6883c47bb5
There are two issues revealed in the bug report: - the GPU subdivision does not support meshes with only loose geometry - the loose geometry is not subdivided For the first case, checks are added to ensure we still fill the buffers with loose geometry even if no polygons are present. For the second case, this adds `BKE_subdiv_mesh_interpolate_position_on_edge` which encapsulates the loose vertex interpolation mechanism previously found in `subdiv_mesh_vertex_of_loose_edge`. The subdivided loose geometry is stored in a new specific data structure `DRWSubdivLooseGeom` so as to not pollute `MeshExtractLooseGeom`. These structures store the corresponding coarse element data, which will be used for filling GPU buffers appropriately. Differential Revision: https://developer.blender.org/D14171
64 lines
2.3 KiB
C
64 lines
2.3 KiB
C
/*
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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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* The Original Code is Copyright (C) 2018 by Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup bke
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*/
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#pragma once
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#include "BLI_sys_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct Mesh;
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struct MEdge;
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struct Subdiv;
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typedef struct SubdivToMeshSettings {
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/* Resolution at which regular ptex (created for quad polygon) are being
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* evaluated. This defines how many vertices final mesh will have: every
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* regular ptex has resolution^2 vertices. Special (irregular, or ptex
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* created for a corner of non-quad polygon) will have resolution of
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* `resolution - 1`.
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*/
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int resolution;
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/* When true, only edges emitted from coarse ones will be displayed. */
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bool use_optimal_display;
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} SubdivToMeshSettings;
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/* Create real hi-res mesh from subdivision, all geometry is "real". */
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struct Mesh *BKE_subdiv_to_mesh(struct Subdiv *subdiv,
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const SubdivToMeshSettings *settings,
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const struct Mesh *coarse_mesh);
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/* Interpolate a position along the `coarse_edge` at the relative `u` coordinate. If `is_simple` is
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* false, this will perform a B-Spline interpolation using the edge neighbors, otherwise a linear
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* interpolation will be done base on the edge vertices. */
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void BKE_subdiv_mesh_interpolate_position_on_edge(const struct Mesh *coarse_mesh,
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const struct MEdge *coarse_edge,
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bool is_simple,
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float u,
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float pos_r[3]);
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#ifdef __cplusplus
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}
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#endif
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