Differential D14382 Diff 49727 source/blender/blenkernel/BKE_curves.hh

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source/blender/blenkernel/BKE_curves.hh

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mutable std::mutex nurbs_basis_cache_mutex;		mutable std::mutex nurbs_basis_cache_mutex;
mutable bool nurbs_basis_cache_dirty = true;		mutable bool nurbs_basis_cache_dirty = true;

/** Cache of evaluated positions. */		/** Cache of evaluated positions. */
mutable Vector<float3> evaluated_position_cache;		mutable Vector<float3> evaluated_position_cache;
mutable std::mutex position_cache_mutex;		mutable std::mutex position_cache_mutex;
mutable bool position_cache_dirty = true;		mutable bool position_cache_dirty = true;

		/**
		* Cache of lengths along each evaluated curve for for each evaluated point. If a curve is
		* cyclic, it needs one more length value to correspond to the last segment, so in order to
		* make slicing this array for a curve fast, an extra float is stored for every curve.
		*/
		mutable Vector<float> evaluated_length_cache;
		mutable std::mutex length_cache_mutex;
		mutable bool length_cache_dirty = true;

/** Direction of the spline at each evaluated point. */		/** Direction of the spline at each evaluated point. */
mutable Vector<float3> evaluated_tangents_cache;		mutable Vector<float3> evaluated_tangents_cache;
mutable std::mutex tangent_cache_mutex;		mutable std::mutex tangent_cache_mutex;
mutable bool tangent_cache_dirty = true;		mutable bool tangent_cache_dirty = true;

/** Normal direction vectors for each evaluated point. */		/** Normal direction vectors for each evaluated point. */
mutable Vector<float3> evaluated_normals_cache;		mutable Vector<float3> evaluated_normals_cache;
mutable std::mutex normal_cache_mutex;		mutable std::mutex normal_cache_mutex;
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Span<int> evaluated_offsets() const;		Span<int> evaluated_offsets() const;

/** Makes sure the data described by #evaluated_offsets if necessary. */		/** Makes sure the data described by #evaluated_offsets if necessary. */
void ensure_evaluated_offsets() const;		void ensure_evaluated_offsets() const;

Span<float3> evaluated_positions() const;		Span<float3> evaluated_positions() const;

/**		/**
		* Return a cache of accumulated lengths along the curve. Each item is the length of the
		* subsequent segment, i.e. the first value is the length of the first segment rather than 0.
		* This calculation is rather trivial, and only depends on the evaluated positions. However,
		* the results are used often, and it is necessarily single threaded, so it is cached.
		JacquesLuckeUnsubmitted Done Inline Actions "necessarily single threaded [per curve]" JacquesLucke: "necessarily single threaded [per curve]"
		*/
		Span<float> evaluated_lengths_for_curve(int curve_index) const;

		/** Calculates the data described by #evaluated_lengths_for_curve if necessary. */
		void ensure_evaluated_lengths() const;

		/**
* Evaluate a generic data to the standard evaluated points of a specific curve,		* Evaluate a generic data to the standard evaluated points of a specific curve,
* defined by the resolution attribute or other factors, depending on the curve type.		* defined by the resolution attribute or other factors, depending on the curve type.
*		*
* \warning This function expects offsets to the evaluated points for each curve to be		* \warning This function expects offsets to the evaluated points for each curve to be
* calculated. That can be ensured with #ensure_evaluated_offsets.		* calculated. That can be ensured with #ensure_evaluated_offsets.
*/		*/
void interpolate_to_evaluated(int curve_index, GSpan src, GMutableSpan dst) const;		void interpolate_to_evaluated(int curve_index, GSpan src, GMutableSpan dst) const;

private:		private:
/**		/**
* Make sure the basis weights for NURBS curve's evaluated points are calculated.		* Make sure the basis weights for NURBS curve's evaluated points are calculated.
*/		*/
void ensure_nurbs_basis_cache() const;		void ensure_nurbs_basis_cache() const;

		/** Return the slice of #evaluated_length_cache that corresponds to this curve index. */
		IndexRange lengths_range_for_curve(const int curve_index) const;

/* --------------------------------------------------------------------		/* --------------------------------------------------------------------
* Operations.		* Operations.
*/		*/

public:		public:
/**		/**
* Change the number of elements. New values for existing attributes should be properly		* Change the number of elements. New values for existing attributes should be properly
* initialized afterwards.		* initialized afterwards.
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