I want to draw geometric diagram like straight line,triangle,circle etc using C language.I want some help for coding n algo....:)
kiranroy
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dkalita
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kiranroy
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THankssss.........:-)
kiranroy
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#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>
#include<dos.h>
# define GRIDSIZE 2
//*****************************DECLARATIONS****************************//
int a[42][36];
int b[42][36];
char c[100];
int t=0;
void save_numbrl(int ,int );//save numbrl value
void sympoint(int,int,int,int,int);
void Ngdpt(int,int,int); //nearest grid point search function.
int nb[22][13];//strore code for each cell.
int mini(int ,int );//return min between two integer.
void midpoint_circle(int,int,int);
void put_pixel(int x,int y)
{
setcolor(YELLOW);
circle(x,y,2);
putpixel(x,y,YELLOW);
putpixel(x-1,y,YELLOW);
putpixel(x+1,y,YELLOW);
putpixel(x,y+1,YELLOW);
putpixel(x,y-1,YELLOW);
putpixel(x-1,y-1,YELLOW);
putpixel(x+1,y+1,YELLOW);
putpixel(x-1,y+1,YELLOW);
putpixel(x+1,y-1,YELLOW);
}
//****************************PLOT_GRIDS**********************************//
void print_braille_grid()//print simulated grid point funtion
{
int i,j,x,y,m=0,n=0;
for(i=1;i<630;i+=15)
{ y=0;
while(y<2)
{
for(j=1;j<470;j+=18)
{
x=0;
while(x<3)
{
putpixel(i,j,15);
a[n][m]=i;
b[n][m]=j;
x++;j+=8;m++;
if(m>35)
m%=36;
}
}
y++;i+=8 ;n++;
if(n>41)
n%=42;
}
}
}
//*************INITIALISE_CELLS_NUMBRL_VALUE_TO_ZERO*******************//
void zero()
{int i,j;
for(i=1;i<22;i++)
{
for(j=1;j<13;j++)
{nb[i][j]=0;
}
}
}
//********************* MIDPOINT_LINE_ALGO**********************************//
int midpoint(int x1,int x2) //return middle point
{
return ((x1+x2)/2);
}
int distance(int x1,int y1,int x2,int y2)//return distance between two points
{ int dist;
dist=sqrt(pow((x1-x2),2)+pow((y1-y2),2));
return dist;
}
void draw_line(int x1,int y1,int x2,int y2)//draw the line whose end point are given
{
int m1,m2,g1,g2,i,j,z=5;//*********
m1=midpoint(x1,x2);
m2=midpoint(y1,y2);
putpixel(m1,m2,14);
putpixel(x1,y1,14);
putpixel(x2,y2,14);
//putpixel(x1,y1,z);
t++;
if(t%5==0)//*********
{
Ngdpt(x1,y1,z);
Ngdpt(x2,y2,z);
Ngdpt(m1,m2,z);
}
if(distance(m1,m2,x1,y1)>4)
{
draw_line(x1,y1,m1,m2);
draw_line(m1,m2,x2,y2);
}
}
//**************************MIDPOINT_CIRCLE*********************************//
void midpoint_circle(int xc,int yc,int r) //mid point algo
{
int p,x,y,l=0;
x=0;
y=r;
sympoint(x,y,xc,yc,l);
p=1-r;
do
{if(p<0)
x=x+1;
else
{x+=1;
y-=1;
}
if(p<0)
p=p+2*x+1;
else
p=p+2*(x-y)+1;
l++;
sympoint(x,y,xc,yc,l);
}while(x<y);
}
void sympoint(int x,int y,int xc,int yc,int l)
{
int z=6;//**********
putpixel(xc+x,yc+y,14);
putpixel(xc-x,yc+y,14);
putpixel(xc+x,yc-y,14);
putpixel(xc-x,yc-y,14);
putpixel(xc+y,yc+x,14);
putpixel(xc-y,yc+x,14);
putpixel(xc+y,yc-x,14);
putpixel(xc-y,yc-x,14);
if(l%5==0)//*********
{
Ngdpt(xc+x,yc+y,z);
Ngdpt(xc-x,yc+y,z);
Ngdpt(xc+x,yc-y,z);
Ngdpt(xc-x,yc-y,z);
Ngdpt(xc+y,yc+x,z);
Ngdpt(xc-y,yc+x,z);
Ngdpt(xc+y,yc-x,z);
Ngdpt(xc-y,yc-x,z);
}
}
//*********NEAREST_GRID_POINT_CALCULATION_FUNCTIONS**********************//
void Ngdpt(int x,int y,int z)//nearest grid point search.
