Development of Fashion CAD Systemfashiontech.snu.ac.kr/note/fashioncad/12-Custom Classes.pdf · 2019-02-12 · SungminKim SEOUL NATIONAL UNIVERSITY Development of Fashion CAD System

Sungmin Kim

SEOUL NATIONAL UNIVERSITY

Development of Fashion CAD System

12. Custom Classes

Introduction Topics Using Custom Classes

Spline Curve 사용하기

– TBSpline Class

DXF (Drawing Exchange Format) 로 저장하기

– TDXFWriter Class

Equation Solver 사용하기

– TEquationSolver Class

» 인체 치수를 이용한 패턴 디자인에의 응용

2

Spline Curve TBSpline Class 의 활용 Spline Curve

Bezier 보다 계산이 복잡하나 각각의 조정점이 전체 형상에 영향을 적게 미침

지정한 점을 지나도록 interpolate 할 수 있음

– Poly Bezier Curve 로 그리기도 구현 가능

3

Spline Curve TBSpline Class 의 활용 Project 에 필요한 파일을 추가

CustomClass.lib

ptLine Class 정의 수정

4

...#include "TBSpline.h"

class ptLine{public :

...

TBSpline *Spline;void FormSpline(ptPoint**);

...};#endif

ptLine::ptLine(int p1,int p2){...

Spline=0;}

ptLine::ptLine(int p1,int p2,int p3,int p4){...

Spline=0;}

ptLine::ptLine(ptLine &L){...Spline=0;}

ptLine::~ptLine(){if (Spline) delete Spline;Spline=0;}

Spline Curve TBSpline Class 의 활용 FormSpline 함수의 구성

Spline 에 사용될 점의 갯수를 지정

– SetPointNum 함수

각 점의 좌표를 입력

– SetPoint 함수

Interpolate 함수로 Spline 을 구성

– Interpolate 함수

5

void ptLine::FormSpline(ptPoint **P){Spline=new TBSpline;Spline->SetPointNum(4);int i;for(i=0;i<4;i++){

Spline->SetPoint(i,P[Point[i]]->x,P[Point[i]]->y);}

Spline->Interpolate();}

Spline Curve TBSpline Class 의 활용 ptGarment Class 수정

AddLine 함수에 Spline 을 구성하는 코드를 추가

6

void ptGarment::AddLine(int p1,int p2,int p3,int p4){Line=(ptLine**)realloc(Line,sizeof(ptLine*)*(LineNum+1));Line[LineNum]=new ptLine(p1,p2,p3,p4);Line[LineNum]->FormSpline(Point);LineNum++;}

Spline Curve TBSpline Class 의 활용 ptGarment Class 수정

ptLine 클래스의 Draw 함수 수정

7

CV->PolyBezier(pt,3);

...if (Spline){

Spline->Draw(C,NC);}

...

DXF Writer DXF 파일로 저장하기 DXF (Drawing Exchange Format)

AutoCAD의 개발사인 AutoDesk에서 만든 규격

서로 다른 CAD 시스템 간 데이터 교환에 널리 이용됨

의복 전용 AAMA-DXF 표준 규격도 존재 (American Apparel Manufacturers Association)

8

DXF Writer TDXFWriter Class의 활용 YUKA CAD 와 호환 가능한 구조

한 패턴이 하나의 Block 을 구성

한 패턴은 하나의 재단선으로 구성됨

– 직선-Spline 모두를 엮어서 하나의 polyline 으로 변환하기

– Spline 을 Polyline 으로 바꾸는 것이 문제

» TBSpline 클래스 활용

9

DXF Writer TDXFWriter Class의 활용 TMainForm 에 메뉴 추가

SaveDialog를 복사/붙이기 하여 SaveDXF dialog box 를 생성

– Filter, Title 등을 수정

프로젝트에는 TDXFWriter.cpp 유닛을 추가

10

DXF Writer TDXFWriter Class의 활용 Menu Handler 작성

11

void __fastcall TMainForm::SaveasDXF1Click(TObject *Sender){TChildForm *C=(TChildForm*)ActiveMDIChild;if (C){

SaveDXF->FileName="";if (SaveDXF->Execute()){

C->Garment->SaveAsDXF(SaveDXF->FileName);}

}}

DXF Writer TDXFWriter Class의 활용 조건 설정

패턴이 없으면 안됨

패턴은 반드시 한개의 외곽선 (Line)을 가져야 함

12

void ptGarment::SaveAsDXF(AnsiString N){if (!PatternNum){

MessageBox(Handle,"No pattern has been defined","Caution",MB_ICONEXCLAMATION|MB_OK);return;}

int i;for(i=0;i<PatternNum;i++){

if (!Pattern[i]->Line->Count){MessageBox(Handle,"Some patterns don't have a cut line","Caution",MB_ICONEXCLAMATION|MB_OK);return;}

}}

DXF Writer TDXFWriter Class의 활용 Section 구조

Pattern section

– 하나의 block 이 하나의 패턴 geometry 를 정의

Information section

– 각각의 패턴을 등록

13

void ptGarment::SaveAsDXF(AnsiString N){...

