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Help => Graphics => Topic started by: lap1994 on November 08, 2009, 05:57:52 pm

Title: One sprite, various objects, am I doing it wrong?
Post by: lap1994 on November 08, 2009, 05:57:52 pm

I am new to SFML and I'm making a small shmup. I have this image of a star(its actually a white dot but whatever). Then  Ive to draw each of the 1000 stars in the screen. But instead of using one sprite for each star I use sprite for every star! And I'm not sure if this is the right way :(

Code: [Select]


    for(int i = 0; i < (int)cg->stars.size(); i++)
    {
        switch(cg->stars[i].kind)
        {
            case 0:
            {
                cg->sprites[sid_star0].SetPosition(cg->stars[i].x, cg->stars[i].y);
                cg->sprites[sid_star0].SetRotation(cg->stars[i].rot);

                wnd.Draw(cg->sprites[sid_star0]);
            }
            case 1:
            {
                cg->sprites[sid_star1].SetPosition(cg->stars[i].x, cg->stars[i].y);
                cg->sprites[sid_star1].SetRotation(cg->stars[i].rot);

                wnd.Draw(cg->sprites[sid_star1]);
            }
        }
    }


Title: One sprite, various objects, am I doing it wrong?
Post by: panithadrum on November 08, 2009, 08:57:32 pm

I don't get it at all, but maybe you should consider using just one sprite, and changing its position and rotation every step before drawing it.
Like this:

Code: [Select]

for(int i...) {
    sprite.SetPosition(stars[i].x, stars[i].y);
    sprite.SetRotation(...);
    wnd.Draw(sprite);
}

Title: One sprite, various objects, am I doing it wrong?
Post by: lap1994 on November 08, 2009, 09:10:02 pm

Thats what I'm doing. One sprite per image. One sprite for every object
I'm just not sure if this is the right way

Title: One sprite, various objects, am I doing it wrong?
Post by: Oz1571 on November 09, 2009, 01:30:10 am

You probably want all the stars to use the same image. So, 1000 sprites, 1 image.

Title: One sprite, various objects, am I doing it wrong?
Post by: panithadrum on November 09, 2009, 07:00:57 am

You are doing right. Why don't you test your code?
:-)