NX二次开发创建实体最小包容块

环境：Win7 x64,VS2015,NX12

内容：创建实体最小包容块

实现原理：

根据输入对象，创建一个辅助实体，然后遍历实体所有平面上的直线边，

以直线边和面法向创建坐标系，求此坐标系下求到的包容块体积，包容块最小者就是合适的坐标系。

代码：

#include <NXOpen/BasePart.hxx>
#include <NXOpen/CartesianCoordinateSystem.hxx>
#include <NXOpen/DisplayableObject.hxx>
#include <NXOpen/Layer_LayerManager.hxx>
#include <NXOpen/ModelingView.hxx>
#include <NXOpen/ModelingViewCollection.hxx>
#include <NXOpen/NXException.hxx>
#include <NXOpen/Part.hxx>
#include <NXOpen/PartCollection.hxx>
#include <NXOpen/Session.hxx>
#include <NXOpen/TaggedObject.hxx>
#include <NXOpen/View.hxx>
#include <NXOpen/WCS.hxx>
#include <NXOpen\NXObject.hxx>
#include <NXOpen\Point.hxx>
#include <NXOpen\PointCollection.hxx>
#include <UF_EVAL.h>
#include <UF_LAYER.h>
#include <UF_MTX.h>
#include <UF_VEC.h>
#include <iostream>
#include <string.h>
#include <strstream>
#include <uf.h>
#include <uf_csys.h>
#include <uf_defs.h>
#include <uf_exit.h>
#include <uf_modl.h>
#include <uf_obj.h>
#include <uf_part.h>
#include <uf_trns.h>
#include <uf_ui.h>
using namespace NXOpen;const double tol = 0.01;
const double maxValue = 99999999.99;double GetDisTol()
{double tol = 0.0001;int err_flag = 0;UF_MODL_ask_distance_tolerance(&tol);return tol;
}bool SetDisTol(double tol)
{int err_flag = -1;UF_MODL_set_distance_tolerance(&tol, &err_flag);return (err_flag == 0);
}bool IsZero(double val)
{return (fabs(val) < tol);
}double CalVolume(double lengthWidthHeight[3])
{return lengthWidthHeight[0] * lengthWidthHeight[1] * lengthWidthHeight[2];
}double GetMinVolume(double lengthWidthHeight[3])
{ double stand = 10000.0;double vol = CalVolume(lengthWidthHeight);if (vol >stand){vol /= stand;}return vol;
}static int init_proc(UF_UI_selection_p_t select, void *user_data)
{//int  errorCode = 0;//int  num_triples = 2; //UF_UI_mask_t mask_triples[] = { UF_solid_type,UF_solid_face_subtype,UF_UI_SEL_FEATURE_BODY,UF_face_type,UF_solid_face_subtype,UF_UI_SEL_NOT_A_FEATURE }; //定义选择类型//errorCode = UF_UI_set_sel_mask(select, UF_UI_SEL_MASK_CLEAR_AND_ENABLE_SPECIFIC, num_triples, mask_triples);int  errorCode = 0;int  num_triples = 1;UF_UI_mask_t mask_triples[] = { UF_solid_type,UF_solid_face_subtype,UF_UI_SEL_FEATURE_BODY }; //定义选择类型errorCode = UF_UI_set_sel_mask(select, UF_UI_SEL_MASK_CLEAR_AND_ENABLE_SPECIFIC, num_triples, mask_triples);return  (errorCode == 0);
}std::vector<tag_t> GetSelectedBodies()
{char message[132] = "请选择实体";char title[132] = "选择对象";int  scope = UF_UI_SEL_SCOPE_WORK_PART;int  response;int count = 0;tag_p_t objects = NULL_TAG;double  cursor[3] = { 0,0,0 };tag_t view = NULL_TAG;UF_UI_select_with_class_dialog(message, title, scope, init_proc, NULL, &response, &count, &objects);std::vector<tag_t> selectedBodies;for (int i = 0; i < count; ++i){selectedBodies.push_back(objects[i]);}return selectedBodies;
}tag_t GetWCS()
{tag_t csys_id = NULL_TAG;UF_CSYS_ask_wcs(&csys_id);return csys_id;
}void AskCsysInfo(tag_t csys_id, double origin[3], double mtx[9])
{tag_t matrix_id = NULL_TAG; UF_CSYS_ask_csys_info(csys_id, &matrix_id, origin);UF_CSYS_ask_matrix_values(matrix_id, mtx);
}void GetMaxMinEdge(double edges[3], double &maxEdge, double &minEdge)