TDXFWriter *D=new TDXFWriter;D->OpenFile(N);D->OpenPatternSection();for(i=0;i<PatternNum;i++){

D->BeginPattern(Pattern[i]->Name);SaveAsPolyline(D,Pattern[i]);D->EndPattern();}

D->EndPatternSection();D->OpenInfoSection();for(i=0;i<PatternNum;i++){

D->InsertPattern(Pattern[i]->Name);}

D->EndInfoSection();D->CloseFile();delete D;}

Pattern

Pattern

...

Pattern Name

Pattern Name

...

PatternSection

InfoSection

DXF Writer TDXFWriter Class의 활용 SaveAsPolyline 함수의 작성

14

void ptGarment::SaveAsPolyline(TDXFWriter *D,ptPattern *P){int i,j;int num=0;ptIntegerList *I=P->Line;for(i=0;i<I->Count;i++){

ptLine *L=Line[I->Number[i]];if (L->PointNum==2){ // straight line

num+=1;}

else{L->Spline->GetUniformPointLength(10.0f);num+=L->Spline->UniformPointNum;}

}float *x=new float[num+100];float *y=new float[num+100];num=0;for(i=0;i<I->Count;i++){

ptLine *L=Line[I->Number[i]];if (L->PointNum==2){

x[num]=Point[L->Point[0]]->x;y[num]=Point[L->Point[0]]->y;num++;}

else{

L->Spline->GetUniformPointLength(10.0f);int n=L->Spline->UniformPointNum;for(j=0;j<n-1;j++){

TPoint2D p=L->Spline->UniformPoint[j].As2D();x[num]=p.x;y[num]=p.y;num++;}

}}

x[num]=x[0];y[num]=y[0];num++;D->WritePolyline(num,x,y);delete []x;delete []y;}

DXF Writer TDXFWriter Class의 활용

15

DXF Writer TDXFWriter Class의 활용 https://a360.autodesk.com/viewer

16

Equation Solver Equation Solver 의 활용 TEquationSolver 유닛을 프로젝트에 추가

변수 이름, 값을 입력

– a=100

– b=200

변수를 포함한 수식의 값을 계산

– a+b*3

– c+a/2

인체 치수를 이용한 패턴 제도에 활용

– 인체 치수를 입력 받아서 변수에 할당

– 점을 정의할 때 단순한 숫자가 아니라 변수를 이용한 수식으로 정의

– 변수 값을 바꾸면 패턴이 변경되도록

17

+

Equation Solver Equation Solver 의 활용 TEquationSolver

핵심은 Reverse Polish Notation (RPN, 역폴란드법) 을 이용한 식의 계산

18

5 + ((1 + 2) × 4) − 3 5 1 2 + 4 × + 3 −

5

1

2

StackFILO (First in Last Out)

Equation Solver Equation Solver 의 활용 변수 관리 UI 작성

TChildForm에 메뉴 추가

TVariableDialog.cpp Form 추가

19

TStringGrid

DefaultColWidth=150DefaultRowHeight=20FixedCols=1FixedRows=0Name=LISTOptions:goEditing=trueRowCount=1ScrollBars=ssVertical

NAME VALUE

Equation Solver Equation Solver 의 활용 변수 관리 UI 작성

ptGarment Class 에 변수 관리 기능 추가

20

...#include "TEquationSolver.h"

class ptGarment{public :

...

int ObjectType;int ViewPoint,ViewHull;

TEquationSolver *Solver;

...

ptGarment::ptGarment(){...

