This project is a 3D graphics application built using Three.js and a custom scene description format called YASF (Yet Another Scene Format). The application dynamically generates 3D scenes from a JSON file that follows the YASF specification, enabling a robust and hierarchical approach to building 3D environments.

1. Scene Graph Implementation:

   • The application parses a hierarchical JSON structure to create 3D scenes.
   • Supports nodes with inheritance for transformations, materials, and shadows.

2. Lighting:

   • Directional, Point, and Spotlights are supported.
   • Lights can cast shadows based on their configuration in the JSON.

3. Primitives:

   • Supports basic primitives like rectangles, triangles, spheres, cylinders, polygons, and NURBS surfaces.
   • NURBS surfaces are dynamically generated using control points defined in the JSON.

4. Skybox:

   • Includes support for textured skyboxes with user-defined dimensions and positions.

5. Level of Detail (LOD):

   • Nodes can have LOD configurations for efficient rendering based on the camera's distance.

6. Advanced Textures:

   • Includes support for mipmaps, bump maps, and video textures.
   • Materials can be customized with emissive, specular, and diffuse properties.

7. Interactive Controls:

   • Toggle between wireframe and solid rendering modes.
   • Change light states (on/off) and shadow settings dynamically.
   • Make objects appear/disappear.

Below are some screenshots of the implemented features:

During the development of the project, the following issues were encountered:

1. NURBS Parsing:

   • Problem: Setting degree_u or degree_v to 1 caused runtime errors.
   • Solution: Adjusted the NURBS builder to handle edge cases for low-degree surfaces and ensure proper knot vector calculations.

2. Some Performance Optimization:

   • Problem: Rendering large scenes with multiple lights and high-polygon objects caused performance drops.
   • Solution: Implemented LOD for distant objects and used mipmap textures for better performance.