Update Hello World

[apkatsikas]

Updates Hello World to skip null body when drawing.

I noticed when drawing 0 boxes that there is still something being rendered:

[notgiven688]

Using string-tags to filter out "non-drawables" is probably not good style. The body you observe being drawn at the center is the world.NullBody.

So if(body == planeBody || body == world.NullBody) continue; should fix it (untested).

[apkatsikas]

Using string-tags to filter out "non-drawables" is probably not good style. The body you observe being drawn at the center is the world.NullBody.

So if(body == planeBody || body == world.NullBody) continue; should fix it (untested).

Yup - this works great. I've made the change.