mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
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a79832b3a1
- remove Descriptor iterators - switch 'unsigned int' indices to typed Far::Index We aren't done yet... but its a step in the right direction
838 lines
29 KiB
C++
838 lines
29 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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#ifndef FAR_PATCH_TABLES_H
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#define FAR_PATCH_TABLES_H
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#include "../version.h"
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#include "../far/patchParam.h"
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#include "../far/patchParam.h"
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#include "../far/types.h"
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#include "../sdc/type.h"
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#include <cstdlib>
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#include <cassert>
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#include <algorithm>
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#include <vector>
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#include <map>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Far {
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/// \brief Container for patch vertex indices tables
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///
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/// PatchTables contain the lists of vertices for each patch of an adaptive
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/// mesh representation.
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///
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class PatchTables {
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public:
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typedef std::vector<Index> PTable;
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typedef std::vector<Index> VertexValenceTable;
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typedef std::vector<Index> QuadOffsetTable;
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typedef std::vector<PatchParam> PatchParamTable;
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enum Type {
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NON_PATCH = 0, ///< undefined
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POINTS, ///< points (useful for cage drawing)
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LINES, ///< lines (useful for cage drawing)
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QUADS, ///< bilinear quads-only patches
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TRIANGLES, ///< bilinear triangles-only mesh
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LOOP, ///< Loop patch (currently unsupported)
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REGULAR, ///< feature-adaptive bicubic patches
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BOUNDARY,
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CORNER,
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GREGORY,
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GREGORY_BOUNDARY
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};
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enum TransitionPattern {
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NON_TRANSITION = 0,
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PATTERN0,
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PATTERN1,
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PATTERN2,
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PATTERN3,
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PATTERN4
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};
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public:
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/// \brief Describes the type of a patch
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///
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/// Uniquely identifies all the types of patches in a mesh :
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///
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/// * Raw polygon meshes are identified as POLYGONS and can contain faces
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/// with arbitrary number of vertices
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///
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/// * Uniformly subdivided meshes contain bilinear patches of either QUADS
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/// or TRIANGLES
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///
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/// * Adaptively subdivided meshes contain bicubic patches of types REGULAR,
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/// BOUNDARY, CORNER, GREGORY, GREGORY_BOUNDARY. These bicubic patches are
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/// also further distinguished by a transition pattern as well as a rotational
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/// orientation.
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///
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class Descriptor {
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public:
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/// \brief Default constructor.
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Descriptor() :
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_type(NON_PATCH), _pattern(NON_TRANSITION), _rotation(0) {}
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/// \brief Constructor
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Descriptor(int type, int pattern, unsigned char rotation) :
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_type(type), _pattern(pattern), _rotation(rotation) { }
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/// \brief Copy Constructor
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Descriptor( Descriptor const & d ) :
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_type(d.GetType()), _pattern(d.GetPattern()), _rotation(d.GetRotation()) { }
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/// \brief Returns the type of the patch
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Type GetType() const {
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return (Type)_type;
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}
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/// \brief Returns the transition pattern of the patch if any (5 types)
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TransitionPattern GetPattern() const {
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return (TransitionPattern)_pattern;
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}
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/// \brief Returns the rotation of the patch (4 rotations)
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unsigned char GetRotation() const {
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return (unsigned char)_rotation;
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}
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/// \brief Returns the number of control vertices expected for a patch of the
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/// type described
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static inline short GetNumControlVertices( Type t );
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static inline short GetNumFVarControlVertices( Type t );
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/// \brief Returns the number of control vertices expected for a patch of the
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/// type described
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short GetNumControlVertices() const {
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return GetNumControlVertices( this->GetType() );
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}
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/// \brief Returns the number of control vertices expected for a patch of the
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/// type described
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short GetNumFVarControlVertices() const {
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return GetNumFVarControlVertices( this->GetType() );
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}
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/// \brief Allows ordering of patches by type
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inline bool operator < ( Descriptor const other ) const;
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/// \brief True if the descriptors are identical
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inline bool operator == ( Descriptor const other ) const;
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private:
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friend class PatchTablesFactory;
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unsigned int _type:4;
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unsigned int _pattern:3;
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unsigned int _rotation:2;
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};
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typedef std::vector<Descriptor> DescriptorVector;
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/// \brief Returns a vector of all the legal patch descriptors for the
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/// given adaptive subdivision scheme
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static DescriptorVector const & GetAdaptiveDescriptors(Sdc::Type type);
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public:
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/// \brief Array of patches of the same type
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class PatchArray {
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public:
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/// \brief Constructor.
