drag rotation

Guardianofgahoole

How would you make it so if i drag something then it rotates with finger?

RThurman

A quick way would be to do the following--

In an actor prototype:

Timer (every .025 seconds)
----When actor receives event: (touch) is: (inside)
--------Change Attribute: (self.Rotation) To: vectorToAngle( self.Position.X - game.Mouse.Position.X , self.Position.Y - game.Mouse.Position.Y )

JohnPapiomitis

RThurman said:
A quick way would be to do the following--

In an actor prototype:

Timer (every .025 seconds)
----When actor receives event: (touch) is: (inside)
--------Change Attribute: (self.Rotation) To: vectorToAngle( self.Position.X - game.Mouse.Position.X , self.Position.Y - game.Mouse.Position.Y )

RThurman said:
A quick way would be to do the following--

In an actor prototype:

Timer (every .025 seconds)
----When actor receives event: (touch) is: (inside)
--------Change Attribute: (self.Rotation) To: vectorToAngle( self.Position.X - game.Mouse.Position.X , self.Position.Y - game.Mouse.Position.Y )

That causes very jerky movements, not really what you want.

Best way to do it is as so:

Have 3 self interger attirbutes. StartRotation, StartAngle, andMyAngle

When actor receives event touch is pressed:

-change attribute StartRotation to: self rotation

-change attribute StartAngle to: vectorToAngle(mouse.position.x-self.position.x,mouse.position.y-self.position.y)

-constrain attribute MyAngle to: vectorToAngle(mouse.position.x-self.position.x,mouse.position.y-self.position.y)

-constrain attribute self.rotation to: startRotation+(MyAngle-StartAngle)

RThurman

@JohnPapiomitis
Yes -- that smooths out the initial lurch very nicely!