mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
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c399655dcc
Sync'ing the 'dev' branch with the 'feature_3.0dev' branch at commit 68c6d11fc36761ae1a5e6cdc3457be16f2e9704a The branch 'feature_3.0dev' is now locked and preserved for historical purposes.
1189 lines
50 KiB
C++
1189 lines
50 KiB
C++
//
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// Copyright 2013 Pixar
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//
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// Licensed under the Apache License, Version 2.0 (the "Apache License")
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// with the following modification; you may not use this file except in
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// compliance with the Apache License and the following modification to it:
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// Section 6. Trademarks. is deleted and replaced with:
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//
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// 6. Trademarks. This License does not grant permission to use the trade
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// names, trademarks, service marks, or product names of the Licensor
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// and its affiliates, except as required to comply with Section 4(c) of
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// the License and to reproduce the content of the NOTICE file.
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//
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// You may obtain a copy of the Apache License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the Apache License with the above modification is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the Apache License for the specific
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// language governing permissions and limitations under the Apache License.
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//
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#include "../far/patchTables.h"
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#include "../far/patchTablesFactory.h"
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#include "../far/topologyRefiner.h"
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#include "../vtr/level.h"
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#include "../vtr/refinement.h"
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#include <cassert>
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#include <cstring>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Far {
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//
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// A convenience container for the different types of feature adaptive patches
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//
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template<class TYPE>
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struct PatchTypes {
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static const int NUM_TRANSITIONS=6,
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NUM_ROTATIONS=4;
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TYPE R[NUM_TRANSITIONS], // regular patch
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B[NUM_TRANSITIONS][NUM_ROTATIONS], // boundary patch (4 rotations)
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C[NUM_TRANSITIONS][NUM_ROTATIONS], // corner patch (4 rotations)
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G, // gregory patch
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GB; // gregory boundary patch
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PatchTypes() { std::memset(this, 0, sizeof(PatchTypes<TYPE>)); }
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// Returns the number of patches based on the patch type in the descriptor
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TYPE & getValue( PatchTables::Descriptor desc ) {
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switch (desc.GetType()) {
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case PatchTables::REGULAR : return R[desc.GetPattern()];
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case PatchTables::BOUNDARY : return B[desc.GetPattern()][desc.GetRotation()];
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case PatchTables::CORNER : return C[desc.GetPattern()][desc.GetRotation()];
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case PatchTables::GREGORY : return G;
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case PatchTables::GREGORY_BOUNDARY : return GB;
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default : assert(0);
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}
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// can't be reached (suppress compiler warning)
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return R[0];
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}
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// Counts the number of arrays required to store each type of patch used
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// in the primitive
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int getNumPatchArrays() const {
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int result=0;
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for (int i=0; i<6; ++i) {
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if (R[i]) ++result;
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for (int j=0; j<4; ++j) {
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if (B[i][j]) ++result;
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if (C[i][j]) ++result;
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}
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}
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if (G) ++result;
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if (GB) ++result;
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return result;
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}
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};
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typedef PatchTypes<unsigned int*> PatchCVPointers;
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typedef PatchTypes<PatchParam *> PatchParamPointers;
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typedef PatchTypes<int> PatchCounters;
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typedef PatchTypes<unsigned int **> PatchFVarPointers;
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//
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// A simple struct containing all information gathered about a face that is relevant
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// to constructing a patch for it (some of these enums should probably be defined more
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// as part of PatchTables)
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//
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// Like the HbrFace<T>::AdaptiveFlags, this struct aggregates all of the face tags
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// supporting feature adaptive refinement. For now it is not used elsewhere and can
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// remain local to this implementation, but we may want to move it into a header of
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// its own if it has greater use later.
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//
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// Note that several properties being assigned here attempt to do so given a 4-bit
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// mask of properties at the edges or vertices of the quad. Still not sure exactly
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// what will be done this way, but the goal is to create lookup tables (of size 16
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// for the 4 bits) to quickly determine was is needed, rather than iteration and
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// branching on the edges or vertices.
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//
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struct PatchFaceTag {
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public:
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// The HBR_ADAPTIVE TransitionType from <hbr/face.h> -- now named to more clearly
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// reflect the number and orientation of transitional edges. Note that the values
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// assigned here need to match the intended purpose to remain consistent with Hbr:
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enum TransitionType {
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NONE = 0,
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TRANS_ONE = 1,
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TRANS_TWO_ADJ = 2,
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TRANS_THREE = 3,
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TRANS_ALL = 4,
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TRANS_TWO_OPP = 5
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};
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public:
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unsigned int _hasPatch : 1;
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unsigned int _isRegular : 1;
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unsigned int _isTransitional : 1;
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unsigned int _transitionType : 3;
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unsigned int _transitionRot : 2;
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unsigned int _boundaryIndex : 2;
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unsigned int _boundaryCount : 3;
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unsigned int _hasBoundaryEdge : 3;
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void clear() { std::memset(this, 0, sizeof(*this)); }
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void assignBoundaryPropertiesFromEdgeMask(int boundaryEdgeMask) {
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//
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// The number of rotations to apply for boundary or corner patches varies on both
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// where the boundary/corner occurs and whether boundary or corner -- so using a
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// 4-bit mask should be sufficient to quickly determine all cases:
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//
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// Note that we currently expect patches with multiple boundaries to have already
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// been isolated, so asserts are applied for such unexpected cases.
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//
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// Is the compiler going to build the 16-entry lookup table here, or should we do
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// it ourselves?
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//
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_hasBoundaryEdge = true;
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switch (boundaryEdgeMask) {
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case 0x0: _boundaryCount = 0, _boundaryIndex = 0, _hasBoundaryEdge = false; break; // no boundaries
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case 0x1: _boundaryCount = 1, _boundaryIndex = 0; break; // boundary edge 0
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case 0x2: _boundaryCount = 1, _boundaryIndex = 1; break; // boundary edge 1
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case 0x3: _boundaryCount = 2, _boundaryIndex = 1; break; // corner/crease vertex 1
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case 0x4: _boundaryCount = 1, _boundaryIndex = 2; break; // boundary edge 2
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case 0x5: assert(false); break; // N/A - opposite boundary edges
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case 0x6: _boundaryCount = 2, _boundaryIndex = 2; break; // corner/crease vertex 2
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case 0x7: assert(false); break; // N/A - three boundary edges
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case 0x8: _boundaryCount = 1, _boundaryIndex = 3; break; // boundary edge 3
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case 0x9: _boundaryCount = 2, _boundaryIndex = 0; break; // corner/crease vertex 0
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case 0xa: assert(false); break; // N/A - opposite boundary edges
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case 0xb: assert(false); break; // N/A - three boundary edges
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case 0xc: _boundaryCount = 2, _boundaryIndex = 3; break; // corner/crease vertex 3
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case 0xd: assert(false); break; // N/A - three boundary edges
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case 0xe: assert(false); break; // N/A - three boundary edges
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case 0xf: assert(false); break; // N/A - all boundaries
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default: assert(false); break;
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}
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}
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void assignBoundaryPropertiesFromVertexMask(int boundaryVertexMask) {
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//
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// This is strictly needed for the irregular case when a vertex is a boundary in
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// the presence of no boundary edges -- an extra-ordinary face with only one corner
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// on the boundary.