{std::vector<double> tmpVec;for (int i = 0; i < 3; ++i){tmpVec.push_back(edges[i]);}std::sort(tmpVec.begin(), tmpVec.end());maxEdge = tmpVec[2];minEdge = tmpVec[0];
}void MapPointFromAcsToCS(double csOrg[3], double csMtx[9], double pnt[3])
{UF_VEC3_sub(pnt, csOrg, pnt);UF_MTX3_vec_multiply(pnt, csMtx, pnt);
}void MapPointFromCsToAcs(double csOrg[3], double csMtx[9], double pnt[3])
{UF_MTX3_vec_multiply_t(pnt, csMtx, pnt);UF_VEC3_add(pnt, csOrg, pnt);
}bool AskBoundingBox(double inputOri[3], double inputMat[9], std::vector<tag_t> inputObjects, double output_acs_min_corner[3], double output_acs_max_corner[3], double output_wcs_length_width_height[3])
{if (inputObjects.empty()){return false;}tag_t OriWcs = NULL_TAG;UF_CSYS_ask_wcs(&OriWcs);Point3d origin(inputOri[0], inputOri[1], inputOri[2]);Matrix3x3 matrix(inputMat[0], inputMat[1], inputMat[2],inputMat[3], inputMat[4], inputMat[5], inputMat[6], inputMat[7], inputMat[8]);NXOpen::Session *theSession = NXOpen::Session::GetSession();Part *workPart = theSession->Parts()->Work();workPart->WCS()->SetOriginAndMatrix(origin, matrix);tag_t wcsTag = NULL_TAG;UF_CSYS_ask_wcs(&wcsTag);double objsBoxInWCS[6] = { 0 };for (int i = 0; i < inputObjects.size(); ++i){double min_corner[3] = { 0 };double dir[3][3] = { 0 };double dis[3] = { 0 };UF_MODL_ask_bounding_box_exact(inputObjects[i], wcsTag, min_corner, dir, dis);if (IsZero(fabs(dis[0]) + fabs(dis[1]) + fabs(dis[2]))){continue;}double minPoint[3] = { 0 };double maxPoint[3] = { 0 };minPoint[0] = min_corner[0];minPoint[1] = min_corner[1];minPoint[2] = min_corner[2];maxPoint[0] = min_corner[0] + dir[0][0] * dis[0] + dir[1][0] * dis[1] + dir[2][0] * dis[2];maxPoint[1] = min_corner[1] + dir[0][1] * dis[0] + dir[1][1] * dis[1] + dir[2][1] * dis[2];maxPoint[2] = min_corner[2] + dir[0][2] * dis[0] + dir[1][2] * dis[1] + dir[2][2] * dis[2];MapPointFromAcsToCS(inputOri, inputMat, minPoint);MapPointFromAcsToCS(inputOri, inputMat, maxPoint);double tmpObjBoxInWCS[6] = { 0 };tmpObjBoxInWCS[0] = minPoint[0];tmpObjBoxInWCS[1] = minPoint[1];tmpObjBoxInWCS[2] = minPoint[2];tmpObjBoxInWCS[3] = maxPoint[0];tmpObjBoxInWCS[4] = maxPoint[1];tmpObjBoxInWCS[5] = maxPoint[2];if (i == 0){objsBoxInWCS[0] = tmpObjBoxInWCS[0];objsBoxInWCS[1] = tmpObjBoxInWCS[1];objsBoxInWCS[2] = tmpObjBoxInWCS[2];objsBoxInWCS[3] = tmpObjBoxInWCS[3];objsBoxInWCS[4] = tmpObjBoxInWCS[4];objsBoxInWCS[5] = tmpObjBoxInWCS[5];}else{if (objsBoxInWCS[0] > tmpObjBoxInWCS[0]){objsBoxInWCS[0] = tmpObjBoxInWCS[0];}if (objsBoxInWCS[0] > tmpObjBoxInWCS[3]){objsBoxInWCS[0] = tmpObjBoxInWCS[3];}if (objsBoxInWCS[1] > tmpObjBoxInWCS[1]){objsBoxInWCS[1] = tmpObjBoxInWCS[1];}if (objsBoxInWCS[1] > tmpObjBoxInWCS[4]){objsBoxInWCS[1] = tmpObjBoxInWCS[4];}if (objsBoxInWCS[2] > tmpObjBoxInWCS[2]){objsBoxInWCS[2] = tmpObjBoxInWCS[2];}if (objsBoxInWCS[2] > tmpObjBoxInWCS[5]){objsBoxInWCS[2] = tmpObjBoxInWCS[5];}if (objsBoxInWCS[3] < tmpObjBoxInWCS[0]){objsBoxInWCS[3] = tmpObjBoxInWCS[0];}if (objsBoxInWCS[3] < tmpObjBoxInWCS[3]){objsBoxInWCS[3] = tmpObjBoxInWCS[3];}if (objsBoxInWCS[4] < tmpObjBoxInWCS[1]){objsBoxInWCS[4] = tmpObjBoxInWCS[1];}if (objsBoxInWCS[4] < tmpObjBoxInWCS[4]){objsBoxInWCS[4] = tmpObjBoxInWCS[4];}if (objsBoxInWCS[5] < tmpObjBoxInWCS[2]){objsBoxInWCS[5] = tmpObjBoxInWCS[2];}if (objsBoxInWCS[5] < tmpObjBoxInWCS[5]){objsBoxInWCS[5] = tmpObjBoxInWCS[5];}}}output_wcs_length_width_height[0] = fabs(objsBoxInWCS[3] - objsBoxInWCS[0]);output_wcs_length_width_height[1] = fabs(objsBoxInWCS[4] - objsBoxInWCS[1]);output_wcs_length_width_height[2] = fabs(objsBoxInWCS[5] - objsBoxInWCS[2]);double minPoint[3] = { objsBoxInWCS[0], objsBoxInWCS[1], objsBoxInWCS[2] };double maxPoint[3] = { objsBoxInWCS[3], objsBoxInWCS[4], objsBoxInWCS[5] };MapPointFromCsToAcs(inputOri, inputMat, minPoint);MapPointFromCsToAcs(inputOri, inputMat, maxPoint);output_acs_min_corner[0] = minPoint[0];output_acs_min_corner[1] = minPoint[1];output_acs_min_corner[2] = minPoint[2];output_acs_max_corner[0] = maxPoint[0];output_acs_max_corner[1] = maxPoint[1];output_acs_max_corner[2] = maxPoint[2];UF_CSYS_set_wcs(OriWcs);return true;
}std::vector<tag_t> GetBodyFaces(tag_t body)
{std::vector<tag_t> faces;uf_list_p_t face_list;UF_MODL_create_list(&face_list);UF_MODL_ask_body_faces(body, &face_list); int count = 0;int err = UF_MODL_ask_list_count(face_list, &count);for (int i = 0; i < count; ++i){tag_t tmpFace = NULL_TAG;UF_MODL_ask_list_item(face_list, i, &tmpFace);faces.push_back(tmpFace);}UF_MODL_delete_list(&face_list);return faces;
}std::vector<tag_t> GetFaceEdges(tag_t face)
{std::vector<tag_t> edges;uf_list_p_t edge_list;UF_MODL_create_list(&edge_list);UF_MODL_ask_face_edges(face, &edge_list);int count = 0;int err = UF_MODL_ask_list_count(edge_list, &count);for (int i = 0; i < count; ++i){tag_t tmpEdge = NULL_TAG;UF_MODL_ask_list_item(edge_list, i, &tmpEdge);edges.push_back(tmpEdge);}UF_MODL_delete_list(&edge_list);return edges;
}bool IsPlanarFace(tag_t face)
{int type = 0;int err = UF_MODL_ask_face_type(face, &type);return  (err == 0 && type == UF_MODL_PLANAR_FACE);
}bool GetFaceNormal(tag_t face, double normal[3])
{int type = 0;int err = UF_MODL_ask_face_type(face, &type);if (err != 0){return false;}double uv_min_max[4] = { 0 };UF_MODL_ask_face_uv_minmax(face, uv_min_max); double uvCenter[2] = { 0 };uvCenter[0] = (uv_min_max[0] + uv_min_max[1]) / 2;uvCenter[1] = (uv_min_max[2] + uv_min_max[3]) / 2;double centerPnt[3] = { 0 };double u1[3];   double v1[3]; double u2[3]; double v2[3]; double radii[2]; UF_MODL_ask_face_props(face, uvCenter, centerPnt, u1, v1, u2, v2, normal, radii);return true;
}bool IsLinearEdge(tag_t edge)
{int edge_type = 0;int err = UF_MODL_ask_edge_type(edge, &edge_type);return (err == 0 && edge_type == UF_MODL_LINEAR_EDGE);
}bool GetLinearEdgeEndPnt(tag_t edge, double startPnt[3], double endPnt[3])
{if (!IsLinearEdge(edge)){return false;}double tangent[3] = {0};double p_norm[3] = {0};double b_norm[3] = {0};double torsion = 0;double  rad_of_cur = 0;UF_MODL_ask_curve_props(edge, 0, startPnt, tangent, p_norm, b_norm, &torsion, &rad_of_cur);UF_MODL_ask_curve_props(edge, 1, endPnt, tangent, p_norm, b_norm, &torsion, &rad_of_cur);return true;
