Question

I was looking at a basic Box2D program, more specifically this one.

Everything is fairly simple and makes sense, except for this line:

Shape.SetAsBox((32.f/2)/SCALE, (32.f/2)/SCALE);   // SCALE = 30

Now I know we divide by SCALE to scale 1m->30px but why is 32.f divided by 2? I don’t understand why we divide by 2, if my box texture is 32×32 pixels.

Answer 1

from the manual :

groundBox.SetAsBox(50.0f, 10.0f);

The SetAsBox function takes the half-width and half-height (extents)