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Quaternions

Use best practices and Unity's Profiler window to improve performance in code.

Level 1 Code optimization

Joy Horvath

Instructional Designer

U_Intermediate_15_Quaternions.mp4

How to utilize the quaternion system to manage the rotation of game objects. 

Games

Identify potential simplification opportunities in code, such as splitting methods and reusing variables

Identify unnecessary nested if statements

Differentiate between public variables (properties), private variables (fields), and local variables

Store and organize data by applying data structures such as lists and dictionaries

Maximize code efficiency by correctly executing coding best practices

Intermediate Scripting

using UnityEngine;
using System.Collections;

public class MotionScript : MonoBehaviour 
{    
    public float speed = 3f;


    void Update () 
    {
        transform.Translate(-Input.GetAxis("Horizontal") * speed * Time.deltaTime, 0, 0);
    }
}


using UnityEngine;
using System.Collections;

public class LookAtScript : MonoBehaviour 
{
    public Transform target;


    void Update () 
    {
        Vector3 relativePos = target.position - transform.position;
        transform.rotation = Quaternion.LookRotation(relativePos);
    }
}

using UnityEngine;
using System.Collections;

public class GravityScript : MonoBehaviour 
{
    public Transform target;


    void Update () 
    {
        Vector3 relativePos = (target.position + new Vector3(0, 1.5f, 0)) - transform.position;
        Quaternion rotation = Quaternion.LookRotation(relativePos);

        Quaternion current = transform.localRotation;

        transform.localRotation = Quaternion.Slerp(current, rotation, Time.deltaTime);
        transform.Translate(0, 0, 3 * Time.deltaTime);
    }
}


using UnityEngine;
using System.Collections;

public class SomeClass : MonoBehaviour 
{
    void Start () 
    {
        transform.rotation = Quaternion.identity;
    }
}

Quaternions

1. Quaternions

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