Hans Goudey
860f3ed794
Adds two nodes as "grid" equivalents to the existing volume nodes: - **Grid to Mesh** - **Distribute Points in Grid** The code for the latter is just duplicated for now. In a later step old node can be replaced by versioning with two new nodes. Pull Request: https://projects.blender.org/blender/blender/pulls/118830
76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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#include "BLI_span.hh"
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#include "DNA_modifier_types.h"
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#ifdef WITH_OPENVDB
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# include <openvdb/openvdb.h>
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#endif
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struct Mesh;
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namespace blender::bke {
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struct VolumeToMeshResolution {
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VolumeToMeshResolutionMode mode;
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union {
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float voxel_size;
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float voxel_amount;
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} settings;
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};
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#ifdef WITH_OPENVDB
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/**
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* The result of converting a volume grid to mesh data, in the format used by the OpenVDB API.
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*/
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struct OpenVDBMeshData {
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std::vector<openvdb::Vec3s> verts;
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std::vector<openvdb::Vec3I> tris;
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std::vector<openvdb::Vec4I> quads;
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bool is_empty() const
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{
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return verts.empty();
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}
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};
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Mesh *volume_to_mesh(const openvdb::GridBase &grid,
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const VolumeToMeshResolution &resolution,
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float threshold,
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float adaptivity);
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Mesh *volume_grid_to_mesh(const openvdb::GridBase &grid, float threshold, float adaptivity);
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/**
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* Convert an OpenVDB volume grid to corresponding mesh data: vertex positions and quad and
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* triangle indices.
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*/
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OpenVDBMeshData volume_to_mesh_data(const openvdb::GridBase &grid,
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const VolumeToMeshResolution &resolution,
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float threshold,
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float adaptivity);
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/**
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* Convert mesh data from the format provided by OpenVDB into Blender's #Mesh data structure.
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* This can be used to add mesh data from a grid into an existing mesh rather than merging multiple
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* meshes later on.
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*/
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void fill_mesh_from_openvdb_data(Span<openvdb::Vec3s> vdb_verts,
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Span<openvdb::Vec3I> vdb_tris,
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Span<openvdb::Vec4I> vdb_quads,
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int vert_offset,
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int face_offset,
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int loop_offset,
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MutableSpan<float3> vert_positions,
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MutableSpan<int> face_offsets,
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MutableSpan<int> corner_verts);
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#endif
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} // namespace blender::bke
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