{
int i,j,p1=2000,p2=2000,m=0;
int d,g=1000;
for(i=x-z;i<=x+z;i+=1)
{
for(j=y-z;j<=y+z;j+=1)
{
if(getpixel(i,j)==15)
{
d=distance(x,y,i,j);
m=mini(g,d);
if(m==1)
{
g=d;
p1=i;
p2=j;
}
}
}
}
if(z==13)
{
setcolor(14);
//circle(p1,p2,1);
//circle(p1,p2,2);
//circle(p1,p2,3);
//circle(p1,p2,4);
circle(p1,p2,5);
}
else
{save_numbrl(p1,p2);//save numbrl to array nb.
put_pixel(p1,p2);
}
}
int mini(int d,int k)//return minumum value
{
if(d>k)
return 1;
else
return 0;
}
//******NUMBRL_CALCULATION_&_SAVING_STORING_SHOWING_FUNCTIONS************//
int cellx(int c) //return cell value of x direction;
{int i,j=0,d;
for(i=0;i<42;i++)
{
for(j=0;j<36;j++)
{
if(c==a[i][j])
{
d=i/2;
}
}
}return (d+1);
}
int celly(int c)//return cell value of y direction;
{int i,j,d;
for(i=0;i<42;i++)
{
for(j=0;j<36;j++)
{
if(c==b[i][j])
{
d=j/3;
}
}
}return (d+1);
}
int search(int x,int y)//search for each cell position numbrl values;
{ int i,j,p;
for(i=0;i<42;i++)
{
for(j=0;j<36;j++)
{
if(x==a[i][j] && y==b[i][j])
if(i%2==0)
{if(j%3==0)
p=10;
else if(j%3==1)
p=20;
else
p=40;}
else
{ if(j%3==0)
p=1;
else if(j%3==1)
p=2;
else
p=4;
}
}
}
return p;
}
void save_numbrl(int x,int y)//save each cell's numbrl values to nb array.
{
nb[cellx(x)][celly(y)]+=search(x,y);
}
void show_numbrl()//show numbrl value for each cell
{
int i,j,k;
FILE *f;
f=fopen("c:/project/Braille.txt","w"); //file open
fprintf(f,"----------------------------------------------------------------------------------------------------------\n");
fprintf(f,"\t\t<<<< %s >>>>",c);
for(j=1;j<12;j++)
{ k=1;
for(i=1;i<22;i++)
{
if(nb[i][j]!=0)
{ if(k==1)
fprintf(f,"Row(%d) ::",j);
k++;
fprintf(f,"\t(%d,%d,%d),",i,j,nb[i][j]);//save in the file
}
}
fprintf(f,"\n");
}
fclose(f); //close the file
}
//**************************MAIN_FUNC******************************//
int main()
{
float x[10],y[10];
int n,m,k,i,l;
/* request auto detection */
int gdriver = DETECT, gmode;
/* initialize graphics mode */
initgraph(&gdriver, &gmode, "c:\\tc\\bgi" );
zero();// function to initialise the numbrl array nb[8][8];
printf(" Enter 1 for line\n\t 2 for circle \n\t 3 triangle \n\t 4 parallelogram \n\t 5 for regular polygon::");
scanf("%d",&n);
cleardevice();
print_braille_grid();
switch(n)
{
case 1:
strcpy(c,"LINE");
Ngdpt(250,250,13);
draw_line(100,100,400,400);
outtextxy(100,100," A");
outtextxy(400,400," B");
break;
case 2:
strcpy(c,"CIRCLE");
Ngdpt(300,200,13);
midpoint_circle(300,200,100);
outtextxy(300,200,"C");
break;
case 3:
strcpy(c,"TRIANGLE");
Ngdpt(midpoint(100,300),midpoint(100,300),13);
Ngdpt(midpoint(100,300),midpoint(300,300),13);
Ngdpt(midpoint(100,100),midpoint(300,100),13);
draw_line(100,100,300,300);
draw_line(100,300,300,300);
draw_line(100,300,100,100);
outtextxy(100,300," A");
outtextxy(100,100," B");
outtextxy(300,300,"C");
break;
case 4:
strcpy(c,"PARALLEOGRAM");
// Ngdpt(midpoint(200,100),midpoint(100,200),13);
//Ngdpt(midpoint(100,300),midpoint(200,200),13);
//Ngdpt(midpoint(400,300),midpoint(100,200),13);
Ngdpt(midpoint(100,300),midpoint(100,100),13);
draw_line(50,200,100,100); //AB
draw_line(100,100,300,100); //BC
draw_line(300,100,250,200); //CD
draw_line(250,200,50,200); //DA
/* outtextxy(100,200,"A");
outtextxy(200,100,"B");
outtextxy(400,100,"C");
outtextxy(300,200,"D"); */
break; //for parallelogram
case 5:
strcpy(c,"POLYGON");
Ngdpt(midpoint(200,120),midpoint(100,200),13);
Ngdpt(midpoint(120,120),midpoint(200,300),13);
Ngdpt(midpoint(120,200),midpoint(300,400),13);
Ngdpt(midpoint(200,280),midpoint(400,300),13);
Ngdpt(midpoint(280,280),midpoint(300,200),13);
Ngdpt(midpoint(280,200),midpoint(200,100),13);
draw_line(200,100,120,200);
draw_line(120,200,120,300);
draw_line(120,300,200,400);
draw_line(200,400,280,300);
draw_line(280,300,280,200);
draw_line(280,200,200,100);break;
default:break;
}
show_numbrl();//this will show u the cell no. with cell position values;
getch();
closegraph();
return 0;
}We implement this code to draw diagram in selecting grid as in braille system.now we want to minimize to select the points and to make better of these diagram.....
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