@openhps/core/dist/esm/three/math/interpolants/QuaternionLinearInterpolant.js

Open Hybrid Positioning System - Core component

import { Interpolant } from '../Interpolant.js';
import { Quaternion } from '../Quaternion.js';

/**
 * Spherical linear unit quaternion interpolant.
 *
 * @augments Interpolant
 */
class QuaternionLinearInterpolant extends Interpolant {
  /**
   * Constructs a new SLERP interpolant.
   *
   * @param {TypedArray} parameterPositions - The parameter positions hold the interpolation factors.
   * @param {TypedArray} sampleValues - The sample values.
   * @param {number} sampleSize - The sample size
   * @param {TypedArray} [resultBuffer] - The result buffer.
   */
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
  }
  interpolate_(i1, t0, t, t1) {
    const result = this.resultBuffer,
      values = this.sampleValues,
      stride = this.valueSize,
      alpha = (t - t0) / (t1 - t0);
    let offset = i1 * stride;
    for (let end = offset + stride; offset !== end; offset += 4) {
      Quaternion.slerpFlat(result, 0, values, offset - stride, values, offset, alpha);
    }
    return result;
  }
}
export { QuaternionLinearInterpolant };