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else if(u==1.0f)
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{
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if(v==0.0f)
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{
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// Vertex 1
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return FC_VERTEX1;
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}
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}
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else
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{
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if(v==0.0f)
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{
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// Edge 0-1
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return FC_EDGE01;
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}
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else
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{
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if((u+v)>=0.9999f)
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{
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// Edge 1-2
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return FC_EDGE12;
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}
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else
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{
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// Face
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return FC_FACE;
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}
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}
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}
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return FC_UNDEFINED;
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}
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bool Gu::selectNormal(PxU8 data, PxReal u, PxReal v)
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{
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bool useFaceNormal = false;
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const FeatureCode FC = computeFeatureCode(u, v);
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switch(FC)
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{
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case FC_VERTEX0:
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if(!(data & (Gu::ETD_CONVEX_EDGE_01|Gu::ETD_CONVEX_EDGE_20)))
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useFaceNormal = true;
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break;
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case FC_VERTEX1:
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if(!(data & (Gu::ETD_CONVEX_EDGE_01|Gu::ETD_CONVEX_EDGE_12)))
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useFaceNormal = true;
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break;
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case FC_VERTEX2:
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if(!(data & (Gu::ETD_CONVEX_EDGE_12|Gu::ETD_CONVEX_EDGE_20)))
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useFaceNormal = true;
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break;
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case FC_EDGE01:
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if(!(data & Gu::ETD_CONVEX_EDGE_01))
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useFaceNormal = true;
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break;
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case FC_EDGE12:
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if(!(data & Gu::ETD_CONVEX_EDGE_12))
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useFaceNormal = true;
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break;
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case FC_EDGE20:
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if(!(data & Gu::ETD_CONVEX_EDGE_20))
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useFaceNormal = true;
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break;
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case FC_FACE:
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useFaceNormal = true;
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break;
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case FC_UNDEFINED:
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break;
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};
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return useFaceNormal;
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}
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