AmplifyShader UVTwist

Twist,這是關鍵字,我想今天紀錄的就是扭曲的ㄧ種方式而已。


* 首先看一下最終的成像:


* 分析成像的組成:

        1. 製作扭曲的新UV -- 基本
        2. UV移動 -- 基本
        3. UV Tiling / Offset (可加可不加)
        4. 疊色_色彩增值 (可加可不加)


* 1. 製作扭曲的新 UV


     * 1.1 新的 U 的製作方式

      

  -- 這邊不就數學去探討,但我們至少要知道...
           * Dot: 內積

           * Sqrt: 平方根



    * 1.2 新的 V 的製作方式

  -- 這邊不就數學去探討,但我們至少要知道...
           * ATan2: 反切線
           * Tau: 2*PI

* 2. UV移動: 

    * 2.1 將 1 的 U, V 存起來,輸出成新 UV
    * 2.2 開放2個參數來控制 x, y 方向的流動速度

* 3. UV Tiling/Offset: 

    * Texture Transform Node: 指定 Reference Texture 就可以取得/改變上面 Tiling/Offset 的數值

* 4. 疊色_色彩增值: 

  * 4.1 這邊非常單純的只是將最終貼圖結果與一個Color做相乘達到色彩增值效果
  * Color Node: 就是顏色,特別的是可以設定為 HDR,這樣會多一個 Intensity 數值,要爆亮也ok...XD


* Tool: 

找到一些方便計算的工具,老實說我對數學真的一點興趣都沒有,因為我喜歡畫面相關的,但圖學實在無法與數學切割,只好又開始撿回來...Q_Q


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