#include "boundary.h"

boundary::boundary()
{
	filename="";
}

boundary::boundary(string file,float vol)
{
	openFile(file);
	sound.setVolume(vol);
}

boundary::~boundary()
{
}


void boundary::draw(){
	if (points.size()>1) {
		for (int i=0;i<points.size();i++) {
			ofLine(points[i],points[(i+1)%points.size()]);
		}
		ofDrawBitmapString(filename,centroid);
	}
}

void boundary::add(ofPoint p){
	points.push_back(p);
	getCentroid();
}
void boundary::undo(){
	if (points.size()>0) {
		points.erase(points.end()-1);
		getCentroid();
	}
}

void boundary::getCentroid(){
	float y=0;
	float maxx=-1;
	float minx=100000;
	for (int i=0;i<points.size();i++) {
		y+=points[i].y;
		minx=min(minx,points[i].x);
		maxx=max(maxx,points[i].x);
	}
	centroid=ofPoint(minx+((maxx-minx)*0.1),y/points.size(),0);
}

bool boundary::contains(ofPoint p)
//winding rule algorithm for 2D polygon containment test
//thanks to Paul Bourke
//http://local.wasp.uwa.edu.au/~pbourke/geometry/insidepoly/
{
  int counter = 0;
  int i;
  double xinters;
  ofPoint p1,p2;

  p1 = points[0];
  for (i=1;i<=points.size();i++) {
    p2 = points[i % points.size()];
    if (p.y > min(p1.y,p2.y)) {
      if (p.y <= max(p1.y,p2.y)) {
        if (p.x <= max(p1.x,p2.x)) {
          if (p1.y != p2.y) {
            xinters = (p.y-p1.y)*(p2.x-p1.x)/(p2.y-p1.y)+p1.x;
            if (p1.x == p2.x || p.x <= xinters)
              counter++;
          }
        }
      }
    }
    p1 = p2;
  }

  if (counter % 2 == 0)
    return false;
  else
    return true;
}
int boundary::findPoint(ofPoint pos){
    int threshold=6;
    int selected=-1;
    for (int i=0;i<points.size();i++) {
        if (abs(points[i].x-pos.x)<=threshold&&abs(points[i].x-pos.x)<=threshold) {
            selected=i;
        }
    }
    return selected;
}
void boundary::openFile(string file) {
	filename=file;
	if (filename.length()>0) {
		if (sound.loadSound(filename)) sound.setLoop(false);
		else printf("failed to load %s\n",filename.c_str());
	}
}
bool boundary::checkFile(ofPoint pos,string file) {
	if (contains(pos)) {
	    sound.stop();
	    openFile(file);
	    return true;
	}
	else return false;
}
bool boundary::checkClick(ofPoint pos){
	if (contains(pos)&&sound.isLoaded()&&!sound.getIsPlaying()) {
	    sound.play();
	    return true;
	}
	else return false;
}
void boundary::setVolume(float vol){
	sound.setVolume(vol);
}