Built-in Geometries

@luma.gl/engine provides several built in geometry primitives (subclasses of Geometry). The generated geometry instances will have indices and POSITION, NORMAL and TEXCOORD_0 attributes.

ConeGeometry

Create a ConeGeometry of base radius 2 and height 3.

import {ConeGeometry} from '@luma.gl/engine';
const cone = new ConeGeometry({
  radius: 2,
  height: 3,
  cap: true
});

constructor(props : Object)

• props.radius (number): The radius of the base of the cone.
• props.cap=false (boolean, optional): Whether to put the cap on the base of the cone.
• props.nradial=10 (number): Number of vertices used to create the disk for a given height.
• props.nvertical=10 (number): Number of vertices for the height.

CubeGeometry

import {CubeGeometry} from '@luma.gl/engine';
const cube = new CubeGeometry();

CylinderGeometry

Create a CylinderGeometry of radius 2 and height 3.

import {CylinderGeometry} from '@luma.gl/engine';
const cylinder = new CylinderGeometry({
  radius: 2,
  height: 3
});

constructor(props : Object)

• props.height= - (number) The height of the cylinder.
• props.radius= - (number) The radius of the cylinder.
• props.nradial=10 - (number) The number of vertices for the disk.
• props.nvertical=10 - (number) The number of vertices for the height.
• props.verticalAxis=y - (string) The axis along which the height is measured. One of x, y, z.
• props.topCap=false - (boolean) Whether to put the cap on the top of the cylinder.
• props.bottomCap=false - (boolean) Whether to put the cap on the bottom part of the cylinder.

IcoSphereGeometry

Create an IcoSphereGeometry of radius 1

import {IcoSphereGeometry} from '@luma.gl/engine';
const sphere = new IcoSphereGeometry({
  iterations: 1
});

constructor(props : Object)

• props.iterations=0 - (number) The number of iterations used to subdivide the Icosahedron.

PlaneGeometry

Create a XZ plane.

import {PlaneGeometry} from '@luma.gl/engine';
const plane = new PlaneGeometry({
  type: 'x,z',
  xlen: 10,
  zlen: 20,
  nx: 5,
  nz: 5,
  offset: 0
});

constructor(props : Object)

• props.type - (string) Whether is a XY, YZ or XZ plane. Possible values are x,y, x,z, y,z.
• props.xlen - (number) The length along the x-axis. Only used in x,z or x,y planes.
• props.ylen - (number) The length along the y-axis. Only used in y,z or x,y planes.
• props.zlen - (number) The length along the z-axis. Only used in x,z or y,z planes.
• props.nx - (number) The number of subdivisions along the x-axis. Only used in x,z or x,y planes.
• props.ny - (number) The number of subdivisions along the y-axis. Only used in y,z or x,y planes.
• props.nz - (number) The number of subdivisions along the z-axis. Only used in x,z or y,z planes.
• props.offset - (number) For XZ planes, the offset along the y-axis. For XY planes, the offset along the z-axis. For YZ planes, the offset along the x-axis.

SphereGeometry

import {SphereGeometry} from '@luma.gl/engine';
const sphere = new SphereGeometry({
  radius: 2
});

constructor(props : Object)

• props.nlat=10 - (number, optional) The number of vertices for latitude.
• props.nlong=10 - (number, optional) The number of vertices for longitude.
• props.radius=1 - (number, optional) The radius of the sphere.