Solver=new TEquationSolver;}

ptGarment::~ptGarment(){...

delete Solver; Clear 할 때도 변수는 지우지 않음Solver=0;Clear();}

Equation Solver Equation Solver 의 활용 Edit-Variables Event Handler 작성

21

TVariableDialog *V=VariableDialog;TEquationSolver *S=Garment->Solver;

V->LIST->RowCount=S->VariableNum;V->LIST->Cells[0][0]="";V->LIST->Cells[1][0]="";int i;for(i=0;i<S->VariableNum;i++){

V->LIST->Cells[0][i]=AnsiString(S->Variable[i].Name);V->LIST->Cells[1][i]=AnsiString(S->Variable[i].Value);}

V->ShowModal();if (V->Result){

S->ClearVariable();for(i=0;i<V->LIST->RowCount;i++){

if (V->LIST->Cells[0][i]!=""){S->AddVariable(V->LIST->Cells[0][i],V->LIST->Cells[1][i].ToDouble());}

}Garment->Regenerate();FormPaint(this);}

Equation Solver Equation Solver 의 활용 Variable Dialog 의 Event Handler

Add / Delete

22

void __fastcall TVariableDialog::Button1Click(TObject *Sender){if (NAME->Text!="" && VALUE->Text!=""){

int i;for(i=0;i<LIST->RowCount;i++){

if (LIST->Cells[0][i]==NAME->Text) return;}

if (LIST->Cells[0][0]!="") LIST->RowCount++;LIST->Cells[0][LIST->RowCount-1]=NAME->Text;LIST->Cells[1][LIST->RowCount-1]=VALUE->Text;}

}

void __fastcall TVariableDialog::Button2Click(TObject *Sender){int r=LIST->Row;if (r!=-1 && LIST->Cells[0][r]!=""){

int i;for(i=r;i<LIST->RowCount-1;i++){

LIST->Cells[0][i]=LIST->Cells[0][i+1];LIST->Cells[1][i]=LIST->Cells[1][i+1];}

if (LIST->RowCount==1){LIST->Cells[0][0]="";LIST->Cells[1][0]="";}

else LIST->RowCount--;}

}

Equation Solver Equation Solver 의 활용 Variable Dialog 의 Event Handler

Ok / Cancel

23

void __fastcall TVariableDialog::Button3Click(TObject *Sender){Result=1;Close();}

void __fastcall TVariableDialog::Button4Click(TObject *Sender){Result=0;Close();}

Equation Solver Equation Solver 의 활용 ptGarment Class 에서 변수를 저장하도록 수정

24

void ptGarment::SaveToFileBinary(AnsiString N){TNewFileStream *F=new TNewFileStream(N,fmCreate);F->WriteInt(1); // Version,20160624F->WriteInt(StepNum);int i;for(i=0;i<StepNum;i++){

Step[i]->SaveToFileBinary(F);}

F->WriteInt(Solver->VariableNum);for(i=0;i<Solver->VariableNum;i++){

F->WriteString(Solver->Variable[i].Name);F->WriteFloat(Solver->Variable[i].Value);}

delete F;}

void ptGarment::LoadFromFileBinary(AnsiString N){TNewFileStream *F=new TNewFileStream(N,fmOpenRead);int Version=F->ReadInt();StepNum=F->ReadInt();Step=(ptDesignStep**)calloc(StepNum,sizeof(ptDesignStep*));int i;for(i=0;i<StepNum;i++){

Step[i]=new ptDesignStep;Step[i]->LoadFromFileBinary(F);}

int n=F->ReadInt();for(i=0;i<n;i++){

AnsiString S=F->ReadString();float f=F->ReadFloat();Solver->AddVariable(S,f);}

delete F;Regenerate();}

Equation Solver Equation Solver 의 활용 점의 정의에 변수를 활용하기

좌표 대신 식을 입력하게 하기

– 입력창 및 코드 수정

25

void __fastcall TChildForm::AddXY1Click(TObject *Sender){...Garment->AddPoint(PointXYDialog->X->Text,PointXYDialog->Y->Text);...}

void __fastcall TChildForm::MovePoint1Click(TObject *Sender){...Garment->AddPointMove(PointXYDialog->X->Text,PointXYDialog->Y->Text);...}

void __fastcall TChildForm::AddDividePoint1Click(TObject *Sender){...Garment->AddPointDivide(DividePointDialog->M->Text,DividePointDialog->N->Text);...}

Equation Solver Equation Solver 의 활용 ptDesignStep 의 수정

x, y 값을 float 값이 아닌 AnsiString 으로 받을 수 있도록 변수를 추가

26

ptDesignStep.h

AnsiString XEqn,YEqn;

void SetXEquation(AnsiString S) {XEqn=S;}void SetYEquation(AnsiString S) {YEqn=S;}AnsiString GetXEquation() {return XEqn;}AnsiString GetYEquation() {return YEqn;}

ptDesignStep::ptDesignStep(){...XEqn=YEqn="";}

void ptDesignStep::SaveToFileBinary(TNewFileStream *F){...F->WriteString(XEqn);F->WriteString(YEqn);}

void ptDesignStep::LoadFromFileBinary(TNewFileStream *F){...XEqn=F->ReadString();YEqn=F->ReadString();}

