/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://studio.sketchpad.cc/sp/pad/view/ro.xXHNmM-VuMn/rev.124
 * 
 * authors: 
 *   J.R.

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



// This sketch builds on a prior work, "JRs Tree", created by J.R.
// http://studio.sketchpad.cc/sp/pad/view/ro.9tnmdQ$VNqRiB/rev.1191


// This sketch builds on a prior work, "Untitled Sketch", created by J.R. Logan
// http://sketchpad.cc/sp/pad/view/ro.tN9WBjP2GFN/rev.75


// All Examples Written by Casey Reas and Ben Fry  
// unless otherwise stated.   

float theta;     
void setup() {  
  size(400,400);  
   frameRate(30);      

}  
int bloom = random(75,150);
int treesize = random(75,100);
int trunkthickness = treesize/4;
int branchthickness = trunkthickness*.6;






void draw() {  
  
    // Sky
    background(192,192,255); 
    // Ground
    color c1 = color(204, 153, 0);
    noStroke();
    fill(c1);
    rect(0, height-25, width, 25);
    // Sets tree color
    stroke(160,120,80);  
    // Sets angle of branches    
    float a = (bloom / (float) width) * 90f;  
  // the bloom variable used to be mouseX to get it to be interactive
  // Convert it to radians  
  theta = radians(a);  
  // Start the tree from the bottom of the screen  
  translate(width/2,height);  
  // Draw a line 60 pixels  
  strokeWeight(trunkthickness);
  line(0,0,0,-mouseY);  
  // Move to the end of that line  
  translate(0,-mouseY);  
  // Start the recursive branching!  
  branch(treesize);  
  }  
  


void branch(float h) {  
  // Each branch will be 2/3rds the size of the previous one  
  h *= 0.66f;  
 strokeWeight(branchthickness);
     
  // All recursive functions must have an exit condition!!!!  
  // Here, ours is when the length of the branch is 2 pixels or less  
  if (h > 2) {  
    
    
    pushMatrix();    // Save the current state of transformation (i.e. where are we now)  
    scale(mouseX*.004);
    rotate(theta);   // Rotate by theta  
    if (h < 5) { stroke(80,120,10);  }
    line(0,0,0,-h);  // Draw the branch  
    translate(0,-h); // Move to the end of the branch  
    branch(h);       // Ok, now call myself to draw two new branches!!  
    strokeWeight(1);
    popMatrix();     
    // Whenever we get back here, we "pop" in order to restore the previous matrix state  
      // Resets to  tree color
    stroke(160,120,80); 
   // Repeat the same thing, only branch off to the "left" this time!  
    pushMatrix();  
     scale(mouseX*.004);
     rotate(-theta);  
      if (h < 7) { stroke(80,120,10);  }
    line(0,0,0,-h);  
     translate(0,-h);  
    branch(h);  
    popMatrix();  
    
    
  }  
}