Rigidbody decreasing speed after collission

I'm creating an endless runner (in 2D) in which there is a force directed only to the right, multiplied by a Vector3 (1,0,0) that sets his movement speed.
The code I have is the following:

Code (CSharp):

1. public float speed;
2. public Rigidbody rb;
3.  
4. void Start()
5.     {
6.         rb.GetComponent<Rigidbody>();
7.         direction = new Vector3(1, 0, 0);
8.     }
9.  
10. void FixedUpdate()
11.     {
12.         transform.Translate(direction * speed);
13.     }

The code works and the player moves, everything is fine. My problem is that if he hits a platform (horizontally), his speed decreases to a certain value, and then it remains constant on that value.
The easy way to fix this would be to increase the distance between platforms, so I have a way to fix it, I was wondering if there is another way, and came up here to get help.

Thanks!

 

Hello busterlock

Few questions first :
Do u want to keep the speed as constant even after hitting the platform ?
By any chance are u reducing the speed when the character collides to the platform?

Thanks.

 

Exactly, I want to keep the speed constant! And regarding the speed decrease when the collision happens, I am not doing it manually, but because of the forces operations, the character's speed decreases by itself.

 

This isn't using forces or the physics system at all. You're simply moving the transform which is probably becoming stuck inside a collider while you endlessly teleport it. Set the velocity of the rigidbody instead.

 

Yes the speed will decrease as you are using Rigid bodies and applying force to it, any rigid body moved using force will slowdown after collision.

you need to set the velocity as mentioned by "GroZZleR".