3D to 2D Wireframe Projection

A Python implementation for visualizing and interacting with 3D objects using 2D graphics.

Overview

This project implements a 3D wireframe viewer that renders 3D objects as wireframes using only 2D graphics primitives.

Demo

vid1.mov

vid2.mov

Features

• 3D Object Parsing: Reads 3D objects from comma-separated text files
• Wireframe Visualization: Displays objects as wireframes with vertices and edges
• Interactive Rotation: Click and drag to rotate objects
  • Horizontal movement rotates around Y-axis
  • Vertical movement rotates around X-axis
  • Diagonal movement combines both rotations
• Normalized Scaling: Objects are automatically scaled to fit optimally in the display window

Technical Implementation

• Pure 2D Graphics: Implements 3D visualization using only 2D drawing primitives
• Orthographic Projection: Projects 3D coordinates onto a 2D plane assuming infinite viewer distance
• Matrix-Based Rotation: Uses rotation matrices to avoid gimbal lock

File Format

The application accepts 3D object files in the following format:

6,8
1,1.0,0.0,0.0
2,0.0,-1.0,0.0
3,0.0,0.0,1.0
...
1,2,3
1,2,6
...

Where:

• First line: [number_of_vertices],[number_of_faces]
• Vertex lines: [vertex_id],[x],[y],[z]
• Face lines: [vertex_id1],[vertex_id2],[vertex_id3]

Usage

python part1.py object.txt  # For basic wireframe display

Requirements

• Python 3.x
• NumPy
• Tkinter (usually comes with Python)