mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
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a1c7be7c8e
This set of commits includes the addition of a new evaluation interface that treats a subdivision mesh more like a piecewise parametric surface primitive. The new interface was placed in namespace "Bfr" for "Base Face Representation" as all concepts and classes relate to a single face of the base mesh.
123 lines
3.5 KiB
C++
123 lines
3.5 KiB
C++
//
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// Copyright 2021 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 "../bfr/vertexDescriptor.h"
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#include "../bfr/limits.h"
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#include "../sdc/crease.h"
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#include <cstring>
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#include <cstdio>
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#include <algorithm>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Bfr {
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//
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// Main initialize/finalize methods used by clients to delimit the
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// assignment (most work is now handled by the containing class):
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//
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bool
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VertexDescriptor::Initialize(int numFaces) {
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// Mark invalid if too many or too few incident faces specified:
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_isValid = (numFaces > 0) && (numFaces <= Limits::MaxValence());
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_numFaces = _isValid ? (short) numFaces : 0;
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// Initialize all other members regardless of the above:
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_vertSharpness = 0.0f;
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_isManifold = false;
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_isBoundary = false;
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_hasFaceSizes = false;
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_hasEdgeSharpness = false;
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_isInitialized = _isValid;
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_isFinalized = false;
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return _isInitialized;
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}
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bool
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VertexDescriptor::Finalize() {
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// Fail if already invalid:
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if (!_isValid) return false;
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// Test for valid face size assignments while converting the sizes
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// to offsets. Also detect if the faces are all the same size -- in
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// which case, ignore the explicit assignments:
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if (_hasFaceSizes) {
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int size0 = _faceSizeOffsets[0];
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bool sameSizes = true;
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int sum = 0;
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for (int i = 0; i < _numFaces; ++i) {
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int faceSize = _faceSizeOffsets[i];
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if ((faceSize < 3) || (faceSize > Limits::MaxFaceSize())) {
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_isValid = false;
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return false;
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}
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sameSizes &= (faceSize == size0);
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_faceSizeOffsets[i] = sum;
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sum += faceSize;
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}
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_faceSizeOffsets[_numFaces] = sum;
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// No need to make use of explicit face sizes and offsets:
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if (sameSizes) {
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_hasFaceSizes = false;
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}
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}
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_isFinalized = true;
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return true;
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}
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//
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// Internal methods for resizing local buffers:
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//
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void
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VertexDescriptor::initFaceSizes() {
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_faceSizeOffsets.SetSize(_numFaces + 1);
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std::fill(&_faceSizeOffsets[0], &_faceSizeOffsets[_numFaces + 1], 0);
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_hasFaceSizes = true;
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}
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void
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VertexDescriptor::initEdgeSharpness() {
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_faceEdgeSharpness.SetSize(_numFaces * 2);
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std::fill(&_faceEdgeSharpness[0], &_faceEdgeSharpness[_numFaces * 2], 0.0f);
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_hasEdgeSharpness = true;
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}
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} // end namespace Bfr
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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