@openhps/core/dist/esm/three/nodes/utils/UVUtils.js

Open Hybrid Positioning System - Core component

import { Fn, vec2 } from '../tsl/TSLBase.js';
import { rotate } from './RotateNode.js';

/**
 * Rotates the given uv coordinates around a center point
 *
 * @tsl
 * @function
 * @param {Node<vec2>} uv - The uv coordinates.
 * @param {Node<float>} rotation - The rotation defined in radians.
 * @param {Node<vec2>} center - The center of rotation
 * @return {Node<vec2>} The rotated uv coordinates.
 */
export const rotateUV = /*@__PURE__*/Fn(([uv, rotation, center = vec2(0.5)]) => {
  return rotate(uv.sub(center), rotation).add(center);
});

/**
 * Applies a spherical warping effect to the given uv coordinates.
 *
 * @tsl
 * @function
 * @param {Node<vec2>} uv - The uv coordinates.
 * @param {Node<float>} strength - The strength of the effect.
 * @param {Node<vec2>} center - The center point
 * @return {Node<vec2>} The updated uv coordinates.
 */
export const spherizeUV = /*@__PURE__*/Fn(([uv, strength, center = vec2(0.5)]) => {
  const delta = uv.sub(center);
  const delta2 = delta.dot(delta);
  const delta4 = delta2.mul(delta2);
  const deltaOffset = delta4.mul(strength);
  return uv.add(delta.mul(deltaOffset));
});