//base code for community link project
//draws an ellipse for each member of the community (randomly positioned)
//uses only arrays for data representation (ellipse positions, scale and color)
//note little care taken to random distribution so some ellispe may overlap 
//has an exmplary "Zoe" triangle connected to two ellipse nodes = people
//ZJ Wood 12/13
//*****
//****assignment****
//given your assigned array index - identify 4 people in the class you are connected
//to via a community connection (same socceer team, went to same pre-school, parents
//are friends, etc.)
//write code to draw a line between yourself and your 4 connections
//*note that next we will merge everyone's code to try to draw al the connections but
//start by just mastering how the arrays are indexed


//lots of global data to make things simple - each ellipse has a position, scale and color
int numS;
int numC;
float posX[];
float posY[];
float Red[];
float Green[];
float Blue[];
float ScaleX[];
float ScaleY[];

boolean ZFlag;
boolean allFlag;
boolean outFlag;
float curLink;

//initialize all the data
void setup() {
  size(600, 600);
  smooth();
  background(0);
  
  int i, j;
  float rad, ang;
  numS = 30; //number of students (or community members)
  numC = 4; //numbers of connections
  
  posX = new float[numS];
  posY= new float[numS];
  Red= new float[numS];
  Green= new float[numS];
  Blue= new float[numS];
  ScaleX = new float[numS];
  ScaleY = new float[numS];
  
  ang = 0;
  //fairly cheap random sampling of locations on a circle
  //plus random scale in X and Y and color for appearance
  for (i=0; i < numS; i++) {
    ang += 0.4;
    rad = random(50, 280);
    posX[i] = 300+ rad*sin(ang);
    posY[i] = 300 + rad*cos(ang);
    Red[i] = random(10, 250);
    Green[i] = random(40, 240);
    Blue[i] = random(10, 245);
    ScaleX[i] = random(10, 20);
    ScaleY[i] = random(14, 32);
  }
  ZFlag = false;
  allFlag = false;
  outFlag = true;
  curLink = 0;
  frameRate(6);
  strokeWeight(2);
  
}

//control the draw parameters of the connections - all - incoming or outgoing
void keyPressed() {
  switch(key) {
    case 'a':
      allFlag = !allFlag;
      break;
    case 'o':
      outFlag = !outFlag;
      break;
    case 'z':
      ZFlag = !ZFlag;
      break;
    case 'q':
      exit();
    default:
      println("No key bound to this character");
  }
}


//animation loop - note that framerate is controlling pulse frequency on ellipses in 
//conjunction with the update to curLink - idea being to let each ellipse pulse a few times
//then advance to next person
void draw() {
  
  background(0);
  int i, j;
  
  //draw connections to triangle = Zoe - just left for an example
  if (ZFlag) {
    stroke(100);
    line(20, 20, posX[0], posY[0]);
    line(20, 20, posX[5], posY[5]);
  
    stroke(255);
    fill(#215A25);
    triangle(10, 30, 20, 10, 30, 30);
  }
  
  //draw connections (first for draw order)
  //links always colored based on the originatora
  //TODO Add code here to draw connections between your node and your connections!!!
  
  //draw the people
  stroke(255);
  for (i=0; i < numS; i ++) {
    fill(Red[i], Green[i], Blue[i]);
    //pulse the current person for appearances
    if (i == int(curLink) && !allFlag) {
      if ((int((curLink-int(curLink))*10))%2 == 0) {
        ellipse(posX[i], posY[i], 2*ScaleX[i], 2*ScaleY[i]);
      } else {
        ellipse(posX[i], posY[i], ScaleX[i], ScaleY[i]);
      }
    } else {
      ellipse(posX[i], posY[i], ScaleX[i], ScaleY[i]);
    }
  }
  
  //update current link, slowly to accomodate pulsing animation
  curLink+= 0.1;
  if (int(curLink) == numS)  {
    curLink = 0;
  }
  
}