/** 
 * WaveMaker v1.0.1 by cdmb architects (cc) 2008<br />
 * is a simple wave calculator based on input frequencies and<br />
 * the speed of sound at sea level in SI units.<br />
 * <br />
 * Use the scroll bars to adjust the variables.<br />
 * <br />
 * Check the wavelength output.<br />
 * <br />
 * For further information and questions about WaveMaker please<br />
 * take a look at the documentation, the examples, or the <br />
 * website at http://barlieb.com/index.php?option=com_content&amp;task=view&amp;id=75&amp;Itemid=88<br />
 * <br />
 * key combinations:<br />
 * ALT+h hide and show controllers<br />
 * ALT+k bring the key menu to the front. use the arrow keys.<br />
 * Hold the ALT key and move controllers by dragging them.<br />
 */
import controlP5.*;

ControlP5 controlP5;

float amp = 100.0;                                   //Initial Variables
float f = 31.5;                                      //Amplitude & Frequency



void setup() {                                       // Scrollbar Settings
  size(480,480); 
  background(255);
  frameRate(25);
  controlP5 = new ControlP5(this);
  controlP5.addSlider("frequency",0,800,f,1,50,400,12).setId(1);
  controlP5.addSlider("amplitude",0,100,amp,1,65,400,12).setId(2);
  controlP5.setColorBackground(255);
  controlP5.setColorForeground(0);
  controlP5.setColorActive(0xffff0000);
  controlP5.setColorLabel(0);
}
void controlEvent(ControlEvent theEvent) {           // Controls the Scrollbar and Variables
  println("got a control event from controller with id "+theEvent.controller().id());
  switch(theEvent.controller().id()) {
    case(1):
    f = (float)(theEvent.controller().value());
    break;
    case(2):
    amp = (float)(theEvent.controller().value());
    break;
  }
}
void draw() {
  background(255);
  smooth();
  float c = 340.29;                                  //Speed of Sound
  float w = c/f;                                     //Wavelength
  float angle = 0.0;                                 //Initial Angle
  for (int x = 0; x <= width; x+= 1){                //For loop
    float y = (height/2)+sin(angle/w)*amp;           //Sine function
    stroke(240);
    point (x,(height/2)+amp);                        //Lowerline
    point (x,(height/2)-amp);                        //Upperline
    line(120,(height/2)+amp,120,(height/2)-amp);
    line(120*2,(height/2)+amp,120*2,(height/2)-amp);
    line(120*3,(height/2)+amp,120*3,(height/2)-amp);
    line(120*4,(height/2)+amp,120*4,(height/2)-amp);
    stroke(255,0,0);
    point (x,height/2);                              //Centerline
    point (x,y);                                     //Plots the Sine Curve
    line(w*120,(height/2)+amp,w*120,(height/2)-amp);
    angle += PI/60;                                  //Angular Frequency (Pi/(Number of Seconds/Rotation))
  }
  PFont font;                                        // Prints all the Info to the window.
  font=loadFont("CourierNewPSMT-12.vlw");
  textFont(font);
  fill(0);
  text("WaveMaker v1.0.1 ",0,12);
  text("cdmb architects (cc) 2008 ",0,24);
  text("Speed of Sound at Sea Level & 20°C = " + 340.29 + " m/s",0,90);
  fill(255,0,0);
  text("0",7,(height/2)-5);
  text("1",124,(height/2)-5);
  text("2",244,(height/2)-5);
  text("3 m",364,(height/2)-5);
  text(amp,0,(height/2)-amp-5);
  text(-amp,0,(height/2)+amp+15);
  text("Wavelength = " + w + " m",300,460);  
}