Simple Paint Application Gaming Project in C++

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8 months ago

#include <SFML/Graphics.hpp>
#include <vector>

using namespace sf;

// Function to handle drawing on the window
void drawOnWindow(RenderWindow& window, const std::vector<CircleShape>& points) {
    window.clear(Color::White);
    for (const auto& point : points) {
        window.draw(point);
    }
    window.display();
}

int main() {
    RenderWindow window(VideoMode(800, 600), "Simple Paint Application");
    std::vector<CircleShape> points;
    bool drawing = false;

    while (window.isOpen()) {
        Event event;
        while (window.pollEvent(event)) {
            if (event.type == Event::Closed) {
                window.close();
            }
        }

        if (Mouse::isButtonPressed(Mouse::Left)) {
            if (!drawing) {
                drawing = true;
                Vector2i mousePos = Mouse::getPosition(window);
                CircleShape point(5); // Radius of 5 pixels
                point.setFillColor(Color::Black);
                point.setPosition(static_cast<float>(mousePos.x - 5), static_cast<float>(mousePos.y - 5));
                points.push_back(point);
            }
        } else {
            drawing = false;
        }

        drawOnWindow(window, points);
    }

    return 0;
}

#include <SFML/Graphics.hpp>

#include <vector>

using namespace sf;

// Function to handle drawing on the window

void drawOnWindow(RenderWindow& window, const std::vector<CircleShape>& points) {

window.clear(Color::White);

for (const auto& point : points) {

window.draw(point);

}

window.display();

}

int main() {

RenderWindow window(VideoMode(800, 600), "Simple Paint Application");

std::vector<CircleShape> points;

bool drawing = false;

while (window.isOpen()) {

Event event;

while (window.pollEvent(event)) {

if (event.type == Event::Closed) {

window.close();

}

if (Mouse::isButtonPressed(Mouse::Left)) {

if (!drawing) {

drawing = true;

Vector2i mousePos = Mouse::getPosition(window);

CircleShape point(5); // Radius of 5 pixels

point.setFillColor(Color::Black);

point.setPosition(static_cast<float>(mousePos.x - 5), static_cast<float>(mousePos.y - 5));

points.push_back(point);

}

} else {

drawing = false;

}

drawOnWindow(window, points);

}

return 0;

}

Explanation

Dependencies:
- This program uses the SFML library for creating the graphical user interface (GUI). Ensure SFML
  
  is installed and properly linked in your project.
Drawing Function:
- drawOnWindow(RenderWindow& window, const std::vector<CircleShape>& points): Clears the window and draws all circles (points) stored in the points vector.
  - Parameters:
    - window: The SFML window where drawing occurs.
    - points: A vector of CircleShape
      
      objects representing the points drawn on the window.
Main Function:
- Initialization: Sets up the SFML window with a size of 800×600 pixels and the title “Simple Paint Application”.
- Event Handling:
  - Closes the window when the close event is triggered.
- Drawing Logic:
  - Checks if the left mouse button is pressed (Mouse::isButtonPressed(Mouse::Left)).
  - If the button is pressed and not currently drawing (drawing flag), it creates a new CircleShape to represent a point and adds it to the points vector.
  - The position of the circle is set to the mouse position minus the radius to center the circle on the cursor.
  - If the mouse button is not pressed, the drawing
    
    flag is set to false.
- Drawing on Window: Continuously calls drawOnWindow() to render all points in the window.

Notes:

This program allows users to draw on the window by clicking and dragging the mouse. Each click creates a small black circle at the cursor position.
For more advanced features, such as color selection or line thickness, you would need to add additional UI elements and logic.

Explanation

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