// CMSC110 Fall 2019 - Assignment#2
   // Created by: Deepak Kumar
   // Date: September 2019
   // Purpose:
   // Exercise to learn how to write functions with parameters.
   // Also, to learn how to use functions to draw an object with
   // varying width and height at any given x, y location on the
   // canvas.
   // This is an exemplar of what Assignment#2 was asking for

void setup() { // set up camvas
   size(500, 500);
   background(200);
   } // setup()

void draw() {
   // nothing to do here, as trucks are drawn
   // inresponse to mouse clicks
   } // draw()

void mousePressed() {
   // Generate truck color
   fill(random(50,200), random(50,200), random(50,200));
   // Get the body size of truck
   float truckBody = random(50, 150);
   draw truck at mouse click
   truck(mouseX, mouseY, truckBody, truckBody*0.7);
   } // mousePressed

void keyPressed() {
   // clear screen
   background(200);
   } // keyPressed()

void truck(float x, float y, float w, float h) {
   // Draw a truck at (x, y) of width w, height h
   float body = 5 * w / 8;
   float hoodW = 3 * w / 8;
   float hoodH = h / 2;
   float wheelS = hoodW/2;

 // Draw a truck
   pushMatrix();
   translate(x, y);

 // Draw body
   stroke(0);
   rect(0, -body, body, body);

 // Draw hood
   rect(body, - hoodH, hoodW, hoodH);
   fill(0);
   rect(body, -hoodH, hoodW, random(hoodH*0.5));
   
   // /headlamp
   fill(0);
   //arc(body+hoodW, -hoodH*0.9, hoodH*0.2, hoodH*0.2, PI/2, -PI/2);
   //arc(body+hoodW, -hoodH*0.8, hoodH*0.4, hoodH*0.4, -PI/2, PI/2);
   rect(body+hoodW, -hoodH, hoodH*0.1, hoodH*0.1);

 // Draw window
   stroke(0);
   line(body, - body, + body + hoodW/2, -hoodH);
   line(body, -body, body, 0);
   line(0, 0, w, 0);

 // Draw wheels
   fill(0);
   ellipse(body/2, 0, wheelS, wheelS);
   ellipse(w-hoodW/2, 0, wheelS, wheelS);
   
   // Draw Number
   fill(0);
   String number = str(int(random(10, 100)));
   text(number, body*0.2, -body*0.5);
   
   popMatrix();
   } // truck()