Ang Lee, the Magician >> Projects >> Graphics >>STLViewer

Project 3 - Part B

Abstract

The tool reads a STL T-mesh file and turn it into corner table data structure. and display it.
Compute the volume, center of mass, shell number, genus number...etc.

Part A - Read STL file and display it. This is model (2) from partA of the project.

Links :

Part B:
(.stl) files from partA: (1) , (2)
(NOTE: After I finished partA, I found the outter shell of the STL file (1) created by IronCAD doesn't have 5 genus. So I redo it in 3ds max 7, correct it and updated it 11/07/2005)
other (.stl) files :
Single Cube, cubes, triangulated spheres, tori, spheres with a hole, single sphere. (all of above in a ZIP file)

Source code (in C++)
Excutable (interface_description)

Goal

Break-down according to the P3 instruction

Write a program that works with your corner table for computing the following: - Volume of a solid
- Center of mass .
- Number of shells .
- Genus of each shell.
Verify its correctness by applying it to simple solids (cubes, triangulated spheres, tori, spheres with a hole). Show the results. .
Apply it to the model createfd in IronCAD and compute an approximation of that model, replacing each shell with a sphere of the same volume as the one enclosed by the shell. Show the results.

Results:

Click on the picture to enlarge.

		single sube L / W / H = 50x50x50 (STL File)
		single sphere Radius = 50 (STL File)
		3 cubes (STL File)
		6 Shperes (STL File)
		3 tori (STL File)
		2 spheres with hole inside (STL File)
		My Model (1) (STL File)
		My Model (2) (STL File)

Replace Shell by spheres: