PLEASE USE C++ PROGRAMMING LANGUAGE Write a program that creates two rectangular

Question

PLEASE USE C++ PROGRAMMING LANGUAGE

Write a program that creates two rectangular shapes and then animates them. The two shapes should start on opposite ends of the screen and then move toward each other. When they meet in the middle of the screen, each shape reverses course and moves toward the edge of the screen. The two shape keep oscillating and bouncing off of each other in the middle of the screen. The program terminates when the shape meet each other in the middle for the tenth times. Your program must use concepts of Object Oriented Programming (Class, polymorphism and virtual functions) Your program must be documented (indentation, comments, good use of variables). Use two different colors to show rectangular shape.

Explanation / Answer

#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 ");
       printf("2.Rotation about an arbitrary point ");
       printf("3.Shear about the origin ");
       printf("4.Exit ");
       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);
}

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.