有人可以帮我解决几何变换问题吗？
我需要在两个给定点之间绘制圆弧。我还有圆弧的半径。我知道这可以使用标准 canvas API 来完成，但我也需要处理椭圆弧的情况。这段代码是一个通用的解决方案。现在唯一的问题是它不起作用！
此代码背后的数学概念位于 https://math。 stackexchange.com/questions/53093/how-to-find-the-the-center-of-an-ellipse。
我的 JS 代码就是它的实现。我的 JS 代码可以在 http://jsfiddle.net/BkEnz/2/ 找到。理想情况下，两个圆圈都应该穿过两个粉红色的小点。
我希望有人能指出我正确的方向。过去几天我一直在努力解决这个问题！
I need to draw a circular arc between two given points. I also have the arc's radius. I understand that this can be done using standard canvas APIs but I need to handle the case of elliptical arcs too. This code is a generalized solution. The only problem right now is that it doesn't work!
The mathematical concept behind this code is at https://math.stackexchange.com/questions/53093/how-to-find-the-center-of-an-ellipse.
My JS code is implementation of that. My JS code can be found at http://jsfiddle.net/BkEnz/2/. Ideally both the circles there should pass through the two little pink dots.
I hope somebody can point me towards the right direction. I have been trying to solve this for past few days now!
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修复了这个问题。更正后的工作代码位于 http://jsfiddle.net/ZxRBT。
请注意，
在我之前版本的代码中，这一行是
因此，当我计算
C1和C2的值时，使用以下代码我还应用了
sr合成在R1x,R1y和R2x,R2y上，但这些点已经在sr坐标中。这是一个严重的错误，我很长一段时间都忽略了它。
Fixed this issue. The corrected working code is at http://jsfiddle.net/ZxRBT.
Notice the line
In my previous version of the code this line was
So when I was calculating the value of
C1andC2, using the following codeI was also applying the
srcomposition overR1x,R1yandR2x,R2y, but these points were already insrcoordinate.This was a grave mistake which I overlooked for really a long time.