}bool GetLinearEdgeMtx(tag_t edge, double faceNormal[3], double mtx[9])
{bool res = false;double startPnt[3] = { 0 };double endPnt[3] = { 0 };if (GetLinearEdgeEndPnt(edge, startPnt, endPnt)){double linearDir[3] = { endPnt[0] - startPnt[0],endPnt[1] - startPnt[1] ,endPnt[2] - startPnt[2] };double magnitude = 0.0;double unitDir[3] = { 0 };UF_VEC3_unitize(linearDir, tol, &magnitude, unitDir);int is_parallelar = -1;UF_VEC3_is_parallel(unitDir, faceNormal, tol, &is_parallelar);if (is_parallelar == 0){int err = UF_MTX3_initialize(unitDir,faceNormal,mtx);res = (err == 0);}}return res;
}Matrix3x3 TransArrayToMat(double mtx[9])
{return Matrix3x3(mtx[0], mtx[1], mtx[2], mtx[3], mtx[4], mtx[5], mtx[6], mtx[7], mtx[8]);
}void TransMatToArray(Matrix3x3 mat, double mtx[9])
{mtx[0] = mat.Xx;mtx[1] = mat.Xy;mtx[2] = mat.Xz;mtx[3] = mat.Yx;mtx[4] = mat.Yy;mtx[5] = mat.Yz;mtx[6] = mat.Zx;mtx[7] = mat.Zy;mtx[8] = mat.Zz;}bool IsMatVecHasMatInParallelOrPerpendicularStyle(std::vector<Matrix3x3> &mats, Matrix3x3 mat)
{double compareMatXAxis[3] = { mat.Xx,mat.Xy, mat.Xz };double compareMatYAxis[3] = { mat.Yx,mat.Yy, mat.Yz };for (int i = 0; i < mats.size(); ++i){double tmpMatXAxis[3] = { mats[i].Xx,mats[i].Xy, mats[i].Xz };double tmpMatYAxis[3] = { mats[i].Yx,mats[i].Yy, mats[i].Yz };int isXXParallel = -1;int isYYParallel = -1;int isXYParallel = -1;int isYXParallel = -1;UF_VEC3_is_parallel(tmpMatXAxis, compareMatXAxis, tol, &isXXParallel);UF_VEC3_is_parallel(tmpMatYAxis, compareMatYAxis, tol, &isYYParallel);UF_VEC3_is_parallel(tmpMatXAxis, compareMatYAxis, tol, &isXYParallel);UF_VEC3_is_parallel(tmpMatYAxis, compareMatXAxis, tol, &isYXParallel);int isXXPerpendicular = -1;int isYYPerpendicular = -1;int isXYPerpendicular = -1;int isYXPerpendicular = -1;UF_VEC3_is_perpendicular(tmpMatXAxis, compareMatXAxis, tol, &isXXPerpendicular);UF_VEC3_is_perpendicular(tmpMatYAxis, compareMatYAxis, tol, &isYYPerpendicular);UF_VEC3_is_perpendicular(tmpMatXAxis, compareMatYAxis, tol, &isXYPerpendicular);UF_VEC3_is_perpendicular(tmpMatYAxis, compareMatXAxis, tol, &isYXPerpendicular);if (isXXParallel && isYYParallel){return true;}if (isXYParallel && isYXParallel){return true;}if (isXXParallel && isYYPerpendicular){return true;}if (isXYParallel && isYXPerpendicular){return true;}if (isYYParallel && isXXPerpendicular){return true;}if (isYXParallel && isXYPerpendicular){return true;}}return false;
}bool CreateWrapGeometry(std::vector<tag_t> bodies,double disTol,tag_t &resultBody)
{resultBody = NULL_TAG;if (bodies.empty()){return false;}tag_t *objects = new tag_t[sizeof(bodies)];memcpy(objects, &bodies[0], bodies.size() * sizeof(tag_t));UF_MODL_wrap_geom_t wrap_data;wrap_data.close_gap = UF_WRAP_GEOM_CLOSE_NONE;wrap_data.dist_tol = disTol;//顶点公差 UG默认2.45 ，越小越精确wrap_data.add_offset = "0";wrap_data.split_offset = "0";wrap_data.num_geoms = bodies.size();wrap_data.geometry = objects;wrap_data.num_splits = 0;wrap_data.splits = NULL_TAG;tag_t feature_tag = NULL_TAG;int err = UF_MODL_create_wrap_geometry(&wrap_data, &feature_tag); if (err == 0){UF_MODL_ask_feat_body(feature_tag, &resultBody);}return (resultBody != NULL_TAG);
