//////// Exercise 1 rough
//////// Nick Ferro  (CST 112; 9-12-2015)

//// GLOBALS:  coordinates, speed, etc.
float x, y;                            // Position of creature.
float dx, dy;                         // Speed.
float horizon, gravity;
float treeStart = random(0,width);    //spawn location for trees
float shade = 175;                    //transparency on tree mask
float trees = 0;                    //number of trees
float len = 60;                     //length of tree trunk
int state = 0;                      //state for growing forest
float a50 =70;                      //variation on lower foliage
float a210 =200;                    //variation on upper foliage

//// SETUP:  window size, initialization (start in middle of screen).
void setup() {
  size( 640,480);
  horizon=  height/4;
  gravity = 0.1;
  x=  width/2;
  y=  height/2;
  dx=  3;
  dy=  2;

}

//// NEXT FRAME:  scene, action, show.
void draw() {
  //// SCENE:  sky, sun, tree, house, etc.
  noStroke();
  background( 100,150,200 );                // sky
  fill( 255,255,0 );
  ellipse( width*3/4, height/8, 40,40 );    // sun
  // Grass
  fill( 100,200,100 );
  rectMode(CORNER);
  rect( 0,horizon, width,height*3/4 );      // grass.
                                            //forest
  if (state == 1) {       //when 'r' is pressed, generate forest
    trees = 0;            //reset variables for forest
    shade = 175;
    len = 60;
    a50 =70;
    a210 =200;
    background( 100,150,200 );   // redraw forest
    fill( 100,200,100 );
    noStroke();
    rectMode(CORNER);
    rect( 0,horizon+50, width,height*3/4 );
    while (trees <= 40){
      drawTree(treeStart,250, shade, len);
      treeStart = random(0,width);
      a50 =a50-0.5;
      a210 =a210+.5;
      shade = shade -3;
      trees=trees+1;
      len = len + 1;
    }
   state = 0;
  }

                                            // house

  fill(0);
  text( "Nick Ferro", 10,height-20 );                                          
                                            
  //// ACTION:  move (x,y) coordinates.
  x=  x + dx;
  y=  y + dy;
  dy = dy + gravity;
  
  //// SHOW:  display the creature at (x,y)

  /* INSERT YOUR CODE HERE! */
  /* 
  fill(255,0,0); rect( x,y, 30,50 );       
  text( "Fred", x -10, y -25 );
  if ((x>width-30) || (x<0)){
    dx = dx * -.95;
  }
 if (y < 0) {
   dy = dy * -1;
 }
   if (y>height-50) {
    dy = dy * -0.95;
  }
*/
}
//////// FUNCTIONS
void drawTree(float treeX, float treeY, float trans, float lenin){
  rectMode(CORNER);
  noStroke();
  fill(139,69,19);
  rect(treeX-5, treeY-a50, 10, lenin);
  fill(34,139,34);
  quad(treeX-50, treeY-a50, treeX-25, treeY-100, treeX+25, treeY-100, treeX+50, treeY-a50);
  quad(treeX-40, treeY-100, treeX-15, treeY-150, treeX+15, treeY-150, treeX+40, treeY-100);
  triangle(treeX-30, treeY-150, treeX+30, treeY-150, treeX, treeY-a210);
  noStroke();           //MASK
  fill(0,trans);
  rect(treeX-5, treeY-a50, 10, lenin);
  quad(treeX-50, treeY-a50, treeX-25, treeY-100, treeX+25, treeY-100, treeX+50, treeY-a50);
  quad(treeX-40, treeY-100, treeX-15, treeY-150, treeX+15, treeY-150, treeX+40, treeY-100);
  triangle(treeX-30, treeY-150, treeX+30, treeY-150, treeX, treeY-a210);
}


//////// HANDLERS:  mouse clicks, keys
void mousePressed() {
  x=  mouseX;                             // Set (x,y) to mouse
  y=  mouseY;
  //
  dx=  random( -20, +20);                  // random speed.
  dy=  random( -20, +20 );
}

void keyPressed() {
  if (key == 'q') {
    exit();                           // press 'q' key to QUIT.
  }
  if (key == 'r'){                    //press 'r' to reset forest
  state = 1;
  }
}