Equation Solver Equation Solver 의 활용 ptGarment 클래스의 수정

27

void ptGarment::AddPoint(AnsiString X,AnsiString Y){ptDesignStep *S=AddStep(stAddPointXY);S->SetXEquation(X);S->SetYEquation(Y);float x,y;Solver->Evaluate(X,x);Solver->Evaluate(Y,y);AddPoint(x,y,StepNum-1);}

void ptGarment::AddPointMove(AnsiString X,AnsiString Y){int i;for(i=0;i<SelNum;i++){

if (Sel[i]->Type==0){ptDesignStep *S=AddStep(stAddPointMove);S->AddIntParam(Sel[i]->Num);S->SetXEquation(X);S->SetYEquation(Y);float x,y;Solver->Evaluate(X,x);Solver->Evaluate(Y,y);AddPoint(Point[Sel[i]->Num]->x+x,Point[Sel[i]->Num]->y+y,StepNum-1);}

}}


28

void ptGarment::AddPointDivide(AnsiString M,AnsiString N){ptDesignStep *S=AddStep(stAddPointDiv);S->AddIntParam(Sel[0]->Num);S->AddIntParam(Sel[1]->Num);S->SetXEquation(M);S->SetYEquation(N);float x,y,m,n;Solver->Evaluate(M,m);Solver->Evaluate(N,n);x=(m*Point[Sel[1]->Num]->x+n*Point[Sel[0]->Num]->x)/(m+n);y=(m*Point[Sel[1]->Num]->y+n*Point[Sel[0]->Num]->y)/(m+n);AddPoint(x,y,StepNum-1);}


Regenerate 함수의 수정

29

...switch(S->Type){

case stAddPointXY:Solver->Evaluate(S->GetXEquation(),x);Solver->Evaluate(S->GetYEquation(),y);AddPoint(x,y,i);break;

case stAddPointMove:Solver->Evaluate(S->GetXEquation(),x);Solver->Evaluate(S->GetYEquation(),y);AddPoint(Point[S->GetIntParam(0)]->x+x,Point[S->GetIntParam(0)]->y+y,i);break;

case stAddPointDiv:Solver->Evaluate(S->GetXEquation(),m);Solver->Evaluate(S->GetYEquation(),n);x=(m*Point[S->GetIntParam(1)]->x+n*Point[S->GetIntParam(0)]->x)/(m+n);y=(m*Point[S->GetIntParam(1)]->y+n*Point[S->GetIntParam(0)]->y)/(m+n);AddPoint(x,y,i);break;

...

Equation Solver Equation Solver 의 활용 Point-Edit Property Event Handler 수정

30

void __fastcall TChildForm::EditProperty2Click(TObject *Sender){float x,y;if (Garment->OnePoint()){

ptDesignStep *S=Garment->PointStep();switch(S->Type){

case stAddPointXY:PointXYDialog->Caption="Set Coordinate";PointXYDialog->X->Text=S->GetXEquation();PointXYDialog->Y->Text=S->GetYEquation();PointXYDialog->ShowModal();if (PointXYDialog->Result==1){

S->SetXEquation(PointXYDialog->X->Text);S->SetYEquation(PointXYDialog->Y->Text);}

break;case stAddPointMove:PointXYDialog->Caption="Set Displacement";PointXYDialog->X->Text=S->GetXEquation();PointXYDialog->Y->Text=S->GetYEquation();PointXYDialog->ShowModal();if (PointXYDialog->Result==1){

S->SetXEquation(PointXYDialog->X->Text);S->SetYEquation(PointXYDialog->Y->Text);}

break;

case stAddPointDiv:DividePointDialog->M->Text=S->GetXEquation();DividePointDialog->N->Text=S->GetYEquation();DividePointDialog->ShowModal();if (DividePointDialog->Result){

S->SetXEquation(DividePointDialog->M->Text);S->SetYEquation(DividePointDialog->N->Text);}

break;}

Garment->Regenerate();FormPaint(this);}

}

Documents

Development of Fashion CAD Systemfashiontech.snu.ac.kr/note/fashioncad/12-Custom Classes.pdf · 2019-02-12 · SungminKim SEOUL NATIONAL UNIVERSITY Development of Fashion CAD System