c# - 模型中心Visual3D

Question

我有一个 ModelVisual3D，里面有一些立方体。如果我想按中心旋转整个组，我该怎么做？

这是我的代码:

RotateTransform3D rt;
AxisAngleRotation3D ar;
Transform3DGroup grp;

rt = new RotateTransform3D();
ar = new AxisAngleRotation3D();                     

ar.Axis = new Vector3D(1, 0, 0);
ar.Angle = x; //x a value 0-360
rt.Rotation = ar;
rt.CenterX = //*Here i need the center of the ModelVisual3D X*
rt.CenterY = //*Here i need the center of the ModelVisual3D Y*
rt.CenterZ = //*Here i need the center of the ModelVisual3D Z*

grp = new Transform3DGroup();
grp.Children.Add(rt);

cubes.Transform = grp; //cubes is the ModelVisual3D object that i want to rotate

Answer 1

您可以计算所有点的平均值。 P 代码:

Point avg
for (point in points)
    avg = avg + point
    ++count

avg /= count

这就是您的中心。

在简单的物理模拟中，您会为每个点添加一个权重。