Explain the changes you made to the code. Discuss the work you completed by focusing on the different tactics you used to create a fully realized $2$D animation. What were the changes you chose to make? What was your intent behind them? How did you approach coding to successfully create this outcome?

using namespace std;

const float DEG$2$RAD $=3\mathrm{.}14159/180$;

void processInput$($GLFWwindow$*$ window$)$;

enum BRICKTYPE $\{$ REFLECTIVE, DESTRUCTABLE, PADDLE $\}$;

enum ONOFF $\{$ ON$,$ OFF $\}$;

class Brick$\{$

public:

float red, green, blue;

float x$,$ y$,$ width;

int health; $//$ track the brick's health

BRICKTYPE brick$\_$type;

ONOFF onoff;

Brick$($BRICKTYPE bt$,$ float xx$,$ float yy$,$ float ww$,$ float rr$,$ float gg$,$ float bb$)\{$

brick$\_$type $=$ bt; x $=$ xx; y $=$ yy$,$ width $=$ ww; red $=$ rr$,$ green $=$ gg$,$ blue $=$ bb;

onoff $=$ ON;

health $=10$;$\}$;

void drawBrick$()\{$

if $($onoff $==$ ON$)\{$

double halfside $=$ width $/1$;

glColor$3$d$($red$,$ green, blue$)$;

glBegin$($GL$\_$POLYGON$)$;

glVertex$2$d$($x $+$ halfside, y $+$ halfside$)$;

glVertex$2$d$($x $+$ halfside, y $-$ halfside$)$;

glVertex$2$d$($x $-$ halfside, y $-$ halfside$)$;

glVertex$2$d$($x $-$ halfside, y $+$ halfside$)$;

glEnd$()$;$\}\}\}$;

Brick paddle$($PADDLE$,-0\mathrm{.}0,-1\mathrm{.}0,0\mathrm{.}1,1,0,1)$;

class Circle$\{$

public:

float red, green, blue;

float radius;

float x;

float y;

float speed $=0\mathrm{.}03$;

int direction; $//1=$up $2=$right $3=$down $4=$left $5=$ up right $6=$ up left $7=$ down right $8=$ down left

ONOFF onoff;

Circle$($double xx$,$ double yy$,$ double rr$,$ int dir, float rad, float r$,$ float g$,$ float b$)\{$

x $=$ xx;

y $=$ yy;

radius $=$ rr;

red $=$ r;

green $=$ g;

blue $=$ b;

radius $=$ rad;

direction $=$ dir;

onoff $=$ ON;$\}$

void CheckCollision$($Brick$*$ brk$)\{$

if $($brk$->$brick$\_$type $==$ REFLECTIVE && onoff $==$ ON$)\{$

if $(($x $>$ brk$->$x $-$ brk$->$width && x $<=$ brk$->$x $+$ brk$->$width$)$ && $($y $>$ brk$->$y $-$ brk$->$width && y $<=$ brk$->$y $+$ brk$->$width$))\{$

direction $=$ GetRandomDirection$()$;

x $=$ x $+0\mathrm{.}03$;

y $=$ y $+0\mathrm{.}04$;$\}\}$

$//$ make a brick into a paddle that reflects balls and can move

else if $($brk$->$brick$\_$type $==$ PADDLE && onoff $==$ ON$)\{$

if $(($x $>$ brk$->$x $-$ brk$->$width && x $<=$ brk$->$x $+$ brk$->$width$)$ && $($y $>$ brk$->$y $-$ brk$->$width && y $<=$ brk$->$y $+$ brk$->$width$))\{$

direction $=$ GetRandomDirection$()$;

x $=$ x $+0\mathrm{.}03$;

y $=$ y $+0\mathrm{.}04$;$\}\}$

else if $($brk$->$brick$\_$type $==$ DESTRUCTABLE && brk$->$onoff $==$ ON

&& brk$->$health $>0$ && onoff $==$ ON$)//$ added check for $"$ON$"$ to prevent destroyed bricks causing collisions $\{$

if $(($x $>$ brk$->$x $-$ brk$->$width && x $<=$ brk$->$x $+$ brk$->$width$)$ && $($y $>$ brk$->$y $-$ brk$->$width && y $<=$ brk$->$y $+$ brk$->$width$))\{$

brk$->$health$--$;

if $($brk$->$health $<=0)//$ check brk health, if $0$ or less, turn brick off$\{$

