Toll Tax Collection Computer Graphics Project in OpenGL

The Toll Tax Collection Booth Simulation is a popular Computer Graphics mini-project developed using C/C++ with the GLUT/OpenGL library. The project creates a simple interactive highway environment where vehicles move through toll booths, stop at barriers, and continue once the gates are opened.

Key Project Features

• Welcome Screen: Displays the project title, student details, and basic instructions for operating the simulation.

• Dual-Lane Highway: Represents a two-way highway with separate lanes and toll booths for vehicles traveling in opposite directions.

• Interactive Barriers: Vehicles automatically stop when they reach a toll booth. The user can manually raise the barrier to allow the vehicle to pass.

• Dynamic Vehicle Control: Users can adjust vehicle speed and manage traffic using predefined keyboard controls.

• Interactive Environment: Keyboard inputs make the simulation more engaging by allowing the user to control vehicle movement and toll barriers in real time.

Overall, the project demonstrates fundamental computer graphics concepts such as 2D object drawing, animation, transformations, user interaction, and keyboard-based controls in an easy-to-understand highway toll booth simulation.

🚧 Toll Tax Collection Computer Graphics Project User Controls

Action	Left / Top Lane	Right / Bottom Lane
Open Toll Barrier	L / l	R / r
Increase Speed	Z / z	V / v

Complete Source Code Implementation

You can compile and run this full working program using CodeBlocks, Visual Studio, or a standard GCC/Clang compiler with GLUT linked.

Step-by-Step Execution Guide

To run this project seamlessly on your computer, follow these setup stages:

Setup IDE: Open CodeBlocks or your environment of choice and start a new GLUT project.
Library Linking: Ensure your compiler options are linking the required dependencies: -lglut -lGLU -lGL.
Overwrite Main File: Replace all auto-generated code inside main.cpp with the script written above.
Compile: Hit Build and Run. Tap ENTER on the welcome screen to launch into the toll layout!

 

Full Source Code 

#include 
#include 
#include 

// Global State Variables
int screenMode = 0; // 0 = Welcome Screen, 1 = Toll Simulation
float car1X = -250.0f, car2X = 250.0f; 
float speed1 = 2.0f, speed2 = 2.0f;
bool gate1Open = false, gate2Open = false;
float gate1Angle = 0.0f, gate2Angle = 0.0f;

// Utility to render text strings
void renderText(float x, float y, void* font, const char* string) {
    glRasterPos2f(x, y);
    for (int i = 0; i < strlen(string); i++) {
        glutBitmapCharacter(font, string[i]);
    }
}

// Renders the initial introduction screen
void drawWelcomeScreen() {
    glClearColor(0.1f, 0.1f, 0.2f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);

    glColor3f(1.0f, 1.0f, 1.0f);
    renderText(-120, 150, GLUT_BITMAP_HELVETICA_18, "COMPUTER GRAPHICS MINI PROJECT");
    
    glColor3f(0.4f, 1.0f, 0.4f);
    renderText(-110, 100, GLUT_BITMAP_TIMES_ROMAN_24, "TOLL COLLECTING BOOTH SIMULATION");

    glColor3f(0.9f, 0.9f, 0.3f);
    renderText(-200, 20, GLUT_BITMAP_HELVETICA_12, "CONTROLS:");
    renderText(-200, 0, GLUT_BITMAP_HELVETICA_12, "  'L' / 'l' : Open Left Gate Barrier");
    renderText(-200, -20, GLUT_BITMAP_HELVETICA_12, "  'R' / 'r' : Open Right Gate Barrier");
    renderText(-200, -40, GLUT_BITMAP_HELVETICA_12, "  'Z' / 'z' : Speed up Left Car");
    renderText(-200, -60, GLUT_BITMAP_HELVETICA_12, "  'V' / 'v' : Speed up Right Car");

    glColor3f(0.3f, 0.8f, 1.0f);
    renderText(-90, -130, GLUT_BITMAP_HELVETICA_14, "Press [ENTER] to Launch Simulation");
    
    glutSwapBuffers();
}

// Renders the main simulation scene
void drawSimulationScene() {
    glClearColor(0.2f, 0.5f, 0.2f, 1.0f); // Green background for fields
    glClear(GL_COLOR_BUFFER_BIT);

    // 1. Draw Two-Way Road Asphalt
    glColor3f(0.2f, 0.2f, 0.2f);
    glBegin(GL_QUADS);
        glVertex2f(-300, 80);
        glVertex2f(300, 80);
        glVertex2f(300, -80);
        glVertex2f(-300, -80);
    glEnd();

