Mizkoeu / RayTracing

#3 Project in Computer Graphics@Budapest-AIT. Focussed on coding fragment shader in WebGL to realize realtime raytracing.

3D_Game_Graphics

Quadrics RayTracing Homework for CG Course

Introduction:

This is an exercise for quadrics geometry, procedural texture mapping, ray casting, ray tracing and experimenting with various materials such as plastic (phuong-blinn), metal (reflection + fresnel effect), glass (refraction). The gameplay and animations are secondary to the assignment (although still rather fun to play with).

List of Features Completed:

1. Chessboard: Completed, with multiple clippers (three infinite slabs) intersecting each other to make a box. The outer texture is rendered wooden with procedural noise function. The main board has checkered patterns, with diffuse shading and 20% reflection to give off the glass material feel.

2. Pawns: Completed with cone and sphere. Note: Actual number of pawns are reduced to 4 so as to improve graphics performance.

3. Bishops: Completed with a see-through hole in them, with the hole's inner wall also modeled and visible.

4. Kings: Built from clipped quadrics, including a paraboloid for the crown. Material for the king is gold with fresnel effect implemented.

5. Queens: Built from clipped quadrics, including a hyperboloid for the gown. Lace-like pattern is computed in shader to discard ray hits. The body of the Queen piece thus can be seen through with a helix shaped cut.

6. Rooks: Built using quadrics clipped by multiple (two per quadric) clippers.

7. Sun: Implemented a directional light source that contributes to the illumination of all objects with non-ideal BRDFs. Objects do cast shadows on one another.

8. Gloria: The King pieces do have (omnidirectional, isotropic) point lights over them. It's a little obscure at first, but you can move the piece using UP,DOWN,LEFT,RIGHT arrow keys to see the point light better. Appropriate shadows are cast.

9. Silver: The top/crown part of the Queen pieces are rendered as silver, with pure 100% reflection on all wavelengths.

10. Gold: The entire King pieces are rendered as gold, with proper fresnel effect implemented.

11. Ebony and Ivory (requires Sun or Gloria): The pawns and rooks are all made of plastic, with diffuse + Phuong Blinn shading (different exponents).

12. Wood (requires Chessboard): The outer part of the chessboard is made of wood, with procedural texture mapping and proper diffuse shading.

13. Normal mapping (requires 'Ebony and Ivory' or 'Silver' or 'Gold'): All the pawns have Normal Mapping with the provided noise function. They all have wavy/bumpy surfaces due to the procedural noise function that disturbs the normals.

14. Environment: Completed. Rays that do not hit any object take their radiance from an environment map texture. A semi-spherical sky mapping is implemented (singularity can be seen from the backward direction).

15. Animations: #1. The King piece from the Blue team can be moved around on the chessboard with UP,DOWN,LEFT,RIGHT arrow keys; With SPACE key, the King piece flies up in the sky. #2. The Bishops are animated too, with F going left-forward; G going right-forward; C going left-backward; B going right-backward.

16. Stretch Goals: #1. Glass refraction texture is also implemented. Please see the body of the Bishops as a reference. #2. The Glass parts of the Bishops DO NOT cast any shadow (non-shadow caster).