export type OptsType = {
    tension?: number,
    custom_tensions?: number[],
    num_of_segments?: number,
    invert_x_with_width?: number,
    invert_y_with_height?: number,
    hidden_point_at_start?: number[],
    hidden_point_at_end?: number[],
}

export function getCurvePoints(pts: Float64Array, opts: OptsType): Float64Array;