@huukhanhnguyen/geometry / namespaces/NurbsCurve2d

namespaces/NurbsCurve2d#

axesAtParam#

const axesAtParam: (curve_json, t) => Float64Array = wasm.curve2d_axes_at_param

[originX, originY, tangentX, tangentY, normalX, normalY] — the normal is the LEFT normal, 90 degrees counter-clockwise from the tangent.

Parameters#

curve_json#

string

t#

number

Returns#

Float64Array

boundingBox#

const boundingBox: (curve_json) => Float64Array = wasm.curve2d_bounding_box

[minX, minY, maxX, maxY].

Parameters#

curve_json#

string

Returns#

Float64Array

closestPoint#

const closestPoint: (curve_json, x, y) => Float64Array = wasm.curve2d_closest_point

Parameters#

curve_json#

string

x#

number

y#

number

Returns#

Float64Array

end#

const end: (curve_json) => Float64Array = wasm.curve2d_end

Parameters#

curve_json#

string

Returns#

Float64Array

intersect#

const intersect: (a_json, b_json, tolerance) => string = wasm.curve2d_intersect

Exact curve-curve intersection of the four 2D kinds.

a_json / b_json are each a tagged curve: public flat { type: "line"|"arc"|"ellipse"|"nurbs", ... } or the nested curve2d_* envelope. Returns { crossings, overlaps } JSON.

Parameters#

a_json#

string

b_json#

string

tolerance#

number

Returns#

string

isClosed#

const isClosed: (curve_json) => boolean = wasm.curve2d_is_closed

Parameters#

curve_json#

string

Returns#

boolean

length#

const length: (curve_json) => number = wasm.curve2d_length

Parameters#

curve_json#

string

Returns#

number

lengthAt#

const lengthAt: (curve_json, t) => number = wasm.curve2d_length_at

Parameters#

curve_json#

string

t#

number

Returns#

number

paramAtLength#

const paramAtLength: (curve_json, s) => number = wasm.curve2d_param_at_length

Parameters#

curve_json#

string

s#

number

Returns#

number

pointAt#

const pointAt: (curve_json, t) => Float64Array = wasm.curve2d_point_at

Parameters#

curve_json#

string

t#

number

Returns#

Float64Array

reverse#

const reverse: (curve_json) => string = wasm.curve2d_reverse

Parameters#

curve_json#

string

Returns#

string

signedArea#

const signedArea: (curve_json) => number = wasm.curve2d_signed_area

Green's-theorem area contribution of one segment kind. Only the four ContourJson segment kinds carry one; a tagged curve of any other kind is an error rather than a silent zero.

Parameters#

curve_json#

string

Returns#

number

spline#

const spline: (points, degree) => string = wasm.curve2d_spline

Fit a NURBS of degree through points (flat [x, y, x, y, …]) and return it as a tagged nurbs curve row.

This is the door that replaces the old spline curve KIND. That kind was never a carrier — every one of its operations already delegated to this same NURBS — it was the only way to hand the kernel a 2D point list. Removing the kind without this factory would have removed the capability, so the construction moved here and the kind went away.

Parameters#

points#

Float64Array

degree#

number

Returns#

string

splitAt#

const splitAt: (curve_json, t) => string = wasm.curve2d_split_at

Both halves, as a JSON array of two Curve2dJSON.

Parameters#

curve_json#

string

t#

number

Returns#

string

start#

const start: (curve_json) => Float64Array = wasm.curve2d_start

Parameters#

curve_json#

string

Returns#

Float64Array

tangentAt#

const tangentAt: (curve_json, t) => Float64Array = wasm.curve2d_tangent_at

Parameters#

curve_json#

string

t#

number

Returns#

Float64Array

toNurbsCurve#

const toNurbsCurve: (curve_json) => string = wasm.curve2d_to_nurbs_curve

The z = 0 NurbsCurve delegate every hard operation runs through.

Parameters#

curve_json#

string

Returns#

string

transform#

const transform: (curve_json, elements) => string = wasm.curve2d_transform

Parameters#

curve_json#

string

elements#

Float64Array

Returns#

string