Draw rectangle and perform operations
Write a C Program to draw rectangle and perform operations in Graphics. Here’s simple C Program to draw rectangle and perform operations in Graphics in C Programming Language.
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.
Below is the source code for C Program to draw rectangle and perform operations in Graphics which is successfully compiled and run on Windows System to produce desired output as shown below :
SOURCE CODE : :
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/* C Program to draw rectangle and perform operations in Graphics */ #include <stdio.h> #include <graphics.h> #include <stdlib.h> #include <math.h> 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); } |
Above is the source code for C Program to draw rectangle and perform operations in Graphics which is successfully compiled and run on Windows System.The Output of the program is shown above .
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