Scene Graph

Overview

Scene Graph is a Java framework built on top of JOGL that helps manage and render complex 3D scenes using a node-based architecture.

The project was designed to explore computer graphics concepts such as scene hierarchies, lighting models, transformations, animation, and texture management while extending the capabilities of the JOGL library.

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Features

• Node-based scene management
• Dynamic lighting support
• Material and texture handling
• Built-in geometric shapes
• Animated transformations
• XML-based scene configuration
• Modular and extensible architecture

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Scene Graph Architecture

The framework organizes scenes using nodes that represent different scene components.

Core Nodes

• CameraNode

  • Handles camera positioning and view management

• LightNode

  • Manages scene lighting

• MaterialNode

  • Controls surface materials and rendering properties

• TextureNode

  • Handles texture mapping

• ShapeNode

  • Represents renderable 3D objects

• TransformNode

  • Applies transformations such as translation, rotation, and scaling

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Lighting Support

The framework supports multiple lighting models:

• Directional Lights
• Point Lights
• Spot Lights

These allow more realistic rendering and dynamic scene effects.

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Animation Support

Dynamic object movement is supported through animation classes such as:

• AnimatedRotation
• AnimatedScale
• AnimatedTranslation

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Supported Shapes

The framework includes several predefined geometric objects:

• Cubes
• Spheres
• Cones
• Cylinders
• Additional primitive shapes

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Tech Stack

• Java
• JOGL (Java OpenGL)
• XML Configuration
• Object-Oriented Design
• 3D Graphics Concepts

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Installation

Requirements

• Java 8 or higher
• JOGL installed and configured

Clone the Repository

git clone https://github.com/SMFEH323/SceneGraph.git

Open the Project

Import the project into a Java IDE such as:

• IntelliJ IDEA
• Eclipse

Then configure JOGL library paths based on your system setup.

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Usage

Basic Example

public class ExampleProgram {
    public static void main(String[] args) {
        Scene scene = new Scene();

        scene.addNode(new CameraNode());
        scene.addNode(new LightNode());

        // Additional scene setup
    }
}

For XML-based scene configuration examples, see:

ExampleProgramXML.java

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Current Limitations

• Requires manual JOGL setup
• Limited advanced rendering effects
• No physics engine integration
• Basic UI and tooling support

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Future Improvements

• Add shader support
• Improve rendering performance
• Add physics simulation
• Improve scene editing tools
• Add real-time scene interaction features

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What This Project Demonstrates

• 3D graphics programming concepts
• Scene graph architecture
• OpenGL rendering with JOGL
• Object-oriented framework design
• Dynamic transformations and animations

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