【ARX 一步一步开发CAD】04-复制、移动、镜像函数

colinzhoucn

AcGeMatrix3d有几种方法：

移动

Acad::ErrorStatus Move(AcDbObjectId entId, const AcGePoint3d ptFrom, const AcGePoint3d ptTo)
5 M' N# T4 b9 A( @' a7 g1 \{
// 构建用于实现移动实体的矩阵
AcGeVector3d vec(ptTo[X] – ptFrom[X], ptTo[Y] – ptFrom[X], ptTo[Z] – ptFrom[Z]);
AcGeMatrix3d mat;
mat.setToTranslation(vec);
1 }( H; T: X- U1 s7 Q+ S& k6 r6 d) xAcDbEntity *pEnt = NULL;
. N) W7 Z3 a" e( D+ y2 i# S3 {Acad::ErrorStatus es = acdbOpenObject(pEnt, entId,AcDb::kForWrite);
if (es != Acad::eOk)
return es;
es = pEnt->transformBy(mat);
pEnt->close();
return es;
8 ^/ {" O6 {' R: D2 P}

复制

BOOL Copy(AcDbObjectId entId, const AcGePoint3d ptFrom,const AcGePoint3d ptTo)
3 P) i* H# x$ M* N6 z8 e$ l{
AcDbEntity *pEnt = NULL;
if (acdbOpenObject(pEnt, entId , AcDb::kForRead) != Acad::eOk)
; \: [  H# @& }* u7 _return FALSE;
2 [- n# D, h2 x% qAcDbEntity *pCopyEnt = AcDbEntity::cast(pEnt->clone());
AcDbObjectId copyEntId;
. e2 x* j& C; W2 M0 O- e" {5 wif (pCopyEnt)
) m9 ]$ R  D: e$ |8 i- \copyEntId = PostToModelSpace(pCopyEnt);
$ J8 a1 _( b3 C/ t+ d: _/ |3 vMove(copyEntId, ptFrom, ptTo);

return TRUE;
+ t6 I% r  @9 y: o; K; L}

镜像

Acad::ErrorStatus Mirror(AcDbObjectId entId, const AcGePoint3d dp1,const AcGePoint3d dp2)
0 I# {* d& `) R# r{
  [' }4 K* f/ k' }6 g* T" S  Q// 构建用于实现移动实体的矩阵
8 ^/ \( d2 z5 C1 u2 gAcGeMatrix3d mat;AcGeLine3d line;
( j$ E1 J" o4 B& B" tline.set(dp1,dp2);
mat.setToMirroring(line);
AcDbEntity *pEnt = NULL;
) P) C2 Q+ b  h: Y# QAcad::ErrorStatus es = acdbOpenObject(pEnt, entId,AcDb::kForWrite);
3 L1 v/ w# p1 P$ {8 S/ A" \; d3 I7 nif (es != Acad::eOk)
return es;
% n% m$ n' E$ L+ x% W5 G% G+ z2 JAcDbEntity *pCopyEnt = AcDbEntity::cast(pEnt->clone());
# [6 I6 w6 w: G+ q( _AcDbObjectId copyEntId;
8 a# K, f' d! j( ^9 o! D" D5 kif (pCopyEnt)
copyEntId = PostToModelSpace(pCopyEnt);
es = pEnt->transformBy(mat);
" x6 k9 f& ~5 J3 e" i  DpEnt->close();
% S+ U; u7 O* y% n% _return es;
. w# ]6 B' h9 O; x- a( m}
9 U7 a2 O  j, i& Cstatic AcDbObjectId PostToModelSpace(AcDbEntity* pEnt)
/ [  j6 o, h0 q% I8 a0 N8 k{
AcDbBlockTable *pBlockTable;
acdbHostApplicationServices()->workingDatabase() ->getBlockTable(pBlockTable, AcDb::kForRead);
0 m0 g. b7 k& m) P# f* v& v/ `% m+ EAcDbBlockTableRecord *pBlockTableRecord;
7 v( i( r# p8 y' TpBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
AcDbObjectId entId;
2 B  h5 M( ]1 D2 i6 q% r& N! wpBlockTableRecord->appendAcDbEntity(entId, pEnt);
pBlockTable->close();
# t2 D. B( P1 j) l0 r7 k8 zpBlockTableRecord->close();
* e1 v+ C$ d2 A/ Q. M8 ]0 BpEnt->close();
3 _/ l/ g5 O% P0 zreturn entId;

}

, l* b' R# s7 n2 l* J! N; A参考：http://www.colinchou.com/archives/245



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