nearestVertexTo (coords: Coords2d): number {
var bestVertex = -1;
var bestDist = 0;
for (var i = 0; i < 3; i++) {
var distance = coords.distanceFrom(this.vertexCoords[i]);
if (bestVertex < 0 || distance < bestDist) {
bestVertex = i;
bestDist = distance;
}
}
return bestVertex;
}