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//
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// Its unclear at this point if patches with more than one such vertex are supported
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// (if so, how do we deal with rotations) so for now we only allow one such vertex
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// and assert for all other cases.
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//
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assert(_hasBoundaryEdge == false);
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switch (boundaryVertexMask) {
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case 0x0: _boundaryCount = 0; break; // no boundaries
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case 0x1: _boundaryCount = 1, _boundaryIndex = 0; break; // boundary vertex 0
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case 0x2: _boundaryCount = 1, _boundaryIndex = 1; break; // boundary vertex 1
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case 0x3: assert(false); break;
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case 0x4: _boundaryCount = 1, _boundaryIndex = 2; break; // boundary vertex 2
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case 0x5: assert(false); break;
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case 0x6: assert(false); break;
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case 0x7: assert(false); break;
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case 0x8: _boundaryCount = 1, _boundaryIndex = 3; break; // boundary vertex 3
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case 0x9: assert(false); break;
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case 0xa: assert(false); break;
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case 0xb: assert(false); break;
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case 0xc: assert(false); break;
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case 0xd: assert(false); break;
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case 0xe: assert(false); break;
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case 0xf: assert(false); break;
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default: assert(false); break;
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}
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}
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void assignTransitionRotationForCorner(int transitionEdgeMask) {
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//
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// Corner transition patches have only two interior edges that may be transitional.
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//
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// Either both are transitional (TRANS_TWO_ADJ) with only a single possible orientation,
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// or only one is transitional (TRANS_ONE) with two possibilities. The former case is
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// trivial. For the latter, use the known corner index to identify one of the two
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// possible transition masks and test to determine between the two cases.
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//
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if (_transitionType == TRANS_ONE) {
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int const edgeMaskPerCorner[] = { 4, 8, 1, 2 };
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_transitionRot = 1 + (edgeMaskPerCorner[_boundaryIndex] != transitionEdgeMask);
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} else {
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_transitionRot = 1;
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}
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}
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void assignTransitionRotationForBoundary(int transitionEdgeMask) {
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//
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// Boundary transition patches have three interior edges that may be transitional.
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//
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// The case of all three transitional (TRANS_THREE) has only one orientation, while the
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// case of two opposite transitional edges (TRANS_TWO_OPP) also has only one orientation.
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// So both of these are trivially handled.
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//
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// The case of a single transitional edge (TRANS_ONE) or one transitional edge (TRANS_TWO_ADJ)
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// both have multiple orientations -- three for TRANS_ONE and two for TRANS_TWO_ADJ. Each is
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// handled separately:
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//
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if (_transitionType == TRANS_ONE) {
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if (transitionEdgeMask == (1 << ((_boundaryIndex + 2) % 4))) {
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_transitionRot = 2;
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} else if (transitionEdgeMask == (1 << ((_boundaryIndex + 1) % 4))) {
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_transitionRot = 1;
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} else {
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_transitionRot = 3;
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}
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// XXXX manuelk mirror this rotation to match shader idiosyncracies
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_transitionRot = (4-_transitionRot)%4;
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} else if (_transitionType == TRANS_TWO_ADJ) {
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int const edgeMaskPerBoundary[] = { 6, 12, 9, 3 };
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_transitionRot = 1 + (edgeMaskPerBoundary[_boundaryIndex] == transitionEdgeMask);
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} else {
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_transitionRot = 1;
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}
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}
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void assignTransitionPropertiesFromEdgeMask(int transitionEdgeMask) {
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//
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// Note the transition rotations will be a function of the boundary rotations, and
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// so boundary rotations/index should have been previously assigned:
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//
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// As with the boundary rotation case, consider retrieving values from static 16-
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// entry lookup tables if possible (depending on the function involving boundary
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// rotations)...
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//
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_isTransitional = (transitionEdgeMask != 0);
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switch (transitionEdgeMask) {
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case 0x0: _transitionType = NONE; break; // no transitions
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case 0x1: _transitionType = TRANS_ONE; break; // single edge 0
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case 0x2: _transitionType = TRANS_ONE; break; // single edge 1
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case 0x3: _transitionType = TRANS_TWO_ADJ; break; // two adjacent edges, 0 and 1
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case 0x4: _transitionType = TRANS_ONE; break; // single edge 2
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case 0x5: _transitionType = TRANS_TWO_OPP; break; // two opposite edges, 0 and 2
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case 0x6: _transitionType = TRANS_TWO_ADJ; break; // two adjacent edges, 1 and 2
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case 0x7: _transitionType = TRANS_THREE; break; // three edges, all but 3
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case 0x8: _transitionType = TRANS_ONE; break; // single edge 3
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case 0x9: _transitionType = TRANS_TWO_ADJ; break; // two adjacent edges, 3 and 0
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case 0xa: _transitionType = TRANS_TWO_OPP; break; // two opposite edges, 1 and 3
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case 0xb: _transitionType = TRANS_THREE; break; // three edges, all but 2
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case 0xc: _transitionType = TRANS_TWO_ADJ; break; // two adjacent edges, 2 and 3
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case 0xd: _transitionType = TRANS_THREE; break; // three edges, all but 1
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case 0xe: _transitionType = TRANS_THREE; break; // three edges, all but 0
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case 0xf: _transitionType = TRANS_ALL; break; // all edges
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default: assert(false); break;
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}
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// May need another switch/lookup table here or combine it with the above -- the
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// results below are a function of both transition and boundary properties...
