This repository contains lab assignments and implementations for the Computer Graphics course.
IOE - Purwanchal Campus

⚠️ Notes for Working with Turbo C++

If you're using Turbo C++ (especially Turbo C++ 3.0 in DOSBox), please keep the following points in mind when running graphics programs like the Bresenham Line Algorithm and Midpoint Ellipse Algorithm:

1. Setup Requirements

• Install Turbo C++ inside C:\TURBOC3.
• Make sure the BGI graphics driver path is correct in your code, for example:

  initgraph(&gd, &gm, "C:\\TURBOC3\\BGI");

2. Use clrscr() and getch()

• Use clrscr() to clear the screen at the start of your program.
• Use getch() at the end to pause the output so the graphics window does not close immediately.

3. Use graphics.h Carefully

• Turbo C++ supports 16-color VGA graphics (640x480 resolution).
• Use predefined color constants like RED, WHITE, BLUE, etc., instead of numeric color values.

4. Avoid Modern C++ Features

• Turbo C++ does not support modern C++ features such as iostream, std::vector, or namespaces.
• Use classic C headers and syntax: stdio.h, conio.h, void main(), scanf(), etc.

5. Avoid Floating-Point Math Where Possible

• Prefer integer arithmetic to maintain compatibility and performance.
• If floating-point math is necessary, use float rather than double.

6. Use delay() for Animation Effects

• The delay(milliseconds) function helps slow down drawing steps for visual clarity.

7. Graphical Output is Pixel-Based

• Use putpixel(x, y, COLOR) to draw pixels.
• Coordinates must stay within screen limits:
  0 <= x <= 639, 0 <= y <= 479.

8. Avoid Compilation Warnings

• Declare all variables before use.
• Consistently use correct data types like int, long, and float.

9. Compatible Math Operations

• Avoid direct floating point operations in integer contexts, for example:
  (x + 0.5)*(x + 0.5)
  Instead, store in a float variable first to avoid truncation.