I touchs: 7月 2016

2016年7月29日星期五

Unreal: Dynamic Material

since: 2016/07/29
update: 2016/07/29
reference:
1. // Introduction to Unreal Engine Part 8: Adding random assets by Rob Redman

A. 下載專案會用到的檔案:
> 2150_tid_rock.zip.zip , 解壓縮後得到: rock.obj 檔案

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B. 新增專案:
1. 新增一個 Blank 的 Blueprint 專案

2. 匯入剛剛的 rock.obj 檔案

3. > Import All

4. 結果:

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C. 新增給 Rock 使用的 Material:
1. Add New > Material

2. 取名為: DIFFUSE , 並雙擊滑鼠以開啟 Material Editor

3. 新增一個: VectorParameter Node

4. 取名為: Color(參數名稱), 並與 DIFFUSE Node 的 Base Color Pin 連接.

5. 新增一個: Constant Node

6. 並與 DIFFUSE Node 的 Roughness Pin 連接.

7. 關閉 Material Editor , 雙擊 Rock , 並將其 asset 更改為剛剛的 DIFFUSE Material

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D. 新增給 Rock 使用的 Blueprint:
1. Add New > Blueprint Class

2. > Actor

3. 取名為 Rock_BP, 並雙擊滑鼠以開啟 Blueprint Editor 並切換到 Event Graph

4. 接下來使用到雙螢幕:
a. 點選 rock

b. 將其拖拉到 Rock_BP 的 Components 裡

c. 結果:

5. 將 Event BeginPlay 與 Create Dynamic Material Instance(rock) 連結

6. 並將其 Source Material 設為 DIFFUSE

7. 接著, 再將其連結 Set Vector Parameter Value Node:

8. 連結如下, 並將 Parameter Name 設為 Color(DIFFUSE 裡設定的參數名稱)

9. 最後, 新增 3 個 Random Float in Range Node 與 1 個 Make Vector Node 連結如下:

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E. 回到場景
1. 將 Rock_BP 拖拉多個到場景裡

2. 執行關卡:

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F. 產生灰階效果:
1. 修改 Rock_BP 如下:

2. 執行關卡:

2016年7月26日星期二

iOS: Media Player

since: 2016/07/26
update: 2016/07/26
reference:
1. Swift Video Player using AVPlayerViewController

A. 新增專案:
1. iOS > Application > Single View Application > Next

2. > Next > Create

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B. 設定 iOS 支援的最小版本:
專案 > General > Deployment Target: 8.0

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C. 加入多媒體檔:
1. > 將多媒體檔案拖拉到專案資料夾內

2. > 記得勾選 Copy items if needed
> Finish

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D. 將預設的 View Controller 嵌入到 Navigation Controller 裡:
1. > Main.storyboard > 點選右邊 View Controller
> Editor > Embed In > Navigation Controller

2. 結果如下:

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E. 新增給 ViewController 轉場(segue) 使用的 AV Player ViewController
1. 將 AVKit Player View Controller 拖拉到 Main.storyboard 裡.

    2. > 點選 ViewController > 按下 Ctrl + 滑鼠左鍵
        > 拖拉到 AV Player ViewController 放開
        > 選取 Manual Segue > Show

3. 完成後, 右上方出現提示: 需要幫 Segue 設定 ID

4. 幫此 Segue 設定 ID : seguePlayMedia

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F. 幫 View Controller 的 Navigation Item 設定 Title 名稱:
> 在此為: Media Player

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G. 新增二個 Button:
1. 在 View Controller 新增二個 Button: Play Local Video 與 Play Local Audio

2. 新增限制條件:
> 水平置中

> 固定寬高, 保持寬高比, 固定與下邊界或上邊界的距離

> 結果:

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H. 開啟 ViewController.swift 修改如下:
import UIKit

//@add #######################
import AVKit
import AVFoundation

//class ViewController: UIViewController {
//@update #######################
class ViewController: UIViewController, AVPlayerViewControllerDelegate {

    //@add #######################
    // url for playing video
    var mediaURL: NSURL!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    //@add #######################
    // action - play local video
    @IBAction func playLocalVideo(sender: UIButton) {

        // create video url form remote location (i.e. video stored at domain etc.)
        //self.mediaURL = NSURL(string: "http://download.prashantmangukiya.com/SwiftVideoPlayer-Data/Big_Buck_Bunny_Trailer.m4v")

        // create video url from local resource (i.e video stored within project folder)
        self.mediaURL = NSBundle.mainBundle().URLForResource("everest", withExtension: "mov")!

        // perform segue
        self.performSegueWithIdentifier("seguePlayMedia", sender: self)
    }

    //@add #######################
    // action - play Local Audio
    @IBAction func playLocalAudio(sender: UIButton) {

        // create audio url form local resource (i.e audio stored within project folder)
        self.mediaURL = NSBundle.mainBundle().URLForResource("popular", withExtension: "mp3")!

        // perform segue
        self.performSegueWithIdentifier("seguePlayMedia", sender: self)
    }

    //@add #######################
    // MARK: - Navigation function
    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

        if segue.identifier == "seguePlayMedia" {

            // get destination view controller
            let destVc = segue.destinationViewController as! AVPlayerViewController

            // set player
            destVc.player = AVPlayer(URL: self.mediaURL)

            //@add #######################
            destVc.player?.play() // auto play
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

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I. 幫二個 Button 繫結事件: