Mesh
Quick Summary
Mesh (3D Network) is a term describing the base skeletal framework used to form a 3D object in a programming environment. A Mesh variant includes a collection of Vertices, Edges, and Faces calculated and connected together in an XYZ coordinate system (three-dimensional space) to create the solid form of every object.
Illustration: 3D static rendering toggle interface — the source Mesh grid not yet containing shading (Texture/Shader) properties is covered into a realistic geometric structure.
In the CGI or Game Design development process, Mesh (typically manifested under the Polygon Mesh algorithm layer) is the first mathematical mold. If the surface Texture rendering is the “skin and flesh” for recognizing lighting effects — then the Mesh grid is the core framework defining virtual physical volume properties.
Algorithm Component Decomposition
The structural model of a Mesh is configured by a set of 3 positional variables:
- Vertices (Origin Points / Apex): Ultra-small coordinate points registered in 3D space. The computer calculates actual distance between characters and the environment only based on these Vector coordinate points.
- Edges (Edge Routing Lines): Straight connecting lines linking chains of Vertices together.
- Faces (Polygon Faces): Closed geometric surfaces formed when 3 or more vertices connect edges (forming Triangles or Quads). These surfaces serve to determine virtual shadow-casting barriers (Shading limits) and block physical interaction rendering through the recoil function (Collision Mesh).
Standard Applications in the Render System
Mesh density (Density) determines device memory measurement limits.
- Low-poly Mesh (Low-resolution grid): Contains a few hundred to a few thousand surfaces — economical GPU resource usage. Used primarily for distant characters (LOD — Level of Detail) or static mobile devices.
- High-poly Mesh (High-complexity grid): Models possessing millions of Vertex points — used in cinematics chains or new-generation computer graphics technology. To help Game Engines display realistic graphics without hanging the CPU, engineering systems typically map the convexity/concavity information of a High-poly Mesh onto a Low-Poly surface through the Normal Map solution.