Introduction and Session Goals

확인 완료한 버전: 2017.1

-

난이도: 초급

In this session we will learn how to create an in-game video player which the player can interact with using first person shooter controls. The goals of this session are to learn how to use the VideoPlayer component and how to write scripts to control it. In this session we will introduce the session and what we will learn.

Introduction and Session Goals

초급 Graphics

Download the assets to follow along with this training here

WorldSpaceVideo

Code snippet

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Video;
using UnityEngine.UI;

public class WorldSpaceVideo : MonoBehaviour {

    public Material playButtonMaterial;
    public Material pauseButtonMaterial;
    public Renderer playButtonRenderer;
    public VideoClip[] videoClips;
    public Text currentMinutes;
    public Text currentSeconds;
    public Text totalMinutes;
    public Text totalSeconds;
    public PlayHeadMover playHeadMover;

    private VideoPlayer videoPlayer;
    private int videoClipIndex;

    void Awake()
    {
        videoPlayer = GetComponent<VideoPlayer> ();
    }

    // Use this for initialization
    void Start () 
    {
        videoPlayer.targetTexture.Release ();
        videoPlayer.clip = videoClips [0];  
    }
    
    // Update is called once per frame
    void Update () 
    {
        if (videoPlayer.isPlaying) 
        {
            SetCurrentTimeUI ();
            playHeadMover.MovePlayhead (CalculatePlayedFraction ());
        }
    }

    public void SetNextClip()
    {
        videoClipIndex++;

        if (videoClipIndex >= videoClips.Length) 
        {
            videoClipIndex = videoClipIndex % videoClips.Length;
        }

        videoPlayer.clip = videoClips [videoClipIndex];
        SetTotalTimeUI ();
        videoPlayer.Play ();

    }

    public void PlayPause()
    {
        if (videoPlayer.isPlaying) 
        {
            videoPlayer.Pause ();
            playButtonRenderer.material = playButtonMaterial;
        } else 
        {
            videoPlayer.Play ();
            SetTotalTimeUI ();
            playButtonRenderer.material = pauseButtonMaterial;
        }
    }

    void SetCurrentTimeUI()
    {
        string minutes = Mathf.Floor ((int)videoPlayer.time / 60).ToString ("00");
        string seconds = ((int)videoPlayer.time % 60).ToString ("00");

        currentMinutes.text = minutes;
        currentSeconds.text = seconds;
    }

    void SetTotalTimeUI()
    {
        string minutes = Mathf.Floor ((int)videoPlayer.clip.length / 60).ToString ("00");
        string seconds = ((int)videoPlayer.clip.length % 60).ToString ("00");

        totalMinutes.text = minutes;
        totalSeconds.text = seconds;
    }

    double CalculatePlayedFraction()
    {
        double fraction = (double)videoPlayer.frame / (double)videoPlayer.clip.frameCount;
        return fraction;
    }
}

ShootableUI

Code snippet

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

public abstract class ShootableUI : MonoBehaviour 
{

    public WorldSpaceVideo worldSpaceVideo;

    public abstract void ShotClick();
}

PlaybuttonControl

Code snippet

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

public class PlaybuttonControl : ShootableUI 
{
    public override void ShotClick ()
    {
        worldSpaceVideo.PlayPause ();
    }
}

RaycastShootComplete

Code snippet

using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;

public class RayCastShootComplete : MonoBehaviour {

    public int gunDamage = 1;                                           // Set the number of hitpoints that this gun will take away from shot objects with a health script
    public float fireRate = 0.25f;                                      // Number in seconds which controls how often the player can fire
    public float weaponRange = 50f;                                     // Distance in Unity units over which the player can fire
    public float hitForce = 100f;                                       // Amount of force which will be added to objects with a rigidbody shot by the player
    public Transform gunEnd;                                            // Holds a reference to the gun end object, marking the muzzle location of the gun

    private Camera fpsCam;                                              // Holds a reference to the first person camera
    private WaitForSeconds shotDuration = new WaitForSeconds(0.07f);    // WaitForSeconds object used by our ShotEffect coroutine, determines time laser line will remain visible
    private AudioSource gunAudio;                                       // Reference to the audio source which will play our shooting sound effect
    private LineRenderer laserLine;                                     // Reference to the LineRenderer component which will display our laserline
    private float nextFire;                                             // Float to store the time the player will be allowed to fire again, after firing


    void Start () 
    {
        // Get and store a reference to our LineRenderer component
        laserLine = GetComponent<LineRenderer>();