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if (transitionEdgeMask == 0) {
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_transitionRot = 0;
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} else if (_boundaryCount == 0) {
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// XXXX manuelk Rotations are mostly a direct map of the transitionEdgeMask
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// Except for:
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// - TRANS_TWO_ADJ that has rotation { 1, 2, 0, 3 }
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// - TRANS_THREE that has rotation { 3, 2, 1, 0 }
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// (matching shader idiosyncracies)
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static unsigned char transitionRots[16] = {0, 0, 1, 1, 2, 0, 2, 3, 3, 0, 1, 2, 3, 1, 0, 0};
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_transitionRot = transitionRots[transitionEdgeMask];
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} else if (_boundaryCount == 1) {
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assignTransitionRotationForBoundary(transitionEdgeMask);
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} else if (_boundaryCount == 2) {
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assignTransitionRotationForCorner(transitionEdgeMask);
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}
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}
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};
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typedef std::vector<PatchFaceTag> PatchTagVector;
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//
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// Trivial anonymous helper functions:
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//
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namespace {
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inline void
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offsetAndPermuteIndices(unsigned int const indices[], unsigned int count,
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unsigned int offset, unsigned int const permutation[],
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unsigned int result[]) {
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if (permutation) {
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for (unsigned int i = 0; i < count; ++i) {
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result[i] = offset + indices[permutation[i]];
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}
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} else if (offset) {
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for (unsigned int i = 0; i < count; ++i) {
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result[i] = offset + indices[i];
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}
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} else {
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std::memcpy(result, indices, count * sizeof(unsigned int));
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}
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}
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} // namespace anon
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//
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// Reserves tables based on the contents of the PatchArrayVector in the PatchTables:
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//
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void
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PatchTablesFactory::allocateTables(PatchTables * tables, int /* nlevels */) {
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PatchTables::PatchArrayVector const & parrays = tables->GetPatchArrayVector();
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int nverts = tables->GetNumControlVertices();
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int npatches = 0;
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for (int i=0; i<(int)parrays.size(); ++i) {
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npatches += parrays[i].GetNumPatches();
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}
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if (nverts==0 or npatches==0)
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return;
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tables->_patches.resize( nverts );
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tables->_paramTable.resize( npatches );
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}
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PatchTables::FVarPatchTables *
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PatchTablesFactory::allocateFVarTables( TopologyRefiner const & refiner,
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PatchTables const & tables, Options options ) {
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assert( refiner.GetNumFVarChannels()>0 );
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PatchTables::PatchArrayVector const & parrays = tables.GetPatchArrayVector();
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FVarPatchTables * fvarTables = new FVarPatchTables;
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fvarTables->_channels.resize( refiner.GetNumFVarChannels() );
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if (refiner.IsUniform()) {
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assert( not tables.IsFeatureAdaptive() );
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int maxlevel = refiner.GetMaxLevel();
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for (int channel=0; channel<refiner.GetNumFVarChannels(); ++channel) {
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int nverts = options.generateAllLevels ?
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refiner.GetNumFacesTotal() :
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refiner.GetNumFaces(maxlevel);
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assert(not parrays.empty());
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nverts *= parrays[0].GetDescriptor().GetNumFVarControlVertices();
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assert(nverts>0);
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fvarTables->_channels[channel].patchVertIndices.resize(nverts);
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}
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} else {
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assert( tables.IsFeatureAdaptive() );
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int nverts=0;
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for (int i=0; i<(int)parrays.size(); ++i) {
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nverts += parrays[i].GetNumPatches() *
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parrays[i].GetDescriptor().GetNumFVarControlVertices();
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}
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assert(nverts>0);
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for (int channel=0; channel<refiner.GetNumFVarChannels(); ++channel) {
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fvarTables->_channels[channel].patchVertIndices.resize(nverts);
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}
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}
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return fvarTables;
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}
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//
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// Creates a PatchArray and appends it to a vector and keeps track of both
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// vertex and patch offsets
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//
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void
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PatchTablesFactory::pushPatchArray( PatchTables::Descriptor desc,
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PatchTables::PatchArrayVector & parray,
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int npatches, int * voffset, int * poffset, int * qoffset ) {
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if (npatches>0) {
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parray.push_back( PatchTables::PatchArray(desc, *voffset, *poffset, npatches, *qoffset) );
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*voffset += npatches * desc.GetNumControlVertices();
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*poffset += npatches;
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*qoffset += (desc.GetType() == PatchTables::GREGORY) ? npatches * desc.GetNumControlVertices() : 0;
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}
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}
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//
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// Populates the face-varying data buffer 'coord' for the given face, returning
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// a pointer to the next descriptor
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//
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PatchParam *
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PatchTablesFactory::computePatchParam(TopologyRefiner const & refiner,
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int depth, Vtr::Index faceIndex, int rotation,
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PatchParam *coord) {
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if (coord == NULL) return NULL;
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// Move up the hierarchy accumulating u,v indices to the coarse level:
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int childIndexInParent = 0,
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u = 0,
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v = 0,
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ofs = 1;
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bool nonquad = (refiner.GetFaceVertices(depth, faceIndex).size() != 4);
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for (int i = depth; i > 0; --i) {
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Vtr::Refinement const& refinement = refiner.getRefinement(i-1);
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Vtr::Level const& parentLevel = refiner.getLevel(i-1);
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Vtr::Index parentFaceIndex = refinement.getChildFaceParentFace(faceIndex);
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childIndexInParent = refinement.getChildFaceInParentFace(faceIndex);
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if (parentLevel.getFaceVertices(parentFaceIndex).size() == 4) {
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switch ( childIndexInParent ) {
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case 0 : break;
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case 1 : { u+=ofs; } break;
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case 2 : { u+=ofs; v+=ofs; } break;
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case 3 : { v+=ofs; } break;
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}
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ofs = (unsigned short)(ofs << 1);
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} else {
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nonquad = true;
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// If the root face is not a quad, we need to offset the ptex index
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// CCW to match the correct child face
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Vtr::IndexArray children = refinement.getFaceChildFaces(parentFaceIndex);
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for (int j=0; j<children.size(); ++j) {
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if (children[j]==faceIndex) {
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childIndexInParent = j;
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break;
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}
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}
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}
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faceIndex = parentFaceIndex;
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}
|
|
|
|
Vtr::Index ptexIndex = refiner.GetPtexIndex(faceIndex);
|
|
assert(ptexIndex!=-1);
|
|
|
|
if (nonquad) {
|
|
ptexIndex+=childIndexInParent;
|
|
--depth;
|
|
}
|
|
|
|
coord->Set(ptexIndex, (short)u, (short)v, (unsigned char) rotation, (unsigned char) depth, nonquad);
|
|
|
|
return ++coord;
|
|
}
|
|
|
|
//
|
|
// Populate the quad-offsets table used by Gregory patches
|
|
//
|
|
void
|
|
PatchTablesFactory::getQuadOffsets(Vtr::Level const& level, Vtr::Index fIndex, unsigned int offsets[]) {
|
|
|
|
Vtr::IndexArray fVerts = level.getFaceVertices(fIndex);
|
|
|
|
for (int i = 0; i < 4; ++i) {
|
|
|
|
Vtr::Index vIndex = fVerts[i];
|
|
Vtr::IndexArray vFaces = level.getVertexFaces(vIndex),
|
|
vEdges = level.getVertexEdges(vIndex);
|
|
|
|
int thisFaceInVFaces = -1;
|
|
for (int j = 0; j < vFaces.size(); ++j) {
|
|
if (fIndex == vFaces[j]) {
|
|
thisFaceInVFaces = j;
|
|
break;
|
|
}
|
|
}
|
|
assert(thisFaceInVFaces != -1);
|
|
|
|
unsigned int vOffsets[2];
|
|
vOffsets[0] = thisFaceInVFaces;
|
|
vOffsets[1] = (thisFaceInVFaces + 1)%vEdges.size();
|
|
// we have to use the number of incident edges to modulo the local index
|
|
// because there could be 2 consecutive edges in the face belonging to
|
|
// the Gregory patch.
