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Circle.cpp
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#include<stdio.h>
#include<graphics.h>
#include<conio.h>
#include<math.h>
#include<dos.h>
int n=0;
int *pixels=NULL;
void Export2Pixels(int *pixels, int n)
{
FILE *fp = fopen("Pixels_mpcircle.txt", "w");
fprintf(fp,"centre= %d ,%d\n",pixels[0], pixels[1]);
fprintf(fp,"radius= %d\n\n",pixels[3]-pixels[2]);
fprintf(fp, " x, y\n");
for(int i=0; i<n; i++)
{
fprintf(fp, "%d, %d\n", pixels[2*i+0], pixels[2*i+1]);
}
fclose(fp);
printf("Pixel coordinates exported to Pixels.txt successfully!\n");
}
void ExportSVG(int *pixels, int n, int width, int height)
{
int scale = 10;
int margin = 100;
int i;
int x1 = pixels[0], x2 = pixels[0];
int y1 = pixels[1], y2 = pixels[1];
for(i=1; i<n; i++){
if(x1>pixels[2*i+0]) x1=pixels[2*i+0];
if(x2<pixels[2*i+0]) x2=pixels[2*i+0];
if(y1>pixels[2*i+1]) y1=pixels[2*i+1];
if(y2<pixels[2*i+1]) y2=pixels[2*i+1];
}
x1 *=scale; x2 *=scale;
y1 *=scale; y2 *=scale;
FILE *fp = fopen("Circle.svg", "w");
fprintf(fp, "<svg width=\"%d\" height=\"%d\" viewBox=\"0 0 %d %d\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\">",
width,height,width,height);
for(i=0; i<n; i++)
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:blue;stroke:red;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-x1+100, scale*pixels[2*i+1]-y1+100, scale, scale);
}
fprintf(fp, "\n </svg>\n");
fclose(fp);
printf("SVG created successfully!\n");
}
void ExportHTML(int *pixels, int n, int width, int height)
{
int scale = 10;
int margin = 100;
int i;
int x1 = pixels[0], x2 = pixels[0];
int y1 = pixels[1], y2 = pixels[1];
for(i=1; i<n; i++){
if(x1>pixels[2*i+0]) x1=pixels[2*i+0];
if(x2<pixels[2*i+0]) x2=pixels[2*i+0];
if(y1>pixels[2*i+1]) y1=pixels[2*i+1];
if(y2<pixels[2*i+1]) y2=pixels[2*i+1];
}
x1 *=scale; x2 *=scale;
y1 *=scale; y2 *=scale;
FILE *fp = fopen("Circle.html", "w");
fprintf(fp, "<!DOCTYPE html>\n<html>\n<body>\n");
fprintf(fp, "<svg width=\"%d\" height=\"%d\" viewBox=\"0 0 %d %d\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\">",
width,height,width,height);
for(i=0; i<n; i++)
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:blue;stroke:red;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-x1+100, scale*pixels[2*i+1]-y1+100, scale, scale);
}
fprintf(fp, "\n </svg>\n");
fprintf(fp, "\n</body>\n</html>\n");
fclose(fp);
printf("HTML created successfully!\n");
}
int *midPointCircleDraw(int x_c, int y_c, int r,int *n)
{
int x,y,p;
x=0;y=r;
p=1.25-r;
int *pixels = (int*)malloc(8*(x_c+1)*sizeof(int));
int m=0;
pixels[2*m+0]=x_c;
pixels[2*m+1]=y_c;
m++;
pixels[2*m+0]=x+x_c;
pixels[2*m+1]=y+y_c;
m++;
pixels[2*m+0]=x+x_c;
pixels[2*m+1]=-y+y_c;
m++;
pixels[2*m+0]=y+x_c;
pixels[2*m+1]=x+y_c;
m++;
pixels[2*m+0]=-y+x_c;
pixels[2*m+1]=x+y_c;
m++;
while(x<y)
{
if(p<0)
p=p+2*x+1;
else
{
p=p+2*x-2*y+1;
y=y-1;
}
x=x+1;
pixels[2*m+0]=x+x_c;
pixels[2*m+1]=y+y_c;
m++;
pixels[2*m+0]=x+x_c;
pixels[2*m+1]=-y+y_c;
m++;
pixels[2*m+0]=-x+x_c;
pixels[2*m+1]=y+y_c;
m++;
pixels[2*m+0]=-x+x_c;
pixels[2*m+1]=-y+y_c;
m++;
pixels[2*m+0]=y+x_c;
pixels[2*m+1]=x+y_c;
m++;
pixels[2*m+0]=y+x_c;
pixels[2*m+1]=-x+y_c;
m++;
pixels[2*m+0]=-y+x_c;
pixels[2*m+1]=x+y_c;
m++;
pixels[2*m+0]=-y+x_c;
pixels[2*m+1]=-x+y_c;
m++;
}
*n=m;
printf("\nNumber of pixels = %d\n", *n);
return pixels;
}
void display()
{
for(int i=0;i<n;i++)
{
putpixel(pixels[2*i+0],pixels[2*i+1],7);
}
printf("Waiting for you to close the display-window...\n");
}
int main()
{
int gd=DETECT,gm,r,x_c,y_c;
printf("\nEnter the co-ordinate of Centre of Circle::");
scanf("%d%d",&x_c,&y_c);
printf("\nEnter the radius of the circle::");
scanf("%d",&r);
initgraph(&gd,&gm,NULL);
// To draw a circle of radius r centred at (x_c, y_c) with radius r
pixels=midPointCircleDraw(x_c,y_c,r,&n);
int width=5000;
int height=5000;
ExportSVG(pixels, n, width, height);
ExportHTML(pixels, n, width, height);
Export2Pixels(pixels, n);
display();
while (!kbhit( ))
{
delay(200);
}
return 0;
}