playcanvas
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Open-source WebGL/WebGPU 3D engine for the web
42 lines (41 loc) • 1.69 kB
JavaScript
import { ConeBaseGeometry } from "./cone-base-geometry.js";
import { calculateTangents } from "./geometry-utils.js";
class CylinderGeometry extends ConeBaseGeometry {
/**
* Create a new CylinderGeometry instance.
*
* By default, the constructor creates a cylinder standing vertically centered on the XZ-plane
* with a radius of 0.5, a height of 1.0, 1 height segment and 20 cap segments. The cylinder is
* created with UVs in the range of 0 to 1.
*
* @param {object} [opts] - Options object.
* @param {number} [opts.radius] - The radius of the tube forming the body of the cylinder.
* Defaults to 0.5.
* @param {number} [opts.height] - The length of the body of the cylinder. Defaults to 1.
* @param {number} [opts.heightSegments] - The number of divisions along the length of the
* cylinder. Defaults to 5.
* @param {number} [opts.capSegments] - The number of divisions around the tubular body of the
* cylinder. Defaults to 20.
* @param {boolean} [opts.calculateTangents] - Generate tangent information. Defaults to false.
* @example
* const geometry = new pc.CylinderGeometry({
* radius: 1,
* height: 2,
* heightSegments: 2,
* capSegments: 10
* });
*/
constructor(opts = {}) {
const radius = opts.radius ?? 0.5;
const height = opts.height ?? 1;
const heightSegments = opts.heightSegments ?? 5;
const capSegments = opts.capSegments ?? 20;
super(radius, radius, height, heightSegments, capSegments, false);
if (opts.calculateTangents) {
this.tangents = calculateTangents(this.positions, this.normals, this.uvs, this.indices);
}
}
}
export {
CylinderGeometry
};