Spline curves are mathematical functions used to create smooth and flexible shapes. They are often employed in computer graphics, animation, and engineering to model complex curves and surfaces. By connecting a series of control points, spline curves can produce a continuous line that passes near or through these points, allowing for precise control over the curve's shape. There are various types of spline curves, including Bézier curves and B-splines. Each type has its own properties and applications, making them suitable for different tasks in design and modeling. Spline curves are essential tools in fields like CAD (Computer-Aided Design) and CGI (Computer-Generated Imagery).