Bezier3D class

Class Bezier3D represents a bezier curve, represented by control points.

Parameter t is running from 0 to 1. The class is capable to calculate the curve point and the first two derivatives belonging to it.

Base classes

class ParametricLine

ParametricLine is an Interface for parametric lines.

Constructors, destructors, conversion operators

Bezier3D() defaulted

Default constructor.

Bezier3D(ParametricLine* par, QVector<QgsPoint*>* controlpoly)

Constructor, par is a pointer to the parent, controlpoly a controlpolygon.

Public functions

void add(ParametricLine* pl) override

Do not use this method, since a Bezier curve does not consist of other curves.

void calcFirstDer(float t, Vector3D* v) override

Calculates the first derivative and assigns it to v.

void calcPoint(float t, QgsPoint* p) override

Calculates the point on the curve and assigns it to p.

void calcSecDer(float t, Vector3D* v) override

Calculates the second derivative and assigns it to v.

void changeDirection() override

Changes the order of control points.

auto getControlPoint(int number) const -> const QgsPoint* override

Returns a control point.

auto getControlPoly() const -> const QVector<QgsPoint*>* override

Returns a pointer to the control polygon.

auto getDegree() const -> int override

Returns the degree of the curve.

auto getParent() const -> ParametricLine* override

Returns the parent.

void remove(int i) override

Do not use this method, since a Bezier curve does not consist of other curves.

void setControlPoly(QVector<QgsPoint*>* cp) override

Sets the control polygon.

void setParent(ParametricLine* par) override

Sets the parent.