在縮放對象內找到正確的比例值以保持視頻的高寬比

Question

我在另一個動畫片段內有視頻。當我全屏時，我會放大外部動畫片段以適合屏幕。因此，OuterMovieClip.width等於screenWidth等。如何保持我的視頻的縱橫比，使其不會扭曲？什麼是適當的數學呢？

謝謝。

Answer 1

我相信你會需要沿東西線（以下未測試的代碼）...

var screen_aspect_ratio = Screen.Width/Screen.Height; 
var outer_aspect_ratio = OuterMovieClip.Width/OuterMovieClip.Height; 
var new_outer_width; 
var new_outer_height; 

if (screen_aspect_ratio > outer_aspect_ratio) { 
    new_outer_height = Screen.Height; 
    new_outer_width = (Screen.Height * OuterMovieClip.Width)/OuterMovieClip.Height; 
} else { 
    new_outer_width = Screen.Width; 
    new_outer_height = (Screen.Width * OuterMovieClip.Height)/OuterMovieClip.Width; 
} 

OuterMovieClip.Width = new_outer_width; 
OuterMovieClip.Height = new_outer_height;