private bool IsVisible(int a, int b)
{
float ax = _nodes[a].x;
float ay = _nodes[a].z;
float bx = _nodes[b].x;
float by = _nodes[b].z;
float abx = bx - ax;
float aby = by - ay;
float sqrDist = SomeMath.SqrDistance(ax, ay, bx, by);
isVisibleTemp.Clear();
DDARasterization.DrawLine(ax - chunkPos.x, ay - chunkPos.y, bx - chunkPos.x, by - chunkPos.y, edgeMapPiselSize, IsVisibleDelegate);
foreach (var edge in isVisibleTemp)
{
if (edge.Contains(a, b))
{
continue;
}
float ix, iy;
if (SomeMath.RayIntersect(ax, ay, abx, aby, _nodes[edge.a].x, _nodes[edge.a].z, _nodes[edge.b].x, _nodes[edge.b].z, out ix, out iy) && SomeMath.SqrDistance(ax, ay, ix, iy) < sqrDist)
{
return(false);
}
}
return(true);
//Vector2 aPos = _nodes[a].positionV2;
//Vector2 bPos = _nodes[b].positionV2;
//Vector2 dir = bPos - aPos;
//float curSqrDist = SomeMath.SqrDistance(aPos, bPos);
//foreach (var edge in edges) {
// if (edge.Contains(a, b))
// continue;
// Vector2 intersection;
// if (SomeMath.RayIntersectXZ(
// aPos, dir, //from, direction
// NodePosV2(edge.a), NodePosV2(edge.b), //a, b
// out intersection)
// && SomeMath.SqrDistance(aPos, intersection) < curSqrDist) {
// //Debuger3.AddRay(new Vector3(intersection.x, 0, intersection.y), Vector3.up, Color.magenta);
// //Debuger3.AddLine(ds.NodePosV3(a), new Vector3(intersection.x, 0, intersection.y), Color.magenta);
// //Debuger3.AddLine(ds.NodePosV3(b), new Vector3(intersection.x, 0, intersection.y), Color.magenta);
// return false;
// }
//}
//return true;
}
