标题: 【求助】如何获得曲面的包容矩形 [打印本页] 作者: liyan 时间: 2003-11-2 20:37 标题: 【求助】如何获得曲面的包容矩形 我有个问题，希望大家帮帮我！
在ug中有没有函数能获得给定的曲面的包容矩形的大小？（在xyz方向上）作者: mazhiguo 时间: 2003-11-4 10:56
看一下这个函数中的参数double box[] 的解释，是否是你需要的！！
extern UFUNEXPORT int UF_MODL_ask_face_data(
tag_t face ,/* <I>
Face obj_id
*/
int * type ,/* <O>
Face type is UG surface type code
16 = cylinder
17 = cone
18 = sphere
19 = revolved
20 = extruded
22 = bounded plane
23 = fillet (blend)
43 = b-surface
65 = offset surface
66 = foreign surface
*/
double point[] ,/* <O>
 oint information is returned according to the value
of type as follows.
 lane = Position in plane
Cylinder= Position on axis
Cone = Position on axis
Sphere = Center position
Torus = Center position
Revolved = Position on axis
*/
double dir[] ,/* <O>
Direction information is returned according to the
value of type as follows.
 lane = Normal direction
Cylinder= Axis direction
Cone = Axis direction
Torus = Axis direction
Revolved = Axis direction
*/
double box[] ,/* <O>
Face boundary. The coordinates of the opposite
corners of a rectangular box with sides parallel to X,
Y, and Z axes (Absolute Coordinate System) are
returned. The box contains the specified face and is
usually close to the minimum possible size, but this
is not guaranteed.
box[0] = Xmin
box[1] = Ymin
box[2] = Zmin
box[3] = Xmax
box[4] = Ymax
box[5] = Zmax
*/
double * radius ,/* <O>
Face major radius:
For a cone, the radius is taken at the point[3]
position on the axis.
For a torus, the radius is taken at the major axis.
*/
double * rad_data ,/* <O>
Face minor radius: only a torus or cone has rad_data as
a minor radius.
For a cone, rad_data is the half angle in radians.
For a torus, rad_data is taken at the minor axis.
*/
int * norm_dir /* <O>
Face normal direction: +1 if the face normal is in the
same direction as the surface normal (cross product of
the U- and V-derivative vectors), -1 if reversed.
*/
);
oint information is returned according to the value