/**
Nut cracker - The day 21 door for my 2010 Advent calendar
<br>
by <a href="http://www.local-guru.net/blog/">Guru</a>
*/

PVector nutp;
PVector nutv;

void setup() {
    size(300,300,P2D);
  nutp = new PVector( 150, 0 );
  nutv = new PVector( 0, 10 );
}

int hammermode = 0;
float r = 0;
boolean left = false;


void draw() {
  background(255);
  ellipseMode( CENTER );
 
  fill( 250,190, 0 );
  strokeWeight( 3 );
  stroke( 200,128,0 );
  ellipse( nutp.x, nutp.y, 20, 20 );
  line( nutp.x - 10, nutp.y, nutp.x +10, nutp.y );
  PVector test = nutp;
  
  test.add( nutv );
  if (test.y > height-10) {
    nutv = new PVector( nutv.x + random( -nutv.y * 0.1, nutv.y * 0.1), -nutv.y*0.9 );
    nutp.add( nutv );
  } else {
     nutp = test;

  }
  
  if (nutp.x < 0 || nutp.x > width) nutv = new PVector( -nutv.x * 0.8, nutv.y*0.9 );
  nutv.add( new PVector( 0, nutp.y < width ? 1 : 0 ));
  if (nutp.y > width - 9 && nutp.y > 0) nutv = new PVector(0,0);
  
  
  pushMatrix();
  translate( mouseX, mouseY );
  rotate( r );
  noStroke();
  fill( 200,128,0 );
  rect( -5, -50, 10, 50); 
  fill( 20 );
  rect( -15, -60, 30, 10 );
  popMatrix();
  if (hammermode == 1) {
    r += left ? - 0.2 : 0.2;
    if ( r > PI/2 && !left || r < -PI/2 && left ) { 
      r = left ? -PI/2 : PI/2;
      hammermode = 2;
      int sig = left ? -1 : 1;
      if (nutp.x > mouseX + (left? -70 : 40) && nutp.x < mouseX + (left?-40:70) && nutp.y > mouseY -25 && nutp.y < mouseY + 25 ) {
        nutp = new PVector( 150, 0 );
        nutv = new PVector( 0, 10 );
        
      } 
    }
  } else if ( hammermode == 2 ) {
    r -= left  ? -0.1 :0.1;
    if ( r < 0 && !left || r > 0 && left ) { 
      r = 0;
      hammermode = 0;  
    }
  }
}

void mousePressed() {
  hammermode = 1;
  left = nutp.x < mouseX;
}