Colision question

Is there a way to check if an object is in its entirety inside another object?

Or to check if every single pixel of one object is colliding with another object?

It can be calculated easily with a bit of math if the objects are boxes or circles. Also with a bit of logic you can use collision polygons.

http://dl.dropbox.com/u/5426011/examples12/sprite_in_sprite.capx

Making it work with rotated objects would complicate things a bit. It's doable but I would opt for objects with no rotation.

Finally it is possible to do a per-pixel check with the canvas plugin but I imagine it would be dog slow.

The user can actually change the angle of the object on a per 10� basis, and select from several differently shaped objects.

So the only solution would be to have up to 36 different mathematical expressions per shape, right? I think I'll try a different approach for my problem. :P

And I don't even want to it try with the canvas plugin, it won't end well.

Thanks for the reply.

o the only solution would be to have up to 36 different mathematical expressions per shape, right?

I avoid such situations when I can.

Here is a further refinement of the "poly" method that handles rotation.

http://dl.dropbox.com/u/5426011/examples12/sprite_in_sprite2.capx

Thanks, I'll try to make the best use of it.

R0J0hound Can you update the links please. I want to see the formulas. I can use collision polygons to detect overlapping, but I'm wondering if it'll be faster to just use formulas instead of using sprites and checking collision polygons.

Pandy

Check this post, it may be relevant.

I posted a few examples there where I perform hundreds of overlapping checks per tick and the impact on performance is quite small. According to Ashley, overlapping checks in C2 are well optimized.

dop2000

Thanks, will check it out.