Spline Modeling

Spline modeling, as with each other form, begins with the shape created, that will create the bottom of the object. As well, with each other form, the method is used to create 3D objects used within video games.

Spline modeling is one of the premier types of 3D modeling, one of the most effective, which is able to create complex curves using weighted points (referred to as vertices) on a line. This line is represented as curving, because of these weighted points. 3D modelers are able to change the visualization of the line be increasing or decreasing the weight on each of the curves.

Splines and patches modeling use these curved lines to create the appearance of the surface of the 3D model. For this reason, spline modeling methods are best when creating organic models such as people, vehicles with sleek and curved lines, and models organs which are used in medical practices.

There are two types of models that can be created using the spline modeling techniques, solid and shell. Solid 3D models and shell 3d models differ in the fact that solid models are created like a rock, and define the structure through the interior of the 3D model. Solid models are time consuming, and require additional methods when being used. On the contrary, shell models are created to represent the surface of the object, and not the volume. Most video game models use shell type of modeling, as there is no need to define the interior volume.

Spline modeling is most similar to the second type of modeling, NURBS modeling, which also uses genuinely curved lines to create 3D modesl. Using these curved lines ensures that the model will truly have a genuine appearance to its inspiration. In contrast, polygonal modeling using series of tiny lines to create the appearance of a curved line, but one of the disadvantages of this type of modeling, is that the line will never really curve, regardless of the amount of lines used to create the structure.

An Introduction to Spline Modeling

A spline is defined as a special function involving polynomials in the mathematics realm. It can also be used to describe an alternative way to figure interpolation problems, and is an easier less governed function than polynomial interpolation. For those not familiar (or interested) in mathematics, the term spline may be more familiar as it pertains to computer science.

In this field, and subfields thereof, the term spline is frequently refers to as a parametric curve. The simplicity of their construction makes them a popular choice when designing digital models and their interactive curve design allows for easy manipulation. The word “spline” is adapted from the shipbuilding term that describes the flexible tools used by draftsmen and ship builders to easily draw accurate shapes. This simple concept has proven to be a reliable tool in the world of computer science.

Splines can be used in either one dimensional, or multi-dimensional applications, and are used in a wide variety of functions. They can be used to smooth dimension, or for the interpolation of these data dimensions. Smoothing splines aid with “cleaning up the rough edges” of 3D models, and are a vital part of quality designs.

The Three Methods of Modeling

There are three types of modeling that are used to create a 3D model, these are; spline modeling, box modeling and poly modeling.

The first type of 3D modeling discovered is spline modeling. Spline modeling has also been referred to as patch modeling and allows a curve to be created with the use of two control points. These points are created in multiples to create the skeletal system of the model. This form of modeling is best for objects that are not going to be animated, as they require a lot of modifications to be suitable for the animation process. Cars, furniture and real estate models are examples of which types of models work best within the Spline modeling process. These types of models require an extensive amount of curved shapes and therefore work best with Spline modeling.

The modeling form that lies the most similar to sculpting is the technique called box modeling. It begins with a cube shaped, and details the object by removing layers or slices. Again, box models can be difficult to animate and take extended periods of time to create, and perfect. Box modeling is used for objects with hard lines such as tall, traditional buildings.

Poly modeling is also referred to as edge extrusion. It is one of the most precise techniques as it will begin with a 3D image consisting of points, which are built upon. These sets of four points are referred to as quads, and the second is attached to the first, and the third is attached to the second, and so on. The model is created from the bottom up, and can take extended periods of time but requires less adjusting than traditional modeling methods. Shell models, which contain the surface shape without an interior, can be easily created with poly modeling. The most advanced technique; poly modeling has been popularized with new technology and software.