@openhps/core
Version:
Open Hybrid Positioning System - Core component
58 lines (55 loc) • 1.84 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.equirectUV = exports.default = void 0;
var _TempNode = _interopRequireDefault(require("../core/TempNode.js"));
var _Position = require("../accessors/Position.js");
var _TSLBase = require("../tsl/TSLBase.js");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/**
* Can be used to compute texture coordinates for projecting an
* equirectangular texture onto a mesh for using it as the scene's
* background.
*
* ```js
* scene.backgroundNode = texture( equirectTexture, equirectUV() );
* ```
*
* @augments TempNode
*/
class EquirectUVNode extends _TempNode.default {
static get type() {
return 'EquirectUVNode';
}
/**
* Constructs a new equirect uv node.
*
* @param {Node<vec3>} [dirNode=positionWorldDirection] - A direction vector for sampling which is by default `positionWorldDirection`.
*/
constructor(dirNode = _Position.positionWorldDirection) {
super('vec2');
/**
* A direction vector for sampling why is by default `positionWorldDirection`.
*
* @type {Node<vec3>}
*/
this.dirNode = dirNode;
}
setup() {
const dir = this.dirNode;
const u = dir.z.atan(dir.x).mul(1 / (Math.PI * 2)).add(0.5);
const v = dir.y.clamp(-1.0, 1.0).asin().mul(1 / Math.PI).add(0.5);
return (0, _TSLBase.vec2)(u, v);
}
}
var _default = exports.default = EquirectUVNode;
/**
* TSL function for creating an equirect uv node.
*
* @tsl
* @function
* @param {?Node<vec3>} [dirNode=positionWorldDirection] - A direction vector for sampling which is by default `positionWorldDirection`.
* @returns {EquirectUVNode}
*/
const equirectUV = exports.equirectUV = /*@__PURE__*/(0, _TSLBase.nodeProxy)(EquirectUVNode).setParameterLength(0, 1);