一、概述
最近体验许多外挂，包括胡波外挂、星空外挂及模圣等都有抽取面的中心线，由于刚刚学习，我尝试看看能不能做出来，本博客代码没有封装函数，代码有待改进，但基本可以实现相应的功能。
二、案例实现的功能
1、可以抽取平面的中心线，主要利用面上的UV线；
2、可以抽取柱面的中心线，这里方法有很多我的思路是识别柱面上的两个圆弧，获得两段圆弧的中心坐标，然后连线。
3、适用范围：目前有三类
图1 平面类型
图2 圆柱面类型
图3 标准圆弧类型
非标准圆弧类型目前只想到用抽取虚拟曲线来实现，下一篇博客写
三、代码说明以及详细注解
//NXOpen_CreateFaceCentreLine
// Mandatory UF Includes
#include <uf.h>
#include <uf_object_types.h>
// Internal Includes
#include <NXOpen/ListingWindow.hxx>
#include <NXOpen/NXMessageBox.hxx>
#include <NXOpen/UI.hxx>
// Internal+External Includes
#include <NXOpen/Annotations.hxx>
#include <NXOpen/Assemblies_Component.hxx>
#include <NXOpen/Assemblies_ComponentAssembly.hxx>
#include <NXOpen/Body.hxx>
#include <NXOpen/BodyCollection.hxx>
#include <NXOpen/Face.hxx>
#include <NXOpen/Line.hxx>
#include <NXOpen/NXException.hxx>
#include <NXOpen/NXObject.hxx>
#include <NXOpen/Part.hxx>
#include <NXOpen/PartCollection.hxx>
#include <NXOpen/Session.hxx>
// Std C++ Includes
#include <iostream>
#include <sstream>
//用户定义
#include "uf_all.h"
#include <vector>
using namespace NXOpen;
using std::string;
using std::exception;
using std::stringstream;
using std::endl;
using std::cout;
using std::cerr;
static int init_proc(UF_UI_selection_p_t select, void *user_data)
{
int errorCode = 0;
int num_triples = 1; //选择类型 数量
UF_UI_mask_t mask_triples[1] = { { UF_face_type , 0,0 } //定义选择面类型
};
errorCode = UF_UI_set_sel_mask(select,
UF_UI_SEL_MASK_CLEAR_AND_ENABLE_SPECIFIC,
num_triples,
mask_triples);
if (errorCode == 0)
{
return UF_UI_SEL_SUCCESS;
}
else
{
return UF_UI_SEL_FAILURE;
}
}
//------------------------------------------------------------------------------
// NXOpen c++ test class
//------------------------------------------------------------------------------
class MyClass
{
// class members
public:
static Session *theSession;
static UI *theUI;
MyClass();
~MyClass();
void do_it();
void print(const NXString &);
void print(const string &);
void print(const char*);
private:
BasePart *workPart, *displayPart;
NXMessageBox *mb;
ListingWindow *lw;
LogFile *lf;
};
//------------------------------------------------------------------------------
// Initialize static variables
//------------------------------------------------------------------------------
Session *(MyClass::theSession) = NULL;
UI *(MyClass::theUI) = NULL;
//------------------------------------------------------------------------------
// Constructor
//------------------------------------------------------------------------------
MyClass::MyClass()
{
// Initialize the NX Open C++ API environment
MyClass::theSession = NXOpen::Session::GetSession();
MyClass::theUI = UI::GetUI();
mb = theUI->NXMessageBox();
lw = theSession->ListingWindow();
lf = theSession->LogFile();
workPart = theSession->Parts()->BaseWork();
displayPart = theSession->Parts()->BaseDisplay();
}
//------------------------------------------------------------------------------
// Destructor
//------------------------------------------------------------------------------
MyClass::~MyClass()
{
}
//------------------------------------------------------------------------------
// Print string to listing window or stdout
//------------------------------------------------------------------------------
void MyClass::print(const NXString &msg)
{
if(! lw->IsOpen() ) lw->Open();
lw->WriteLine(msg);
}
void MyClass::print(const string &msg)
{
if(! lw->IsOpen() ) lw->Open();
lw->WriteLine(msg);
}
void MyClass::print(const char * msg)
{
if(! lw->IsOpen() ) lw->Open();
lw->WriteLine(msg);
}
//------------------------------------------------------------------------------
// Do something
//------------------------------------------------------------------------------
void MyClass::do_it()
{
// TODO: add your code here
L10:
// TODO: add your code here
int response = 0;
tag_t object = NULL_TAG;
double cursor[3];
tag_t view = NULL_TAG;
UF_UI_select_with_single_dialog("提示：请选择面", "选择面", UF_UI_SEL_SCOPE_WORK_PART, init_proc, NULL, &response, &object, cursor, &view);
if (response == UF_UI_OK || response == UF_UI_OBJECT_SELECTED || response == UF_UI_OBJECT_SELECTED_BY_NAME)
{
UF_DISP_set_highlight(object, 0);
//判断面的类型
int faceType = 0;
UF_MODL_ask_face_type(object, &faceType);
if (faceType == UF_MODL_CYLINDRICAL_FACE)
{
//面找边
uf_list_p_t list;
tag_t edge1Tag = NULL_TAG;
tag_t edge1Tag2 = NULL_TAG;
