UVUtils.js•1.17 kB
import { Fn, vec2 } from '../tsl/TSLBase.js';
import { rotate } from './RotateNode.js';
/** @module UVUtils **/
/**
* Rotates the given uv coordinates around a center point
*
* @method
* @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.
*
* @method
* @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 ) );
} );