    // 2. Draw Yellow Center Divider Line
    glColor3f(1.0f, 1.0f, 0.0f);
    glLineWidth(3.0);
    glBegin(GL_LINES);
        glVertex2f(-300, 0);
        glVertex2f(300, 0);
    glEnd();

    // 3. Draw Toll Cabins
    // Left Cabin
    glColor3f(0.7f, 0.1f, 0.1f);
    glBegin(GL_QUADS);
        glVertex2f(-60, 120); glVertex2f(-20, 120);
        glVertex2f(-20, 80);  glVertex2f(-60, 80);
    glEnd();
    // Right Cabin
    glBegin(GL_QUADS);
        glVertex2f(20, -80);  glVertex2f(60, -80);
        glVertex2f(60, -120); glVertex2f(20, -120);
    glEnd();

    // 4. Draw Left Lane Gate Barrier
    glPushMatrix();
    glTranslatef(-20, 40, 0);
    glRotatef(gate1Angle, 0, 0, 1);
    glColor3f(1.0f, 0.5f, 0.0f);
    glLineWidth(6.0);
    glBegin(GL_LINES);
        glVertex2f(0, 0); glVertex2f(0, 40);
    glEnd();
    glPopMatrix();

    // 5. Draw Right Lane Gate Barrier
    glPushMatrix();
    glTranslatef(20, -40, 0);
    glRotatef(-gate2Angle, 0, 0, 1);
    glColor3f(1.0f, 0.5f, 0.0f);
    glLineWidth(6.0);
    glBegin(GL_LINES);
        glVertex2f(0, 0); glVertex2f(0, 40);
    glEnd();
    glPopMatrix();

    // 6. Render Car 1 (Moving Left to Right)
    glColor3f(0.1f, 0.4f, 0.8f);
    glBegin(GL_QUADS);
        glVertex2f(car1X, 60);  glVertex2f(car1X + 40, 60);
        glVertex2f(car1X + 40, 20); glVertex2f(car1X, 20);
    glEnd();

    // 7. Render Car 2 (Moving Right to Left)
    glColor3f(0.8f, 0.1f, 0.2f);
    glBegin(GL_QUADS);
        glVertex2f(car2X, -20); glVertex2f(car2X - 40, -20);
        glVertex2f(car2X - 40, -60); glVertex2f(car2X, -60);
    glEnd();

    glutSwapBuffers();
}

// Master display routing
void display() {
    if (screenMode == 0) {
        drawWelcomeScreen();
    } else {
        drawSimulationScene();
    }
}

// Handles frame state updates and simulation arithmetic
void update(int value) {
    if (screenMode == 1) {
        // Handle Left Car Stopping / Moving Logic
        if (!gate1Open && (car1X + 40 >= -60) && (car1X < -60)) {
            car1X = -100; // Force full stop at booth entry boundary
        } else {
            car1X += speed1;
            if (car1X > 300) { // Loop back around
                car1X = -300;
                gate1Open = false;
            }
        }

        // Handle Right Car Stopping / Moving Logic
        if (!gate2Open && (car2X - 40 <= 60) && (car2X > 60)) {
            car2X = 100; // Force full stop at booth entry boundary
        } else {
            car2X -= speed2;
            if (car2X < -300) { // Loop back around
                car2X = 300;
                gate2Open = false;
            }
        }

        // Smoothly animate gate positions
        if (gate1Open && gate1Angle < 90.0f) gate1Angle += 5.0f;
        if (!gate1Open && gate1Angle > 0.0f) gate1Angle -= 5.0f;
        
        if (gate2Open && gate2Angle < 90.0f) gate2Angle += 5.0f;
        if (!gate2Open && gate2Angle > 0.0f) gate2Angle -= 5.0f;
    }

    glutPostRedisplay();
    glutTimerFunc(16, update, 0); // Roughly 60 Frames Per Second
}

// Configures coordinate projections
void reshape(int w, int h) {
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(-300, 300, -200, 200);
    glMatrixMode(GL_MODELVIEW);
}

// User Input Evaluator
void keyboard(unsigned char key, int x, int y) {
    switch (key) {
        case 13: // ENTER key
            screenMode = 1;
            break;
        case 'L': case 'l':
            gate1Open = true;
            break;
        case 'R': case 'r':
            gate2Open = true;
            break;
        case 'Z': case 'z':
            speed1 += 0.5f;
            break;
        case 'V': case 'v':
            speed2 += 0.5f;
            break;
        case 27: // ESC key
            exit(0);
            break;
    }
}

int main(int argc, char** argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
    glutInitWindowSize(800, 600);
    glutCreateWindow("OpenGL Toll Booth Simulation");
    
