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Help => General => Topic started by: MFB on May 22, 2017, 01:09:57 pm

Title: Flipping sprites with set scale vs flipping images[SOLVED]
Post by: MFB on May 22, 2017, 01:09:57 pm

I'm currently writing a very simple platformer(if there is such a thing) and I have to make a decision; some of my sprite sheets are symmetrical thus the sprites need to be mirrored when the player is facing the other direction. Currently I haven't implemented mirroring in my animation so I do something like this for all sprite sheets

if(CurrentState == Idle)
{
if(CurrentDirection == left)
    animation->Row = 0;
if(CurrentDirection == right)
    animation->Row = 1;
}
 

Would it be slower if I did this instead, would the space I save on sprite sheets be worth it?

if(CurrentState == Idle)
{
animation->Row = 0;
if(CurrentDirection == left)
    animation->Sprite.SetScale(1,1);
if(CurrentDirection == right)
    animation->Sprite.SetScale(-1,1);
}
 

Note: My sprite sheets consist of rows and columns of 250x250 images, usually about 25 mb's in size.

Title: Re: Flipping sprites with set scale vs flipping images
Post by: Laurent on May 22, 2017, 02:37:10 pm

If your question is "is it expensive to apply a (negative) scale?", then no, it's free.

Title: Re: Flipping sprites with set scale vs flipping images
Post by: MFB on May 22, 2017, 02:54:26 pm

Thanks a lot! That was exactly what I was asking.