lib/data/d3.js
function d3_geom_hullCCW(i1, i2, i3, v) {
  var t, a, b, c, d, e, f;
  t = v[i1]; a = t[0]; b = t[1];
  t = v[i2]; c = t[0]; d = t[1];
  t = v[i3]; e = t[0]; f = t[1];
  return ((f-b)*(c-a) - (d-b)*(e-a)) > 0;
}
function d3_geom_hullCCW(i1, i2, i3, v) {
  var t, a, b, c, d, e, f;
  t = v[i1]; a = t[0]; b = t[1];
  t = v[i2]; c = t[0]; d = t[1];
  t = v[i3]; e = t[0]; f = t[1];
  return ((f-b)*(c-a) - (d-b)*(e-a)) > 0;
}
function d3_geom_hullCCW ( i1 , i2 , i3 , v ) { var t , a , b , c , d , e , f ; t = v [ i1 ] ; a = t [ 0 ] ; b = t [ 1 ] ; t = v [ i2 ] ; c = t [ 0 ] ; d = t [ 1 ] ; t = v [ i3 ] ; e = t [ 0 ] ; f = t [ 1 ] ; return ( ( f - b ) * ( c - a ) - ( d - b ) * ( e - a ) ) > 0 ; }
are three points in counter-clockwise order?
are three points in counter - clockwise order?