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Differential D15982 Diff 57482 source/blender/nodes/geometry/nodes/node_geo_distribute_points_on_faces.cc

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source/blender/nodes/geometry/nodes/node_geo_distribute_points_on_faces.cc

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static void sample_mesh_surface(const Mesh &mesh, static void sample_mesh_surface(const Mesh &mesh,
const float base_density, const float base_density,
const Span<float> density_factors, const Span<float> density_factors,
const int seed, const int seed,
Vector<float3> &r_positions, Vector<float3> &r_positions,
Vector<float3> &r_bary_coords, Vector<float3> &r_bary_coords,
Vector<int> &r_looptri_indices) Vector<int> &r_looptri_indices)
{ {
const Span<MVert> verts = mesh.verts(); const Span<float3> positions = mesh.positions();
const Span<MLoop> loops = mesh.loops(); const Span<MLoop> loops = mesh.loops();
const Span<MLoopTri> looptris = mesh.looptris(); const Span<MLoopTri> looptris = mesh.looptris();
for (const int looptri_index : looptris.index_range()) { for (const int looptri_index : looptris.index_range()) {
const MLoopTri &looptri = looptris[looptri_index]; const MLoopTri &looptri = looptris[looptri_index];
const int v0_loop = looptri.tri[0]; const int v0_loop = looptri.tri[0];
const int v1_loop = looptri.tri[1]; const int v1_loop = looptri.tri[1];
const int v2_loop = looptri.tri[2]; const int v2_loop = looptri.tri[2];
const int v0_index = loops[v0_loop].v; const int v0_index = loops[v0_loop].v;
const int v1_index = loops[v1_loop].v; const int v1_index = loops[v1_loop].v;
const int v2_index = loops[v2_loop].v; const int v2_index = loops[v2_loop].v;
const float3 v0_pos = verts[v0_index].co; const float3 v0_pos = positions[v0_index];
const float3 v1_pos = verts[v1_index].co; const float3 v1_pos = positions[v1_index];
const float3 v2_pos = verts[v2_index].co; const float3 v2_pos = positions[v2_index];
float looptri_density_factor = 1.0f; float looptri_density_factor = 1.0f;
if (!density_factors.is_empty()) { if (!density_factors.is_empty()) {
const float v0_density_factor = std::max(0.0f, density_factors[v0_loop]); const float v0_density_factor = std::max(0.0f, density_factors[v0_loop]);
const float v1_density_factor = std::max(0.0f, density_factors[v1_loop]); const float v1_density_factor = std::max(0.0f, density_factors[v1_loop]);
const float v2_density_factor = std::max(0.0f, density_factors[v2_loop]); const float v2_density_factor = std::max(0.0f, density_factors[v2_loop]);
looptri_density_factor = (v0_density_factor + v1_density_factor + v2_density_factor) / 3.0f; looptri_density_factor = (v0_density_factor + v1_density_factor + v2_density_factor) / 3.0f;
} }
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normals = point_attributes.lookup_or_add_for_write_only_span<float3>( normals = point_attributes.lookup_or_add_for_write_only_span<float3>(
attribute_outputs.normal_id.get(), ATTR_DOMAIN_POINT); attribute_outputs.normal_id.get(), ATTR_DOMAIN_POINT);
} }
if (attribute_outputs.rotation_id) { if (attribute_outputs.rotation_id) {
rotations = point_attributes.lookup_or_add_for_write_only_span<float3>( rotations = point_attributes.lookup_or_add_for_write_only_span<float3>(
attribute_outputs.rotation_id.get(), ATTR_DOMAIN_POINT); attribute_outputs.rotation_id.get(), ATTR_DOMAIN_POINT);
} }
const Span<MVert> verts = mesh.verts(); const Span<float3> positions = mesh.positions();
const Span<MLoop> loops = mesh.loops(); const Span<MLoop> loops = mesh.loops();
const Span<MLoopTri> looptris = mesh.looptris(); const Span<MLoopTri> looptris = mesh.looptris();
for (const int i : bary_coords.index_range()) { for (const int i : bary_coords.index_range()) {
const int looptri_index = looptri_indices[i]; const int looptri_index = looptri_indices[i];
const MLoopTri &looptri = looptris[looptri_index]; const MLoopTri &looptri = looptris[looptri_index];
const float3 &bary_coord = bary_coords[i]; const float3 &bary_coord = bary_coords[i];
const int v0_index = loops[looptri.tri[0]].v; const int v0_index = loops[looptri.tri[0]].v;
const int v1_index = loops[looptri.tri[1]].v; const int v1_index = loops[looptri.tri[1]].v;
const int v2_index = loops[looptri.tri[2]].v; const int v2_index = loops[looptri.tri[2]].v;
const float3 v0_pos = verts[v0_index].co; const float3 v0_pos = positions[v0_index];
const float3 v1_pos = verts[v1_index].co; const float3 v1_pos = positions[v1_index];
const float3 v2_pos = verts[v2_index].co; const float3 v2_pos = positions[v2_index];
ids.span[i] = noise::hash(noise::hash_float(bary_coord), looptri_index); ids.span[i] = noise::hash(noise::hash_float(bary_coord), looptri_index);
float3 normal; float3 normal;
if (!normals.span.is_empty() || !rotations.span.is_empty()) { if (!normals.span.is_empty() || !rotations.span.is_empty()) {
normal_tri_v3(normal, v0_pos, v1_pos, v2_pos); normal_tri_v3(normal, v0_pos, v1_pos, v2_pos);
} }
if (!normals.span.is_empty()) { if (!normals.span.is_empty()) {
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