When using maya to make 3D, all operations appear on the object in the form of various geometric shapes and colors, but these are not real, but virtual things of the computer. What supports these virtual objects is mathematical calculation. In the process of running the software system, the user's input instructions are converted into something that can be displayed on the screen through a series of calculations, but not all the calculation processes are completed at the same time. The whole calculation process will be divided into small units, which are interrelated and independent. Each unit will complete some calculation steps to form a relatively independent task, and then hand over the calculation results to the next calculation unit for further processing. Nodes are such computing units. Nodes have input attributes and output attributes, and can complete relatively independent calculation functions.
Characteristics of nodes:
Any node is composed of three parts: input and output and intermediate calculation. Generally speaking, a node will obtain data from another node as the basis of its own calculation, then conduct internal calculation, and finally hand over the calculation results to the next node as needed. In fact, the node is like a TV set, with one end inputting radio signals and the other end outputting sounds and images. The process from radio signal to acousto-optic signal is completed inside the TV set. Although most people don't know how TV is converted, it doesn't affect our use. A node can have an input attribute or a set of input attributes. The same is true of output. ...
Role of the node:
Although quite a few people really started to contact the concept of nodes in maya in the material part, nodes are everywhere in maya. Modeling, materials, lighting, dynamics, animation and so on, there are shadows of nodes everywhere. In fact, every step in maya is aimed at a specific node. Taking the model as an example, a nerbs sphere is established, and at least three nodes will be generated in the scene; One is called' makenurbssphere', which is its creation node and records its initial creation parameters; The other is called NURBS sphere', which is its behavior node, where its spatial position relations such as displacement, rotation and scaling are recorded; The third is called' Nurbssphereshhape', which is his morphological node. It recorded its final form. It is understandable for a modeler or animator not to understand the concept of node. But it is absolutely unforgivable for a material producer not to know what a node is! Because in maya, the change of various materials depends entirely on the change of node network. If you don't have a clear understanding of nodes and node networks, you can't use them well! It is difficult to express this ever-changing world. ...
Node type:
There are more than 400 kinds of nodes in Maya. Some of the functions of these nodes are very simple, that is, they are used to complete modeling work, some are used to control animation or materials, and some are difficult to identify because the functions they can accomplish can be used to complete animation, materials or other purposes.