Luna::catmull_rom

Float4 catmull_rom(const Float4 &v1, const Float4 &v2, const Float4 &vec3, const Float4 &vec4, f32 t)

Performs centripetal Catmull–Rom spline interpolation.

This function performs the following operations:

[f32](group___runtime_base_type_1gad34d88453d37b65a09797bad37f2f527.md) t2 = t * t;
[f32](group___runtime_base_type_1gad34d88453d37b65a09797bad37f2f527.md) t3 = t2 * t;
return (v1 * (-t3 + 2 * t2 - t) +
        v2 * (3 * t3 - 5 * t2 + 2) +
        v3 * (-3 * t3 + 4 * t2 + t) +
        v4 * (t3 - t2)) * 0.5;

Parameters

in v1

The first point of the curve.
in v2

The second point of the curve.
in v3

The third point of the curve.
in v4

The fourth point of the curve.
in t

The interpolation weight.

Return value

Returns the interpolation result.