Hans Goudey
fd414b4906
The problem was that you could getting write access to a grid from a `const Volume *` without breaking const correctness. I encountered this when working on support for volumes in the bounding box node. For geometry nodes there is an important distinction between getting data "for read" and "for write", with the former returning a `const` version of the data. Also, for volumes it was necessary to cast away const, since all of the relevant functions in `volume.cc` didn't have const versions. This patch adds `const` in these places, distinguising between "for read" and "for write" versions of functions where necessary. The downside is that loading and unloading in the global volume cache needs const write-access to some member variables. I see that as an inherent problem that comes up with caching that never has a beautiful solution anyway. Some of the const-ness could probably be propogated futher in EEVEE code, but I'll leave that out, since there is another level of caching. Differential Revision: https://developer.blender.org/D10916
77 lines
2.3 KiB
C++
77 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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#pragma once
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/** \file
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* \ingroup bke
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* \brief Volume data-block rendering and viewport drawing utilities.
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*/
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#include "BLI_sys_types.h"
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#include "DNA_volume_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct Volume;
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struct VolumeGrid;
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/* Dense Voxels */
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typedef struct DenseFloatVolumeGrid {
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VolumeGridType type;
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int resolution[3];
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float texture_to_object[4][4];
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int channels;
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float *voxels;
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} DenseFloatVolumeGrid;
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bool BKE_volume_grid_dense_floats(const struct Volume *volume,
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const struct VolumeGrid *volume_grid,
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DenseFloatVolumeGrid *r_dense_grid);
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void BKE_volume_dense_float_grid_clear(DenseFloatVolumeGrid *dense_grid);
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/* Wireframe */
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typedef void (*BKE_volume_wireframe_cb)(
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void *userdata, float (*verts)[3], int (*edges)[2], int totvert, int totedge);
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void BKE_volume_grid_wireframe(const struct Volume *volume,
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const struct VolumeGrid *volume_grid,
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BKE_volume_wireframe_cb cb,
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void *cb_userdata);
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/* Selection Surface */
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typedef void (*BKE_volume_selection_surface_cb)(
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void *userdata, float (*verts)[3], int (*tris)[3], int totvert, int tottris);
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void BKE_volume_grid_selection_surface(const struct Volume *volume,
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const struct VolumeGrid *volume_grid,
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BKE_volume_selection_surface_cb cb,
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void *cb_userdata);
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/* Render */
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float BKE_volume_density_scale(const struct Volume *volume, const float matrix[4][4]);
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#ifdef __cplusplus
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}
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#endif
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