text: // VCE Project - heat_exchanger_graphics.js
  //
  // Shell & Tube Heat Exchanger Graphics Engine.
  //
  //
  // Requires:
  // - p5.js or p5.min.js
  // - vce_utils.js
  //
  // Andrew D. McGuire 2018
  // a.mcguire227@gmail.com
  //
  // To do:
  // - everything
  // --------------------------------------------------
  function HeatExchangerGraphics(canvas, exchanger, images, debug) {
  
      this.canvas = canvas;
      this.xmax = canvas.width;
      this.ymax = canvas.height;
      this.images = images;
      this.canvas_sf = 0.85;
      this.sid = null;
      this.exchanger = exchanger;
      this.debug = debug;
      this.show_boundaries_log = false;
  
      
      // Methods
      this.show = function() {
  	this._show_background();
      };
  
      this._show_background = function() {
  	push();
  	background(51);
  	pop();
      };
  
      this.update = function() {};
  
  }
  