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///
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/// @param desc descriptor information for the patches in
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/// the array
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///
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/// @param vertIndex absolute index to the first control vertex
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/// of the first patch in the PTable
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///
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/// @param patchIndex absolute index of the first patch in the
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/// array
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///
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/// @param npatches number of patches in the array
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///
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/// @param quadOffsetIndex absolute index of the first quad offset
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/// entry
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///
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PatchArray( Descriptor desc, Index vertIndex, Index patchIndex,
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Index npatches, Index quadOffsetIndex ) :
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_desc(desc), _range(vertIndex, patchIndex, npatches, quadOffsetIndex) { }
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/// Returns a patch descriptor defining the type of patches in the array
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Descriptor GetDescriptor() const {
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return _desc;
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}
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/// \brief Describes the range of patches in a PatchArray
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struct ArrayRange {
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/// \brief Constructor
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///
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/// @param vIndex absolute index to the first control vertex
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/// of the first patch in the PTable
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///
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/// @param pIndex absolute index of the first patch in the
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/// array
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///
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/// @param npatches number of patches in the array
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///
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/// @param qoIndex absolute index of the first quad offset
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/// entry
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///
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ArrayRange( Index vIndex, Index pIndex, int npatches, Index qoIndex ) :
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npatches(npatches), vertIndex(vIndex), patchIndex(pIndex),
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quadOffsetIndex(qoIndex) { }
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int npatches; ///< number of patches in the array
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Index vertIndex, ///< absolute index to the first control vertex of the first patch in the PTable
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patchIndex, ///< absolute index of the first patch in the array
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quadOffsetIndex; ///< absolute index of the first quad offset entry
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};
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/// \brief Returns a array range struct
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ArrayRange const & GetArrayRange() const {
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return _range;
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}
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/// \brief Returns the index of the first control vertex of the first patch
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/// of this array in the global PTable
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Index GetVertIndex() const {
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return _range.vertIndex;
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}
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/// \brief Returns the global index of the first patch in this array (Used to
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/// access param / fvar table data)
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Index GetPatchIndex() const {
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return _range.patchIndex;
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}
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/// \brief Returns the number of patches in the array
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int GetNumPatches() const {
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return _range.npatches;
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}
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/// \brief Returns the index to the first entry in the QuadOffsetTable
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Index GetQuadOffsetIndex() const {
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return _range.quadOffsetIndex;
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}
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private:
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friend class PatchTablesFactory;
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Descriptor _desc; // type of patches in the array
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ArrayRange _range; // index locators in the array
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};
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typedef std::vector<PatchArray> PatchArrayVector;
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/// \brief Handle that can be used as unique patch identifier within PatchTables
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struct PatchHandle {
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Index patchArrayIdx, ///< OsdPatchArray containing the patch
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patchIdx, ///< Index of the patch in the OsdPatchArray
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vertexOffset; ///< Relative offset to the first CV of the patch in the patch array
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};
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/// \brief Get the table of patch control vertices
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PTable const & GetPatchTable() const { return _patches; }
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/// \brief Returns a pointer to the array of patches matching the descriptor
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PatchArray const * GetPatchArray( Descriptor desc ) const {
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return const_cast<PatchTables *>(this)->findPatchArray( desc );
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}
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/// \brief Returns all arrays of patches
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PatchArrayVector const & GetPatchArrayVector() const {
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return _patchArrays;
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}
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/// brief Returns a pointer to the PatchArry of uniformly subdivided faces at 'level'
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///
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/// @param level the level of subdivision of the faces (returns the highest
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/// level by default)
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///
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/// @return a pointer to the PatchArray or NULL if the mesh is not uniformly
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/// subdivided or the level cannot be found.
