Check it out -> Firetruck Hierarchical Model

Fire Truck Simulation: A Hierarchical 3D Modeling Project

Introduction

In this project, we developed an interactive 3D simulation of a fire truck, focusing on hierarchical modeling and real-time user interaction. The main goal was to create a virtual representation of a fire truck with movable components, allowing users to manipulate it through keyboard inputs and view it from different perspectives.

Hierarchical Modeling and Scene Graph

The project utilizes a hierarchical modeling approach, where each component of the fire truck is structured within a scene graph. This allows for independent transformations of elements while maintaining a logical relationship between them. Key parameters include:

• Chassis and Wheels: The wheels rotate based on vehicle movement.
• Ladder System: The ladder extends, tilts, and rotates using designated controls.
• Cabin and Storage Compartment: The truck features a detailed structure, including an interactive rear compartment.

Interaction and Visualization

Users interact with the model primarily via keyboard inputs:

• Movement Controls: The truck can move forward, backward, and rotate left or right.
• Ladder Controls: The ladder can extend, retract, tilt, and rotate.
• Camera Views: Users can switch between different projection views, including axonometric and multiple viewport configurations.
• Rendering Modes: The visualization toggles between wireframe and solid modes for better analysis of the structure.

Additional Features

Beyond the core functionalities, we implemented several extra features to enhance realism and usability:

• Siren Activation: A siren can be toggled on and off.
• Headlights and Blinkers: The truck’s front lights and blinkers can be controlled individually.
• Rear Compartment Access: Users can open the rear compartment to reveal stored firefighting equipment.

Technical Implementation

The project was implemented using JavaScript and WebGL, leveraging a scene graph structure to manage transformations and rendering efficiently. We employed matrix transformations for positioning elements dynamically, ensuring a cohesive and modular design.

Conclusion

This project successfully demonstrates the power of hierarchical modeling in real-time 3D graphics. By integrating interactive elements and realistic transformations, we created an engaging and functional fire truck simulation. Future enhancements could include physics-based animations and more detailed environmental interactions.

Stay tuned for more updates and improvements on this exciting visualization project!