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assign5.cpp
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assign5.cpp
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/*
Name - Avik Ghosh
ID - 181001001039
Batch - BCS3A
*/
//Triangle drawing using Bresenham line drawing algorithm and also interior colouring using Flood Fill algorithm.
#include<stdio.h>
#include<graphics.h>
#include<conio.h>
int n=0,size;
int x1,y1,x2,y2,x3,y3;
int *pixels=NULL;
static int m=0;
void ExportPixels()
{
FILE *fp = fopen("1039_Pixels.txt", "w");
for(int i=0; i<n; i++)
{
if(i>0)
{
fprintf(fp, "%d, %d\n", pixels[2*i+0], pixels[2*i+1]);
}
else if(i==0)
{
fprintf(fp,"Coordinate A ( %d, %d)\n", x1,y1);
fprintf(fp,"Coordinate B ( %d, %d)\n", x2,y2);
fprintf(fp,"Coordinate C ( %d, %d)\n", x3,y3);
fprintf(fp,"Coordinate of Centroid ( %d, %d)\n", (x1+x2+x3)/3,(y1+y2+y3)/3);
fprintf(fp,"Number of pixels : %d\n",n);
fprintf(fp, "Coordinates(Including A,B and C also) : \nX, Y\n%d, %d\n",x1,y1);
}
}
fclose(fp);
printf("Number of pixels : %d\n",n);
printf("1039_Pixels.txt created successfully!\n");
}
void Export2SVG(int width, int height)
{
int scale = 10;
int margin = 100;
int i;
int a1 = pixels[0], a2 = pixels[0];
int b1 = pixels[1], b2 = pixels[1];
for(i=1; i<n; i++)
{
if(a1>pixels[2*i+0])
{
a1=pixels[2*i+0];
}
if(a2<pixels[2*i+0])
{
a2=pixels[2*i+0];
}
if(b1>pixels[2*i+1])
{
b1=pixels[2*i+1];
}
if(b2<pixels[2*i+1])
{
b2=pixels[2*i+1];
}
}
a1 *=scale; a2 *=scale;
b1 *=scale; b2 *=scale;
FILE *fp = fopen("1039.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++)
{
if(pixels[2*i+0]==x1 && pixels[2*i+1]==y1)
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:red;stroke:black;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-a1+100, scale*pixels[2*i+1]-b1+100, scale, scale);
}
else if(pixels[2*i+0]==x2 && pixels[2*i+1]==y2)
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:blue;stroke:#FFD700;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-a1+100, scale*pixels[2*i+1]-b1+100, scale, scale);
}
else if(pixels[2*i+0]==x3 && pixels[2*i+1]==y3)
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:green;stroke:#FFD700;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-a1+100, scale*pixels[2*i+1]-b1+100, scale, scale);
}
else
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:#FFD700;stroke:#FFD700;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-a1+100, scale*pixels[2*i+1]-b1+100, scale, scale);
}
}
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:red;stroke:#FFD700;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*((x1+x2+x3)/3)-a1+100, scale*((y1+y2+y3)/3)-b1+100, scale, scale);
fclose(fp);
printf("1039.svg created successfully!\n");
}
void Export2HTML(int width, int height)
{
int scale = 10;
int margin = 100;
int i;
int a1 = pixels[0], a2 = pixels[0];
int b1 = pixels[1], b2 = pixels[1];
for(i=1; i<n; i++)
{
if(a1>pixels[2*i+0])
{
a1=pixels[2*i+0];
}
if(a2<pixels[2*i+0])
{
a2=pixels[2*i+0];
}
if(b1>pixels[2*i+1])
{
b1=pixels[2*i+1];
}
if(b2<pixels[2*i+1])
{
b2=pixels[2*i+1];
}
}
a1 *=scale; a2 *=scale;
b1 *=scale; b2 *=scale;
FILE *fp = fopen("1039.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++)
{
if(pixels[2*i+0]==x1 && pixels[2*i+1]==y1)
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:red;stroke:#FFD700;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-a1+100, scale*pixels[2*i+1]-b1+100, scale, scale);
}
else if(pixels[2*i+0]==x2 && pixels[2*i+1]==y2)
