/*
This file is part of Massive Comprehension Machine
by Lot Amorós
http://mcm.feenelcaos.org

Massive Comprehension Machine is free software:
you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License.

Massive Comprehension Machine is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Massive Comprehension Machine.  If not, see <http://www.gnu.org/licenses/>.

One part of this code is based on the book Visualizing Data from Ben Fry.
*/

class Edge {
  Node from;
  Node to;
  float len;
  int count;
  boolean near;
  String context;                  //The context when the words are found

  Edge(Node from, Node to) {
    this.from = from;
    this.to = to;
    this.len = 50;
    this.near = false;
    this.context="";
  }
  
  void increment() {
    count++;
  }
  
  void relax() {
    float vx = to.x - from.x;
    float vy = to.y - from.y;
    float d = mag(vx, vy);
    if (d > 0) {
      float f = (len - d) / (d * 3);
      float dx = f * vx;
      float dy = f * vy;
      to.dx += dx;
      to.dy += dy;
      from.dx -= dx;
      from.dy -= dy;
    }
  }

  void draw() {
    if (searchMode){                                              //If a word is searched
      if ((from.count+zoom) > filtro && (to.count+zoom)>filtro)
      if (this.near){
        stroke(edgeColor);
        strokeWeight(count);
        line(from.x, from.y, to.x, to.y);
      }
    }
    else{                                                         //Normal mode
      if ((from.count+zoom) > filtro && (to.count+zoom)>filtro) {
      stroke(edgeColor);
      strokeWeight(count);
      line(from.x, from.y, to.x, to.y);
    }
  }
}
}