转换后获取旋转对象的宽度和高度 [英] Get the width and height of rotated object after transform

问题描述

这个问题是对该问题的后续:变换后的宽度/高度.

我要发布一个新问题，因为该问题仅能解决宽度，而不能解决高度. 公式:

var x = $('#box').width()*Math.cos(rotationAngle) 
      + $('#box').height()*Math.sin(rotationAngle);

对于宽度来说效果很好，计算高度的等效公式是什么?

谢谢.

解决方案

这是我想出的最佳工作公式:

var h = $(obj).height() * Math.abs(Math.cos(deg)) + $(obj).width() * Math.abs(Math.sin(deg));
var w = $(obj).width() * Math.abs(Math.cos(deg)) + $(obj).height() * Math.abs(Math.sin(deg));

This question is a followup to the question: width/height after transform.

I am posting a new question because that question only solves the width and not the height. The formula:

var x = $('#box').width()*Math.cos(rotationAngle) 
      + $('#box').height()*Math.sin(rotationAngle);

works well for the width, what is the equivalent formula to calculate the height?

Thanks.

解决方案

This is the best working formula I have come up with:

var h = $(obj).height() * Math.abs(Math.cos(deg)) + $(obj).width() * Math.abs(Math.sin(deg));
var w = $(obj).width() * Math.abs(Math.cos(deg)) + $(obj).height() * Math.abs(Math.sin(deg));

这篇关于转换后获取旋转对象的宽度和高度的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！