Need help with my movement script.. :(

Question

Currently, my movement script uses only these few lines of code for the horizontal movement in the Update method:

 movement = Input.GetAxis("Horizontal");
         if (sprinting)
         {
             rb.velocity = new Vector2(movement * sprintSpeed, rb.velocity.y);
         }
         else
         {
             rb.velocity = new Vector2(movement * speed, rb.velocity.y);
         }

It works just how I wanted it thus far. However, now I have implemented horizontal boost pads. They worked fine vertically since I don't set the rb.velocity.y each frame.

However, this script does not allow my player to be boosted on the x-axis, since I set the rb.velocity.x each frame. Recursion makes this a real pain to deal with.. I've been trying to find a solution for the past 2-3 hours, and have come to nothing really working. Can someone help me with this? :(

Answer 1

Depending on the effect that you are looking for I can think of a couple solutions.

You could multiply the movement * speed by another term.. for purposes of example I will call it boost_Mult. Set this equal to 1 when you declare it so you get.

 movement = Input.GetAxis("Horizontal");
 float boost_Mult = 1;
          if (sprinting)
          {
              rb.velocity = new Vector2(movement * sprintSpeed * boost_Mult, rb.velocity.y);
          }
          else
          {
              rb.velocity = new Vector2(movement * speed * boost_Mult, rb.velocity.y);
          }

You could use Vector2.lerp (or smoothdamp) for your velocities. This will give you a smoother transition from one speed to the next so you could write the following. Where "t" is reset to zero when you hit a booster and boostSpd is whatever speed you want the player to be at upon being boosted, also set when the player hits a booster.

    movement = Input.GetAxis("Horizontal");
      Vector2 noBoostSpd;
      Vector2 boostSpd;
      float spdDampRate = 2.0f;
     float t = 0;


     if (t >= 1)
     {
          t = 1;
      }
     else
     {
           t += Time.deltaTime * spdDampRate ;
      }
      if (sprinting)
      {
           noBoostSpd = new Vector2(movement * sprintSpeed, rb.velocity.y);
      }
      else
      {
          noBoostSpd = new Vector2(movement * speed, rb.velocity.y);
      }

      rb.velocity = Vector2.Lerp(boostSpd, noBoostSpd, t);

Something like this.

Need help with my movement script.. :(

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