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///
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PatchArray const * GetUniformPatchArray(int level=0) const;
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/// \brief Returns a pointer to the vertex indices of uniformly subdivided faces
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///
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/// In uniform mode the PatchTablesFactory can be set to generate either a
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/// patch array containing the faces at the highest level of subdivision, or
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/// a range of arrays, corresponding to multiple successive levels of subdivision.
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///
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/// Note : level '0' is not the coarse mesh. Currently there is no path in the
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/// factories to convert the coarse mesh to PatchTables.
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///
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/// @param level the level of subdivision of the faces (returns the highest
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/// level by default)
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///
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/// @return a pointer to the first vertex index or NULL if the mesh
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/// is not uniformly subdivided or the level cannot be found.
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///
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Index const * GetUniformFaceVertices(int level=0) const;
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/// \brief Returns the number of faces in a uniformly subdivided mesh at a given level
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///
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/// In uniform mode the PatchTablesFactory can be set to generate either a
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/// patch array containing the faces at the highest level of subdivision, or
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/// a range of arrays, corresponding to multiple successive levels of subdivision.
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///
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/// Note : level '0' is not the coarse mesh. Currently there is no path in the
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/// factories to convert the coarse mesh to PatchTables.
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///
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/// @param level the level of subdivision of the faces (returns the highest
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/// level by default)
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///
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/// @return the number of faces in the mesh given the subdivision level
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/// or -1 if the mesh is not uniform or the level is incorrect.
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///
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int GetNumUniformFaces(int level=0) const;
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/// \brief Returns a vertex valence table used by Gregory patches
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VertexValenceTable const & GetVertexValenceTable() const { return _vertexValenceTable; }
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/// \brief Returns a quad offsets table used by Gregory patches
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QuadOffsetTable const & GetQuadOffsetTable() const { return _quadOffsetTable; }
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/// \brief Returns a PatchParamTable for each type of patch
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PatchParamTable const & GetPatchParamTable() const { return _paramTable; }
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/// \brief Number of control vertices of Regular Patches in table.
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static short GetRegularPatchSize() { return 16; }
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/// \brief Number of control vertices of Boundary Patches in table.
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static short GetBoundaryPatchSize() { return 12; }
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/// \brief Number of control vertices of Boundary Patches in table.
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static short GetCornerPatchSize() { return 9; }
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/// \brief Number of control vertices of Gregory (and Gregory Boundary) Patches in table.
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static short GetGregoryPatchSize() { return 4; }
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/// \brief Returns the total number of patches stored in the tables
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int GetNumPatchesTotal() const;
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/// \brief Returns the total number of control vertex indices in the tables
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int GetNumControlVerticesTotal() const;
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/// \brief Returns max vertex valence
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int GetMaxValence() const { return _maxValence; }
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/// \brief True if the patches are of feature adaptive types
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bool IsFeatureAdaptive() const;
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/// \brief Returns the total number of vertices in the mesh across across all depths
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int GetNumPtexFaces() const { return _numPtexFaces; }
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/// \brief Face-varying patch vertex indices tables
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///
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/// FVarPatchTables contain the topology for face-varying primvar data
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/// channels. The patch ordering matches that of PatchTables PatchArrays.
