diff options
Diffstat (limited to 'source/blender/blenkernel/intern/curve_eval.cc')
-rw-r--r-- | source/blender/blenkernel/intern/curve_eval.cc | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/curve_eval.cc b/source/blender/blenkernel/intern/curve_eval.cc index 882fdbc0ec6..86ae70399db 100644 --- a/source/blender/blenkernel/intern/curve_eval.cc +++ b/source/blender/blenkernel/intern/curve_eval.cc @@ -23,6 +23,7 @@ #include "BKE_curve.h" #include "BKE_spline.hh" +using blender::Array; using blender::float3; using blender::float4x4; using blender::Span; @@ -82,6 +83,40 @@ void CurveEval::bounds_min_max(float3 &min, float3 &max, const bool use_evaluate } } +/** + * Return the start indices for each of the curve spline's evaluated points, as if they were part + * of a flattened array. This can be used to facilitate parallelism by avoiding the need to + * accumulate an offset while doing more complex calculations. + * + * \note The result array is one longer than the spline count; the last element is the total size. + */ +blender::Array<int> CurveEval::control_point_offsets() const +{ + Array<int> offsets(splines_.size() + 1); + int offset = 0; + for (const int i : splines_.index_range()) { + offsets[i] = offset; + offset += splines_[i]->size(); + } + offsets.last() = offset; + return offsets; +} + +/** + * Exactly like #control_point_offsets, but uses the number of evaluated points instead. + */ +blender::Array<int> CurveEval::evaluated_point_offsets() const +{ + Array<int> offsets(splines_.size() + 1); + int offset = 0; + for (const int i : splines_.index_range()) { + offsets[i] = offset; + offset += splines_[i]->evaluated_points_size(); + } + offsets.last() = offset; + return offsets; +} + static BezierSpline::HandleType handle_type_from_dna_bezt(const eBezTriple_Handle dna_handle_type) { switch (dna_handle_type) { |