Hans Goudey
0a6cf3ed0c
This patch includes an updated version of the raycast node that uses fields instead of attributes for inputs instead of outputs. This makes the node's UI much clearer. It should be faster too, since the evaluation system for fields provides multi-threading. The source position replaces the input geometry (since this node is evaluated in the context of a geometry like the other field nodes). Thanks to @guitargeek for an initial version of this patch. Differential Revision: https://developer.blender.org/D12638
106 lines
3.2 KiB
C++
106 lines
3.2 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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*/
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#include "FN_generic_virtual_array.hh"
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#include "BLI_float3.hh"
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#include "BKE_attribute.h"
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struct Mesh;
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namespace blender::bke {
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struct ReadAttributeLookup;
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class OutputAttribute;
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} // namespace blender::bke
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namespace blender::bke::mesh_surface_sample {
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using fn::CPPType;
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using fn::GMutableSpan;
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using fn::GSpan;
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using fn::GVArray;
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void sample_point_attribute(const Mesh &mesh,
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Span<int> looptri_indices,
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Span<float3> bary_coords,
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const GVArray &data_in,
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const IndexMask mask,
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GMutableSpan data_out);
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void sample_corner_attribute(const Mesh &mesh,
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Span<int> looptri_indices,
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Span<float3> bary_coords,
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const GVArray &data_in,
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const IndexMask mask,
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GMutableSpan data_out);
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void sample_face_attribute(const Mesh &mesh,
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Span<int> looptri_indices,
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const GVArray &data_in,
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const IndexMask mask,
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GMutableSpan data_out);
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enum class eAttributeMapMode {
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INTERPOLATED,
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NEAREST,
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};
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/**
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* A utility class that performs attribute interpolation from a source mesh.
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*
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* The interpolator is only valid as long as the mesh is valid.
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* Barycentric weights are needed when interpolating point or corner domain attributes,
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* these are computed lazily when needed and re-used.
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*/
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class MeshAttributeInterpolator {
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private:
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const Mesh *mesh_;
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const IndexMask mask_;
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const Span<float3> positions_;
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const Span<int> looptri_indices_;
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Array<float3> bary_coords_;
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Array<float3> nearest_weights_;
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public:
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MeshAttributeInterpolator(const Mesh *mesh,
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const IndexMask mask,
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const Span<float3> positions,
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const Span<int> looptri_indices);
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void sample_data(const GVArray &src,
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const AttributeDomain domain,
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const eAttributeMapMode mode,
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const GMutableSpan dst);
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void sample_attribute(const ReadAttributeLookup &src_attribute,
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OutputAttribute &dst_attribute,
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eAttributeMapMode mode);
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protected:
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Span<float3> ensure_barycentric_coords();
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Span<float3> ensure_nearest_weights();
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};
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} // namespace blender::bke::mesh_surface_sample
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