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annotate src/curve.h @ 13:4da693339d99

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- distance from curve - hover/selection of curves directly on the curve
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 20 Dec 2015 08:22:24 +0200
parents 84a647283237
children 7f795f7fecd6
rev   line source
nuclear@0 1 #ifndef CURVE_H_
nuclear@0 2 #define CURVE_H_
nuclear@0 3
nuclear@0 4 #include <vector>
nuclear@0 5 #include <vmath/vmath.h>
nuclear@0 6
nuclear@0 7 enum CurveType {
nuclear@0 8 CURVE_LINEAR,
nuclear@0 9 CURVE_HERMITE,
nuclear@0 10 CURVE_BSPLINE
nuclear@0 11 };
nuclear@0 12
nuclear@0 13 class Curve {
nuclear@0 14 private:
nuclear@12 15 std::vector<Vector4> cp;
nuclear@0 16 CurveType type;
nuclear@0 17
nuclear@12 18 // bounding box
nuclear@12 19 mutable Vector3 bbmin, bbmax;
nuclear@12 20 mutable bool bbvalid;
nuclear@12 21
nuclear@12 22 void calc_bounds() const;
nuclear@12 23 void inval_bounds() const;
nuclear@12 24
nuclear@0 25 public:
nuclear@0 26 Curve(CurveType type = CURVE_HERMITE);
nuclear@12 27 Curve(const Vector4 *cp, int numcp, CurveType type = CURVE_HERMITE); // homogenous
nuclear@12 28 Curve(const Vector3 *cp, int numcp, CurveType type = CURVE_HERMITE); // 3D points, w=1
nuclear@12 29 Curve(const Vector2 *cp, int numcp, CurveType type = CURVE_HERMITE); // 2D points, z=0, w=1
nuclear@0 30
nuclear@0 31 void set_type(CurveType type);
nuclear@0 32 CurveType get_type() const;
nuclear@0 33
nuclear@12 34 void add_point(const Vector4 &p);
nuclear@12 35 void add_point(const Vector3 &p, float weight = 1.0f);
nuclear@0 36 void add_point(const Vector2 &p, float weight = 1.0f);
nuclear@0 37 bool remove_point(int idx);
nuclear@0 38
nuclear@12 39 void clear(); // remove all control points
nuclear@12 40 bool empty() const; // true if 0 control points
nuclear@12 41 int size() const; // returns number of control points
nuclear@12 42 // access operators for control points
nuclear@12 43 Vector4 &operator [](int idx);
nuclear@12 44 const Vector4 &operator [](int idx) const;
nuclear@12 45 const Vector4 &get_point(int idx) const;
nuclear@0 46
nuclear@12 47 Vector3 get_point3(int idx) const;
nuclear@12 48 Vector2 get_point2(int idx) const;
nuclear@0 49 float get_weight(int idx) const;
nuclear@0 50
nuclear@12 51 bool set_point(int idx, const Vector3 &p, float weight = 1.0f);
nuclear@0 52 bool set_point(int idx, const Vector2 &p, float weight = 1.0f);
nuclear@0 53 bool set_weight(int idx, float weight);
nuclear@2 54 // move point without changing its weight
nuclear@12 55 bool move_point(int idx, const Vector3 &p);
nuclear@2 56 bool move_point(int idx, const Vector2 &p);
nuclear@12 57
nuclear@12 58 int nearest_point(const Vector3 &p) const;
nuclear@12 59 // nearest control point on the 2D plane z=0
nuclear@12 60 int nearest_point(const Vector2 &p) const;
nuclear@0 61
nuclear@12 62 /* get_bbox returns the axis-aligned bounding box of the curve's
nuclear@12 63 * control points.
nuclear@12 64 * NOTE: hermite curves can go outside of the bounding box of their control points
nuclear@12 65 * NOTE: lazy calculation of bounds is performed, use calc_bbox in multithreaded programs
nuclear@12 66 */
nuclear@12 67 void get_bbox(Vector3 *bbmin, Vector3 *bbmax) const;
nuclear@12 68 void calc_bbox(Vector3 *bbmin, Vector3 *bbmax) const;
nuclear@12 69 // normalize the curve's bounds to coincide with the unit cube
nuclear@12 70 void normalize();
nuclear@12 71
nuclear@12 72 // project a point to the curve (nearest point on the curve)
nuclear@13 73 Vector3 proj_point(const Vector3 &p, float refine_thres = 0.01) const;
nuclear@13 74 // equivalent to (proj_point(p) - p).length()
nuclear@12 75 float distance(const Vector3 &p) const;
nuclear@13 76 // equivalent to fabs((proj_point(p) - p).length_sq())
nuclear@13 77 float distance_sq(const Vector3 &p) const;
nuclear@12 78
nuclear@12 79 Vector3 interpolate_segment(int a, int b, float t) const;
nuclear@12 80 Vector3 interpolate(float t) const;
nuclear@12 81 Vector2 interpolate2(float t) const;
nuclear@12 82 Vector3 operator ()(float t) const;
nuclear@0 83 };
nuclear@0 84
nuclear@0 85 #endif // CURVE_H_