#include 
#include 
#include 
#include 
#include 
#include 

#define ORG -50

double face1[5][2] = {
			    { 250, 125 },
			    { 350, 125 },
			    { 350, 225 },
			    { 250, 225 },
			    { 250, 125 }
		           };

double face2[5][2] = {
			    { 250+ORG, 125-ORG },
			    { 350+ORG, 125-ORG },
			    { 350+ORG, 225-ORG },
			    { 250+ORG, 225-ORG },
			    { 250+ORG, 125-ORG }
		           };

double angle = 5.0 * M_PI / 180;
double midx1, midy1, midx2, midy2;

void rotate (void)
{
    int i;
    for (i=0; i<5; i++)
    {
	double xnew, ynew;

	xnew = midx1 + (face1[i][0] - midx1) * cos (angle) -
	       (face1[i][1] - midy1) * sin (angle);
	ynew = midy1 + (face1[i][0] - midx1) * sin (angle) +
		(face1[i][1] - midy1) * cos (angle);

	face1[i][0] = xnew;
	face1[i][1] = ynew;

	xnew = midx2 + (face2[i][0] - midx2) * cos (angle) -
		(face2[i][1] - midy2) * sin (angle);
	ynew = midy2 + (face2[i][0] - midx2) * sin (angle) +
		(face2[i][1] - midy2) * cos (angle);

	face2[i][0] = xnew;
	face2[i][1] = ynew;
    }

    cleardevice();

    for (i=0; i<4; i++)
    {
	setcolor(7);
	line (face1[i][0], face1[i][1], face1[i+1][0], face1[i+1][1]);
	setcolor(8);
	line (face2[i][0], face2[i][1], face2[i+1][0], face2[i+1][1]);
	setcolor(9);
	line (face1[i][0], face1[i][1], face2[i][0], face2[i][1]);
    }

    delay (125);
}

void main()
{
    int gd = DETECT, gm;

    midx1 = (face1[0][0] + face1[1][0]) / 2.0;
    midy1 = (face1[1][1] + face1[2][1]) / 2.0;
    midx2 = (face2[0][0] + face2[1][0]) / 2.0;
    midy2 = (face2[1][1] + face2[2][1]) / 2.0;

    initgraph (&gd, &gm, "..\\bgi");

    while (!kbhit())
	rotate();

    closegraph();
}

The post C Program to implement 3-D rotation with respect to x-axis, y-axis and z-axis first appeared on Student Projects.

#include 
#include 
#include 
#define MAX 20

enum { TOP = 0x1, BOTTOM = 0x2, RIGHT = 0x4, LEFT = 0x8 };

enum { FALSE, TRUE };
typedef unsigned int outcode;

outcode compute_outcode(int x, int y,
		int xmin, int ymin, int xmax, int ymax)
{
    outcode oc = 0;

    if (y > ymax)
	oc |= TOP;
    else if (y < ymin)
	oc |= BOTTOM;


    if (x > xmax)
	oc |= RIGHT;
    else if (x < xmin)
	oc |= LEFT;

    return oc;
}

void cohen_sutherland (double x1, double y1, double x2, double y2,
		double xmin, double ymin, double xmax, double ymax)
{
    int accept;
    int done;
    outcode outcode1, outcode2;

    accept = FALSE;
    done = FALSE;

    outcode1 = compute_outcode (x1, y1, xmin, ymin, xmax, ymax);
    outcode2 = compute_outcode (x2, y2, xmin, ymin, xmax, ymax);
    do
    {
	if (outcode1 == 0 && outcode2 == 0)
	{
	    accept = TRUE;
	    done = TRUE;
	}
	else if (outcode1 & outcode2)
	{
	    done = TRUE;
	}
	else
	{
	    double x, y;
	    int outcode_ex = outcode1 ? outcode1 : outcode2;
	    if (outcode_ex & TOP)
	    {
		x = x1 + (x2 - x1) * (ymax - y1) / (y2 - y1);
		y = ymax;
	    }

