# include <iostream.h> # include <graphics.h> # include <conio.h> # include <math.h> void show_screen( ); void C_curve(long double,long double,long double,long double,int); void Line(const int,const int,const int,const int); int main( ) { int driver=VGA; int mode=VGAHI; long double x=0; long double y=0; long double l=0; long double angle=0; int n=0; do { show_screen( ); gotoxy(8,10); cout<<\"Starting Point of the Line : (x,y) :\"; gotoxy(8,11); cout<<\"ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ\"; gotoxy(12,13); cout<<\"Enter the value of x = \"; cin>>x; gotoxy(12,14); cout<<\"Enter the value of y = \"; cin>>y; gotoxy(8,18); cout<<\"Length of the Line : l : \"; cin>>l; gotoxy(8,20); cout<<\"Angle of the Line with x-axis : \"; cin>>angle; angle*=(M_PI/180); gotoxy(8,22); cout<<\"Enter the Order of C-Curve = n = \"; cin>>n; initgraph(&driver,&mode,\"..\\\\Bgi\"); setcolor(15); C_curve(x,y,l,angle,n); setcolor(15); outtextxy(110,460,\"Press <Enter> to continue or any other key to exit.\"); int key=int(getch( )); if(key!=13) break; } while(1); return 0; } //------------------------------ C_curve( ) ---------------------------// void C_curve(long double x,long double y,long double length, long double angle,int n_order) { if(n_order>0) { length/=M_SQRT2; C_curve(x,y,length,(angle+M_PI_4),(n_order-1)); x+=(length*cosl(angle+M_PI_4)); y+=(length*sinl(angle+M_PI_4)); C_curve(x,y,length,(angle-M_PI_4),(n_order-1)); } else { setcolor(getcolor( )); Line((int)(x+0.5),(int)(y+0.5), (int)(x+length*cosl(angle)+0.5), (int)(y+length*sinl(angle)+0.5)); } } //------------------------------- Line( ) -----------------------------// void Line(const int x_1,const int y_1,const int x_2,const int y_2) { int color=getcolor( ); int x1=x_1; int y1=y_1; int x2=x_2; int y2=y_2; if(x_1>x_2) { x1=x_2; y1=y_2; x2=x_1; y2=y_1; } int dx=abs(x2-x1); int dy=abs(y2-y1); int inc_dec=((y2>=y1)?1:-1); if(dx>dy) { int two_dy=(2*dy); int two_dy_dx=(2*(dy-dx)); int p=((2*dy)-dx); int x=x1; int y=y1; putpixel(x,y,color); while(x<x2) { x++; if(p<0) p+=two_dy; else { y+=inc_dec; p+=two_dy_dx; } putpixel(x,y,color); } } else { int two_dx=(2*dx); int two_dx_dy=(2*(dx-dy)); int p=((2*dx)-dy); int x=x1; int y=y1; putpixel(x,y,color); while(y!=y2) { y+=inc_dec; if(p<0) p+=two_dx; else { x++; p+=two_dx_dy; } putpixel(x,y,color); } } } //-------------------------- show_screen( ) ---------------------------// void show_screen( ) { restorecrtmode( ); textmode(C4350); cprintf(\"\\n********************************************************************************\"); cprintf(\"*********************************- -**********************************\"); cprintf(\"*--------------------------------- \"); textbackground(1); cprintf(\" C-Curve \"); textbackground(8); cprintf(\" ----------------------------------*\"); cprintf(\"*********************************- -**********************************\"); cprintf(\"*-****************************************************************************-*\"); for(int count=0;count<42;count++) cprintf(\"*-* *-*\"); gotoxy(1,46); cprintf(\"*-****************************************************************************-*\"); cprintf(\"*------------------------------------------------------------------------------*\"); cprintf(\"********************************************************************************\"); gotoxy(1,2); }