Class: ArcPrimitive

Experimental

Instanced, anti-aliased annular sectors (pie / donut / gauge wedges) in a single draw call. Style-only updates (fill, borderColor, borderWidth) re-upload only that attribute; shape updates (radii, angles, pad, corners) re-upload the shape + bounds; center updates the centers.

Implements

• Primitive<ArcData>

Constructors

Constructor

new ArcPrimitive(ctx, data?): ArcPrimitive;

Experimental

Parameters

Parameter	Type
ctx	PrimitiveContext
data	Partial<ArcData>

Returns

ArcPrimitive

Properties

Property	Modifier	Type	Description
object	readonly	Mesh	Experimental The mesh to add to a scene.

Accessors

instanceCount

Get Signature

get instanceCount(): number;

Experimental

Number of wedge instances currently drawn.

Returns

number

---

ready

Get Signature

get ready(): Promise<void>;

Experimental

Resolves once the pattern (if any) is drawn: its code loads on first use.

Returns

Promise<void>

Methods

dispose()

dispose(): void;

Experimental

Release GPU resources. The primitive must not be used afterwards.

Returns

void

Implementation of

Primitive.dispose

---

setTransform()

setTransform(transform): void;

Experimental

Set the data → world transform (cheap: uniforms only, no buffer uploads).

Parameters

Parameter	Type
transform	DataTransform

Returns

void

Implementation of

Primitive.setTransform

---

setViewport()

setViewport(size): void;

Experimental

Update viewport-dependent uniforms (resolution, pixel ratio).

Parameters

Parameter	Type
size	ViewportSize

Returns

void

Implementation of

Primitive.setViewport

---

update()

update(patch): void;

Experimental

Replace or patch the primitive's data. Omitted fields keep their previous values.

Parameters

Parameter	Type
patch	Partial<ArcData>

Returns

void

Implementation of

Primitive.update