PLAYER SCRIPT

RAYCASTING | GAME BASED EXAMPLES | COLOR CHANGE VIA MOUSE CLICK

SCRIPT NEEDS TO ACCOMPLISH...

• User Input --> Left Mouse Click

  • Fire Raycast from Mouse position

    • If collides with object, gather data

    • If object is a cube, modify color

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.InputSystem;

public class ColorChangeClick : MonoBehaviour
{

    void Update()
    {
        if (Mouse.current.leftButton.wasPressedThisFrame)
        {
            Vector2 mousePos = Mouse.current.position.ReadValue();
            Ray rayOrigin = Camera.main.ScreenPointToRay(mousePos);
            RaycastHit hitInfo;


            if (Physics.Raycast(rayOrigin, out hitInfo))
            {
                Debug.Log("Hit: " + hitInfo.collider.name);
                hitInfo.collider.GetComponent<MeshRenderer>().material.color = UnityEngine.Random.ColorHSV();
            }
        }
    }
}

CODE BREAKDOWN

• LINE 11 - 25 ==> If statement that is ran when the user presses the left mouse button

  • LINE 13 --> Creates a Vector2 type variable to hold the position of the mouse

  • LINE 14 --> Defines the starting point of the ray [rayOrigin]

  • LINE 15 --> Structure used to get information back from a raycast collision [RaycastHit]

• LINE 18 - 22 ==> If statement that returns true when the ray intersects into any collider [Raycast Declaration]

  • LINE 20 --> Access the extracted information in hitInfo to display the Objects name in the Unity Console

  • LINE 21 --> Goes further into the extracted data in hitInfo to change the color of the cube gameobject