//forest array prototyping
//Nick Ferro   sept 20 2015

float horizon;
float [] xpos = new float[41];
float [] a50 = new float[41];
float [] a210 = new float[41];
float [] shade = new float[41];
float [] len = new float[41];
float x = 100;

void setup(){
  size(640,480);
  background( 100,150,200 );
  horizon =  height/4;
  for (int i = 0; i < xpos.length; i++){
    xpos [i] = random(0,width);
  } 
  for (int i = 0; i < a50.length; i++){
    a50 [i] = 70 - (i*.5);
  } 
  for (int i = 0; i < a210.length; i++){
    a210 [i] = 200 + (i*.5);
  } 
  for (int i = 0; i < shade.length; i++){
    shade [i] = 175 - (i*3);
  } 
  for (int i = 0; i < len.length; i++){
    len [i] = 60 + (i);
  } 
}

void draw() {
  background( 100,150,200 );
    fill( 100,200,100 );
    noStroke();
    rectMode(CORNER);
    rect( 0,horizon+50, width,height*3/4 );
  for (int i = 0; i <xpos.length; i++) { 
   drawTree(xpos[i], 250, shade[i], len[i], a50[i], a210[i]);
    
  }
  fill(255);
 stroke(0);
  rect(x,100,100,100);
  x=x+2; 
} 
    
    
    
    
void drawTree(float treeX, float treeY, float trans, float lenin, float a50, float a210){
  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);
}