	    else if (outcode_ex & BOTTOM)
	    {
		x = x1 + (x2 - x1) * (ymin - y1) / (y2 - y1);
		y = ymin;
	    }
	    else if (outcode_ex & RIGHT)
	    {
		y = y1 + (y2 - y1) * (xmax - x1) / (x2 - x1);
		x = xmax;
	    }
	    else
	    {
		y = y1 + (y2 - y1) * (xmin - x1) / (x2 - x1);
		x = xmin;
	    }
	    if (outcode_ex == outcode1)
	    {
		x1 = x;
		y1 = y;
		outcode1 = compute_outcode (x1, y1, xmin, ymin, xmax, ymax);
	    }
	    else
	    {
		x2 = x;
		y2 = y;
		outcode2 = compute_outcode (x2, y2, xmin, ymin, xmax, ymax);
	    }
	}
    } while (done == FALSE);

    if (accept == TRUE)
	line (x1, y1, x2, y2);
}



void main()
{
    int n;
    int i, j;
    int ln[MAX][4];
    int clip[4];
    int gd = DETECT, gm;

    printf ("Enter the number of lines to be clipped");
    scanf ("%d", &n);

    printf ("Enter the x- and y-coordinates of the line-endpoints:\n");
    for (i=0; i
The post C Program to implement the Cohen-Sutherland line-clipping algorithm. first appeared on Student Projects.
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			18
		
		
			
		
		
		https://studentprojects.in/software-development/c-tutorials/c/graphics/c-program-to-create-a-house-and-perform-the-operations/
					https://studentprojects.in/software-development/c-tutorials/c/graphics/c-program-to-create-a-house-and-perform-the-operations/#comments
		
		
		Fri, 02 Oct 2009 10:14:18 +0000
				
		
		
		
		
		http://studentprojects.in/?p=830

					C Program to create a house like figure and perform the following operations.

	a. Scaling about the origin followed by translation.

        b. Scaling with reference to an arbitrary point.

        c. Reflect about the line y = mx + c.

The post C Program to create a house and perform the operations. first appeared on Student Projects.
]]>
										C Program to create a house like figure and perform the following operations.

	a. Scaling about the origin followed by translation.

        b. Scaling with reference to an arbitrary point.

        c. Reflect about the line y = mx + c.

#include 
#include 
#include 
#include 
#include 

void reset (int h[][2])
{
    int val[9][2] = {
			{ 50, 50 },{ 75, 50 },{ 75, 75 },{ 100, 75 },
			{ 100, 50 },{ 125, 50 },{ 125, 100 },{ 87, 125 },{ 50, 100 }
		    };
    int i;
    for (i=0; i<9; i++)
    {
	h[i][0] = val[i][0]-50;
	h[i][1] = val[i][1]-50;
    }
}
void draw (int h[][2])
{
    int i;
    setlinestyle (DOTTED_LINE, 0, 1);
    line (320, 0, 320, 480);
    line (0, 240, 640, 240);
    setlinestyle (SOLID_LINE, 0, 1);
    for (i=0; i<8; i++)
	line (320+h[i][0], 240-h[i][1], 320+h[i+1][0], 240-h[i+1][1]);
    line (320+h[0][0], 240-h[0][1], 320+h[8][0], 240-h[8][1]);
}
void rotate (int h[][2], float angle)
{
    int i;
    for (i=0; i<9; i++)
    {
	int xnew, ynew;
	xnew = h[i][0] * cos (angle) - h[i][1] * sin (angle);
	ynew = h[i][0] * sin (angle) + h[i][1] * cos (angle);
	h[i][0] = xnew; h[i][1] = ynew;
    }
}
void scale (int h[][2], int sx, int sy)
{
    int i;
    for (i=0; i<9; i++)
    {
	h[i][0] *= sx;
	h[i][1] *= sy;
    }
}
void translate (int h[][2], int dx, int dy)
{
    int i;
    for (i=0; i<9; i++)
    {
	h[i][0] += dx;
	h[i][1] += dy;
    }
}
void reflect (int h[][2], int m, int c)
{
	int i;
	float angle;
	for (i=0; i<9; i++)
		h[i][1] -= c;
	angle = M_PI/2 - atan (m);
	rotate (h, angle);
	for (i=0; i<9; i++)
		h[i][0] = -h[i][0];
	angle = -angle;
	rotate (h, angle);
	for (i=0; i<9; i++)
		h[i][1] += c;
}

void ini()
{
	int gd=DETECT,gm;
	initgraph(&gd,&gm,"..\\bgi");
}
void dini()
{
	getch();
	closegraph();
}
void main()
{

