/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://studio.sketchpad.cc/sp/pad/view/ro.PnRL3HuP3Uo/rev.2226
 * 
 * authors: 
 *   Sayantan Chaudhuri
 *   Joy Bhattacherjee
 *   Joy
 *   
 *   

 * license (unless otherwise specified): 
 *   creative commons attribution-share alike 3.0 license.
 *   https://creativecommons.org/licenses/by-sa/3.0/ 
 */ 



Machh m1;

void setup() { //RUNS ONLY ONCE
    size(300, 500);   //sets the size, as well as height and width vars
    frameRate(30);
    smooth();         //antialiasing
    randomSeed(5310);
    fill(0);
    stroke(0);
    m1 = new Machh(width/2, height/2, 0);
}

void draw() { //RUNS EVERY FRAME
    
    //draws
    fill(255, 10);
    rect(0, 0, width, height);
    m1.draw();
    
    //updates
    m1.update();
}

void mousePressed() {
    setup();
}

class Machh {
    
    float r; //radius, not used
    float x, y;
    float dx, dy;
    float d; //direction, polar and in radians (processing has PI const)
    float m; //magnitude of the vector
    int f;
    
    Machh(float _x, float _y, float _d){
        r=10;
        x=_x;
        y=_y;
        dx=0;
        dy=0;
        m=0;
    }
    
    //ebar, vector bishleshon!
    void update() {
        _move();
        _loop();
    }
    
    //ebong drawing
    void draw() {
        pushMatrix();
        //pushStyle();
        fill(0);
        noStroke();
        translate(x, y);
        rotate(d);
        triangle(r, 0, -r, r, -r, -r);
        //popStyle;
        popMatrix();
    }
    
    void _polToCart(){
        dx=cos(d)*m;
        dy=sin(d)*m;
    }
    void _cartToPol(){
        d=atan( ((mouseY-y)/(mouseX-x)));
        if(mouseX-x < 0)
        d-=PI;
    }
    
    void _move() {
            x+=(mouseX-x)/50;
            y+=(mouseY-y)/50;
            _cartToPol();
    }
    
    
    void _loop() {
        if (x > width+r) x=-r/2;
        else if (x < -r) x=width+r/2;
        if (y > height+r)y=-r/2;
        else if (y < -r) y=height+r/2;
    }
    
}