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///
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class FVarPatchTables {
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public:
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/// \brief Returns the number of face-varying primvar channels
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int GetNumChannels() const {
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return (int)_channels.size();
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}
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/// \brief Returns the face-varying patches vertex indices
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///
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/// @param channel Then face-varying primvar channel index
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///
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std::vector<Index> const & GetPatchVertices(int channel) const {
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return _channels[channel].patchVertIndices;
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}
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private:
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friend class PatchTablesFactory;
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struct Channel {
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friend class PatchTablesFactory;
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std::vector<Index> patchVertIndices; // face-varying vertex indices
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};
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std::vector<Channel> _channels; // face-varying primvar channels
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};
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/// \brief Returns the face-varying patches
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FVarPatchTables const * GetFVarPatchTables() const { return _fvarPatchTables; }
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/// \brief Public constructor
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///
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/// @param patchArrays Vector of descriptors and ranges for arrays of patches
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///
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/// @param patches Indices of the control vertices of the patches
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///
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/// @param vertexValences Vertex valance table
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///
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/// @param quadOffsets Quad offset table
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///
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/// @param fvarPatchTables Indices of the face-varying control vertices of the patches
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///
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/// @param patchParams Local patch parameterization
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///
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/// @param maxValence Highest vertex valence allowed in the mesh
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///
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PatchTables(PatchArrayVector const & patchArrays,
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PTable const & patches,
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VertexValenceTable const * vertexValences,
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QuadOffsetTable const * quadOffsets,
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PatchParamTable const * patchParams,
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FVarPatchTables const * fvarPatchTables,
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int maxValence);
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/// \brief Destructor
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~PatchTables() { delete _fvarPatchTables; }
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public:
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//
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// Interpolation methods
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//
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/// \brief Interpolate the (s,t) parametric location of a *bilinear* patch
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///
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/// \note This method can only be used on uniform PatchTables of quads (see
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/// IsFeatureAdaptive() method)
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///
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/// @param handle A patch handle indentifying the sub-patch containing the
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/// (s,t) location
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///
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/// @param s Patch coordinate (in coarse face normalized space)
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///
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/// @param t Patch coordinate (in coarse face normalized space)
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///
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/// @param src Source primvar buffer (control vertices data)
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///
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/// @param dst Destination primvar buffer (limit surface data)
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///
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template <class T, class U> void Interpolate(PatchHandle const & handle,
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float s, float t, T const & src, U * dst) const;
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/// \brief Interpolate the (s,t) parametric location of a bilinear (quad)
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/// patch
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///
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template <class T, class U> static void
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InterpolateBilinear(Index const * cvs, float s, float t,
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T const & src, U * dst);
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/// \brief Interpolate the (s,t) parametric location of a regular bicubic
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/// patch
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///
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/// @param cvs Array of 16 control vertex indices
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///
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/// @param Q Array of 16 bicubic weights for the control vertices
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///
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/// @param Qd1 Array of 16 bicubic 's' tangent weights for the control
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/// vertices
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///
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/// @param Qd2 Array of 16 bicubic 't' tangent weights for the control
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/// vertices
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///
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/// @param src Source primvar buffer (control vertices data)
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///
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/// @param dst Destination primvar buffer (limit surface data)
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///
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template <class T, class U> static void
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InterpolateRegularPatch(Index const * cvs,
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float const * Q, float const *Qd1, float const *Qd2, T const & src, U * dst);
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/// \brief Interpolate the (s,t) parametric location of a boundary bicubic
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/// patch
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///
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/// @param cvs Array of 12 control vertex indices
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///
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/// @param Q Array of 12 bicubic weights for the control vertices
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///
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/// @param Qd1 Array of 12 bicubic 's' tangent weights for the control
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/// vertices
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///
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/// @param Qd2 Array of 12 bicubic 't' tangent weights for the control
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/// vertices
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///
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/// @param src Source primvar buffer (control vertices data)
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///
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/// @param dst Destination primvar buffer (limit surface data)
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///
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template <class T, class U> static void
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InterpolateBoundaryPatch(Index const * cvs,
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float const * Q, float const *Qd1, float const *Qd2, T const & src, U * dst);
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/// \brief Interpolate the (s,t) parametric location of a corner bicubic
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/// patch
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///
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/// @param cvs Array of 9 control vertex indices
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///
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/// @param Q Array of 9 bicubic weights for the control vertices
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///
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/// @param Qd1 Array of 9 bicubic 's' tangent weights for the control
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/// vertices
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///
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/// @param Qd2 Array of 9 bicubic 't' tangent weights for the control
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/// vertices
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///
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/// @param src Source primvar buffer (control vertices data)
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///
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/// @param dst Destination primvar buffer (limit surface data)
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///
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template <class T, class U> static void
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InterpolateCornerPatch(Index const * cvs,
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float const * Q, float const *Qd1, float const *Qd2, T const & src, U * dst);
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/// \brief Interpolate the (s,t) parametric location of a *bicubic* patch
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///
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/// \note This method can only be used on feature adaptive PatchTables (ie.