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutKeyboardFunc(keyboard);
    glutTimerFunc(0, update, 0);
    
    glutMainLoop();
    return 0;
}

OpenGL Python Program for Rendering Poké Ball

 

1. Render a Normal 3D Poké Ball

The Poké Ball itself is usually just a sphere mesh with:

• A red upper hemisphere
• A white lower hemisphere
• A black center band
• A circular button on the front

The geometry can be:

• A UV sphere
• An icosphere
• A procedurally generated sphere

The fragment shader might assign colors based on position:

if (worldPos.y > 0.0)
    color = vec3(1.0, 0.0, 0.0); // red
else
    color = vec3(1.0);            // white

The black band can be created using latitude calculations or a separate mesh.

---

2. Use Low-Resolution Rendering

A common pixel-art trick is rendering to a small framebuffer first.

For example:

320 x 180

instead of:

1920 x 1080

The scene is rendered into an off-screen texture (FBO).

Then that texture is stretched to the screen using:

GL_NEAREST

filtering.

This creates large visible pixels.

glTexParameteri(
    GL_TEXTURE_2D,
    GL_TEXTURE_MIN_FILTER,
    GL_NEAREST
);

---

3. Quantized Lighting

Instead of smooth lighting:

float diffuse = max(dot(N, L), 0.0);

you reduce it to a few discrete levels.

Example:

float diffuse = max(dot(N, L), 0.0);

diffuse = floor(diffuse * 4.0) / 4.0;

This produces only 4 brightness levels.

Result:

• Bright region
• Mid-bright
• Mid-dark
• Dark

Very similar to retro sprite shading.

---

4. Palette Reduction

Pixel-art renderers often limit colors intentionally.

Example:

vec3 color = baseColor * diffuse;

color = floor(color * 8.0) / 8.0;

This converts continuous colors into a small palette.

Instead of thousands of shades, you might have:

• 8 reds
• 8 grays
• 8 blacks

giving a classic pixel-art appearance.

---

5. Pixel Grid Snapping

Many projects quantize screen coordinates.

Example:

vec2 pixelSize = vec2(4.0);

vec2 snappedUV =
    floor(gl_FragCoord.xy / pixelSize)
    * pixelSize;

All fragments within a block sample the same value.

This creates chunky pixels even when rendering at higher resolutions.

---

6. Dithering

To fake additional colors, retro-style renderers often use dithering.

Common patterns:

Bayer Matrix

0  8  2 10
12 4 14 6
3 11 1  9
15 7 13 5

Shader:

if(diffuse < threshold)
    color *= 0.8;

This creates the checkerboard patterns often seen in pixel art.

---

7. Outline Rendering

Many stylized renders add outlines.

Two common methods:

Inverted Hull

Render the model twice:

1. Normal render
2. Render enlarged backfaces in black

position += normal * 0.02;

Produces a cartoon outline.

Edge Detection

Run a post-process pass using:

• Depth buffer
• Normal buffer

Detect sharp changes and draw black edges.

---

8. Shadow Quantization

If the image has sharp, stylized shadows, they may use toon shading:

if(diffuse > 0.7)
    shade = 1.0;
else if(diffuse > 0.4)
    shade = 0.7;
else
    shade = 0.3;

Instead of smooth gradients, you get discrete shadow bands.

---

9. Specular Highlights

The shiny white highlight on the Poké Ball can be stylized:

float spec =
    pow(max(dot(R, V), 0.0), 32.0);

spec = step(0.5, spec);

Using step() creates a hard-edged highlight instead of a realistic glossy reflection.

---

10. Typical Rendering Pipeline

A common pipeline would be:

Sphere Mesh
      ↓
Vertex Shader
      ↓
Toon Lighting
      ↓
Palette Reduction
      ↓
Render to Low-Res FBO
      ↓
Nearest Neighbor Upscaling
      ↓
Dithering Pass
      ↓
Display

The characteristic "3D object that looks like pixel art" usually comes primarily from:

1. Rendering to a very low-resolution framebuffer
2. Nearest-neighbor upscaling
3. Quantized (toon) lighting
4. Palette reduction
5. Optional dithering and outlines

Those five techniques together can make a smooth 3D OpenGL model look remarkably similar to hand-drawn pixel art while still being fully real-time and rotatable.

