How To Make A Ball Move In Unity 3D | Unity Tutorial
In this Unity 3D tutorial, discover how to implement smooth ball movement! We’ll walk you through setting up a 3D ball, adding movement controls with C# scripting, and applying forces for responsive gameplay. Ideal for beginners, this tutorial will help you get your ball rolling and gain confidence in Unity's physics and scripting systems.
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Scripts:
BallMovement.cs
using UnityEngine;
public class BallMovement : MonoBehaviour
{
public float forceAmount = 10f; // Force applied for movement
public float jumpForce = 10f; // Force applied for jumping
public int maxJumps = 2; // Maximum number of jumps
private int jumpCount = 0; // Current number of jumps
private bool isGrounded; // Check if the ball is on the ground
private Rigidbody rb;
void Start()
{
rb = GetComponent<Rigidbody>();
}
void Update()
{
// Movement controls
if (Input.GetKey(KeyCode.W))
{
rb.AddForce(Vector3.forward * forceAmount);
}
if (Input.GetKey(KeyCode.S))
{
rb.AddForce(Vector3.back * forceAmount);
}
if (Input.GetKey(KeyCode.A))
{
rb.AddForce(Vector3.left * forceAmount);
}
if (Input.GetKey(KeyCode.D))
{
rb.AddForce(Vector3.right * forceAmount);
}
// Jumping
if (Input.GetKeyDown(KeyCode.Space))
{
if (isGrounded || jumpCount < maxJumps)
{
rb.AddForce(Vector3.up * jumpForce, ForceMode.Impulse);
jumpCount++;
}
}
}
// Check if the ball is on the ground
private void OnCollisionStay(Collision collision)
{
if (collision.gameObject.CompareTag("Ground"))
{
isGrounded = true;
jumpCount = 0; // Reset jump count when grounded
}
}
private void OnCollisionExit(Collision collision)
{
if (collision.gameObject.CompareTag("Ground"))
{
isGrounded = false;
}
}
}
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CameraFollowBall.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CameraFollowBall : MonoBehaviour
{
public Transform player; // The player's transform
public Vector3 offset; // Offset position from the player
public float smoothSpeed = 0.125f; // Speed at which the camera follows
void LateUpdate()
{
if (player != null)
{
// Calculate the desired position
Vector3 desiredPosition = player.position + offset;
// Smoothly interpolate between the camera's current position and the desired position
Vector3 smoothedPosition = Vector3.Lerp(transform.position, desiredPosition, smoothSpeed);
// Update the camera's position
transform.position = smoothedPosition;
}
}
}
