Built-in Geometries

@luma.gl/engine exports several ready-made geometry classes. All of them extend Geometry and populate standard shader attributes such as positions, normals, and texCoords.

Overview

Class	Notes
ConeGeometry	Cone with optional caps.
CubeGeometry	Unit cube geometry.
CylinderGeometry	Cylinder built on top of TruncatedConeGeometry.
IcoSphereGeometry	Icosahedron-based sphere approximation.
PlaneGeometry	Grid plane in x,y, x,z, or y,z.
SphereGeometry	Latitude/longitude sphere.
TruncatedConeGeometry	Generalized cone or frustum primitive.

Common Pattern

import {SphereGeometry} from '@luma.gl/engine';

const geometry = new SphereGeometry({radius: 2});

Selected Constructor Props

ConeGeometry

• radius?
• cap?
• Inherits radial, vertical, height, and axis options from TruncatedConeGeometry

CylinderGeometry

• radius?
• Inherits cap, radial, vertical, height, and axis options from TruncatedConeGeometry

TruncatedConeGeometry

• topRadius?
• bottomRadius?
• topCap?
• bottomCap?
• height?
• nradial?
• nvertical?
• verticalAxis?

PlaneGeometry

• type?
• xlen?, ylen?, zlen?
• nx?, ny?, nz?
• offset?

SphereGeometry

• radius?
• nlat?
• nlong?

IcoSphereGeometry

• iterations?

Remarks

• These classes are convenience wrappers around typed-array geometry generation.
• Most built-in primitives generate indexed geometry by default. CubeGeometry({indices: false}) and PlaneGeometry({unpack: true}) are non-indexed variants.
• When uploaded through Model or makeGPUGeometry(), built-in primitives are interleaved into one vertex buffer plus an optional index buffer.