/** 
 * RadCalc v1.0.2 | Radius Calculator by cdmb architects (cc) 2008<br />
 * is a simple radius calculator based on input panel dimensions and<br />
 * variable panel counts.<br />
 * <br />
 * Use the scroll bars to adjust the variables.<br />
 * <br />
 * Check the radius output.<br />
 * <br />
 * For further information and questions about RadCalc 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 />
 * <br />
 * A future version will let you export a dxf and txt file of the points<br />
 */
import controlP5.*;

ControlP5 controlP5;

float n = 14;                                      // Here are the basic variables
float d = 150;

void setup() {                                     // Scrollbar Settings
  size(500,500); 
  frameRate(25);
  controlP5 = new ControlP5(this);
  controlP5.addSlider("panel size in cm",0,400,d,1,50,400,12).setId(2);
  controlP5.addSlider("number of panels",2,402,n,1,65,400,12).setId(1);
  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):
    n = (float)(theEvent.controller().value());
    break;
    case(2):
    d = (float)(theEvent.controller().value());
    break;
    }
 }
void draw() {
background(255);

float t = (90 * (n-2)) / n;                        // These variables are the basic equation which could be written out...
float x = (tan(radians(t)))*(d/2);                 // however this lets us call all the information out later.
float r = sqrt(sq(x) + sq(d/2));
float g = 360 / n;

for (float deg = 0; deg <= 360; deg += 360/n) {    // for Loop
    float angle = radians(deg);
    float a = (height/2) + (cos(angle)*r/2);
    float b = (width/2) + (sin(angle)*r/2);
     
    stroke(235);                                   // Draws the spokes
    smooth();
    strokeWeight(1);
    line(height/2,width/2,a,b);
    
    stroke(255,0,0);                               // Draws the points 
    smooth();
    strokeWeight(3);
    beginShape(POINTS);
    vertex(a,b);
    endShape();
  }
   
  PFont font;                                      // Prints all the Info to the window.
  font=loadFont("CourierNewPSMT-12.vlw");
  textFont(font);
  fill(0);
  text("RadCalc v1.0.2 | Radius Calculator",0,12);
  text("cdmb architects (cc) 2008 ",0,24);
  text("angle theta = " + t,0,90);
  text("normal x = " + x,0,105);
  text("360/n = " + g,0,120);
  fill(255,0,0);
  text("radius = " + r,345,485);
}