GUILayoutUtility.GetAspectRect
static function GetAspectRect(aspect: float): Rect;
static function GetAspectRect(aspect: float, style: GUIStyle): Rect;
static function GetAspectRect(aspect: float, params options: GUILayoutOption[]): Rect;
static function GetAspectRect(aspect: float, style: GUIStyle, params options: GUILayoutOption[]): Rect;
Parameters

aspect The aspect ratio of the element (width / height).
style An optional style. If specified, the style's padding value will be added to the sizes of the returned rectangle & the style's margin values will be used for spacing.
options An optional list of layout options that specify extra layouting properties. Any values passed in here will override settings defined by the style.
See Also: GUILayout.Width, GUILayout.Height, GUILayout.MinWidth, GUILayout.MaxWidth, GUILayout.MinHeight, GUILayout.MaxHeight, GUILayout.ExpandWidth, GUILayout.ExpandHeight.
Returns
Rect The rect for the control.
Description

Reserve layout space for a rectangle with a specific aspect ratio.