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Question by DGKN · Jul 11, 2014 at 05:49 PM · c#rigidbodyjump

Trampoline effect (low jump to high jump)

Hi, I want my player to start jumping close to the trampoline then gradually making it jump higher and higher.

Is this the right way to implement that effect or am I doing something wrong ?

 void OnCollisionStay2D(Collision2D col)
 {
    for (jumpForce = 10; jumpForce < 100 ; jumpForce++)
    {
       if(col.gameObject.tag == "Ragdoll")
       {
         rigidbody2D.velocity = new Vector2 (0, jumpForce);
       }
    }
 }
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Answer by fafase · Jul 11, 2014 at 06:07 PM

The trampoline effect is just that the more force there is on the object, the more force the trampoline will apply back.

You can consider at rest the trampoline gives:

 force *= 0.8f

so that your guy slowly stops.

Now you can have an acceleration stage where the trampoline gives:

 force *= 1.2f

Finally, if not resting nor accelareting then you just use force as 1.

The force is used to send the guy back up:

 rigidbody2D.AddForce(transform.up * force);

Your guy will naturally go higher and higher, so you may want to clamp the force so that it gets to a max height (you can define that value based on mass, height of player, skills).

The rest is just visual effect where you stretch the trampoline up and down.

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avatar image DGKN · Jul 11, 2014 at 06:29 PM 0
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Thanks a lot for your answer, it works now :)

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