PathEllipticArc.h File Reference

Builds, flattens, splits, and transforms SVG elliptical arcs held as CPath::ArcTo. More...

#include <glm/glm.hpp>
#include <vector>
#include "CPath.h"

Include dependency graph for PathEllipticArc.h:

Classes
struct	rigkit::path::EllipticArc
	SVG F.6 elliptical arc kept as CPath::ArcTo. More...

Functions
ecs::CPath::Command	rigkit::path::makeArcTo (const glm::vec2 &end, float rx, float ry, float xRotDeg, bool largeArc, bool sweep)
	Build an ArcTo command (endpoint + SVG A parameters).
void	rigkit::path::flatten (const EllipticArc &arc, float tol, std::vector< glm::vec2 > &out)
	Sample the arc (endpoint last).
void	rigkit::path::appendCubics (const EllipticArc &arc, ecs::CPath &out)
	Append CubicTo approximations (SVG F.6).
void	rigkit::path::applyLinear (ecs::CPath::Command &cmd, float a, float b, float c, float d)
	Map ellipse axes through a 2x2 (SVG matrix a,b,c,d).
bool	rigkit::path::split (const EllipticArc &arc, float t, EllipticArc &left, EllipticArc &right)
	Split at t in (0,1) along the swept angle.

Detailed Description

Builds, flattens, splits, and transforms SVG elliptical arcs held as CPath::ArcTo.

The portable .rig path schema has no arc command, so expand to cubics before saving.

Function Documentation

appendCubics()

void rigkit::path::appendCubics	(	const EllipticArc &	arc,
		ecs::CPath &	out )

Append CubicTo approximations (SVG F.6).

LineTo when a radius is zero.

applyLinear()

void rigkit::path::applyLinear	(	ecs::CPath::Command &	cmd,
		float	a,
		float	b,
		float	c,
		float	d )

Map ellipse axes through a 2x2 (SVG matrix a,b,c,d).

Flips sweep if det < 0.

Endpoints are transformed by the caller. Radii / rotation update here.

flatten()

void rigkit::path::flatten	(	const EllipticArc &	arc,
		float	tol,
		std::vector< glm::vec2 > &	out )

Sample the arc (endpoint last).

Empty when the arc collapses to a point.

split()

bool rigkit::path::split	(	const EllipticArc &	arc,
		float	t,
		EllipticArc &	left,
		EllipticArc &	right )

Split at t in (0,1) along the swept angle.

Both pieces stay ArcTo.