[英]How can I rotate an RectangleF at a specific degree using Graphics object?
I have tried this: 我试过这个:
g.RotateTransform(degrees);
But nothing happens.I have one graphics object and one rectangle object witch im drawing using this method: 但没有任何反应。我有一个图形对象和一个矩形对象使用此方法绘图:
g.FillRectangle(new TextureBrush(Image.FromFile(@"D:\LOVE&LUA\Pictures\yellowWool.png")), rectangle);
And i need to rotate the rectangle somehow and draw it again. 我需要以某种方式旋转矩形并再次绘制它。
Answer with code sample please and with a simple explanation. 请用代码示例回答并简单解释一下。
EDIT: Here is the actual code I'm using: 编辑:这是我正在使用的实际代码:
public void Draw(Graphics g,PointF location,Color clearColor)
{
rectangle.Location = location;
g.Clear(clearColor);
g.RotateTransform(10);
//g.FillRectangle(new SolidBrush(Color), rectangle);
g.FillRectangle(new TextureBrush(Image.FromFile(@"D:\LOVE&LUA\Pictures\yellowWool.png")), rectangle);
}
Each frame I call this function and I'm using form's Paint event's e.Graphics
object for the Graphics and i have a timer
witch only calls this.Refresh();
每个框架我调用这个函数,我正在使用窗体的Paint事件的
e.Graphics
对象的图形,我有一个timer
只会调用this.Refresh();
EDIT 2: OK I have played a little with the transformations and g.RotateTransform
rotates the whole cordinate system of the graphycs object and i need to rotate only the rectangle without changing the cordinate system 编辑2:好的我已经玩了一些转换和
g.RotateTransform
旋转graphycs对象的整个坐标系统我需要只旋转矩形而不改变坐标系
You can try using a matrix with the RotateAt
method to center the rotation around the rectangle: 您可以尝试使用带有
RotateAt
方法的矩阵来围绕矩形居中旋转:
using (Matrix m = new Matrix()) {
m.RotateAt(10, new PointF(rectangle.Left + (rectangle.Width / 2),
rectangle.Top + (rectangle.Height / 2)));
g.Transform = m;
using (TextureBrush tb = new TextureBrush(Image.FromFile(@"D:\LOVE&LUA\Pictures\yellowWool.png"))
g.FillRectangle(tb, rectangle);
g.ResetTransform();
}
The ResetTransform()
will turn the graphics back to normal processing after that. 之后,
ResetTransform()
会将图形恢复为正常处理。
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