|
|
offsets[i] = vOffsets[0] | (vOffsets[1] << 8);
|
|
}
|
|
}
|
|
|
|
//
|
|
// We should be able to use a single Create() method for both the adaptive and uniform
|
|
// cases. In the past, more additional arguments were passed to the uniform version,
|
|
// but that may no longer be necessary (see notes in the uniform version below)...
|
|
//
|
|
PatchTables *
|
|
PatchTablesFactory::Create( TopologyRefiner const & refiner, Options options ) {
|
|
|
|
if (refiner.IsUniform()) {
|
|
return createUniform(refiner, options);
|
|
} else {
|
|
return createAdaptive(refiner, options);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gatherFVarPatchVertices(TopologyRefiner const & refiner,
|
|
int level, int faceIndex, int rotation, int const * levelOffsets, unsigned int ** fptrs) {
|
|
|
|
for (int channel=0; channel<refiner.GetNumFVarChannels(); ++channel) {
|
|
IndexArray const & fverts = refiner.GetFVarFaceValues(level, faceIndex, channel);
|
|
for (int vert=0; vert<fverts.size(); ++vert) {
|
|
fptrs[channel][vert] = levelOffsets[channel] + fverts[(vert+rotation)%4];
|
|
}
|
|
fptrs[channel]+=fverts.size();
|
|
}
|
|
}
|
|
|
|
PatchTables *
|
|
PatchTablesFactory::createUniform( TopologyRefiner const & refiner, Options options ) {
|
|
|
|
assert(refiner.IsUniform());
|
|
|
|
bool triangulateQuads = (options.triangulateQuads and
|
|
refiner.GetSchemeType()==Sdc::TYPE_LOOP);
|
|
|
|
int maxvalence = refiner.getLevel(0).getMaxValence(),
|
|
maxlevel = refiner.GetMaxLevel(),
|
|
firstlevel = options.generateAllLevels ? 0 : maxlevel,
|
|
nlevels = maxlevel-firstlevel+1,
|
|
nCVs = 0;
|
|
|
|
PatchTables::Type ptype = PatchTables::NON_PATCH;
|
|
switch (refiner.GetSchemeType()) {
|
|
case Sdc::TYPE_BILINEAR :
|
|
case Sdc::TYPE_CATMARK : ptype = PatchTables::QUADS; break;
|
|
case Sdc::TYPE_LOOP : ptype = PatchTables::TRIANGLES; break;
|
|
}
|
|
assert(ptype!=PatchTables::NON_PATCH);
|
|
|
|
switch (ptype) {
|
|
case PatchTables::TRIANGLES: nCVs=3; break;
|
|
case PatchTables::QUADS: nCVs=4; break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
|
|
//
|
|
// Create the instance of the tables and allocate and initialize its members.
|
|
//
|
|
PatchTables * tables = new PatchTables(maxvalence);
|
|
|
|
tables->_numPtexFaces = refiner.GetNumPtexFaces();
|
|
|
|
PatchTables::PatchArrayVector & parrays = tables->_patchArrays;
|
|
parrays.reserve( nlevels );
|
|
|
|
Descriptor desc( ptype, PatchTables::NON_TRANSITION, 0 );
|
|
|
|
// generate patch arrays
|
|
for (int level=firstlevel, poffset=0, voffset=0; level<=maxlevel; ++level) {
|
|
|
|
int npatches = refiner.GetNumFaces(level);
|
|
if (triangulateQuads) {
|
|
assert(ptype==PatchTables::QUADS);
|
|
npatches *= 2;
|
|
}
|
|
if (level>=firstlevel) {
|
|
parrays.push_back(PatchTables::PatchArray(desc, voffset, poffset, npatches, 0));
|
|
voffset += npatches * nCVs;
|
|
poffset += npatches;
|
|
}
|
|
}
|
|
|
|
// Allocate various tables
|
|
allocateTables( tables, 0 );
|
|
|
|
if (options.generateFVarTables) {
|
|
tables->_fvarPatchTables = allocateFVarTables( refiner, *tables, options );
|
|
}
|
|
|
|
//
|
|
// Now populate the patches:
|
|
//
|
|
unsigned int * iptr = &tables->_patches[0];
|
|
PatchParam * pptr = &tables->_paramTable[0];
|
|
unsigned int ** fptr=0;
|
|
|
|
if (tables->_fvarPatchTables) {
|
|
int nchannels = refiner.GetNumFVarChannels();
|
|
fptr = (unsigned int **)alloca(nchannels*sizeof(unsigned int *));
|
|
for (int channel=0; channel<nchannels; ++channel) {
|
|
fptr[channel] = const_cast<unsigned int *>(
|
|
&tables->_fvarPatchTables->_channels[channel].patchVertIndices[0]);
|
|
}
|
|
}
|
|
|
|
int levelVertOffset = options.generateAllLevels ? 0 : refiner.GetNumVertices(0);
|
|
|
|
int * levelFVarVertOffsets = 0;
|
|
if (tables->_fvarPatchTables) {
|
|
levelFVarVertOffsets = (int *)alloca(refiner.GetNumFVarChannels());
|
|
memset(levelFVarVertOffsets, 0, refiner.GetNumFVarChannels()*sizeof(int));
|
|
}
|
|
|
|
for (int level=1; level<=maxlevel; ++level) {
|
|
|
|
int nfaces = refiner.GetNumFaces(level);
|
|
if (level>=firstlevel) {
|
|
for (int face=0; face<nfaces; ++face) {
|
|
|
|
IndexArray const & fverts = refiner.GetFaceVertices(level, face);
|
|
|
|
for (int vert=0; vert<fverts.size(); ++vert) {
|
|
*iptr++ = levelVertOffset + fverts[vert];
|
|
}
|
|
|
|
pptr = computePatchParam(refiner, level, face, /*rot*/0, pptr);
|
|
|
|
if (tables->_fvarPatchTables) {
|
|
gatherFVarPatchVertices(refiner, level, face, 0, levelFVarVertOffsets, fptr);
|
|
}
|
|
|
|
if (triangulateQuads) {
|
|
// Triangulate the quadrilateral: {v0,v1,v2,v3} -> {v0,v1,v2},{v3,v0,v2}.