	int h[9][2],sx,sy,x,y,m,c,choice;
	do
	{
		clrscr();
		printf("1. Scaling about the origin.\n");
		printf("2. Scaling about an arbitrary point.\n");
		printf("3. Reflection about the line y = mx + c.\n");
		printf("4. Exit\n");
		printf("Enter the choice: ");
		scanf("%d",&choice);
		switch(choice)
		{
			case 1: printf ("Enter the x- and y-scaling factors: ");
				scanf ("%d%d", &sx, &sy);
				ini();
				reset (h);
				draw (h);getch();
				scale (h, sx, sy);
				cleardevice();
				draw (h);
				dini();
				break;

			case 2: printf ("Enter the x- and y-scaling factors: ");
				scanf ("%d%d", &sx, &sy);
				printf ("Enter the x- and y-coordinates of the point: ");
				scanf ("%d%d", &x, &y);
				ini();
				reset (h);
				translate (h, x, y);// Go to arbitrary point
				draw(h); getch();//Show its arbitrary position
				cleardevice();
				translate(h,-x,-y);//Take it back to origin
				draw(h);
				getch();
				cleardevice();
				scale (h, sx, sy);//Now Scale it
				draw(h);
				getch();
				translate (h, x, y);//Back to Arbitrary point
				cleardevice();
				draw (h);
				putpixel (320+x, 240-y, WHITE);
				dini();
				break;

			case 3: printf ("Enter the values of m and c: ");
				scanf ("%d%d", &m, &c);
				ini();
				reset (h);
				draw (h); getch();
				reflect (h, m, c);
				cleardevice();
				draw (h);
				dini();
				break;
			
			case 4: exit(0);
		}
	}while(choice!=4);
}
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			1
		
		
			
		
		
		https://studentprojects.in/software-development/c-tutorials/c/graphics/c-program-to-draw-a-rectangle-and-perform-the-operations/
					https://studentprojects.in/software-development/c-tutorials/c/graphics/c-program-to-draw-a-rectangle-and-perform-the-operations/#comments
		
		
		Fri, 02 Oct 2009 10:11:58 +0000
				
		
		
		
		
		
		
		http://studentprojects.in/?p=828

					C Program to draw a rectangle and perform the following operations.

	a. Rotation about the origin followed by translation.

	b. Rotation about an arbitrary point.

	c. Apply X shear and Y shear on the rectangle.

The post C Program to draw a rectangle and perform the operations. first appeared on Student Projects.
]]>
										C Program to draw a rectangle and perform the following operations.

	a. Rotation about the origin followed by translation.

	b. Rotation about an arbitrary point.

	c. Apply X shear and Y shear on the rectangle.

#include 
#include 
#include 
#include 

void draw (int r[][2])
{
    int i;
    setlinestyle (DOTTED_LINE, 0, 1);
    line (320, 0, 320, 480);
    line (0, 240, 640, 240);

    setlinestyle (SOLID_LINE, 0, 1);
    line (320+r[0][0], 240-r[0][1], 320+r[1][0], 240-r[1][1]);
    line (320+r[0][0], 240-r[0][1], 320+r[3][0], 240-r[3][1]);
    line (320+r[1][0], 240-r[1][1], 320+r[2][0], 240-r[2][1]);
    line (320+r[2][0], 240-r[2][1], 320+r[3][0], 240-r[3][1]);
}

void reset (int r[][2])
{
    int i;
    int val[4][2] = {
			{ 0, 0 },{ 100, 0 },{ 100, 50 },{ 0, 50 }
		    };
	for (i=0; i<4; i++)
    {
	r[i][0] = val[i][0];
	r[i][1] = val[i][1];
    }
}

void rotate (int r[][2], int angle)
{
    int i;
    double ang_rad = (angle * M_PI) / 180;
    for (i=0; i<4; i++)
    {
	double xnew, ynew;
	xnew = r[i][0] * cos (ang_rad) - r[i][1] * sin (ang_rad);
	ynew = r[i][0] * sin (ang_rad) + r[i][1] * cos (ang_rad);
	r[i][0] = xnew;
	r[i][1] = ynew;
    }
}

