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GOBezierSpline

GOBezierSpline

Types and Values

Object Hierarchy

    GBoxed
    ╰── GOBezierSpline

Description

Functions

go_bezier_spline_destroy ()

void
go_bezier_spline_destroy (GOBezierSpline *sp);

Destroys the given structures after cleaning all allocated fields.

Parameters

sp

a struct GOBezierSpline instance

 

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.

Parameters

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_to_cairo ()

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

Renders the spline in \a cr

Parameters

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).

 

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.

Parameters

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.

Types and Values

GOBezierSpline

typedef struct {
	double *x, *y;
	int n;
	gboolean closed;
	/* private */
	unsigned ref_count;
} GOBezierSpline;

Members

double *x;

control points abscissa.

 

double *y;

control points ordinates.

 

int n;

spline segments number.

 

gboolean closed;

whether the curve is closed.

 
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