Scratch

I've tried:

<point in direction( (( Direction of Sprite 1 <-> 180 ))

But it didn't look right.

mrweston wrote:

Try the other way around: 180 - (direction of Sprite)

I'm sure that's right, but it doesn't work... But I think there's something wrong with Scratch rather than the calculation because:

Say the direction of sprite 1 is -45 and when the light touches sprite 2, it does:

180 - -45 which is 225 by my calculations.

But Scratch gives a completely diferent answer.

Can anyone see why?

Dan01 wrote:

mrweston wrote:

Try the other way around: 180 - (direction of Sprite)

I'm sure that's right, but it doesn't work... But I think there's something wrong with Scratch rather than the calculation because:

Say the direction of sprite 1 is -45 and when the light touches sprite 2, it does:

180 - -45 which is 225 by my calculations.

But Scratch gives a completely diferent answer.

Can anyone see why?

The answer will be negative, because Scratch only supports directions between -180 and 180.

mrweston wrote:

Exactly. The correct opposite of -45° is 45°. When we do 180° - (-45°), we get 225°. But then when you drop that answer into a Direction block, it "wraps" the number around within the -180-to-180 system: i.e., since it can't be larger than 180°, it wraps to zero, then counts from there. So 225° becomes 45°.

Does that help? 

Yea. Thanks to everyone that posted