WPF:在随机点渲染画布 [英] WPF: Rendering a canvas at Random Points
问题描述
参考此我正在开发的编程游戏.
游戏开始时，我在画布上的随机点上生成了这些机器人，乍一看(同时添加一个或两个机器人)，这似乎可以正常工作.
When the game is started, I am generating these robots at supposingly random points on a Canvas, and at first look (adding one or two bots at the same time), this seemed to be working as it should.
...但是，当我同时添加大量机器人时，这就是它们在画布上随机"出现的方式:
...but, when I added a ton of bots at the same time, this is how they where "randomly" appeared on the canvas:
替代文字http://img22.imageshack.us/img22/6895/randombotpositionlf7 .jpg
所谓的随机点毕竟似乎并不是那么随机...它们只是直线上的点！
The supposedly random points don't seem that random after all...they're just points of a straight line!
这是我计算积分的方式:
Here is how I am calculating the Points:
SetStartingPoint(GetRandomPoint(ArenaWidth, ArenaHeight)); //the width and height are 550, 480 at the moment
//which calls:
private Point GetRandomPoint(double maxWidth, double maxHeight)
{
return new Point(new Random().Next(0, (int)(maxWidth-80)), new Random().Next(0, (int)maxHeight));
}
//and ultimately:
private void SetStartingPoint(Point p)
{
Translate_Body.X = (double)p.X;
Translate_Body.Y = (double)p.Y;
}
关于上面的代码，Translate_Body是机械手(canvas)的TranslateTransform类型，因此通过分配其X和Y属性，它将其位置更改为新值
As regards the above code, Translate_Body is of type TranslateTransform of the robot (canvas), so by assigning its X and Y properties, it will change its position to the new values
我在这里想念什么?
[UPDATE]解决方案:
问题就像大家都建议的那样，由于使用了新的实例化，因此无法正确植入数字.
The problem was like you all suggested, the numbers weren't being seeded properly because of the new instantiations.
我现在将代码更改为使用单个Random变量，并从中植入所有点.
I now changed the code to use a single Random variable and to seed all the points from it.
但是我仍然不明白为什么这些点是在看似直线的坐标线上生成的. 有人可以解释吗?
But I still can't understand why the points where being generated at a seemingly straight line of coordinates. Is anyone able to explain this ?
推荐答案
我相信问题在于您的随机数没有正确植入种子.使用随机的单个实例，而不是多个实例，您应该会看到很多改进.
I believe the problem is that your random numbers aren't being seeded properly. Use a single instance of Random, rather than multiple ones, and you should see much improvement.
用户添加了为什么它们在一条直线上"-可能是由于基于种子生成的随机数的默认级数. 维基百科是一个不错的起点-我不是数学专家，所以不会尝试解释随机数世界的核心. :)
User added "why they were in a straight line" -- probably because of the default progression of the generated random numbers based on the seed. wikipedia would be a good place to start -- I'm no math expert, so won't try to explain the core of the world of random numbers. :)
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