如何围绕一个点旋转图片框? [英] How do I rotate a picturebox around a point?

问题描述

已解决

我正在尝试模拟一个旋转恒星的行星.我目前知道移动图片框的语法 (我将其放在计时器中，因此可以重复执行)

private void rotate_timer(object sender, EventArgs e) {
picturebox1.location = new point (picturebox1.location.x + 1,           
picturebox1.location.y + 1);
}

但是我不知道从哪里开始，以便它围绕特定点旋转. 我将如何绕(0,0)旋转?

解决方案

这可能会有所帮助:

float angle = 0;
float rotSpeed = 1;
Point origin = new Point(222, 222);  // your origin
int distance = 100;                  // your distance

private void timer1_Tick(object sender, EventArgs e)
{
    angle += rotSpeed;
    int x = (int)(origin.X + distance * Math.Sin(angle *Math.PI / 180f));
    int y = (int)(origin.Y + distance * Math.Cos(angle *Math.PI / 180f));
    yourControl.Location = new Point(x, y);
}

选择计时器Interval，不要失望，它看起来会有些不均匀. Winforms在动画方面真的很烂.

如果您还希望图像旋转，则可以找到 解决方案

This may help:

float angle = 0;
float rotSpeed = 1;
Point origin = new Point(222, 222);  // your origin
int distance = 100;                  // your distance

private void timer1_Tick(object sender, EventArgs e)
{
    angle += rotSpeed;
    int x = (int)(origin.X + distance * Math.Sin(angle *Math.PI / 180f));
    int y = (int)(origin.Y + distance * Math.Cos(angle *Math.PI / 180f));
    yourControl.Location = new Point(x, y);
}

Pick your timer Interval and don't be disappointed that it will look a little uneven. Winforms is really bad at animation..

If you want the image to rotate as well you can find an example here.

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