It can be generate via below mentioned stacks - 

PyOpenGL + GLFW (closest to modern OpenGL tutorials)

PyOpenGL + Pygame

moderngl (cleaner Python API, often easier)

Pyglet

Ursina (higher-level engine)

Python Project

Google Doc File • 7 KB

Download

Artificial intelligence and OpenGL

 

Artificial intelligence and OpenGL work together to create graphics and interactive systems. OpenGL is a graphics tool that lets programs draw pictures by talking to the computers graphics card. Artificial intelligence adds intelligence by generating pictures improving how things are drawn and driving behavior in time.

For someone who just graduated there are some examples. Artificial intelligence can generate textures, meshes and environments. This means you do not have to make every picture by hand. Artificial intelligence can produce high-quality textures. Suggest simpler meshes that still look good but are easier to make. When it comes to drawing pictures artificial intelligence techniques like denoising and superresolution help make clean pictures faster. Artificial intelligence removes noise from pictures. Makes them bigger and OpenGL shows the final picture efficiently.

Artificial intelligence also makes things more interactive. It can teach characters to move naturally in scenes that follow physics rules. Artificial intelligence can also create motion without needing to set lots of key frames. On the performance side artificial intelligence can predict which objects need to look really detailed and which can be simpler. This helps programs run smoothly on computers that're not very powerful.

As someone who's new to this field you should focus on learning the basics of OpenGL, such as shaders, buffers and textures. You should also study how artificial intelligence is used in real-world applications like using neural networks for pictures and small models for real-time use. Some challenges you might face include managing latency and memory for models and making sure the artificial intelligence output looks the way you want it to. If you master both OpenGL and artificial intelligence you can have a career, in game engines, simulation and real-time graphics tools.

Advances in graphics and artificial intelligence (AI) are changing many parts of our lives—from how cars learn to drive, to how doctors see inside the body, to the games we play. OpenGL-style graphics APIs and modern GPU-based rendering create realistic visual worlds, while AI analyzes those visuals to make decisions, find patterns, or create new content. Below are five important ways these two technologies collaborate in the real world.

Self-Driving Car Simulation

Self-driving cars need huge amounts of visual experience to learn safe driving. Companies such as NVIDIA use GPU rendering similar to OpenGL to generate realistic 3D scenes that include roads, traffic, lighting, pedestrians, and weather. These simulated environments give AI systems—using computer vision and reinforcement learning—safe and repeatable places to practice. From these training sessions, AI learns tasks like lane detection, recognizing pedestrians, and understanding traffic signs. Key technologies behind this work include OpenGL or Vulkan for rendering, neural networks for perception and decision-making, and GPU acceleration tools such as CUDA and TensorRT for fast model training and inference.

AI-Powered Medical Imaging

Medical teams use powerful graphics and AI to improve diagnosis and planning. OpenGL-style rendering helps visualize MRI and CT scans as interactive 3D views of organs and tissues, making it easier for doctors to explore inside the body. AI analyzes those images to detect tumors, fractures, or other abnormalities automatically. Together, these tools support cancer detection, surgical planning, and organ reconstruction. Major companies working in this area include Siemens Healthineers and GE HealthCare, which combine advanced visualization with AI-driven image analysis.

Modern Video Games

Video games blend rendering and AI to create immersive, believable worlds. Graphics APIs render environments, shadows, particles, and animations, while AI controls non-player characters (NPCs), plans enemy tactics, generates landscapes procedurally, and improves visuals through real-time upscaling. This combination creates smarter enemies, AI-generated terrain, and better real-time lighting or ray-reconstruction effects. Popular engines and games that use these ideas include Unity, Unreal Engine, and titles like Minecraft that demonstrate procedural generation and AI-driven behaviors.

AI + OpenGL in Robotics

Robots must perceive and navigate complex spaces. OpenGL-style rendering is used to build virtual training environments where AI vision systems learn tasks such as navigation, object detection, and motion planning. Simulated practice helps robots prepare for real-world jobs like warehouse picking, drone navigation, and industrial automation without risking hardware. Companies such as Boston Dynamics and Open Robotics develop robotic systems that rely on simulation and AI to improve reliability and safety.

AI Face Filters & Augmented Reality Applications

Augmented reality (AR) apps combine graphics with AI to create fun and useful effects on mobile devices. OpenGL ES renders masks, makeup, and other visual effects in real time, while AI tracks facial landmarks and expressions to place those effects accurately. These systems power features like face filters, virtual makeup, AR gaming, and motion capture in apps such as Instagram and Snapchat, enabling smooth, responsive visuals that react to users’ movements.

