73 lines
1.8 KiB
C#
73 lines
1.8 KiB
C#
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using UnityEngine;
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namespace Lean.Common
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{
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/// <summary>This script moves the ball left or right and resets it if it goes out of bounds.</summary>
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[RequireComponent(typeof(Rigidbody))]
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[HelpURL(LeanHelper.PlusHelpUrlPrefix + "LeanPongBall")]
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[AddComponentMenu(LeanHelper.ComponentPathPrefix + "Pong Ball")]
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public class LeanPongBall : MonoBehaviour
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{
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[Tooltip("Starting horizontal speed of the ball")]
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public float StartSpeed = 1.0f;
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[Tooltip("Starting vertical speed of the ball")]
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public float Spread = 1.0f;
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[Tooltip("The acceleration per second")]
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public float Acceleration = 0.1f;
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[Tooltip("If the ball goes this many units from the center, it will reset")]
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public float Bounds = 10.0f;
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// The current rigidbody
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private Rigidbody body;
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// The current speed of the ball
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private float speed;
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protected virtual void Awake()
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{
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// Store the rigidbody component attached to this GameObject
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body = GetComponent<Rigidbody>();
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// Reset the ball
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ResetPositionAndVelocity();
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}
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protected virtual void FixedUpdate()
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{
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// Is the position out of bounds?
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if (transform.localPosition.magnitude > Bounds)
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{
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ResetPositionAndVelocity();
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}
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// Increase speed value
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speed += Acceleration * Time.deltaTime;
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// Reset velocity magnitude to new speed
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body.velocity = body.velocity.normalized * speed;
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}
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private void ResetPositionAndVelocity()
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{
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// Reset position
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transform.localPosition = Vector3.zero;
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// Reset speed value
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speed = StartSpeed;
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// If moving right, reset velocity to the left
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if (body.velocity.x > 0.0f)
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{
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body.velocity = new Vector3(-speed, Random.Range(-Spread, Spread), 0.0f);
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}
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// If moving left, reset velocity to the right
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else
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{
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body.velocity = new Vector3(speed, Random.Range(-Spread, Spread), 0.0f);
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}
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}
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}
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}
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