brk$->$onoff $=$ OFF;$\}$

brk$->$green $=1\mathrm{.}0$;$//$ brk was hit but still has health, change color

direction $=$ GetRandomDirection$()$;

x $=$ x $+0\mathrm{.}03$;

y $=$ y $+0\mathrm{.}04$;$\}\}\}$

int GetRandomDirection$()\{$

return $($rand$()\%8)+1$;$\}$

void MoveOneStep$()\{$

if $($y $<=-1+$ radius$)\{$

onoff $=$ OFF;$\}$

if $($direction $==1||$ direction $==5||$ direction $==6)//$ up$\{$

if $($y $>-1+$ radius$)\{$

y $-=$ speed;$\}$

else$\{$

direction $=$ GetRandomDirection$()$; $\}\}$

if $($direction $==2||$ direction $==5||$ direction $==7)//$ right$\{$

if $($x $<1-$ radius$)\{$

x $+=$ speed;$\}$

else$\{$

direction $=$ GetRandomDirection$()$;$\}\}$

if $($direction $==3||$ direction $==7||$ direction $==8)//$ down$\{$

if $($y $<1-$ radius$)\{$

y $+=$ speed;$\}$

else$\{$

direction $=$ GetRandomDirection$()$;$\}\}$

if $($direction $==4||$ direction $==6||$ direction $==8)//$ left$\{$

if $($x $>-1+$ radius$)\{$

x $-=$ speed;$\}$

else$\{$

direction $=$ GetRandomDirection$()$;$\}\}\}$

void DrawCircle$()\{$

if $($onoff $==$ ON$)\{$

glColor$3$f$($red$,$ green, blue$)$;

glBegin$($GL$\_$POLYGON$)$;

for $($int i $=0$; i $<360$; i$++)\{$

float degInRad $=$ i $*$ DEG$2$RAD;

glVertex$2$f$(($cos$($degInRad$)*$ radius$)+$ x$,($sin$($degInRad$)*$ radius$)+$ y$)$;$\}$

glEnd$()$;$\}\}\}$;

vector world;

int main$($void$)\{$

srand$($time$($NULL$))$;

if $(!$glfwInit$())\{$

exit$($EXIT$\_$FAILURE$)$;$\}$

glfwWindowHint$($GLFW$\_$CONTEXT$\_$VERSION$\_$MAJOR, $2)$;

glfwWindowHint$($GLFW$\_$CONTEXT$\_$VERSION$\_$MINOR, $0)$;

GLFWwindow$*$ window $=$ glfwCreateWindow$(480,480,$ "Random World of Circles", NULL, NULL$)$;

if $(!$window$)\{$

glfwTerminate$()$;

exit$($EXIT$\_$FAILURE$)$;$\}$

glfwMakeContextCurrent$($window$)$;

glfwSwapInterval$(1)$;

$//$ row of brick accross the middle

Brick brick$2($DESTRUCTABLE$,-1\mathrm{.}0,0\mathrm{.}33,0\mathrm{.}2,1,0,1)$;

Brick brick$3($DESTRUCTABLE$,-0\mathrm{.}8,0\mathrm{.}33,0\mathrm{.}2,1,0,1)$;

Brick brick$4($DESTRUCTABLE$,-0\mathrm{.}6,0\mathrm{.}33,0\mathrm{.}2,1,0,1)$;

Brick brick$5($DESTRUCTABLE$,-0\mathrm{.}4,0\mathrm{.}33,0\mathrm{.}2,1,0,1)$;

Brick brick$6($DESTRUCTABLE$,-0\mathrm{.}2,0\mathrm{.}33,0\mathrm{.}2,1,0,1)$;

Brick brick$7($DESTRUCTABLE$,-0\mathrm{.}0,0\mathrm{.}33,0\mathrm{.}2,1,0,1)$;

Brick brick$8($DESTRUCTABLE$,0\mathrm{.}2,0\mathrm{.}33,0\mathrm{.}2,1,0,1)$;

Brick brick$9($DESTRUCTABLE$,0\mathrm{.}4,0\mathrm{.}33,0\mathrm{.}2,1,0,1)$;

Brick brick$10($DESTRUCTABLE$,0\mathrm{.}6,0\mathrm{.}33,0\mathrm{.}2,1,0,1)$;

Brick brick$11($DESTRUCTABLE