标题: 请问这段英问的意思 [打印本页] 作者: chijin 时间: 2003-5-29 17:19 标题: 请问这段英问的意思 请问这段英问的意思
HV plane calculation in relation to selected plane:
The normal of the working support is the same as the principal normal of the plane checked. You choose zx
plane, the PRINCIPAL NORMAL is Y
The first vector H is defined as follow : H= Z x N ( x means vectorial product). N is the normal vector y in our
case. H = -X.
The second vector V is defined as V = N x H. Don't forget that H;V;N must make a direct trihedron. Since V5 R7
you can reorient the axis system in the work support but the axis system must be direct. So changing one vector
H, change the other.作者: wangxingyun 时间: 2003-5-30 08:03
HV 平面与你所选择的平面相关：
工作支持面的法线方向与现在被点中平面的主法线方向一致。如果你选中zx平面，则主法线方向为y
第一个矢量H如此定义：H=ZxN(x为矢量乘积 注：遵循右手定则），在我们这个例子中N就是y，H=-X
第二个矢量V定义为V=NxH.但要记住:H,V,N构成三维直角坐标系。从V5 R7 开始你可以在工作支持面内重置坐标系，但是只限于直角坐标。所以当你改变H矢量时，另一个也要改变。