如何在游戏中找到坐标（三角问题）？ [英] How do I find a coordinate in my game (trigonometry question)?

问题描述

我想找到游戏中某个点的X和Y坐标。



我有一个起点（origo），我有物体的长度（以像素为单位），我有物体的旋转。



换句话说：如果物体躺在地上，X点将是原点+物体的长度，Y点与原点相同。



但如果对象倾斜说55度怎么办？我正试图找到这个物体指向的最近的X和Y位置。



我问的原因是我正在用大炮创造一个游戏应该在这个位置射击，而不是从物体中间射击。





感谢您的任何建议！



Petter



我尝试过：



我看过窦，cosinus和正切数学公式，但不认为它们是适用的，无论如何我不知道怎么用C＃写这个。

解决方案

我自己想出了解决方案。当我绘制直线，角度和坐标系时，我看到与物体长度相反，相应的角度总是90度。



因此，我有90度角，已知角度和两条线的长度之一。

这意味着我可以使用正弦法。



我希望这可以帮助处于相同情况的任何人。



Petter

Hi,

I am trying to find the X and Y coordinates of a certain point in my game.

I have a starting point ("origo"), I have the length of my object (in pixels), and I have the rotation of the object.

In other words: if the object would be lying on the ground the X point would be origo + the length of the object, and the Y point would be the same as origo.

But what if the object is tilted say 55 degrees? I'm trying to locate the nearest X and Y position of where this object points then.

The reason why I ask is that I am creating a game with a cannon and shots that should be fired at this position, not from the middle of the object.


Thanks for any suggestions!

Petter

What I have tried:

I have looked at the sinus, cosinus, and tangent math formulas, but don't think they are applicable, and in any case I don't know how to write this in C#.

解决方案

I came up with the solution myself. When I drew the line, angle, and the coordiante system I saw that opposite the length of the object, the corresponding angle is always 90 degrees.

Thus, I have a 90 degree angle, a known angle, and one of the two lines' length.
This means that I can use the law of sines.

I hope this helps anyone in the same situation.

Petter

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