void shear (int r[][2], int sx, int sy)
{
    int i;
    for (i=0; i<4; i++)
    {
	int xnew, ynew;
	xnew = r[i][0] + r[i][1] * sx;
	ynew = r[i][1] + r[i][0] * sy;
	r[i][0] = xnew;
	r[i][1] = ynew;
    }
}

void translate (int r[][2], int dx, int dy)
{
    int i;
    for (i=0; i<4; i++)
    {
	r[i][0] += dx;
	r[i][1] += dy;
    }
}

void ini()
{
	int gd=DETECT,gm;
	initgraph(&gd,&gm,"..//bgi");
}
void main()
{

	int r[4][2],angle,dx,dy,x, y,choice;

	do
	{
		clrscr();
		printf("1.Rotation about the origin followed by translation\n");
		printf("2.Rotation about an arbitrary point\n");
		printf("3.Shear about the origin\n");
		printf("4.Exit\n\n");
		printf("Enter your choice: ");
		scanf("%d",&choice);
		switch(choice)
		{
			case 1: printf("Enter the rotation angle: ");
				scanf("%d", &angle);
				printf("Enter the x- and y-coordinates for translation: ");
				scanf("%d%d",&dx,&dy);
				ini();
				cleardevice();
				reset(r);
				draw(r);getch();
				rotate(r, angle);
				cleardevice();
				draw(r);getch();
				translate(r,dx,dy);
				cleardevice();
				draw(r);getch();
				closegraph();
				break;
			case 2: printf("Enter the rotation angle: ");
				scanf("%d",&angle);
				printf("Enter the x- and y-coordinates of the point: ");
				scanf("%d%d",&x,&y);
				ini();
				cleardevice();
				reset(r);
				translate(r,x,y);
				draw(r);
				putpixel(320+x,240-y,WHITE);
				getch();
				translate(r,-x,-y);
				draw(r);getch();
				rotate(r,angle);
				draw(r);getch();
				translate(r,x,y);
				cleardevice();
				draw(r);
				putpixel(320+x,240-y,WHITE);
				getch();
				closegraph();
				break;
			case 3: printf("Enter the x- and y-shears: ");
				scanf("%d%d",&x,&y);
				ini();
				reset(r);
				draw(r);getch();
				shear(r, x, y);
				cleardevice();
				draw (r);getch();
				closegraph();
				break;
			case 4: closegraph();
		}
	}while(choice!=4);
}
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			1
		
		
			
		
		
		https://studentprojects.in/software-development/c-tutorials/c/graphics/c-program-to-implement-the-midpoint-circle-drawing-algorithm/
					https://studentprojects.in/software-development/c-tutorials/c/graphics/c-program-to-implement-the-midpoint-circle-drawing-algorithm/#comments
		
		
		Fri, 02 Oct 2009 10:09:47 +0000
				
		
		
		
		
		http://studentprojects.in/?p=825

					C Program to implement the midpoint circle drawing algorithm to draw a circle. Modify the algorithm toimplement specified arc or sector.

The post C Program to implement the midpoint circle drawing algorithm first appeared on Student Projects.
]]>
										C Program to implement the midpoint circle drawing algorithm to draw a circle. Modify the algorithm toimplement specified arc or sector.

#include 
#include 
#include 
#include 

#define PI 3.14

float startangle,endangle;
int x,y;

int Can_draw( float theta )
{
	if( theta >= startangle && theta<= endangle )
		return 1;
	return 0;
}

void Circlepoints(int x,int y,int xc,int yc)
{
	float theta;
	theta = atan( (float)y/x );
	theta = theta * (180/M_PI);
	
if( Can_draw(theta))
		putpixel(xc+x,yc-y,WHITE);
	if( Can_draw(360-theta))
		putpixel(xc+x,yc+y,WHITE);
	
if( Can_draw(90-theta))
		putpixel(xc+y,yc-x,WHITE);
	if( Can_draw(270+theta))
		putpixel(xc+y,yc+x,WHITE);
	
if( Can_draw(180-theta))
		putpixel(xc-x,yc-y,WHITE);
	if( Can_draw(180+theta))
		putpixel(xc-x,yc+y,WHITE);
	
if( Can_draw(90+theta))
		putpixel(xc-y,yc-x,WHITE);
	if( Can_draw(270-theta))
		putpixel(xc-y,yc+x,WHITE);
}

