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Question Please Assist: Player Movement

Discussion in 'Physics' started by kdogjake, Nov 2, 2020.

  1. kdogjake


    Oct 29, 2020
    Hi. I'm currently working on my first 3D unity game and am having some trouble with the character movement. The player cannot change their velocity on the X and Z axis while in the air, and I wanted to change that. I've tried removing the if statement detecting that the player is grounded, but for some reason that makes the player unable to jump. Please advise.

    Code (CSharp):
    1. CharacterController controller = GetComponent<CharacterController>();
    2.         AudioSource jumpSound = GetComponent<AudioSource>();
    3.         // is the controller on the ground?
    5.         if (controller.isGrounded)
    6.         {
    7.             isRunning = false;
    8.             //Feed moveDirection with input.
    9.             moveDirection = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
    10.             moveDirection = transform.TransformDirection(moveDirection);
    11.             //Multiply it by speed.
    12.             if (Input.GetKey(KeyCode.LeftControl) && moveDirection.x != 0)
    13.             {
    14.                 moveDirection *= speed*2;
    15.                 isRunning = true;
    16.             } else
    17.             {
    18.                 moveDirection *= speed;
    19.             }
    21.             //Jumping
    22.             if (Input.GetButton("Jump") && controller.isGrounded)
    23.             {
    24.                 moveDirection.y = jumpSpeed;
    25.                 jumpSound.Play();
    26.                 isRunning = false;
    27.             } else
    28.             {
    29.                 moveDirection.y = 0.1f;
    30.             }
    31.         }
    32.         //Applying gravity to the controller
    33.         moveDirection.y -= gravity * Time.deltaTime;
    34.         //Making the character move
    35.         controller.Move(moveDirection * Time.deltaTime);
  2. wztk


    Feb 25, 2020

    The isGrounded check is essential for Jump to work, because otherwise you either would be able to jump indefinitely or, as in your case, not jump at all.
    However, it's included twice in your code when it's not necessary, so you can remove it in line 22.
    Also, move direction is only assigned to when character is on the ground, but when it's jumping it doesn't read horizontal and vertical axes, so you need to create an else case or a general case that works regardless of whether the player is grounded or not.

    Kind regards.
    Last edited: Nov 2, 2020
  3. kdogjake


    Oct 29, 2020
    I'm unsure as to why, but when I've tried this my character has been unable to jump. I attempted to move the horizontal movement outside of the isGrounded check, but it resulted in the same thing of my character being unable to jump.
  4. wztk


    Feb 25, 2020
    Can you show the code snippet that does that ?