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/// IsFeatureAdaptive() is false)
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///
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/// @param handle A patch handle indentifying the sub-patch containing the
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/// (s,t) location
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///
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/// @param s Patch coordinate (in coarse face normalized space)
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///
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/// @param t Patch coordinate (in coarse face normalized space)
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///
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/// @param src Source primvar buffer (control vertices data)
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///
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/// @param dst Destination primvar buffer (limit surface data)
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///
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template <class T, class U> void Limit(PatchHandle const & handle,
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float s, float t, T const & src, U * dst) const;
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private:
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friend class PatchTablesFactory;
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// Returns bi-cubic interpolation coefficients for a given (u,v) location
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// on a b-spline patch
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static void getBSplineWeightsAtUV(PatchParam::BitField bits, float s, float t,
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float point[16], float deriv1[16], float deriv2[16]);
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private:
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// Returns the array of patches of type "desc", or NULL if there aren't any in the primitive
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PatchArray * findPatchArray( Descriptor desc );
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static DescriptorVector const & getBilinearDescriptors();
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static DescriptorVector const & getAdaptiveCatmarkDescriptors();
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static DescriptorVector const & getAdaptiveLoopDescriptors();
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// Private constructor
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PatchTables( int maxvalence ) : _fvarPatchTables(0), _maxValence(maxvalence) { }
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PatchArrayVector _patchArrays; // Vector of descriptors for arrays of patches
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PTable _patches; // Indices of the control vertices of the patches
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VertexValenceTable _vertexValenceTable; // Vertex valence table (for Gregory patches)
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QuadOffsetTable _quadOffsetTable; // Quad offsets table (for Gregory patches)
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PatchParamTable _paramTable; // PatchParam bitfields (one per patch)
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FVarPatchTables const * _fvarPatchTables; // sparse face-varying patch table (one per patch)
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// highest vertex valence allowed in the mesh (used for Gregory
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// vertexValance & quadOffset tables)
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int _maxValence;
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// number of total ptex faces in quads or triangles(loop)
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int _numPtexFaces;
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};
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// Returns the number of control vertices expected for a patch of this type
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inline short
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PatchTables::Descriptor::GetNumControlVertices( PatchTables::Type type ) {
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switch (type) {
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case REGULAR : return PatchTables::GetRegularPatchSize();
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case QUADS : return 4;
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case GREGORY :
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case GREGORY_BOUNDARY : return PatchTables::GetGregoryPatchSize();
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case BOUNDARY : return PatchTables::GetBoundaryPatchSize();
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case CORNER : return PatchTables::GetCornerPatchSize();
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case TRIANGLES : return 3;
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case LINES : return 2;
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case POINTS : return 1;
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default : return -1;
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}
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}
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// Returns the number of face-varying control vertices expected for a patch of this type
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inline short
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PatchTables::Descriptor::GetNumFVarControlVertices( PatchTables::Type type ) {
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switch (type) {
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case REGULAR : // We only support bilinear interpolation for now,
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case QUADS : // so all these patches only carry 4 CVs.