        // Get and store a reference to our AudioSource component
        gunAudio = GetComponent<AudioSource>();

        // Get and store a reference to our Camera by searching this GameObject and its parents
        fpsCam = GetComponentInParent<Camera>();
    }
    

    void Update () 
    {
        // Check if the player has pressed the fire button and if enough time has elapsed since they last fired
        if (Input.GetButtonDown("Fire1") && Time.time > nextFire) 
        {
            // Update the time when our player can fire next
            nextFire = Time.time + fireRate;

            // Start our ShotEffect coroutine to turn our laser line on and off
            StartCoroutine (ShotEffect());

            // Create a vector at the center of our camera's viewport
            Vector3 rayOrigin = fpsCam.ViewportToWorldPoint (new Vector3(0.5f, 0.5f, 0.0f));

            // Declare a raycast hit to store information about what our raycast has hit
            RaycastHit hit;

            // Set the start position for our visual effect for our laser to the position of gunEnd
            laserLine.SetPosition (0, gunEnd.position);

            // Check if our raycast has hit anything
            if (Physics.Raycast (rayOrigin, fpsCam.transform.forward, out hit, weaponRange))
            {
                // Set the end position for our laser line 
                laserLine.SetPosition (1, hit.point);

                // Get a reference to a health script attached to the collider we hit
                ShootableBox health = hit.collider.GetComponent<ShootableBox>();

                // If there was a health script attached
                if (health != null)
                {
                    // Call the damage function of that script, passing in our gunDamage variable
                    health.Damage (gunDamage);
                }


                // Check if the object we hit has a rigidbody attached
                if (hit.rigidbody != null)
                {
                    // Add force to the rigidbody we hit, in the direction from which it was hit
                    hit.rigidbody.AddForce (-hit.normal * hitForce);
                }

                ShootableUI shotUI;
                shotUI = hit.collider.GetComponent<ShootableUI> ();

                if (shotUI != null) 
                {
                    shotUI.ShotClick ();
                }
            }
            else
            {
                // If we did not hit anything, set the end of the line to a position directly in front of the camera at the distance of weaponRange
                laserLine.SetPosition (1, rayOrigin + (fpsCam.transform.forward * weaponRange));
            }
        }
    }


    private IEnumerator ShotEffect()
    {
        // Play the shooting sound effect
        gunAudio.Play ();

        // Turn on our line renderer
        laserLine.enabled = true;

        //Wait for .07 seconds
        yield return shotDuration;

        // Deactivate our line renderer after waiting
        laserLine.enabled = false;
    }
}

NextButtonControl

Code snippet

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

public class NextButtonControl : ShootableUI {

    public override void ShotClick ()
    {
        worldSpaceVideo.SetNextClip ();
    }
}

PlayHeadMover

Code snippet

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

public class PlayHeadMover : MonoBehaviour 
{
    public Transform startPoint;
    public Transform endPoint;

    public void MovePlayhead(double playedFraction)
    {
        transform.position = Vector3.Lerp (startPoint.position, endPoint.position, (float)playedFraction);
    }
}

Unity 검색

Unity ID

Introduction and Session Goals

확인 완료한 버전: 2017.1

-

난이도: 초급

Introduction and Session Goals

WorldSpaceVideo

Code snippet

ShootableUI

Code snippet

PlaybuttonControl

Code snippet

RaycastShootComplete

Code snippet

NextButtonControl

Code snippet

PlayHeadMover

Code snippet

Graphics

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