利用Box2D+WCK賦予Flash物理特性 萬有引力

這已經是第五篇Box2D+WCK的介紹文章了,前面幾篇文章如果各位有注意應該會發現,所有範例的萬有引力都跟現在我們生活的環境一樣,物件像是被地心引力給吸引著都會往下方掉落,其實我們在使用這個模組的時候,也可以改變這樣的萬有引力,讓這些物件不要往下掉落而是往我們所指定的方向移動,馬老師在這邊大概製作了三種不同類型的萬有引力範例,分述如下:

1.容器型萬有引力:這個萬有引力是利用一個封閉的空間來繪製的。

Capsule Gravity

大概的製作步驟如下:

我們可以在World元件中繪製一個如下圖的形狀:

Capsule Gravity Zone

接下來將他轉換成一個影片片段,在類別的部分輸入gravity.GravityCapsule的名稱,如下圖所示:

Capsule Gravity Symbol

接下來把這個元件拖曳到World元件裡面就可以了。

2.放射狀萬有引力:這種萬有引力是以往內或往外放射狀的方式存在。

Radial Gravity

我們可以在World元件中繪製一個如下圖的形狀:

Radial Gravity Zone

接下來將他轉換成一個影片片段,在類別的部分輸入gravity.GravityRadial的名稱,如下圖所示:

Radial Gravity Symbol

接下來把這個元件拖曳到World元件裡面就可以了。

3.正弦萬有引力:就是三角函數的sin。

Sine Gravity

我們可以在World元件中繪製一個如下圖的形狀:

Sine Gravity Zone

接下來將他轉換成一個影片片段,在類別的部分輸入gravity.GravitySine的名稱,如下圖所示:

Sine Gravity Symbol

接下來把這個元件拖曳到World元件裡面就可以了。

同樣的也讓大家可以下載以上的三個範例檔,範例檔為CS5格式,下載後要重新設定來源路徑和元件庫路徑喔!希望這個範例對大家有所幫助,如果還有疑問,也可以在這邊回應唷~

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