Super Meat Boy movement system?

Frazzle

I've been working on a platformer recently, and recently decided I want a movement system that is kind-of airy, like super meat boy, where it takes half a second for the character to gain full speed when moving left and right. I typically use a 'constrain x-velocity' rule for running in platformers but this obviously wont be compatible with this, but I've seen other GS games (old templates) that have a similar system to SMB, any help?

Cheers, FM

Armelline

They probably used the accelerate behaviour, but there are a few ways this could be achieved.

Frazzle

Right, I tried that with the 'max speed' being applied at what i wanted to running speed to be, but this obviously ruined jumping/ gravity... must be another way.

Frazzle

Bump; any ideas?

Hopscotch

@Frazzle ,

try this

Friction OFF in MeatBoy and Platforms

Meatboy behaviors:

The jump section obviously changes Linear Motion.Y

Frazzle

Cheers! How would you make the character slow down quickly instead of coming to an abrupt stop when you let go of the keys? I tried using drag but it makes the character spaz when on a platform...

Hopscotch

@Frazzle said:
Cheers! How would you make the character slow down quickly instead of coming to an abrupt stop when you let go of the keys? I tried using drag but it makes the character spaz when on a platform...

The opposite of the speeding up.

Change the Constrain in the Otherwise section to:

Rule: if self.Motion.Linear Velocity.X > 0
Constrain: self.Motion.Linear Velocity.X To max(0,self.Motion.Linear Velocity.X-25)

Rule: if self.Motion.Linear Velocity.X < 0
Constrain: self.Motion.Linear Velocity.X To min(0,self.Motion.Linear Velocity.X+25)

Frazzle

Ok, what does +25 refer to, by the way?

As_Of_Latte

Was Super Meat Boy developed with GameSalad??

Hopscotch

@As_Of_Latte said:
Was Super Meat Boy developed with GameSalad??

Could have been.

Hopscotch

@Frazzle said:
Ok, what does +25 refer to, by the way?

+25 is the increment by which the actor speeds up, 900 is the maximum speed.

Lets take the movement in the right direction:

We constrain the actor's X velocity to the function min( X velocity+25,900)

X velocity+25 increases the speed by 25 every game cycle.

The function min() returns the smallest of a set of numbers.
In this case it allows the actor to speed up to a maximum speed of 900.

Mind-bending, but that is how it works. The max() function does the opposite.

3absh

If your app is for mobile, you should definitely look into Leo's Fortune style of movement with a faster pace.

Frazzle

Thank you @Hopscotch!