|
|
*iptr = *(iptr - 4); // copy v0 index
|
|
++iptr;
|
|
*iptr = *(iptr - 3); // copy v2 index
|
|
++iptr;
|
|
|
|
*pptr = *(pptr - 1); // copy first patch param
|
|
++pptr;
|
|
|
|
if (tables->_fvarPatchTables) {
|
|
for (int channel=0; channel<refiner.GetNumFVarChannels(); ++channel) {
|
|
*fptr[channel] = *(fptr[channel]-4); // copy fv0 index
|
|
*fptr[channel] = *(fptr[channel]-3); // copy fv2 index
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (options.generateAllLevels) {
|
|
levelVertOffset += refiner.GetNumVertices(level);
|
|
if (tables->_fvarPatchTables) {
|
|
int nchannels = refiner.GetNumFVarChannels();
|
|
for (int channel=0; channel<nchannels; ++channel) {
|
|
levelFVarVertOffsets[channel] += refiner.GetNumFVarValues(level, channel);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return tables;
|
|
}
|
|
|
|
PatchTables *
|
|
PatchTablesFactory::createAdaptive( TopologyRefiner const & refiner, Options options ) {
|
|
|
|
assert(not refiner.IsUniform());
|
|
|
|
//
|
|
// First identify the patches -- accumulating the inventory patches for all of the
|
|
// different types and information about the patch for each face:
|
|
//
|
|
PatchCounters patchInventory;
|
|
std::vector<PatchFaceTag> patchTags;
|
|
|
|
identifyAdaptivePatches(refiner, patchInventory, patchTags);
|
|
|
|
//
|
|
// Create the instance of the tables and allocate and initialize its members based on
|
|
// the inventory of patches determined above:
|
|
//
|
|
int maxValence = refiner.getLevel(0).getMaxValence();
|
|
|
|
PatchTables * tables = new PatchTables(maxValence);
|
|
|
|
// Populate the patch array descriptors
|
|
PatchTables::PatchArrayVector & parray = tables->_patchArrays;
|
|
parray.reserve( patchInventory.getNumPatchArrays() );
|
|
|
|
int voffset=0, poffset=0, qoffset=0;
|
|
|
|
for (Descriptor::iterator it=Descriptor::begin(Descriptor::FEATURE_ADAPTIVE_CATMARK);
|
|
it!=Descriptor::end(); ++it) {
|
|
pushPatchArray( *it, parray, patchInventory.getValue(*it), &voffset, &poffset, &qoffset );
|
|
}
|
|
|
|
tables->_numPtexFaces = refiner.GetNumPtexFaces();
|
|
|
|
// Allocate various tables
|
|
allocateTables( tables, 0 );
|
|
|
|
if (options.generateFVarTables) {
|
|
tables->_fvarPatchTables = allocateFVarTables( refiner, *tables, options );
|
|
}
|
|
|
|
// Specifics for Gregory patches
|
|
if ((patchInventory.G > 0) or (patchInventory.GB > 0)) {
|
|
tables->_quadOffsetTable.resize( patchInventory.G*4 + patchInventory.GB*4 );
|
|
}
|
|
|
|
//
|
|
// Now populate the patches:
|
|
//
|
|
populateAdaptivePatches(refiner, patchInventory, patchTags, tables);
|
|
|
|
return tables;
|
|
}
|
|
|
|
//
|
|
// Identify all patches required for faces at all levels -- accumulating the number of patches
|
|
// for each type, and retaining enough information for the patch for each face to populate it
|
|
// later with no additional analysis.
|
|
//
|
|
void
|
|
PatchTablesFactory::identifyAdaptivePatches( TopologyRefiner const & refiner,
|
|
PatchCounters & patchInventory,
|
|
PatchTagVector & patchTags ) {
|
|
|
|
//
|
|
// Iterate through the levels of refinement to inspect and tag components with information
|
|
// relative to patch generation. We allocate all of the tags locally and use them to
|
|
// populate the patches once a complete inventory has been taken and all tables appropriately
|
|
// allocated and initialized:
|
|
//
|
|
// The first Level may have no Refinement if it is the only level -- similarly the last Level
|
|
// has no Refinement, so a single level is effectively the last, but with less information
|
|
// available in some cases, as it was not generated by refinement.
|
|
//
|
|
patchTags.resize(refiner.GetNumFacesTotal());
|
|
|
|
PatchFaceTag * levelPatchTags = &patchTags[0];
|
|
|
|
for (int i = 0; i < (int)refiner.getNumLevels(); ++i) {
|
|
Vtr::Level const * level = &refiner.getLevel(i);
|
|
|
|
//
|
|
// Given components at Level[i], we need to be looking at Refinement[i] -- and not
|
|
// [i-1] -- because the Refinement has transitional information for its parent edges
|
|
// and faces. But we also need to be looking at Refinement[i-1] to know about the
|
|
// ancestry of the components, i.e. are they "complete" wrt their ancestors (if not,
|
|
// they are supporting components
|
|
//
|
|
// For components in this level, we want to determine:
|
|
// - what Edges are "transitional" (already done in Refinement for parent)
|
|
// - what Faces are "transitional" (already done in Refinement for parent)
|
|
// - what Faces are "complete" (done for child vertices in Refinement)
|
|
//
|
|
bool isLevelFirst = (i == 0);
|
|
bool isLevelLast = (i == ((int)refiner.getNumLevels() - 1));
|
|
|
|
Vtr::Refinement const * refinePrev = isLevelFirst ? 0 : &refiner.getRefinement(i-1);
|
|
Vtr::Refinement const * refineNext = isLevelLast ? 0 : &refiner.getRefinement(i);
|
|
|
|
Vtr::Refinement::SparseTag const * vtrFaceTags = refineNext ? &refineNext->_parentFaceTag[0] : 0;
|
|
|
|
for (int faceIndex = 0; faceIndex < level->getNumFaces(); ++faceIndex) {
|
|
Vtr::Refinement::SparseTag vtrFaceTag = vtrFaceTags ? vtrFaceTags[faceIndex] : Vtr::Refinement::SparseTag();
|
|
PatchFaceTag& patchTag = levelPatchTags[faceIndex];
|
|
|
|
patchTag.clear();
|
|
patchTag._hasPatch = false;
|
|
|
|
//
|
|
// This face does not warrant a patch under the following conditions:
|
|
//
|
|
// - the face was fully refined into child faces
|
|
// - the face is not a quad (should have been refined, so assert)
|
|
// - the face is not "complete"
|
|
//
|
|
// The first is trivially determined, and the second is really redundant. The
|
|
// last -- "incompleteness" -- indicates a face that exists to support the limit
|
|
// of some neighboring component, and which does not have its own neighborhood
|
|
// fully defined for its limit. If any child vertex of a vertex of this face is
|
|
// "incomplete", the face must be "incomplete" (note all faces in level 0 are
|
|
// complete and do not warrant closer inspection).
