CSE 410 - Computer Graphics

This repository contains solutions for the assignments of the CSE 410 - Computer Graphics course. Each assignment focuses on different aspects of computer graphics and includes OpenGL-based implementations. Below is a brief description of each assignment.

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Tech Stack

• Language: C++
• Graphics Library: OpenGL
• Windowing and Input: GLUT (OpenGL Utility Toolkit)
• Image Output: BMP format
• Development Environment: Any C++ compiler supporting OpenGL (e.g., g++ with OpenGL libraries)

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Assignment 1 - OpenGL

Overview

This assignment implements a fully controllable camera system and a gun model, followed by bubble animations. It utilizes OpenGL to achieve basic 3D transformations and interactions.

Features

1. Fully Controllable Camera

   • Control movement and rotation of the camera using keyboard keys.
   • 6 movement operations and 6 rotation operations.

2. Gun Model

   • Model a gun using basic shapes without OpenGL library functions.
   • Implement joint rotation and firing mechanics.

3. Bubble Animation

   • Simulate bubbles on a 2D plane using vector-based movement and collision handling.

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Assignment 2 - Curves

Overview

This assignment focuses on drawing and updating 2D Hermite curves. It uses control points to generate curves and allows for dynamic updates.

Features

1. Curve Drawing

   • Add control points via left-click and draw a closed 2D Hermite curve with the right-click.

2. Curve Update

   • Update existing control points and smoothly animate points along the curve.

3. Geometry Toggle

   • Toggle the display of control points and the geometry of the curve using the keyboard.

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Assignment 3 - Raster-Based Graphics Pipeline

Overview

In this assignment, we develop a simplified version of the raster-based graphics pipeline used in OpenGL. The program generates a BMP image after applying a series of transformations and projections to 3D models.

Features

1. Modeling Transformation

   • Parse scene.txt to apply scaling, rotation, and translation transformations.

2. View Transformation

   • Implement camera view transformations using a gluLookAt style approach.

3. Projection Transformation

   • Generate projection matrix and perform clipping for the scene.

4. Scan Conversion with Z-buffer

   • Apply z-buffer algorithm for rasterizing the triangles in the 3D scene and render them into a BMP image.

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Assignment 4 - Ray Tracer

Overview

This assignment involves building a ray-tracing engine to render images of 3D scenes, considering light interactions such as reflection, diffuse, and specular effects.

Features

1. OpenGL Interface

   • Draw 3D objects (sphere, pyramid, checkerboard) in an OpenGL window.

2. Ray Tracing

   • Implement ray generation from the camera and perform object intersection calculations.

3. Lighting and Shading

   • Calculate ambient, diffuse, and specular components for object shading.

4. Reflection and Recursion

   • Implement recursive ray tracing for handling reflections.

5. Spotlight and Distance-Based Light Intensity

   • Add spotlights with a cutoff angle and decrease light intensity based on distance.

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Compilation and Execution

Each assignment is implemented in C++ using OpenGL. The code is organized into separate directories for each assignment, with their respective source files.

Requirements

• OpenGL and GLUT libraries
• C++ compiler

Acknowledgments

• Institution: Bangladesh University of Engineering and Technology (BUET)
• Course: CSE 410 - Computer Graphics