Sparagas / Triangle-Generator

Triangle-Generator

This repository contains a simple script that generates vertex indices for 3D model faces in the Wavefront .obj file format. The script can generate the indices either as a triangle list or a triangle strip.

Features

• Generates vertex indices for 3D model faces
• Supports two generation methods: Triangle list and Triangle strip
• Written in Python and C with equivalent functionality
• Precompiled C binaries for Windows (32-bit and 64-bit)
• Precompiled C binaries for Linux (32-bit and 64-bit)

Usage

Python Script

To use the Python script, follow these steps:

Windows

1. Download and install Python from python.org
2. Download tri_gen.py
3. Double-click tri_gen.py

Linux

1. Download tri_gen.py (Python is preinstalled on Linux)

2. Write this in the terminal:

   python3 tri_gen.py

Precompiled Binaries

These are compiled from tri_gen.c.

Windows

1. Download the appropriate binary for your system:

   • tri_gen_32.exe
   • tri_gen_64.exe

2. Double-click tri_gen_32.exe / tri_gen_64.exe:

Linux

1. Download the appropriate binary for your system:

   • tri_gen_32
   • tri_gen_64

2. Write this in the terminal:

   ./tri_gen_32

   ./tri_gen_64

Example Output

After entering the number of vertices, the script will generate output similar to the following:

Some 3D model formats in video games don't use vertex indices for faces.
If you want to convert these models to a more common format,
like the Wavefront .obj file, you first need to generate vertex indices.

This program generates a Wavefront .obj-compatible list of face triangles
from the entered index size, either as a triangle list or a triangle strip.

Enter number of vertices: 6

Generated as Triangle list:
f 1 2 3
f 4 5 6

Generated as Triangle strip:
f 1 2 3
f 2 3 4
f 3 4 5
f 4 5 6

Development

Why are there two identical versions written in Python and C language?

Because some people don't want to know the details or don't know what .py means and just double-click .exe programs. Others want to modify it. Python is much easier to edit because you don't have to recompile the source files. That's why I wrote the same versions in C and Python.

Python

To modify the Python script, simply edit tri_gen.py in text or code editor and run it.

C

The repository also contains an equivalent C source file. Edit tri_gen.c in text or code editor and compile it using your favorite C compiler.