|
|
//
|
|
if (vtrFaceTag._selected) {
|
|
continue;
|
|
}
|
|
|
|
Vtr::IndexArray const& fVerts = level->getFaceVertices(faceIndex);
|
|
assert(fVerts.size() == 4);
|
|
|
|
if (!isLevelFirst and (refinePrev->_childVertexTag[fVerts[0]]._incomplete or
|
|
refinePrev->_childVertexTag[fVerts[1]]._incomplete or
|
|
refinePrev->_childVertexTag[fVerts[2]]._incomplete or
|
|
refinePrev->_childVertexTag[fVerts[3]]._incomplete)) {
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// We have a quad that will be represented as a B-spline or Gregory patch. Use
|
|
// the "composite" tag for the face that combines tags for all face-verts -- we
|
|
// can use it to quickly determine if any vertex is irregular or on a boundary.
|
|
//
|
|
// Inspect the edges for boundaries and transitional edges and pack results into
|
|
// 4-bit masks. We detect boundary edges rather than vertices as we hope to
|
|
// replace the mask in future with one for infinitely sharp edges -- allowing
|
|
// us to detect regular patches and avoid isolation. We still need to account
|
|
// for the irregular/xordinary case when a corner vertex is a boundary but there
|
|
// are no boundary edges.
|
|
//
|
|
// As for transition detection, assign the transition properties (even if 0) as
|
|
// their rotations override boundary rotations (when no transition)
|
|
//
|
|
// NOTE on non-manifold support:
|
|
// Patches from non-manifold verts are not yet supported -- the extraction
|
|
// of patch points at corners currently assumes manifold. Supporting interior
|
|
// hard edges (below) will allow non-manifold patches with inf sharp boundaries.
|
|
//
|
|
// NOTE on infinitely sharp (hard) edges:
|
|
// We should be able to adapt this later to detect hard (inf-sharp) edges
|
|
// rather than just boundary edges -- there is a similar tag per edge. That
|
|
// should allow us to generate regular patches for interior hard features.
|
|
//
|
|
Vtr::Level::VTag compFaceVertTag = level->getFaceCompositeVTag(fVerts);
|
|
|
|
// Patches for non-manifold faces not yet supported (see above note)
|
|
assert(!compFaceVertTag._nonManifold);
|
|
|
|
patchTag._hasPatch = true;
|
|
patchTag._isRegular = !compFaceVertTag._xordinary;
|
|
|
|
int boundaryEdgeMask = 0;
|
|
|
|
bool hasBoundaryVertex = compFaceVertTag._boundary;
|
|
if (hasBoundaryVertex) {
|
|
Vtr::IndexArray const& fEdges = level->getFaceEdges(faceIndex);
|
|
|
|
boundaryEdgeMask = ((level->_edgeTags[fEdges[0]]._boundary) << 0) |
|
|
((level->_edgeTags[fEdges[1]]._boundary) << 1) |
|
|
((level->_edgeTags[fEdges[2]]._boundary) << 2) |
|
|
((level->_edgeTags[fEdges[3]]._boundary) << 3);
|
|
|
|
if (boundaryEdgeMask) {
|
|
patchTag.assignBoundaryPropertiesFromEdgeMask(boundaryEdgeMask);
|
|
} else {
|
|
int boundaryVertMask = ((level->_vertTags[fVerts[0]]._boundary) << 0) |
|
|
((level->_vertTags[fVerts[1]]._boundary) << 1) |
|
|
((level->_vertTags[fVerts[2]]._boundary) << 2) |
|
|
((level->_vertTags[fVerts[3]]._boundary) << 3);
|
|
|
|
patchTag.assignBoundaryPropertiesFromVertexMask(boundaryVertMask);
|
|
}
|
|
}
|
|
patchTag.assignTransitionPropertiesFromEdgeMask(vtrFaceTag._transitional);
|
|
|
|
//
|
|
// This treatment may become optional in future -- consider approximating smooth
|
|
// corners with regular B-spline patches instead of Gregory. The smooth corner
|
|
// must be properly isolated from any other irregular vertices, otherwise the
|
|
// Gregory patch is necessary.
|
|
//
|
|
bool approxSmoothCornerWithRegularPatch = true;
|
|
if (approxSmoothCornerWithRegularPatch) {
|
|
if (!patchTag._isRegular && (patchTag._boundaryCount == 2)) {
|
|
// We may have a sharp corner opposite/adjacent an xordinary vertex --
|
|
// need to make sure there is only one xordinary vertex and that it
|
|
// is the corner vertex.
|
|
int xordCorner = 0;
|
|
int xordCount = 0;
|
|
if (level->_vertTags[fVerts[0]]._xordinary) { xordCount++; xordCorner = 0; }
|
|
if (level->_vertTags[fVerts[1]]._xordinary) { xordCount++; xordCorner = 1; }
|
|
if (level->_vertTags[fVerts[2]]._xordinary) { xordCount++; xordCorner = 2; }
|
|
if (level->_vertTags[fVerts[3]]._xordinary) { xordCount++; xordCorner = 3; }
|
|
|
|
if (xordCount == 1) {
|
|
// The two boundary edges must be either side of the corner vertex:
|
|
int const expectedCornerEdgeMask[4] = { 8+1, 1+2, 2+4, 4+8 };
|
|
if (boundaryEdgeMask == expectedCornerEdgeMask[xordCorner]) {
|
|
patchTag._isRegular = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Identify and increment counts for regular patches (both non-transitional and
|
|
// transitional) and extra-ordinary patches (always non-transitional):
|
|
//
|
|
if (patchTag._isRegular) {
|
|
int transIndex = patchTag._transitionType;
|
|
int transRot = patchTag._transitionRot;
|
|
|
|
if (patchTag._boundaryCount == 0) {
|
|
patchInventory.R[transIndex]++;
|
|
} else if (patchTag._boundaryCount == 1) {
|
|
patchInventory.B[transIndex][transRot]++;
|
|
} else {
|
|
patchInventory.C[transIndex][transRot]++;
|
|
}
|
|
} else {
|
|
if (patchTag._boundaryCount == 0) {
|
|
patchInventory.G++;
|
|
} else {
|
|
patchInventory.GB++;
|
|
}
|
|
}
|
|
}
|
|
levelPatchTags += level->getNumFaces();
|
|
}
|
|
}
|
|
|
|
//
|
|
// Populate all adaptive patches now that the tables to hold data for them have been allocated.
|
|
// We need the inventory (counts per patch type) and the patch tags per face that were previously
|
|
// idenified.
|
|
//
|
|
void
|
|
PatchTablesFactory::populateAdaptivePatches( TopologyRefiner const & refiner,
|
|
PatchCounters const & patchInventory,
|
|
PatchTagVector const & patchTags,
|
|
PatchTables * tables ) {
|
|
|
|
//
|
|
// Setup convenience pointers at the beginning of each patch array for each
|
|
// table (patches, ptex)
|
|
//
|
|
PatchCVPointers iptrs;
|
|
PatchParamPointers pptrs;
|
|
PatchFVarPointers fptrs;
|
|
|
|
for (Descriptor::iterator it=Descriptor::begin(Descriptor::FEATURE_ADAPTIVE_CATMARK); it!=Descriptor::end(); ++it) {
|
|
PatchTables::PatchArray * pa = tables->findPatchArray(*it);
|
|
|
|
if (not pa) continue;
|
|
|
|
iptrs.getValue( *it ) = &tables->_patches[pa->GetVertIndex()];
|
|
pptrs.getValue( *it ) = &tables->_paramTable[pa->GetPatchIndex()];
|
|
|
|
if (tables->_fvarPatchTables) {
|
|
int nchannels = refiner.GetNumFVarChannels(),
|
|
ncvs = pa->GetDescriptor().GetNumFVarControlVertices(); // XXXX manuelk this will break with bi-cubic fvar interp !!!
|
|
|
|
unsigned int ** fptr = (unsigned int **)alloca(nchannels*sizeof(unsigned int *));
|
|
for (int channel=0; channel<nchannels; ++channel) {
|
|
|
|
fptr[channel] = (unsigned int *)&tables->_fvarPatchTables->
|
|
_channels[channel].patchVertIndices[pa->GetPatchIndex()*ncvs];
|
|
}
|
|
fptrs.getValue( *it ) = fptr;
|
|
}
|
|
}
|
|
|
|
PatchTables::QuadOffsetTable::value_type *quad_G_C0_P = patchInventory.G>0 ? &tables->_quadOffsetTable[0] : 0;
|
|
PatchTables::QuadOffsetTable::value_type *quad_G_C1_P = patchInventory.GB>0 ? &tables->_quadOffsetTable[patchInventory.G*4] : 0;
|
|
|
|
std::vector<unsigned char> gregoryVertexFlags;
|
|
|
|
//
|
|
// To avoid gathering vertex neighborhoods for all vertices, identify vertices involved in
|
|
// gregory patches as the faces are traversed, to be gathered later:
|
|
//
|
|
bool hasGregoryPatches = (patchInventory.G > 0) or (patchInventory.GB > 0);
|
|
if (hasGregoryPatches) {
|
|
gregoryVertexFlags.resize(refiner.GetNumVerticesTotal(), false);
|
|
}
|
|
|
|
//
|
|
// Now iterate through the faces for all levels and populate the patches:
|
|
//
|
|
int levelFaceOffset = 0;
|
|
int levelVertOffset = 0;
|
|
int * levelFVarVertOffsets = 0;
|
|
if (tables->_fvarPatchTables) {
|
|
levelFVarVertOffsets = (int *)alloca(refiner.GetNumFVarChannels());
|
|
memset(levelFVarVertOffsets, 0, refiner.GetNumFVarChannels()*sizeof(int));
|
|
}
|
|
|
|
for (int i = 0; i < (int)refiner.getNumLevels(); ++i) {
|
|
Vtr::Level const * level = &refiner.getLevel(i);
|
|
|
|
const PatchFaceTag * levelPatchTags = &patchTags[levelFaceOffset];
|
|
|
|
for (int faceIndex = 0; faceIndex < level->getNumFaces(); ++faceIndex) {
|
|
const PatchFaceTag& patchTag = levelPatchTags[faceIndex];
|
|
|
|
if (!patchTag._hasPatch) continue;
|
|
|
|
if (patchTag._isRegular) {
|
|
unsigned int patchVerts[16];
|
|
|
|
int tIndex = patchTag._transitionType;
|
|
int rIndex = patchTag._transitionRot;
|
|
int bIndex = patchTag._boundaryIndex;
|
|
|
|
if (patchTag._boundaryCount == 0) {
|
|
unsigned int const permuteInterior[16] = { 5, 6, 7, 8, 4, 0, 1, 9, 15, 3, 2, 10, 14, 13, 12, 11 };
|
|
|
|
level->gatherQuadRegularInteriorPatchVertices(faceIndex, patchVerts, rIndex);
|
|
offsetAndPermuteIndices(patchVerts, 16, levelVertOffset, permuteInterior, iptrs.R[tIndex]);
|
|
|
|
iptrs.R[tIndex] += 16;
|
|
pptrs.R[tIndex] = computePatchParam(refiner, i, faceIndex, rIndex, pptrs.R[tIndex]);
|
|
|
|
if (tables->_fvarPatchTables) {
|
|
gatherFVarPatchVertices(refiner, i, faceIndex, rIndex, levelFVarVertOffsets, fptrs.R[tIndex]);
|
|
}
|
|
} else {
|
|
// For the boundary and corner cases, the Hbr code makes some adjustments to the
|
|
// rotations here from the way they were defined earlier. That raises questions
|
|
// as to the purpose of the earlier assignments and their naming. I'd prefer to
|
|
// label the sets of rotations for their intended purpose, and to compute and
|
|
// assign them earlier for use here with no adjustment.
|
|
//
|
|
// Non-transition case:
|
|
// rot = 0; // outside switch
|
|
// f->_adaptiveFlags.brots = (f->_adaptiveFlags.rots + 1) % 4;
|
|
// Transition case:
|
|
// rot = f->_adaptiveFlags.brots; // is this now same as transition rots?
|
|
//
|
|
// Both cases of "rot" above are now handled with the "transition rotation" -- still
|
|
// not clear what the purpose of the other is. Need to look into usage of these
|
|
// adaptive-flag rotations in:
|
|
// getOneRing, computePatchParam, computeFVarData
|
|
// It may be that a separate "face rotation" flag is warranted if we need something
|
|
// else dependent on the boundary orientation.
