GOBezierSpline

Synopsis

                    GOBezierSpline;
GOBezierSpline *    go_bezier_spline_init               (double const *x,
                                                         double const *y,
                                                         int n,
                                                         gboolean closed);
void                go_bezier_spline_destroy            (GOBezierSpline *sp);
GOPath *            go_bezier_spline_to_path            (GOBezierSpline *sp);
void                go_bezier_spline_to_cairo           (GOBezierSpline *sp,
                                                         cairo_t *cr,
                                                         gboolean horiz_flip);

Description

Details

GOBezierSpline

typedef struct {
	double *x, *y;
	int n;
	gboolean closed;
} GOBezierSpline;

go_bezier_spline_init ()

GOBezierSpline *    go_bezier_spline_init               (double const *x,
                                                         double const *y,
                                                         int n,
                                                         gboolean closed);

x and y values must be valid and finite. The returned structure contains the x and y coordinates of all control points, including the incoming data. the n and closed fields are just copies of the corresponding arguments.

`x` :	the x values
`y` :	the y values
`n` :	the number of x and y values
`closed` :	whether to return a closed curve or not
Returns :	a newly created struct GOBezierSpline instance which should be destroyed by a call to go_bezier_spline_destroy.

go_bezier_spline_destroy ()

void                go_bezier_spline_destroy            (GOBezierSpline *sp);

Destroys the given structures after cleaning all allocated fields.

sp :

a struct GOBezierSpline instance

go_bezier_spline_to_path ()

GOPath *            go_bezier_spline_to_path            (GOBezierSpline *sp);

Builds a GOPath using the control points evaluated in go_bezier_spline_init.

`sp` :	a struct GOBezierSpline instance returned by go_bezier_spline_init
Returns :	a newly created GOPath which should be destroyed by a call to go_path_free.

go_bezier_spline_to_cairo ()

void                go_bezier_spline_to_cairo           (GOBezierSpline *sp,
                                                         cairo_t *cr,
                                                         gboolean horiz_flip);

Renders the spline in \a cr

`sp` :	a struct GOBezierSpline instance returned by go_bezier_spline_init
`cr` :	a cairo context
`horiz_flip` :	whether to flip horizontally (for a RTL canvas).

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