void MidPointcircle(int xc,int yc,int rad)
{
	float d = (5/4.0) - rad;
	x=0,y=rad;

	while(y>x)
	{
		if(d<0) 
 			d += 2*x+3;
		else 	
			d+=(2*x)-(2*y)+5,y--;
		x++;
		Circlepoints(x,y,xc,yc);
		delay(90);
	}
}
void main()
{
	int gd=DETECT,gm;
	int radius,xc,yc,choice,temp;
	float xstart,ystart,xend,yend;
	initgraph(&gd,&gm,"..\\bgi");
	do
	{
		clrscr();
		cleardevice();
		printf("\n Enter your choice\n");
		printf("\n 1.Draw a Circle\n 2.Draw a Sector\n 3.Draw an Arc\n 4.Exit\n");
		scanf("%d",&choice);
		switch(choice)
		{
			case 1: printf("\n Enter the center:");
				scanf("%d %d",&xc,&yc);
				printf("\n Enter the radius:");
				scanf("%d",&radius);
				cleardevice();
				startangle=0,endangle=360;
				MidPointcircle(xc,yc,radius);
				getch();
				break;

			case 2: printf("\n Enter the center:");
				scanf("%d %d",&xc,&yc);
				printf("\n Enter the radius:");
				scanf("%d",&radius);
				printf("\n Enter the startangle:");
				scanf("%f",&startangle);
				printf("\n Enter the endangle:");
				scanf("%f",&endangle);
				cleardevice();
				if(startangle>endangle)
				{
					temp=startangle;
					startangle=endangle;
					endangle=temp;
				}
				MidPointcircle(xc,yc,radius);
				xstart=xc+radius*cos(PI/180*startangle);
				ystart=yc-radius*sin(PI/180*startangle);
				xend=xc+radius*cos(PI/180*endangle);
				yend=yc-radius*sin(PI/180*endangle);
				line(xc,yc,xstart,ystart);
				line(xc,yc,xend,yend);
				getch();
				break;

			case 3: printf("\n Enter the center:");
				scanf("%d %d",&xc,&yc);
				printf("\n Enter the radius:");
				scanf("%d",&radius);
				printf("\n Enter the startangle:");
				scanf("%f",&startangle);
				printf("\n Enter the endangle:");
				scanf("%f",&endangle);
				cleardevice();
				if(startangle>endangle)
				{
					temp=startangle;
					startangle=endangle;
					endangle=temp;
				}
				MidPointcircle(xc,yc,radius);
				getch();
				break;

		       case 4:  closegraph();
		}
	}while(choice!=4);
}
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			12
		
		
			
		
		
		https://studentprojects.in/software-development/c-tutorials/c/graphics/c-program-to-display-a-line-graph-using-midpoint-line-algorithm/
					https://studentprojects.in/software-development/c-tutorials/c/graphics/c-program-to-display-a-line-graph-using-midpoint-line-algorithm/#comments
		
		
		Fri, 02 Oct 2009 10:07:21 +0000
				
		
		
		
		http://studentprojects.in/?p=823

					Program to display a line graph using midpoint line algorithm. The input to the program is a set of data corresponding to the X and Y-axes. Data parts are to be displayed as asterisk (*) according to the input specification.

The post C Program to display a line graph using midpoint line algorithm. first appeared on Student Projects.
]]>
										Program to display a line graph using midpoint line algorithm. The input to the program is a set of data corresponding to the X and Y-axes. Data parts are to be displayed as asterisk (*) according to the input specification.

#include
#include
#include
#include

#define MAX 20

void swap(int* a,int* b)
{
	int t=*a;
	*a=*b;
	*b=t;
}

void midpointline(int x1,int y1,int x2,int y2)
{
	int dx,dy,d,incry,incre,incrne,slopegt1=0;
	dx=abs(x1-x2);dy=abs(y1-y2);
	if(dy>dx)
	{
		swap(&x1,&y1);
		swap(&x2,&y2);
		swap(&dx,&dy);
		slopegt1=1;
	}
	if(x1>x2)
	{
		swap(&x1,&x2);
		swap(&y1,&y2);
	}
	if(y1>y2)
		incry=-1;
	else
		incry=1;
	d=2*dy-dx;
	incre=2*dy;
	incrne=2*(dy-dx);
	while(x1
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			2