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创建螺旋扫掠体的示例代码

以下 CreateHelical 为自定义函数，功能为创建一条螺旋线，并将该螺旋线作为引导线，相关函数原型可以参考帖子：https://www.ugapi.com/thread-10037.html

示例代码：

tag_t helicalTag =  CreateHelical(strVal, origin, xd, yd);


UF_CURVE_line_t
    line_coords;
UF_STRING_t
    s_guide,
    s_section,
    s_law,
    s_spine;
UF_METHOD_t
    orientation,
    scaling;
int
    alignment = 1,
    body_type = 1,
    inter = UF_MODL_LINEAR;
double
    tol[3] = { 0, 0, 0 };
tag_t
    body_id;

/*  创建导向曲线 */
UF_MODL_init_string_list(&s_guide);
UF_MODL_create_string_list(1, 1, &s_guide);
s_guide.num = 1;

s_guide.string[0] = 1;
s_guide.dir[0] = 1;

s_guide.id[0] = helicalTag; //将前面创建的螺旋线作为引导线

/*  创建截面曲线 */
UF_MODL_init_string_list(&s_section);
UF_MODL_create_string_list(1, 4, &s_section);
s_section.num = 1;
s_section.string[0] = 4;
s_section.dir[0] = 1;

line_coords.start_point[0] = 0.0;
line_coords.start_point[1] = 0.0;
line_coords.start_point[2] = 0.0;
line_coords.end_point[0] =0.0;
line_coords.end_point[1] =0.0;
line_coords.end_point[2] =0.0;

line_coords.end_point[1] = 1;
UF_CURVE_create_line (&line_coords, &s_section.id[0] );

UF_VEC3_copy(line_coords.end_point, line_coords.start_point);
line_coords.end_point[2] = 1;
UF_CURVE_create_line (&line_coords, &s_section.id[1] );

UF_VEC3_copy(line_coords.end_point, line_coords.start_point);
line_coords.end_point[1] = 0;
UF_CURVE_create_line (&line_coords, &s_section.id[2] );

UF_VEC3_copy(line_coords.end_point, line_coords.start_point);
line_coords.end_point[2] = 0;
UF_CURVE_create_line (&line_coords, &s_section.id[3] );

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UF_MODL_create_sweep ( &s_guide,
    &s_section,
    &s_spine,
    &orientation,
    &scaling,
    &alignment,
    &inter,
    &body_type,
    UF_NULLSIGN,
    tol,
    &body_id );

UF_MODL_free_string_list(&s_guide);
UF_MODL_free_string_list(&s_section);
UF_MODL_free_string_list(&s_spine);
UF_MODL_free_string_list(&s_law);