SubdivisionSurfaces-Loop

Loop scheme for subdivision surfaces

Introduction

This is my course project for Geometric Modeling. This project implements subdivision surfaces by Loop scheme. It is based on "Taubin G. A signal processing approach to fair surface design[C]//Proceedings of the 22nd annual conference on Computer graphics and interactive techniques. ACM, 1995: 351-358."

The actual masks of vertex point and edge point I used in the project:

This project can only work on triangle meshes because I haven't added any function for triangulation. Besides, the model must be a closed model.

I'm sorry for I haven't added any comments into the code, because I just want to make a copy of my work on the internet just in case.

Environment

1. IDE: visual studio 2015
2. Libraries:
   • OpenGL
     • freeglut
     • glew-2.1.0
   • OpenCV 3.2.0

Instruction

1. Input file

There are some examples in obj directory. The files there are standard obj files (I just changed the postfix). Only support a specific range of obj files:

• Triangle meshes
• Only "v" and "f", any other commands will be ignored
• A closed model
• You can set vertex color in obj file, but the color will be ignored.

2. Scene roaming

• Object rotation:Move your mouse, the model will rotate around an axis. If press "shift" at the same time, the model will rotate around another axis
• Camera translation:Up or Down or Left or Right key.

3. Display mode

Press "s" to switch the mode: Mesh or Wireframe or Mesh_and_Wireframe.

4. Subdivide

Press "a" to increase the subdivision level. Press "d" to decrease the subdivision level.

Results