UF_CURVE_line_t line1;
tag_t line1TAG = NULL_TAG;
int count = 0;
UF_MODL_ask_face_edges(object, &list);//得到面的边
UF_MODL_ask_list_count(list, &count);//查询链表数量
std::vector<tag_t> edgeTAG;
for (int j = 0; j < count; j++)
{
UF_MODL_ask_list_item(list, j, &edge1Tag);//得到边的tag
//判断边的类型
int edge_type;
UF_MODL_ask_edge_type(edge1Tag, &edge_type);
if (edge_type == UF_MODL_CIRCULAR_EDGE)
{
/*****************************************
UF_MODL_LINEAR_EDGE 线性边
UF_MODL_CIRCULAR_EDGE 圆形边
UF_MODL_ELLIPTICAL_EDGE 椭圆形边
UF_MODL_INTERSECTION_EDGE 相交边
UF_MODL_SPLINE_EDGE 样条边
UF_MODL_SP_CURVE_EDGE 曲线边
UF_MODL_FOREIGN_EDGE 外边缘
UF_MODL_CONST_PARAMETER_EDGE 参数边
UF_MODL_TRIMMED_CURVE_EDGE 裁剪曲线边
******************************************/
edgeTAG.push_back(edge1Tag);
}
if (edgeTAG.size() == 2)
{
//UF_CURVE_ask_centroid(edgeTAG[0], centroid1);//得到第一条边的中心坐标
//UF_CURVE_ask_centroid(edgeTAG[1], centroid2);//得到第二条边的中心坐标
UF_CURVE_arc_t arc_coords1, arc_coords2;
UF_CURVE_ask_arc_data(edgeTAG[0], &arc_coords1);
UF_CURVE_ask_arc_data(edgeTAG[1], &arc_coords2);
double douMatrixValue1[9];
UF_CSYS_ask_matrix_values(arc_coords1.matrix_tag, douMatrixValue1);
double douPoint1[3];
UF_MTX3_vec_multiply_t(arc_coords1.arc_center, douMatrixValue1, douPoint1);
double douMatrixValue2[9];
UF_CSYS_ask_matrix_values(arc_coords2.matrix_tag, douMatrixValue2);
double douPoint2[3];
UF_MTX3_vec_multiply_t(arc_coords2.arc_center, douMatrixValue2, douPoint2);
//画直线
line1.start_point[0] = douPoint1[0];
line1.start_point[1] = douPoint1[1];
line1.start_point[2] = douPoint1[2];
line1.end_point[0] = douPoint2[0];
line1.end_point[1] = douPoint2[1];
line1.end_point[2] = douPoint2[2];
UF_CURVE_create_line(&line1, &line1TAG);
UF_OBJ_set_color(line1TAG, 186);
UF_OBJ_set_font(line1TAG, UF_OBJ_FONT_CENTERLINE);
//移动放置图层
UF_OBJ_set_layer(line1TAG, 5);
}
}
UF_free(list);
goto L10;
}
else if (faceType == UF_MODL_PLANAR_FACE)
{
double uv_min_max1[4];
UF_MODL_ask_face_uv_minmax(object, uv_min_max1);
double parameter1 = (uv_min_max1[0] + uv_min_max1[1]) / 2;
double parameter2 = (uv_min_max1[2] + uv_min_max1[3]) / 2;
tag_t * isocurve_id1, *isocurve_id2;
int isocurve_cnt1 = 0;
int isocurve_cnt2 = 0;
UF_MODL_create_isocurve(object, 1, parameter1, 0.01, &isocurve_id1, &isocurve_cnt1);
UF_MODL_create_isocurve(object, 2, parameter2, 0.01, &isocurve_id2, &isocurve_cnt2);
UF_OBJ_set_color(isocurve_id1[0], 186);
UF_OBJ_set_color(isocurve_id2[0], 186);
UF_OBJ_set_font(isocurve_id1[0], UF_OBJ_FONT_CENTERLINE);
UF_OBJ_set_font(isocurve_id2[0], UF_OBJ_FONT_CENTERLINE);
//移动放置图层
UF_OBJ_set_layer(isocurve_id1[0], 5);
UF_OBJ_set_layer(isocurve_id2[0], 5);
UF_free(isocurve_id1);
UF_free(isocurve_id2);
double param[2] = { 0 };
param[0] = parameter1;
param[1] = parameter2;
double point[3] = { 0 };
double u1[3] = { 0 };
double v1[3] = { 0 };
double u2[3] = { 0 };
double v2[3] = { 0 };
double unit_norm[3] = { 0 };
double radii[2] = { 0 };
UF_MODL_ask_face_props(object, param, point, u1, v1, u2, v2, unit_norm, radii);
tag_t facePoint;
UF_CURVE_create_point(point, &facePoint);
goto L10;
}
else
{
uc1601("请正确选择面！", 1);
goto L10;
}
}
}
//------------------------------------------------------------------------------
// Entry point(s) for unmanaged internal NXOpen C/C++ programs
//------------------------------------------------------------------------------
// Explicit Execution
extern "C" DllExport void ufusr( char *parm, int *returnCode, int rlen )
{
UF_initialize();
try
{
// Create NXOpen C++ class instance
MyClass *theMyClass;
theMyClass = new MyClass();
theMyClass->do_it();
delete theMyClass;
}
catch (const NXException& e1)
{
UI::GetUI()->NXMessageBox()->Show("NXException", NXOpen::NXMessageBox::DialogTypeError, e1.Message());
}
catch (const exception& e2)
{
UI::GetUI()->NXMessageBox()->Show("Exception", NXOpen::NXMessageBox::DialogTypeError, e2.what());
}
catch (...)
{
UI::GetUI()->NXMessageBox()->Show("Exception", NXOpen::NXMessageBox::DialogTypeError, "Unknown Exception.");
}
UF_terminate();
}
//------------------------------------------------------------------------------
// Unload Handler
//------------------------------------------------------------------------------
extern "C" DllExport int ufusr_ask_unload()
{
return (int)NXOpen::Session::LibraryUnloadOptionImmediately;
}
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