mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
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192 lines
9.2 KiB
C++
192 lines
9.2 KiB
C++
//
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// Copyright (C) Pixar. All rights reserved.
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//
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// This license governs use of the accompanying software. If you
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// use the software, you accept this license. If you do not accept
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// the license, do not use the software.
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//
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// 1. Definitions
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// The terms "reproduce," "reproduction," "derivative works," and
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// "distribution" have the same meaning here as under U.S.
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// copyright law. A "contribution" is the original software, or
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// any additions or changes to the software.
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// A "contributor" is any person or entity that distributes its
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// contribution under this license.
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// "Licensed patents" are a contributor's patent claims that read
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// directly on its contribution.
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//
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// 2. Grant of Rights
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// (A) Copyright Grant- Subject to the terms of this license,
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// including the license conditions and limitations in section 3,
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// each contributor grants you a non-exclusive, worldwide,
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// royalty-free copyright license to reproduce its contribution,
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// prepare derivative works of its contribution, and distribute
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// its contribution or any derivative works that you create.
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// (B) Patent Grant- Subject to the terms of this license,
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// including the license conditions and limitations in section 3,
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// each contributor grants you a non-exclusive, worldwide,
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// royalty-free license under its licensed patents to make, have
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// made, use, sell, offer for sale, import, and/or otherwise
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// dispose of its contribution in the software or derivative works
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// of the contribution in the software.
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//
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// 3. Conditions and Limitations
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// (A) No Trademark License- This license does not grant you
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// rights to use any contributor's name, logo, or trademarks.
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// (B) If you bring a patent claim against any contributor over
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// patents that you claim are infringed by the software, your
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// patent license from such contributor to the software ends
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// automatically.
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// (C) If you distribute any portion of the software, you must
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// retain all copyright, patent, trademark, and attribution
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// notices that are present in the software.
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// (D) If you distribute any portion of the software in source
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// code form, you may do so only under this license by including a
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// complete copy of this license with your distribution. If you
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// distribute any portion of the software in compiled or object
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// code form, you may only do so under a license that complies
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// with this license.
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// (E) The software is licensed "as-is." You bear the risk of
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// using it. The contributors give no express warranties,
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// guarantees or conditions. You may have additional consumer
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// rights under your local laws which this license cannot change.
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// To the extent permitted under your local laws, the contributors
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// exclude the implied warranties of merchantability, fitness for
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// a particular purpose and non-infringement.
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//
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#include "../osd/cpuEvalLimitController.h"
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#include "../osd/cpuEvalLimitKernel.h"
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#include "../far/patchTables.h"
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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OsdCpuEvalLimitController::OsdCpuEvalLimitController() {
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}
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OsdCpuEvalLimitController::~OsdCpuEvalLimitController() {
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}
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int
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OsdCpuEvalLimitController::_EvalLimitSample( OpenSubdiv::OsdEvalCoords const & coords,
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OsdCpuEvalLimitContext const *context,
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unsigned int index ) {
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int npatches=0;
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FarPatchTables::PatchHandle const * patchHandles;
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// Get the list of all children patches of the face described in coords
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if (not context->GetPatchesMap()->GetChildPatchesHandles(coords.face, &npatches, &patchHandles))
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return 0;
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// Position lookup pointers at the indexed vertex
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float const * inQ = context->GetInputVertexData();
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float * outQ = context->GetOutputVertexData() + index * context->GetOutputDesc().stride;
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float * outdQu = context->GetOutputVertexDataUDerivative() + index * context->GetOutputDesc().stride;
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float * outdQv = context->GetOutputVertexDataVDerivative() + index * context->GetOutputDesc().stride;
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for (int i=0; i<npatches; ++i) {
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FarPatchTables::PatchHandle const & handle = patchHandles[i];
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FarPatchParam::BitField bits = context->GetPatchBitFields()[ handle.serialIndex ];
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float frac;
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if (bits.NonQuadRoot()) {
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frac = 1.0f / float( 1 << (bits.GetDepth()-1) );
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} else {
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frac = 1.0f / float( 1 << bits.GetDepth() );
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}
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// Are the coordinates within the parametric space covered by the patch ?
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float pu = (float)bits.GetU()*frac;
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if ( (coords.u < pu) or (coords.u > pu+frac) )
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continue;
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float pv = (float)bits.GetV()*frac;
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if ( (coords.v < pv) or (coords.v > pv+frac) )
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continue;
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assert( handle.array < context->GetPatchArrayVector().size() );
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FarPatchTables::PatchArray const & parray = context->GetPatchArrayVector()[ handle.array ];
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unsigned int const * cvs = &context->GetControlVertices()[ parray.GetVertIndex() + handle.vertexOffset ];
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// normalize u,v coordinates
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float u = (coords.u - pu) / frac,
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v = (coords.v - pv) / frac;
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assert( (u>=0.0f) and (u<=1.0f) and (v>=0.0f) and (v<=1.0f) );
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typedef FarPatchTables::Descriptor PD;
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// Rotate u,v to compensate for transition pattern and boundary orientations
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switch( bits.GetRotation() ) {
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case 0 : break;
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case 1 : { float tmp=v; v=1.0f-u; u=tmp; } break;
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case 2 : { u=1.0f-u; v=1.0f-v; } break;
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case 3 : { float tmp=u; u=1.0f-v; v=tmp; } break;
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default:
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assert(0);
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}
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// Based on patch type - go execute interpolation
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switch( parray.GetDescriptor().GetType() ) {
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case FarPatchTables::REGULAR : { evalBSpline( v, u, cvs,
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context->GetInputDesc(),
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inQ,
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context->GetOutputDesc(),
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outQ, outdQu, outdQv);
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return 1; }
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case FarPatchTables::BOUNDARY : { evalBoundary( v, u, cvs,
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context->GetInputDesc(),
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inQ,
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context->GetOutputDesc(),
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outQ, outdQu, outdQv);
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return 1; }
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case FarPatchTables::CORNER : { evalCorner( v, u, cvs,
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context->GetInputDesc(),
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inQ,
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context->GetOutputDesc(),
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outQ, outdQu, outdQv);
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return 1; }
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case FarPatchTables::GREGORY : { evalGregory(v, u, cvs,
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context->GetVertexValenceBuffer(),
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context->GetQuadOffsetBuffer() + parray.GetQuadOffsetIndex() + handle.vertexOffset,
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context->GetMaxValence(),
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context->GetInputDesc(),
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inQ,
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context->GetOutputDesc(),
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outQ, outdQu, outdQv);
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return 1; }
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case FarPatchTables::GREGORY_BOUNDARY : {
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evalGregoryBoundary(v, u, cvs,
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context->GetVertexValenceBuffer(),
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context->GetQuadOffsetBuffer() + parray.GetQuadOffsetIndex() + handle.vertexOffset,
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context->GetMaxValence(),
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context->GetInputDesc(),
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inQ,
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context->GetOutputDesc(),
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outQ, outdQu, outdQv);
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return 1; }
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default:
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assert(0);
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}
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}
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return 0;
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}
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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