rotate actor to direction its going?

UtopianGames

Hi Guys,

This question has been ask several times so im hoping someone would be so kind and do a simple demo.

I'm trying to have a round actor (with arrow pointing right sprite for eg) and wondering how to rotate this actor to point the arrow in the same direction.

If the actor moves up the arrow will point/rotate up (would like it in all possible directions though).

Thanks for looking and i hope you can help me and several other gs users.

Darren.

JGary321

Maybe I'm not sure what you're asking, but I created a quick demo, not gonna bother posting b/c it's easy.

Wherever your 'move' command is also put in rotate to angle (relative to scene) adjust the speed to make it as fast as you want, & the direction the same as the move direction.

So if your move direction is 90, make the rotate to angle 90.

If this is not what you mean give me a little more info on what you want.

UtopianGames

what about if the actor changes direction like a bouncing ball off walls? how would we go about finding the new direction everytime?

Imagine a bullet or rocket that moves around bouncing off other actors but the bullet always points to the way its moving.

Hope this explains more clearly.

Darren.

rebump

`
constrain

self.rotation to vectorToAngle(self.MotionLinearVelocity.X, self.Motion.LinearVelocity.Y)
`
Note: You may have to add a constant value to the above depending on what direction your actor's image faces. I think if you assign an image to the actor that faces/points upward, then you add like "90" to the value above. For example:

`
constrain

self.rotation to vectorToAngle(self.MotionLinearVelocity.X, self.Motion.LinearVelocity.Y) + 90
`

UtopianGames

Brilliant super and Yipeeee.

Guess you know im happy with that and it works a treat!

Thanks so much Red!

Darren.

rebump

@utopian: No problem. Glad it worked out for you. Oh, and it's "rebump", not "redump". ;-)

(although I think this is a reference to the first time someone, you?, called me "redump"...so if that is the case...too funny!) :-D