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case GREGORY :
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case GREGORY_BOUNDARY :
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case BOUNDARY :
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case CORNER : return 4;
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case TRIANGLES : return 3;
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case LINES : return 2;
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case POINTS : return 1;
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default : return -1;
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}
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}
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// Allows ordering of patches by type
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inline bool
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PatchTables::Descriptor::operator < ( Descriptor const other ) const {
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return _pattern < other._pattern or ((_pattern == other._pattern) and
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(_type < other._type or ((_type == other._type) and
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(_rotation < other._rotation))));
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}
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// True if the descriptors are identical
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inline bool
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PatchTables::Descriptor::operator == ( Descriptor const other ) const {
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return _pattern == other._pattern and
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_type == other._type and
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_rotation == other._rotation;
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}
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template <class T, class U>
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inline void
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PatchTables::InterpolateBilinear(Index const * cvs, float s, float t,
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T const & src, U * dst) {
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float os = 1.0f - s,
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ot = 1.0f - t,
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Q[4] = { os*ot, s*ot, s*t, os*t },
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dQ1[4] = { t-1.0f, ot, t, -t },
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dQ2[4] = { s-1.0f, -s, s, os };
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for (int k=0; k<4; ++k) {
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dst->AddWithWeight(src[cvs[k]], Q[k], dQ1[k], dQ2[k]);
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}
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}
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template <class T, class U>
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inline void
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PatchTables::InterpolateRegularPatch(Index const * cvs,
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float const * Q, float const *Qd1, float const *Qd2,
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T const & src, U * dst) {
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//
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// v0 -- v1 -- v2 -- v3
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// |.....|.....|.....|
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// |.....|.....|.....|
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// v4 -- v5 -- v6 -- v7
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// |.....|.....|.....|
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// |.....|.....|.....|
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// v8 -- v9 -- v10-- v11
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// |.....|.....|.....|
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// |.....|.....|.....|
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// v12-- v13-- v14-- v15
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//
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for (int k=0; k<16; ++k) {
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dst->AddWithWeight(src[cvs[k]], Q[k], Qd1[k], Qd2[k]);
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}
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}
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template <class T, class U>
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inline void
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PatchTables::InterpolateBoundaryPatch(Index const * cvs,
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float const * Q, float const *Qd1, float const *Qd2,
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T const & src, U * dst) {
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// mirror the missing vertices (M)
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//
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// M0 -- M1 -- M2 -- M3 (corner)
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// | | | |
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// | | | |
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// v0 -- v1 -- v2 -- v3 M : mirrored
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// |.....|.....|.....|
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// |.....|.....|.....|
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// v4 -- v5 -- v6 -- v7 v : original Cv
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// |.....|.....|.....|
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// |.....|.....|.....|
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// v8 -- v9 -- v10-- v11
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//
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for (int k=0; k<4; ++k) { // M0 - M3
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dst->AddWithWeight(src[cvs[k]], 2.0f*Q[k], 2.0f*Qd1[k], 2.0f*Qd2[k]);
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dst->AddWithWeight(src[cvs[k+4]], -1.0f*Q[k], -1.0f*Qd1[k], -1.0f*Qd2[k]);
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}
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for (int k=0; k<12; ++k) {
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dst->AddWithWeight(src[cvs[k]], Q[k+4], Qd1[k+4], Qd2[k+4]);
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}
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}
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template <class T, class U>
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inline void
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PatchTables::InterpolateCornerPatch(Index const * cvs,
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float const * Q, float const *Qd1, float const *Qd2,
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T const & src, U * dst) {
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// mirror the missing vertices (M)
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//
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// M0 -- M1 -- M2 -- M3 (corner)
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// | | | |
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// | | | |
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// v0 -- v1 -- v2 -- M4 M : mirrored
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// |.....|.....| |
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// |.....|.....| |
