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cohensutherland code added

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tejasjokin 2023-10-28 01:19:18 +05:30
parent 3cb2781a1d
commit e437dac9bd
2 changed files with 242 additions and 0 deletions
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133
CohenSutherland(UsingDDA).cpp Normal file
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#include<iostream>
#include<graphics.h>
#include<math.h>
#include<cstdlib>
using namespace std;
static int LEFT = 1, RIGHT = 2, BOTTOM = 4, TOP = 8, xmax,ymax,xmin,ymin;
int getcode(int x,int y)
{
int code = 0;
if(y>ymax) code |= TOP;
if(y<ymin) code |= BOTTOM;
if(x<xmin) code |= LEFT;
if(x>xmax) code |= RIGHT;
return code;
}
void line1(int x1,int y1,int x2,int y2)
{
float len;
float dx = x2-x1;
float dy = y2-y1;
if(abs(dx) >= abs(dy))
{
len = abs(dx);
} else {
len = abs(dy);
}
float xin = dx/len;
float yin = dy/len;
float x = x1;
float y = y1;
int i = 0;
while (i<=len)
{
putpixel(round(x),round(y),RED);
x = x + xin;
y = y + yin;
i++;
}
}
int main()
{
int gd = DETECT,gm;
initgraph(&gd,&gm,NULL);
int x1,y1,x2,y2;
cout<<"Enter top left and bottom right coordinates: ";
cin>>xmin>>ymin>>xmax>>ymax;
cout<<"Enter endpoints of line: ";
cin>>x1>>y1>>x2>>y2;
//outtext("Before clipping");
rectangle(xmin,ymin,xmax,ymax);
line1(x1,y1,x2,y2);
delay(10000);
int outcode1 = getcode(x1,y1);
int outcode2 = getcode(x2,y2);
int accept = 0;
while(1)
{
float m = (float)(y2-y1)/(x2-x1);
if(outcode1==0 && outcode2==0)
{
accept = 1;
break;
}
else if((outcode1 & outcode2)!= 0)
{
break;
}
else
{
int x,y;
int temp;
if(outcode1 == 0)
{
temp = outcode2;
}
else
{
temp = outcode1;
}
if(temp & TOP)
{
x = x1 + (ymax - y1)/m;
y = ymax;
}
else if(temp & BOTTOM)
{
x = x1 + (ymin - y1)/m;
y = ymin;
}
else if(temp & LEFT)
{
x = xmin;
y = y1 + m*(xmin - x1);
}
else if(temp & RIGHT)
{
x = xmax;
y = y1 + m*(xmax - x1);
}
if(temp == outcode1)
{
x1 = x;
y1 = y;
outcode1 = getcode(x1,y1);
}
else
{
x2 = x;
y2 = y;
outcode2 = getcode(x2,y2);
}
}
}
setcolor(BROWN);
if(accept)
{
cleardevice();
//outtext("After clipping");
rectangle(xmin,ymin,xmax,ymax);
line1(x1,y1,x2,y2);
}
else
{
cleardevice();
//outtext("After clipping");
rectangle(xmin,ymin,xmax,ymax);
}
getch();
closegraph();
return 0;
}

109
CohenSutherland.cpp Normal file
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#include<iostream>
#include<graphics.h>
#include<math.h>
#include<cstdlib>
using namespace std;
static int LEFT = 1, RIGHT = 2, BOTTOM = 4, TOP = 8, xmax,ymax,xmin,ymin;
int getcode(int x,int y)
{
int code = 0;
if(y>ymax) code |= TOP;
if(y<ymin) code |= BOTTOM;
if(x<xmin) code |= LEFT;
if(x>xmax) code |= RIGHT;
return code;
}
int main()
{
int gd = DETECT,gm;
initgraph(&gd,&gm,NULL);
int x1,y1,x2,y2;
cout<<"Enter top left and bottom right coordinates: ";
cin>>xmin>>ymin>>xmax>>ymax;
cout<<"Enter endpoints of line: ";
cin>>x1>>y1>>x2>>y2;
//outtext("Before clipping");
rectangle(xmin,ymin,xmax,ymax);
line(x1,y1,x2,y2);
delay(10000);
int outcode1 = getcode(x1,y1);
int outcode2 = getcode(x2,y2);
int accept = 0;
while(1)
{
float m = (float)(y2-y1)/(x2-x1);
if(outcode1==0 && outcode2==0)
{
accept = 1;
break;
}
else if((outcode1 & outcode2)!= 0)
{
break;
}
else
{
int x,y;
int temp;
if(outcode1 == 0)
{
temp = outcode2;
}
else
{
temp = outcode1;
}
if(temp & TOP)
{
x = x1 + (ymax - y1)/m;
y = ymax;
}
else if(temp & BOTTOM)
{
x = x1 + (ymin - y1)/m;
y = ymin;
}
else if(temp & LEFT)
{
x = xmin;
y = y1 + m*(xmin - x1);
}
else if(temp & RIGHT)
{
x = xmax;
y = y1 + m*(xmax - x1);
}
if(temp == outcode1)
{
x1 = x;
y1 = y;
outcode1 = getcode(x1,y1);
}
else
{
x2 = x;
y2 = y;
outcode2 = getcode(x2,y2);
}
}
}
setcolor(BROWN);
if(accept)
{
cleardevice();
//outtext("After clipping");
rectangle(xmin,ymin,xmax,ymax);
line(x1,y1,x2,y2);
}
else
{
cleardevice();
//outtext("After clipping");
rectangle(xmin,ymin,xmax,ymax);
}
getch();
closegraph();
return 0;
}