kotlin-cesium-engine/cesium.engine/CatmullRomSpline

CatmullRomSpline

external class CatmullRomSpline(options: CatmullRomSpline.ConstructorOptions)(source)

A Catmull-Rom spline is a cubic spline where the tangent at control points, except the first and last, are computed using the previous and next control points. Catmull-Rom splines are in the class C¹.

// spline above the earth from Philadelphia to Los Angeles
const spline = new CatmullRomSpline({
    times : [ 0.0, 1.5, 3.0, 4.5, 6.0 ],
    points : [
        new Cartesian3(1235398.0, -4810983.0, 4146266.0),
        new Cartesian3(1372574.0, -5345182.0, 4606657.0),
        new Cartesian3(-757983.0, -5542796.0, 4514323.0),
        new Cartesian3(-2821260.0, -5248423.0, 4021290.0),
        new Cartesian3(-2539788.0, -4724797.0, 3620093.0)
    ]
});

const p0 = spline.evaluate(times[i]);         // equal to positions[i]
const p1 = spline.evaluate(times[i] + delta); // interpolated value when delta < times[i + 1] - times[i]