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:blue;stroke:#FFD700;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-a1+100, scale*pixels[2*i+1]-b1+100, scale, scale);
}
else if(pixels[2*i+0]==x3 && pixels[2*i+1]==y3)
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:green;stroke:#FFD700;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-a1+100, scale*pixels[2*i+1]-b1+100, scale, scale);
}
else
{
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:#FFD700;stroke:#FFD700;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*pixels[2*i+0]-a1+100, scale*pixels[2*i+1]-b1+100, scale, scale);
}
}
fprintf(fp,"\n<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" style=\"fill:red;stroke:#FFD700;stroke-width:.30;fill-opacity:0.76;stroke-opacity:0.90\"/>", scale*((x1+x2+x3)/3)-a1+100, scale*((y1+y2+y3)/3)-b1+100, scale, scale);
fprintf(fp, "\n </svg>\n");
fprintf(fp, "\n</body>\n</html>\n");
fclose(fp);
printf("1039.html created successfully!\n");
}
void flood(int x, int y, int new_col, int old_col)
{
if (getpixel(x, y) == old_col)
{
putpixel(x, y, new_col);
flood(x + 1, y, new_col, old_col);
flood(x - 1, y, new_col, old_col);
flood(x, y + 1, new_col, old_col);
flood(x, y - 1, new_col, old_col);
}
}
void lineBres(int xa, int ya, int xb, int yb)
{
int k,twoDx,twoDy,twoDyMinusDx,dx,dy,p,slope;
if(xa<xb)
{
dx = xb - xa;
if(ya<yb)
{
dy = yb - ya;
}
else
{
dy=ya-yb;
}
}
else
{
dx = xa - xb;
if(ya<yb)
{
dy = yb - ya;
}
else
{
dy=ya-yb;
}
}
slope=dy/dx;
if(slope>=1)
{
p = 2 * dx - dy;
}
else
{
p = 2 * dy - dx;
}
twoDx = 2 * dx;
twoDy = 2 * dy;
twoDyMinusDx = 2*dy-2*dx;
int x, y;
if (xa > xb)
{
x = xb;
y = yb;
xb = xa;
}
else
{
x = xa;
y = ya;
}
if(m==0)
{
pixels = (int*)malloc(10*(size+1)*sizeof(int));
}
pixels[2*m+0]=x;
pixels[2*m+1]=y;
m++;
if(slope<1)
{
for (k = 0; k <= dx-1; k++)
{
x++;
if (p < 0)
p = p + twoDy;
else
{
y++;
p = p + twoDyMinusDx;
}
pixels[2*m+0]=x;
pixels[2*m+1]=y;
m++;
}
}
else
{
for (k = 0; k <= dy-1; k++)
{
y++;
if (p < 0)
p = p + twoDx;
else
{
x++;
p = p + twoDyMinusDx;
}
pixels[2*m+0]=x;
pixels[2*m+1]=y;
m++;
}
}
n=m;
printf("\nNumber of pixels = %d\n", n);
}
void display()
{
for(int i=0;i<n;i++)
{
if(pixels[2*i+0]==x1 && pixels[2*i+1]==y1)
{
putpixel(pixels[2*i+0],pixels[2*i+1],4);
}
else if(pixels[2*i+0]==x2 && pixels[2*i+1]==y2)
{
putpixel(pixels[2*i+0],pixels[2*i+1],1);
}
else if(pixels[2*i+0]==x3 && pixels[2*i+1]==y3)
{
putpixel(pixels[2*i+0],pixels[2*i+1],2);
}
else
{
putpixel(pixels[2*i+0],pixels[2*i+1],14);
}
}
putpixel((x1+x2+x3)/3,(y1+y2+y3)/3,4);
printf("Done...\n");
}
int makepositive(int x)
{
if(x<0)
{
x=x*(-1);
}
return x;
}
int main()
{
int gd=DETECT,gm;
printf("Enter the A coordinates: ");
scanf("%d%d",&x1,&y1);
printf("Enter the B coordinates: ");
scanf("%d%d",&x2,&y2);
printf("Enter the C coordinates: ");
scanf("%d%d",&x3,&y3);
int a1,b1,c1,a2,b2,c2;
a1=x2-x1;
b1=x3-x2;
c1=x3-x1;
a2=y2-y1;
b2=y3-y2;
c2=y3-y1;
a1=makepositive(a1);
b1=makepositive(b1);
c1=makepositive(c1);
a2=makepositive(a2);
b2=makepositive(b2);
c2=makepositive(c2);
if(a1>=a2 && b1>=b2 && c1>=c2)
{
if(x1>x2 && x2>x3)
{
size=x3;
}
else if(x2>x1 && x2>x3)
{
size=x2;
}
else
{
size=x3;
}
initgraph(&gd,&gm,NULL);
lineBres(x1,y1,x2,y2);
lineBres(x2,y2,x3,y3);
lineBres(x1,y1,x3,y3);
ExportPixels();
Export2HTML(5000,5000);
Export2SVG(5000,5000);
display();
flood(((x1+x2+x3)/3)+1,((y1+y2+y3)/3)+1,3,0);
getch();
}
else
{
printf("Wrong coordinates.");
}
return 0;
}