Topics

1

General / Hard Coding Value of Sprite's Position

« on: June 21, 2017, 05:46:11 am »

If I hard code the value of Sprite's position, will the sprite's position change if the program is used in a different device?

I wonder if stays the same or the program will stretch the sprite depending on the size of the device.  Mostly in my code, I position all my sprite with absolute value. Is it okay to hard code the value of sprite position?
 

2

General / Swapping element in a Vector

« on: June 13, 2017, 11:36:55 am »

Can anyone point out what's wrong with my code? I tried swapping the vector's element to another element of the vector itself using std::swap(). It worked, the member class of each other have swapped but the problem is that in the left image the Blue Bar did not swap with the Red Bar.




Main.cpp

int main()
{
        unsigned int width = 800;
        unsigned int height = 600;

        sf::RenderWindow window(sf::VideoMode(width, height), "Algorithm Visualizer");

        std::vector<Bar> bars;

        for (size_t i = 0; i < 10; i++)
        {
                Bar bar(sf::Vector2f(5, i + 10), sf::Vector2f(100 + i * 10, 300));
                bars.push_back(bar);
        }

        std::cout << "Blue 1 height:  " << bars[1].getHeight() << std::endl;
        std::cout << "Blue 1 pos X:  " << bars[1].getPos().x << std::endl;
        std::cout << "Red 9 height:  " << bars[9].getHeight() << std::endl;
        std::cout << "Red 9  pos X:  " << bars[9].getPos().x << std::endl;

        bars[1].setColor(sf::Color::Blue);
        bars[9].setColor(sf::Color::Red);

        std::swap(bars[1], bars[9]);

        std::cout << "After swapping new value: " << std::endl;

        std::cout << "Blue 1 height:  " << bars[1].getHeight() << std::endl;
        std::cout << "Blue 1 pos X:  " << bars[1].getPos().x << std::endl;
        std::cout << "Red 9 height:  " << bars[9].getHeight() << std::endl;
        std::cout << "Red 9 pos X:  " << bars[9].getPos().x << std::endl;
 

Bar.cpp

Bar::Bar(sf::Vector2f size, sf::Vector2f pos)
{
        rect.setSize(size);
        rect.setOrigin(rect.getOrigin().x, size.y);
        rect.setPosition(pos);
}

Bar::~Bar()
{
}

void Bar::setColor(sf::Color color)
{
        rect.setFillColor(color);
}

void Bar::setProperty(ShapeProperty property)
{
        rect.setFillColor(property.fill_);
        rect.setOutlineColor(property.outline_);
        rect.setOutlineThickness(property.thickness_);
}

void Bar::setPosition(sf::Vector2f pos)
{
        rect.setPosition(pos);
}

void Bar::setSize(sf::Vector2f size)
{
        rect.setOrigin(rect.getOrigin().x, size.y);
        rect.setSize(size);
}

void Bar::draw(sf::RenderWindow & window)
{
        window.draw(rect);
}


void Bar::update()
{
}

int Bar::getWidth()
{
        return rect.getGlobalBounds().width;
}

int Bar::getHeight()
{
        return rect.getGlobalBounds().height;
}


sf::Vector2f Bar::getPos()
{
        return rect.getPosition();
}
 

3

Graphics / Failed Loading Texture - Reason Out of Memory

« on: June 06, 2017, 04:30:03 pm »

I'm trying to load a Texture with a size of 32,768 x 4096 but it failed to do so. What does it mean of this error? how can I solve it? also, what is the maximum size SFML can load textures?

4

Graphics / One Texture Shared to Multiple Sprites

« on: May 26, 2017, 05:38:50 pm »

Is it possible to share only one texture into a different Sprites in order to minimize creating texture object?
or should I just make a Copy of it?

sf::Sprite enemy;
sf::Sprite player;

sf::Texture *texture;
texture = new Texture();

if (texture->loadFromFile("assets/player.png"))
player.setTexture(texture);

if (texture->loadFromFile("assets/enemy.png"))
enemy.setTexture(texture);