diff options
Diffstat (limited to 'source/blender/blenkernel/BKE_curves.hh')
| -rw-r--r-- | source/blender/blenkernel/BKE_curves.hh | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/source/blender/blenkernel/BKE_curves.hh b/source/blender/blenkernel/BKE_curves.hh index 767936e2a26..3e00dc78b74 100644 --- a/source/blender/blenkernel/BKE_curves.hh +++ b/source/blender/blenkernel/BKE_curves.hh @@ -483,6 +483,8 @@ namespace bezier { * Return true if the handles that make up a segment both have a vector type. Vector segments for * Bezier curves have special behavior because they aren't divided into many evaluated points. */ +bool segment_is_vector(const HandleType left, const HandleType right); +bool segment_is_vector(const int8_t left, const int8_t right); bool segment_is_vector(Span<int8_t> handle_types_left, Span<int8_t> handle_types_right, int segment_index); @@ -515,6 +517,35 @@ void calculate_evaluated_offsets(Span<int8_t> handle_types_left, int resolution, MutableSpan<int> evaluated_offsets); +/** See #insert. */ +struct Insertion { + float3 handle_prev; + float3 left_handle; + float3 position; + float3 right_handle; + float3 handle_next; +}; + +/** + * Compute the Bezier segment insertion for the given parameter on the segment, returning + * the position and handles of the new point and the updated existing handle positions. + * <pre> + * handle_prev handle_next + * x-----------------x + * / \ + * / x---O---x \ + * / result \ + * / \ + * O O + * point_prev point_next + * </pre> + */ +Insertion insert(const float3 &point_prev, + const float3 &handle_prev, + const float3 &handle_next, + const float3 &point_next, + float parameter); + /** * Calculate the automatically defined positions for a vector handle (#BEZIER_HANDLE_VECTOR). While * this can be calculated automatically with #calculate_auto_handles, when more context is @@ -607,6 +638,15 @@ int calculate_evaluated_num(int points_num, bool cyclic, int resolution); */ void interpolate_to_evaluated(GSpan src, bool cyclic, int resolution, GMutableSpan dst); +/** + * Evaluate the Catmull Rom curve. The size of each segment and its offset in the #dst span + * is encoded in #evaluated_offsets, with the same method as #CurvesGeometry::offsets(). + */ +void interpolate_to_evaluated(const GSpan src, + const bool cyclic, + const Span<int> evaluated_offsets, + GMutableSpan dst); + } // namespace catmull_rom /** \} */ @@ -827,6 +867,16 @@ inline bool point_is_sharp(const Span<int8_t> handle_types_left, ELEM(handle_types_right[index], BEZIER_HANDLE_VECTOR, BEZIER_HANDLE_FREE); } +inline bool segment_is_vector(const HandleType left, const HandleType right) +{ + return left == BEZIER_HANDLE_VECTOR && right == BEZIER_HANDLE_VECTOR; +} + +inline bool segment_is_vector(const int8_t left, const int8_t right) +{ + return segment_is_vector(HandleType(left), HandleType(right)); +} + inline float3 calculate_vector_handle(const float3 &point, const float3 &next_point) { return math::interpolate(point, next_point, 1.0f / 3.0f); |