Controller speed

[Roland]

This is the information given about update of a controller

 

void UpdateController( TController controller, flt angle, flt move, flt strafe=0, flt jump=0, flt maxacceleration=0.5f, int iterations=1, int crouchmode=0 )

 

Updates the controller direction, movement and jump state. The iterations parameter controls how many times collision is calculated. Using several iterations can make motion appear smoother when a camera is attached to the controller. However, an iterations value of one is enough for controllers that do not control the view.

 

Question

 

How does the parameter 'move' relate to the actual movement in the game.

What does a value of 'move=1' mean?

 

What does 'max acceleration=1' mean?

[DaDonik]

I can't give you precise information about "move" and "acceleration", but i can say that those values are not frame rate independent. Means you still need to multiply the passed value by Appspeed() to get it right.

What i use is a macro for ((1.0f / 60.0f) * Appspeed()), which allows me to use meters per seconds everywhere.

[Roland]

Ok DaDonik, sounds usable. I assume your monitors refresh rate is 60 with Flip(1). Mine is 120 so that would be (1/120)*AppSpeed() then. Will test that when I come home from work. Thanks

[DaDonik]

It's actually based on the physics update rate, which is 60. But you are right, if i move sth without physics i would get in trouble =)

[Roland]

Silly question. Is it possible to get the physics update rate somewhere or is it always 60 on all machines?

[DaDonik]

Check this page: http://www.leadwerks.com/wiki/index.php?title=UpdatePhysicsCallback

It made me assume that the physics engine is constantly updated at 60hz, if i do it like:

UpdateWorld(AppSpeed());

[Roland]

Aaah... Cool. Thanks

[Pixel Perfect]

Just a heads up. I have never found you need to modulate the velocity parameter to UpdateController with AppSpeed(). All my previous testing showed that any given constant value remains correct as you increase or decrease the framerate. This is about the only place I don't use it!