如何使精灵指向鼠标.XNA C# [英] How to make a sprite point at the mouse. XNA C#

问题描述

如果你看这个图链接文本，我需要只知道直角三角形所有边的长度就可以找到角A.

If you would look at this diagram link text, I need to find angle A by only knowing the length of all sides of a right triangle.

我不知道三角函数，需要一些帮助.

I don't know trig and need some help.

推荐答案

您的帖子中实际上有 2 个问题.

There are actually 2 questions in your post.

如何使精灵指向鼠标.XNA C#:

How to make a sprite point at the mouse. XNA C#:

您必须计算精灵位置和鼠标位置之间的方向.这可以使用三角函数来完成.在这种情况下:Arctangens2

You will have to calculate the direction between the position of the sprite and the position of the mouse. This can be done using trigonometry functions. In this case: Arctangens2

那么让我们使用数学库:

So let's use the math library:

MouseState mouseState = Mouse.GetState();
Math.Atan2((double)mouseState.Y - sprite.Y, (double)mouseState.X - sprite.X); //this will return the angle(in radians) from sprite to mouse.

在您的三角学示例中，您将看到这些值实际上是:

In your trigonometry example you will see that those values actually are:

Math.Atan2(BC, AC);

或

Math.Atan2(Ydiff, Xdiff);

我希望这有帮助 =D

干杯，

TomHashNL

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