67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
// Copyright 2018 Blender Foundation. All rights reserved.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software Foundation,
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// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// Author: Sergey Sharybin
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#ifndef OPENSUBDIV_CONVERTER_ORIENT_IMPL_H_
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#define OPENSUBDIV_CONVERTER_ORIENT_IMPL_H_
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#include "internal/opensubdiv_converter_orient.h"
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#include <cmath>
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#include "internal/opensubdiv_util.h"
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namespace opensubdiv_capi {
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inline void reverseFaceVertices(int* face_vertices, const int num_vertices) {
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int last_vert = face_vertices[num_vertices - 1];
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for (int i = num_vertices - 1; i > 0; --i) {
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face_vertices[i] = face_vertices[i - 1];
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}
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face_vertices[0] = last_vert;
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}
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inline int getLoopWinding(int vert0_of_face, int vert1_of_face) {
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int delta_face = vert1_of_face - vert0_of_face;
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if (abs(delta_face) != 1) {
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if (delta_face > 0) {
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delta_face = -1;
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} else {
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delta_face = 1;
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}
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}
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return delta_face;
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}
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inline void reverseFaceLoops(
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OpenSubdiv::Far::IndexArray* face_vertices,
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OpenSubdiv::Far::IndexArray* face_edges) {
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const int num_face_vertices = face_vertices->size();
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for (int i = 0; i < num_face_vertices / 2; ++i) {
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const int j = num_face_vertices - i - 1;
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if (i != j) {
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swap((*face_vertices)[i], (*face_vertices)[j]);
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swap((*face_edges)[i], (*face_edges)[j]);
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}
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}
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reverseFaceVertices(&(*face_vertices)[0], num_face_vertices);
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}
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} // namespace opensubdiv_capi
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#endif // OPENSUBDIV_CONVERTER_ORIENT_IMPL_H_
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