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// v3.--.v4.--.v5 -- M5 v : original Cv
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// |.....|.....| |
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// |.....|.....| |
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// v6 -- v7 -- v8 -- M6
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//
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for (int k=0; k<3; ++k) { // M0 - M2
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dst->AddWithWeight(src[cvs[k ]], 2.0f*Q[k], 2.0f*Qd1[k], 2.0f*Qd2[k]);
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dst->AddWithWeight(src[cvs[k+3]], -1.0f*Q[k], -1.0f*Qd1[k], -1.0f*Qd2[k]);
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}
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for (int k=0; k<3; ++k) { // M4 - M6
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int idx = (k+1)*4 + 3;
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dst->AddWithWeight(src[cvs[k*3+2]], 2.0f*Q[idx], 2.0f*Qd1[idx], 2.0f*Qd2[idx]);
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dst->AddWithWeight(src[cvs[k*3+1]], -1.0f*Q[idx], -1.0f*Qd1[idx], -1.0f*Qd2[idx]);
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}
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// M3 = -2.v1 + 4.v2 + v4 - 2.v5
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dst->AddWithWeight(src[cvs[1]], -2.0f*Q[3], -2.0f*Qd1[3], -2.0f*Qd2[3]);
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dst->AddWithWeight(src[cvs[2]], 4.0f*Q[3], 4.0f*Qd1[3], 4.0f*Qd2[3]);
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dst->AddWithWeight(src[cvs[4]], 1.0f*Q[3], 1.0f*Qd1[3], 1.0f*Qd2[3]);
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dst->AddWithWeight(src[cvs[5]], -2.0f*Q[3], -2.0f*Qd1[3], -2.0f*Qd2[3]);
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for (int y=0; y<3; ++y) { // v0 - v8
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for (int x=0; x<3; ++x) {
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int idx = y*4+x+4;
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dst->AddWithWeight(src[cvs[y*3+x]], Q[idx], Qd1[idx], Qd2[idx]);
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}
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}
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}
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// Interpolates the limit position of a parametric location on a patch
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template <class T, class U>
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inline void
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PatchTables::Interpolate(PatchHandle const & handle, float s, float t,
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T const & src, U * dst) const {
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assert(dst and (not IsFeatureAdaptive()));
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PatchTables::PatchArray const & parray =
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_patchArrays[handle.patchArrayIdx];
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Index const * cvs =
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&_patches[parray.GetVertIndex() + handle.vertexOffset];
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PatchParam::BitField const & bits =
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_paramTable[handle.patchIdx].bitField;
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bits.Normalize(s,t);
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Type ptype = parray.GetDescriptor().GetType();
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assert(ptype==QUADS);
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dst->Clear();
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InterpolateBilinear(cvs, s, t, src, dst);
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}
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// Interpolates the limit position of a parametric location on a patch
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template <class T, class U>
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inline void
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PatchTables::Limit(PatchHandle const & handle, float s, float t,
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T const & src, U * dst) const {
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assert(dst and IsFeatureAdaptive());
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PatchTables::PatchArray const & parray =
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_patchArrays[handle.patchArrayIdx];
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Index const * cvs =
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&_patches[parray.GetVertIndex() + handle.vertexOffset];
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PatchParam::BitField const & bits =
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_paramTable[handle.patchIdx].bitField;
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bits.Normalize(s,t);
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Type ptype = parray.GetDescriptor().GetType();
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if (ptype>=REGULAR and ptype<=CORNER) {
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float Q[16], Qd1[16], Qd2[16];
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getBSplineWeightsAtUV(bits, s, t, Q, Qd1, Qd2);
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float scale = float(1 << bits.GetDepth());
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for (int k=0; k<16; ++k) {
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Qd1[k] *= scale;
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Qd2[k] *= scale;
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}
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dst->Clear();
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switch (ptype) {
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case REGULAR:
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InterpolateRegularPatch(cvs, Q, Qd1, Qd2, src, dst);
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break;
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case BOUNDARY:
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InterpolateBoundaryPatch(cvs, Q, Qd1, Qd2, src, dst);
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break;
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case CORNER:
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InterpolateCornerPatch(cvs, Q, Qd1, Qd2, src, dst);
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break;
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default:
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assert(0);
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}
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} else if (ptype>=GREGORY and ptype<=GREGORY_BOUNDARY) {
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} else {
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assert(0);
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}
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}
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} // end namespace Far
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} // end namespace OPENSUBDIV_VERSION
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using namespace OPENSUBDIV_VERSION;
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} // end namespace OpenSubdiv
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#endif /* FAR_PATCH_TABLES */
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