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// my stuff
// as the player of this game you have three choices, move the turtle forward and backwards
// choose its direction - Either left or right
// I have to create a subclass
#include <iostream>
#include <math.h>
#include "allocore/io/al_App.hpp"
using namespace al;
using namespace std;
// the turtle class
class Turtle {
public:
float x, y;
Turtle(){
x = 0; // this is the starting point for the x
y = 0; // this is the starting point for the y
mUx = 1;
mUy = 0;
}
void move(float ds){
x += mUx * ds;
y += mUy * ds;
}
void turn(float ang){
float ux = mUx;
float uy = mUy;
mUx = ux * cos(ang) - uy * sin(ang);
mUy = uy * cos(ang) + ux * sin(ang);
}
private:
// we make the unit vector private because we provide
// a sperate interface for changing them
float mUx, mUy;
};
class DrawApp : public App{
public:
Mesh myDraw; // calling the mesh for myDraw
Turtle t;
// constructor to what needs to be drawn
DrawApp(){
nav().pos(0,0,20);
initWindow();
}
virtual void onAnimate(double framespersecond){
// myDraw.reset();
myDraw.primitive(Graphics::LINE_STRIP);
myDraw.color(0,0.5,1); // almost a cyan with RGB color coding
// THIS IS WERE I PUT MY ACTIONS
Turtle t;
char myresponse; // I use here char because i want to write a command and not type an int
std::cout << "your turtle just woke up at " << t.x << "," << t.y << " what should it do?" << std::endl;
do{
cin >> myresponse;
// Here I will use conditionals
if (myresponse == 'l')
{
t.turn(M_PI/2);
myDraw.vertex(t.x, t.y);
std::cout << "the turtle turns left and stays at " << t.x << ", " <<t.y << std::endl;
}
else if (myresponse == 'r')
{
t.turn(M_PI/-2); // I divide with -2 because the calculation t.turn(M_PI/-2); turns
myDraw.vertex(t.x, t.y); // the angle left by default. To turn the angle right I divide with -2
std::cout << "the turtle turns right and stays at " << t.x << ", " <<t.y << std::endl;
}
else if (myresponse == 'f')
{
t.move(1);
myDraw.vertex(t.x, t.y);
std::cout << "the turtle steps forward and stops at " << t.x << ", " <<t.y << std::endl;
}
else if (myresponse == 'b')
{
t.move(-1); //forward means to move along the x-axis, so to move back I need to put -1
myDraw.vertex(t.x, t.y);
std::cout << "the turtle moves backwards and stops at " << t.x << ", " <<t.y << std::endl;
}
else if (myresponse == 's')
{
std::cout << "the turtle stops to draw a square" << std::endl;
for(int i=0;i<4;++i){
std::cout << t.x << ", " <<t.y << std::endl;
t.move(5); // we put 1 here "optional" this is ds
t.turn(M_PI/2); // why 4, because 360 divided with 4 is 90
}
std::cout << "done drawing" << t.x << ", " << t.y << std::endl;
}
}while( myresponse != 'Q' );
}
virtual void onDraw(Graphics& g, const Viewpoint& v){
// drawing the graphics
g.draw(myDraw);
g.lineWidth(1.5);
}
private:
};
int main(){
DrawApp().start();
}
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