Ray Tracing

This project is an implementation of ray tracing. It renders 3D scenes described in a text file. The application uses OpenGL for real-time camera control and visualization, and it can capture the ray-traced scene to a BMP image file.

Features

• Ray-Object Intersection: Implements ray intersection logic for multiple geometric primitives:
  • Spheres
  • Triangles
  • General Quadric Surfaces
  • A checkerboard floor
• Illumination Model: Utilizes the Phong Lighting Model to calculate lighting effects, including:
  • Ambient, diffuse, and specular components.
  • Support for multiple light sources (Point Lights and Spotlights).
  • Shadow calculation by casting shadow rays towards light sources.
• Recursive Reflection: Simulates realistic reflections by recursively tracing reflected rays up to a user-defined depth.
• Texture Mapping: Supports applying image textures to the floor object, with a mechanism to toggle between the texture and the default checkerboard pattern.
• Fully Controllable Camera: A 3D camera with functionalities for movement and rotation:
  • Move: Forward, backward, left, right, up, and down.
  • Rotate: Yaw (look left/right), Pitch (look up/down), and Roll (tilt).
• Scene Capture: Renders the current camera view using ray tracing and saves it as a high-quality BMP image file.

Run

This project requires OpenGL and GLUT to run. Use run.sh to compile and run the project on linux. Make changes to input/scene.txt to modify the scene. The scene file also includes how it should be formatted. Please note that the general quadratic curve is not visible while running the program, it is only visible in the captured image.

Compiling on Windows: g++ ./src/2005049_main.cpp ./src/2005049_obj.cpp -o r.exe -lfreeglut -lglew32 -lopengl32 -lglu32

Controls

Camera Movement

Key	Action
Up Arrow	Move Forward
Down Arrow	Move Backward
Left Arrow	Move Left
Right Arrow	Move Right
Page Up	Move Up
Page Down	Move Down

Camera Rotation

Key	Action
1	Rotate Left (Yaw)
2	Rotate Right (Yaw)
3	Look Up (Pitch)
4	Look Down (Pitch)
5	Tilt Clockwise (Roll)
6	Tilt Counter-clockwise (Roll)

Application Controls

Key	Action
0	Capture Scene: Renders the current view and saves it as output_YYYYMMDD_HHMMSS.bmp.
T / t	Toggle Texture: Switches the floor rendering between the checkerboard and the loaded texture.
U / u	Update Texture: Cycles to the next available texture file (e.g., tex01.jpg, tex02.jpg).
ESC	Exit the application.

Sample Outputs