Conclusion

OpenGL-style graphics and AI form a powerful partnership: rendering produces realistic visuals and simulations, while AI interprets or enhances those visuals to perform tasks, make decisions, or create new content. Together, they accelerate innovation in autonomous vehicles, healthcare, gaming, robotics, and augmented reality—fields that students interested in computer graphics, machine learning, or robotics might consider exploring.

Animated University Campus Using OpenGL GLUT

Animated University Campus Using OpenGL & C++

Learn Computer Graphics by Building a Real Animated Campus Scene

Project Introduction

Computer Graphics is one of the most exciting areas of programming because it allows us to create visual worlds using code. In this project, we developed a fully animated university campus scene using OpenGL with GLUT in C++. The project demonstrates how basic graphics primitives such as polygons, circles, and lines can be combined to create an interactive animated environment.

Project Overview

In this project, we created a fully animated university campus using OpenGL with GLUT in C++.

The scene includes buildings, football ground, moving vehicles, animated students, birds, rain effects, day/night mode, and several interactive graphics features.

Features Included

The campus simulation includes:

• A large university building
• Football Ground with Goal Posts
• Animated Students
• Moving Cars and Buses
• Flying Airplane
• Rain Effect
• Day and Night Mode
• Animated White Flag
• Trees and park area
• University Gate
• Fountain Animation
• Birds and Clouds
• User interaction using keyboard controls

This project is ideal for beginners who want to learn:

• OpenGL fundamentals
• 2D graphics drawing
• Animation techniques
• Event handling
• User interaction
• Real-time rendering

Technologies Used

C++

OpenGL

GLUT (OpenGL Utility Toolkit)

Understanding the Graphics Concepts

1. Drawing Shapes

OpenGL uses vertices to create graphics objects. Rectangles, polygons, and circles are combined to create buildings, roads, vehicles, and trees.

glBegin(GL_QUADS);

glVertex2f(x,y);
glVertex2f(x+80,y);
glVertex2f(x+80,y+25);
glVertex2f(x,y+25);

glEnd();

2. Animation

Animation is achieved by updating object positions continuously using timer functions.

planeMove += 1.5f;
carMove += 2.0f;

glutTimerFunc(16, update, 0);

3. Interactive Controls

Keyboard controls allow users to interact with the scene.

case 'n':
    nightMode = !nightMode;
    break;

Keyboard Controls

Key	Action
N	Toggle Night Mode
R	Toggle Rain
B	Toggle Bus
C	Toggle Cars
P	Toggle Plane
ESC	Exit Program

Learning Outcomes

After completing this project, students will learn:

• 2D Graphics Programming
• OpenGL Rendering
• Animation Techniques
• Interactive Graphics
• Keyboard Event Handling
• Coordinate Systems
• Scene Design

Future Improvements

• 3D Buildings
• Traffic Lights
• Sound Effects
• Weather Systems
• Character Controls
• Texture Mapping
• Lighting Effects

OpenGL Project Applications

OpenGL is widely used in modern software development for:

• Game Development
• Simulation Systems
• Scientific Visualization
• Virtual Reality Applications
• CAD Software
• Animation Systems
• Educational Simulations
• Interactive User Interfaces

By building this animated campus environment, students gain practical understanding of how real-world graphics applications are developed.

Conclusion

This OpenGL campus simulation project is a great way to learn computer graphics through practical implementation.

By combining shapes, animation, interaction, and rendering, students can build impressive graphical applications using C++.

Continue experimenting and improving the project to explore more advanced computer graphics concepts.

Best OpenGL Project for Beginners

If you are searching for a beginner-friendly OpenGL project in C++, this animated campus simulation is an excellent choice. It combines graphics rendering, animation, interaction, and scene management into one practical project.

This project is especially useful for:

• Computer Graphics Lab Projects
• University Assignments
• Final Year Projects
• OpenGL Practice
• C++ Animation Learning
• Graphics Programming Portfolio

Frequently Asked Questions (FAQ)

What is OpenGL?

OpenGL is a cross-platform graphics library used for developing 2D and 3D graphics applications.

What is GLUT?

GLUT (OpenGL Utility Toolkit) helps developers create OpenGL windows and handle user interactions like keyboard and mouse events.

Can beginners learn this project?

Yes. This project is beginner-friendly and helps students understand graphics programming step by step.

Which language is used?

The project is developed using C++ with OpenGL and GLUT.

OpenGL Campus Project Tutorial

Learn OpenGL graphics programming with practical examples, animated projects, C++ tutorials, and interactive computer graphics concepts.

Keywords: OpenGL project, computer graphics tutorial, GLUT animation, C++ graphics programming, OpenGL campus simulation, beginner OpenGL project.