@openhps/core/src/three/math/interpolants/LinearInterpolant.js

Open Hybrid Positioning System - Core component

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.LinearInterpolant = void 0;
var _Interpolant = require("../Interpolant.js");
/**
 * A basic linear interpolant.
 *
 * @augments Interpolant
 */
class LinearInterpolant extends _Interpolant.Interpolant {
  /**
   * Constructs a new linear 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,
      offset1 = i1 * stride,
      offset0 = offset1 - stride,
      weight1 = (t - t0) / (t1 - t0),
      weight0 = 1 - weight1;
    for (let i = 0; i !== stride; ++i) {
      result[i] = values[offset0 + i] * weight0 + values[offset1 + i] * weight1;
    }
    return result;
  }
}
exports.LinearInterpolant = LinearInterpolant;