/// Computes the x-coordinate of a point on a cubic Bezier curve at a given parameter `t`.
///
/// # Parameters
/// - `t`: The parameter along the curve, where 0.0 represents the start of the curve
/// and 1.0 represents the end.
/// - `c0`: control point defining the curve near t = 0.
/// - `c1`: control point defining the curve near t = 1.
///
/// # Returns
/// - The x-coordinate of the point on the curve at `t`.