Messages

1

Graphics / Re: Align the text perfectly centered inside any shape

« on: May 15, 2024, 07:14:24 pm »

Many thanks for all of your replies!

2

Graphics / Re: Align the text perfectly centered inside any shape

« on: May 12, 2024, 10:01:28 am »

Thank you for bringing that to my attention. I fixed this. Now I return a reference to the sf::Text object instead. However, the problem in my algorithm is still present. Although this alignment looks good, it is not ideal. Maybe I should attach a screenshot?

3

Graphics / Align the text perfectly centered inside any shape

« on: May 11, 2024, 10:18:06 pm »

Hello everyone!

I have a set of different shapes like rectangles, circles, etc., and I need to align the text associated with each shape perfectly in the center of the shape. I wrote the following algorithm to determine offsets for the x and y axes respectively:

sf::Text text = shape.getText();
float textOffsetX = (shape.getShape()->getGlobalBounds().width - text.getGlobalBounds().width) / 2;
float textOffsetY = (shape.getShape()->getGlobalBounds().height - text.getGlobalBounds().height) / 2;
text.setPosition(shapeOffsetX + textOffsetX, shapeOffsetY + textOffsetY);

As a result, the text inside each shape is perfectly aligned horizontally but wrong vertically. Please find the screenshot in attachments. I do not know how I can put it here

My shapes are moving, so in addition to text offsets, there are also shape offsets. It does not have to matter. I have also tried two more ways, but the result is the same:
1.

sf::Text text = shape.getText();
float textOffsetX = (shape.getShape()->getGlobalBounds().width - text.getGlobalBounds().width) / 2;
auto glyph = text.getFont()->getGlyph(text.getString()[0], text.getCharacterSize(), false);
float textOffsetY = (shape.getShape()->getGlobalBounds().height - glyph.bounds.height) / 2;
text.setPosition(shapeOffsetX + textOffsetX, shapeOffsetY + textOffsetY);

2.

sf::Text text = shape.getText();
float textOffsetX = (shape.getShape()->getGlobalBounds().width - text.getGlobalBounds().width) / 2;
float textOffsetY = (shape.getShape()->getGlobalBounds().height - text.getCharacterSize()) / 2;
text.setPosition(shapeOffsetX + textOffsetX, shapeOffsetY + textOffsetY);

Could you please help me with this question?

4

Graphics / Re: Shapes are moving simultaneously instead of separately

« on: May 10, 2024, 08:46:46 pm »

Many thanks! I adjusted my code according to your advice, and it works as I want:

5

Graphics / Shapes are moving simultaneously instead of separately

« on: May 10, 2024, 03:16:44 pm »

Hello everyone!

I need my shapes to move completely independently and include collision detection. When I had only one shape, everything was okay, but when I added one more, it began behaving strangely. For some unknown reason to me, my shapes move together; it seems like they are sharing some data. I was trying to figure out what is wrong on my own, but it seems like I am stuck. If it is possible, try to give me a hint instead of a solution. Many thanks in advance.

main.cpp

#include <SFML/Graphics.hpp>
#include <iostream>
#include <cmath> // fabs
#include <vector>

int main()
{
        sf::RenderWindow window(sf::VideoMode(800, 600), "SFML Works!");

        sf::CircleShape* circle = new sf::CircleShape(100.f);
        circle->setFillColor(sf::Color::Green);
        circle->move(400.f, 0.f);

        sf::RectangleShape* rect = new sf::RectangleShape(sf::Vector2f(100, 200));
        rect->setFillColor(sf::Color::Yellow);
        rect->move(200.f, 150.f);

        std::vector<sf::Shape*> shapes;
        shapes.push_back(circle);
        shapes.push_back(rect);

        float xOffset = 0.5f;
        float yOffset = 0.5f;

        float topRightX = 0.f;
        float bottomRightY = 0.f;
        float topLeftX = 0.f;
        float topLeftY = 0.f;

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

                window.clear();

                for (auto& shape : shapes)
                {
                        if (shape)
                        {
                                if (dynamic_cast<sf::CircleShape*>(shape))
                                {
                                        sf::FloatRect boundRect = shape->getGlobalBounds();

                                        topLeftX = boundRect.getPosition().x;
                                        topLeftY = boundRect.getPosition().y;

                                        auto circle = dynamic_cast<sf::CircleShape*>(shape);
                                        topRightX = boundRect.getPosition().x + circle->getRadius() * 2.f;
                                        bottomRightY = boundRect.getPosition().y + circle->getRadius() * 2.f;
                                }
                                else if (dynamic_cast<sf::RectangleShape*>(shape))
                                {
                                        sf::FloatRect boundRect = shape->getGlobalBounds();

                                        topLeftX = boundRect.getPosition().x;
                                        topLeftY = boundRect.getPosition().y;

                                        auto rectangle = dynamic_cast<sf::RectangleShape*>(shape);
                                        topRightX = boundRect.getPosition().x + rect->getSize().x;
                                        bottomRightY = boundRect.getPosition().y + rect->getSize().y;
                                }

                                if (topRightX >= window.getSize().x - 1.f)
                                        xOffset *= -1.f;
                                else if (bottomRightY >= window.getSize().y - 1.f)
                                        yOffset *= -1.f;
                                else if (topLeftX <= 0.f)
                                        xOffset = fabs(xOffset);
                                else if (topLeftY <= 0.f)
                                        yOffset = fabs(yOffset);

                                sf::Vector2f curPos = shape->getPosition();
                                shape->setPosition(curPos.x + xOffset, curPos.y + yOffset);

                                window.draw(*shape);
                        }
                }

                window.display();
        }

        return 0;
}

Please find in attachments how it works now.