|
|
//
|
|
if (patchTag._boundaryCount == 1) {
|
|
unsigned int const permuteBoundary[12] = { 11, 3, 0, 4, 10, 2, 1, 5, 9, 8, 7, 6 };
|
|
|
|
level->gatherQuadRegularBoundaryPatchVertices(faceIndex, patchVerts, bIndex);
|
|
offsetAndPermuteIndices(patchVerts, 12, levelVertOffset, permuteBoundary, iptrs.B[tIndex][rIndex]);
|
|
|
|
iptrs.B[tIndex][rIndex] += 12;
|
|
pptrs.B[tIndex][rIndex] = computePatchParam(refiner, i, faceIndex, bIndex, pptrs.B[tIndex][rIndex]);
|
|
|
|
if (tables->_fvarPatchTables) {
|
|
gatherFVarPatchVertices(refiner, i, faceIndex, bIndex, levelFVarVertOffsets, fptrs.B[tIndex][rIndex]);
|
|
}
|
|
} else {
|
|
unsigned int const permuteCorner[9] = { 8, 3, 0, 7, 2, 1, 6, 5, 4 };
|
|
|
|
level->gatherQuadRegularCornerPatchVertices(faceIndex, patchVerts, bIndex);
|
|
offsetAndPermuteIndices(patchVerts, 9, levelVertOffset, permuteCorner, iptrs.C[tIndex][rIndex]);
|
|
|
|
bIndex = (bIndex+3)%4;
|
|
|
|
iptrs.C[tIndex][rIndex] += 9;
|
|
pptrs.C[tIndex][rIndex] = computePatchParam(refiner, i, faceIndex, bIndex, pptrs.C[tIndex][rIndex]);
|
|
|
|
if (tables->_fvarPatchTables) {
|
|
gatherFVarPatchVertices(refiner, i, faceIndex, bIndex, levelFVarVertOffsets, fptrs.C[tIndex][rIndex]);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (patchTag._boundaryCount == 0) {
|
|
// Gregory Regular Patch (4 CVs + quad-offsets / valence tables)
|
|
Vtr::IndexArray const faceVerts = level->getFaceVertices(faceIndex);
|
|
for (int j = 0; j < 4; ++j) {
|
|
iptrs.G[j] = faceVerts[j] + levelVertOffset;
|
|
gregoryVertexFlags[iptrs.G[j]] = true;
|
|
}
|
|
iptrs.G += 4;
|
|
|
|
getQuadOffsets(*level, faceIndex, quad_G_C0_P);
|
|
quad_G_C0_P += 4;
|
|
|
|
pptrs.G = computePatchParam(refiner, i, faceIndex, 0, pptrs.G);
|
|
|
|
if (tables->_fvarPatchTables) {
|
|
gatherFVarPatchVertices(refiner, i, faceIndex, 0, levelFVarVertOffsets, fptrs.G);
|
|
}
|
|
} else {
|
|
// Gregory Boundary Patch (4 CVs + quad-offsets / valence tables)
|
|
Vtr::IndexArray const faceVerts = level->getFaceVertices(faceIndex);
|
|
for (int j = 0; j < 4; ++j) {
|
|
iptrs.GB[j] = faceVerts[j] + levelVertOffset;
|
|
gregoryVertexFlags[iptrs.GB[j]] = true;
|
|
}
|
|
iptrs.GB += 4;
|
|
|
|
getQuadOffsets(*level, faceIndex, quad_G_C1_P);
|
|
quad_G_C1_P += 4;
|
|
|
|
int bIndex = (patchTag._boundaryIndex+1)%4;
|
|
|
|
pptrs.GB = computePatchParam(refiner, i, faceIndex, bIndex, pptrs.GB);
|
|
|
|
if (tables->_fvarPatchTables) {
|
|
gatherFVarPatchVertices(refiner, i, faceIndex, 0, levelFVarVertOffsets, fptrs.GB);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
levelFaceOffset += level->getNumFaces();
|
|
levelVertOffset += level->getNumVertices();
|
|
if (tables->_fvarPatchTables) {
|
|
int nchannels = refiner.GetNumFVarChannels();
|
|
for (int channel=0; channel<nchannels; ++channel) {
|
|
levelFVarVertOffsets[channel] += refiner.GetNumFVarValues(i, channel);
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Now deal with the "vertex valence" table for Gregory patches -- this table contains the one-ring
|
|
// of vertices around each vertex. Currently it is extremely wasteful for the following reasons:
|
|
// - it allocates 2*maxvalence+1 for ALL vertices
|
|
// - it initializes the one-ring for ALL vertices
|
|
// We use the full size expected (not sure what else relies on that) but we avoiding initializing
|
|
// the vast majority of vertices that are not associated with gregory patches -- by having previously
|
|
// marked those that are associated above and skipping all others.
|
|
//
|
|
if (hasGregoryPatches) {
|
|
const int SizePerVertex = 2*tables->_maxValence + 1;
|
|
|
|
PatchTables::VertexValenceTable & vTable = tables->_vertexValenceTable;
|
|
vTable.resize(refiner.GetNumVerticesTotal() * SizePerVertex);
|
|
|
|
int vOffset = 0;
|
|
int levelLast = (int)refiner.getNumLevels() - 1;
|
|
for (int i = 0; i <= levelLast; ++i) {
|
|
|
|
Vtr::Level const * level = &refiner.getLevel(i);
|
|
|
|
if (i == levelLast) {
|
|
|
|
int vTableOffset = vOffset * SizePerVertex;
|
|
|
|
for (int vIndex = 0; vIndex < level->getNumVertices(); ++vIndex) {
|
|
int* vTableEntry = &vTable[vTableOffset];
|
|
|
|
//
|
|
// If not marked as a vertex of a gregory patch, just set to 0 to ignore. Otherwise
|
|
// gather the one-ring around the vertex and set its resulting size (note the negative
|
|
// size used to distinguish between boundary/interior):
|
|
//
|
|
//if (!gregoryVertexFlags[vIndex + vOffset]) {
|
|
vTableEntry[0] = 0;
|
|
//} else {
|
|
|
|
int * ringDest = vTableEntry + 1,
|
|
ringSize = level->gatherManifoldVertexRingFromIncidentQuads(vIndex, vOffset, ringDest);
|
|
|
|
if (ringSize & 1) {
|
|
// boundary vertex : duplicate boundary vertex index
|
|
// and store negative valence.
|
|
ringSize++;
|
|
vTableEntry[ringSize]=vTableEntry[ringSize-1];
|
|
vTableEntry[0] = -ringSize/2;
|
|
} else {
|
|
vTableEntry[0] = ringSize/2;
|
|
}
|
|
//}
|
|
vTableOffset += SizePerVertex;
|
|
}
|
|
}
|
|
vOffset += level->getNumVertices();
|
|
}
|
|
}
|
|
}
|
|
|
|
} // end namespace Far
|
|
|
|
} // end namespace OPENSUBDIV_VERSION
|
|
} // end namespace OpenSubdiv
|