}tag_t CreateBlock(double inputOri[3], double inputMat[9],double input_acs_min_corner[3], double edges[3])
{tag_t OriWcs = NULL_TAG;UF_CSYS_ask_wcs(&OriWcs);Point3d origin(inputOri[0], inputOri[1], inputOri[2]);Matrix3x3 matrix(inputMat[0], inputMat[1], inputMat[2], inputMat[3], inputMat[4], inputMat[5], inputMat[6], inputMat[7], inputMat[8]);NXOpen::Session *theSession = NXOpen::Session::GetSession();Part *workPart = theSession->Parts()->Work();workPart->WCS()->SetOriginAndMatrix(origin, matrix);char s1[133], s2[133], s3[133];sprintf(s1, "%f", edges[0]);sprintf(s2, "%f", edges[1]);sprintf(s3, "%f", edges[2]);char* edgesStr[3] = { s1, s2, s3 };tag_t obj = NULL_TAG;UF_MODL_create_block1(UF_NULLSIGN, input_acs_min_corner, edgesStr, &obj);UF_MODL_ask_feat_body(obj, &obj);UF_CSYS_set_wcs(OriWcs);return obj;
}bool CreateSolidBodyMinBoxBlock(std::vector<tag_t> solidBodies)
{if (solidBodies.empty()){return false;}tag_t originWcs = GetWCS();double orginOrigin[3] = { 0 };double originMatrix[9] = { 0 };AskCsysInfo(originWcs, orginOrigin, originMatrix);std::vector<Matrix3x3> solidBodyCalculatedMats;double min_volume = 0;double origin[3] = { 0 };double matrix[9] = { 0 };double min_corner[3] = { 0 };double max_corner[3] = { 0 };double distances[3] = { 0 };tag_t csys = originWcs;int standFaceEdgesCount = 3;AskCsysInfo(csys, origin, matrix);Matrix3x3 mat = TransArrayToMat(matrix);solidBodyCalculatedMats.push_back(mat);//body init boxAskBoundingBox(origin,matrix, solidBodies, min_corner, max_corner, distances);min_volume = GetMinVolume(distances);double minEdgeLen = 0;double maxEdgeLen = 0;GetMaxMinEdge(distances, maxEdgeLen, minEdgeLen);double disTol = minEdgeLen / 120;//warp geometrytag_t auxBody = NULL_TAG;if (!CreateWrapGeometry(solidBodies, disTol, auxBody)){return false;}std::vector<tag_t> faces = GetBodyFaces(auxBody);for (int i = 0; i < faces.size(); ++i){std::vector<tag_t> edges = GetFaceEdges(faces[i]);if (edges.size() < standFaceEdgesCount){continue;}double faceNormal[3] = { 0 };GetFaceNormal(faces[i], faceNormal);for (int j = 0; j < edges.size(); ++j){double tmpMtx[9] = { 0 };if (GetLinearEdgeMtx(edges[j], faceNormal, tmpMtx)){Matrix3x3 tmpLinearEdgeMat = TransArrayToMat(tmpMtx);if (!IsMatVecHasMatInParallelOrPerpendicularStyle(solidBodyCalculatedMats, tmpLinearEdgeMat)){AskBoundingBox(origin, tmpMtx, solidBodies, min_corner, max_corner, distances);double tmpVolume = GetMinVolume(distances);if (!IsZero(tmpVolume) && tmpVolume < min_volume){min_volume = tmpVolume;solidBodyCalculatedMats.push_back(tmpLinearEdgeMat);}}}}}//create blockMatrix3x3 minBoxMat = solidBodyCalculatedMats.back();double minBoxMatArray[9] = { 0 };TransMatToArray(minBoxMat, minBoxMatArray);AskBoundingBox(origin, minBoxMatArray, solidBodies, min_corner, max_corner, distances);tag_t block = CreateBlock(origin, minBoxMatArray,min_corner, distances); //坐标点不需要转换，就是用绝对坐标系if (auxBody != NULL_TAG){UF_OBJ_delete_object(auxBody);}return true;
}void MinBoxTest()
{std::vector<tag_t> selectedBodies = GetSelectedBodies();CreateSolidBodyMinBoxBlock(selectedBodies);
}

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