Ball game physics questions

[Coder567]

Hi
I was looking to the love physics and I think that's great for my game. However I have couple of questions if anyone knows good way to go about it.

First I'm making a sport game where there is walls around the play area which the ball cannot pass but should bounce back (and I'm going to use love physics for this). And in game the players carry around the ball but what if the ball touches the border? How do I combine the physics engine with players being able to carry the ball with them?

Second question, is there a function to check when the ball crosses the goal line?

thanks!

[ivan]

How do I combine the physics engine with players being able to carry the ball with them?

Use applyImpulse and applyTorque.
Do not change the velocity or position manually.

is there a function to check when the ball crosses the goal line

Box2D has collision callbacks and contact lists.
For things like triggers and sensors, use the latter.

[Coder567]

Use applyImpulse and applyTorque.
Do not change the velocity or position manually.

I guess I could do that but it complicates things. easier to just set the position than trying to aim with vector

Box2D has collision callbacks and contact lists.
For things like triggers and sensors, use the latter.

Is box2D in love.physics?

[ivan]

easier to just set the position than trying to aim with vector

In that case, don't expect your ball to react to other objects

Is box2D in love.physics?

Yes

[Coder567]

Ok
If anyone has code examples for my questions it would be great!

Edit: Found Fixture:setSensor( true ) - for the goal line