Warm$-$up:

Use the shapeFunStart.cpp code in canvas. If you need to review setting up a OpenCV assignment, use the module$1$ powerpoint & ShowPicture assignment $($and$/$or copy your showpicture assignment and edit the code$).$

Simple Turtle like drawing

Start with calling init$()$

changePosition$()$ will move the turtle to any location on the screen

$0,0$ is the upper left corner

$500,500$ is bottom right corner

changeDirection$()$ will point the turtle in any direction

$0$ right, $90--$ down, $180--$ left, $270$ up

moveForward$()$ will move the turtle forward the given number of pixels leaving a line behind.

Code for square given. Add code to draw a triangle $($turn $120),$ pentagon $($turn $72)$ and star $($turn $144)$

Daily Assignment:

#if $0($or comment out$)$ the warm$-$up code

Remove the #if FULL$\_$DAILY$\_$ASSIGNMENT and corresponding #endif statements

Add the Pentagon and Star classes that derive from the shape virtual base class so they work with the given main$().$

Submit your $*.$cpp file and a screenshot showing your shapes being drawn.$//$ ShapeFun.cpp : This file contains the 'main' function. Program execution begins and ends there.

#include

#include "opencv$2/$core$.$hpp$"$

#include "opencv$2/$imgproc$.$hpp$"$

#include "opencv$2/$highgui$.$hpp$"$

#include

#include

using namespace cv;

using namespace std;

#define M$\_$PI $3\mathrm{.}14159265358979323846264338327950288$

#define degToRad$($angleInDegrees$)(($angleInDegrees$)*$ M$\_$PI $/180\mathrm{.}0)$

char wndname$[]=$ "TurtleWindow";

Mat image $=$ Mat::zeros$(500,500,$ CV$\_8$UC$3)$;

Scalar WHITE$(255,255,255)$;

const int DELAY $=1$;

Point $\_$curPosition$(250,250)$;

int $\_$direction $=0$;

$//$

$//$ Must be called in main$()$ before any other drawing function

$//$

void init$()$

$\{$

imshow$($wndname$,$ image$)$;

waitKey$($DELAY$)$;

$\}$

$//$

$//$ Move the pen to the given coordinates without leaving a mark

$//$

$//$ Note $(0,0)$ refers to the upper left corner

$//(500,500)$ refers to the bottom right corner

$//$

void changePosition$($int x$,$ int y$)$

$\{$

$\_$curPosition.x $=$ x;

$\_$curPosition.y $=$ y;

$\}$

$//$

$//$ point in the direction given in degrees

$//0==>$ point right

$//90==>$ point down

$//180==>$ point left

$//270==>$ point up

$//$

void changeDirection$($int direction$)$

$\{$

$\_$direction $=$ direction;

$\}$

$//$

$//$ Moves the pen forward the given number of pixels

$//$ Note leaves a mark creating a line from the previous point

$//$ to the new point

$//$

void moveForward$($int nPixels$)$

$\{$

int x $=$ static$\_$cast$($round$($nPixels $*$ cos$($degToRad$(\_$direction$))))$;

int y $=$ static$\_$cast$($round$($nPixels $*$ sin$($degToRad$(\_$direction$))))$;

Point newPoint $=$ Point$($x $+\_$curPosition.x$,$ y $+\_$curPosition.y$)$;

line$($image$,\_$curPosition, newPoint, WHITE$)$;

$\_$curPosition $=$ newPoint;

$//$ cout $<<$ "moved to $"<<$ newPoint.x $<<","<<$ newPoint.y $<<"$ dir:" $<<\_$direction $<<$ endl;

imshow$($wndname$,$ image$)$;

waitKey$($DELAY$)$;

$\}$

void main$()$

$\{$

init$()$;

changePosition$(200,200)$;

int direction $=0$;

for $($int i $=0$; i $<4$; i$++)$

$\{$

changeDirection$($direction$)$;

moveForward$(100)$;

direction $+=90$;

$\}$

waitKey$(10000)$;

$\}$

#if FULL$\_$DAILY$\_$ASSIGNMENT $//$ remove this line for the full daily assignment

class Shape

$\{$

public:

virtual void Draw$()=0$;

Shape$($int x$,$ int y$,$ int size $=0)$

$\{$

$\_$x $=$ x;

$\_$y $=$ y;

$\_$size $=$ size;

$\}$

protected:

int $\_$x;

int $\_$y;

int $\_$size;

$\}$;

class Square : public Shape

$\{$

public:

Square$($int x$,$ int y$,$ int size$)$ : Shape$($x$,$ y$,$ size$)\{\}$

virtual void Draw$()$

$\{$

changePosition$(\_$x$,\_$y$)$;

int myDirection $=0$;

changeDirection$($myDirection$)$;

for $($int i $=0$; i $<4$; i$++)$

$\{$

moveForward$(\_$size$)$;

myDirection $+=90$;

changeDirection$($myDirection$)$;

$\}$

$\}$

$\}$;

$/*$ Add a Pentagon and a Star classes that inherit from the public shape base class $*/$

void drawShapes$($Shape$*$ shapeArr$[3])$

$\{$

for $($int i $=0$; i $<3$; i$++)$

$($shapeArr$[$i$])->$Draw$()$;

$\}$

int main$()$

$\{$

init$()$;

Shape$*$ myShapes$[3]=\{$

new Square$(200,200,50),$

new Pentagon$(100,100,75),$

new Star$(300,300,100)$

$\}$;

drawShapes$($myShapes$)$;

waitKey$(10000)$;

$\}$

#endif $//$ remove this line for the full daily assignment