static bool RayTrace(Game game, Vector3 origin, Vector3 dir, float reach,
PickedPos pos, bool clipMode)
{
t.SetVectors(origin, dir);
double reachSq = reach * reach;
Vector3I pOrigin = Vector3I.Floor(origin);
bool insideMap = game.World.IsValidPos(pOrigin);
Vector3 coords;
for (int i = 0; i < 10000; i++)
{
int x = t.X, y = t.Y, z = t.Z;
coords.X = x; coords.Y = y; coords.Z = z;
t.Block = insideMap ?
InsideGetBlock(game.World, x, y, z) : OutsideGetBlock(game.World, x, y, z, pOrigin);
Vector3I coords2 = new Vector3I(t.X, t.Y, t.Z);
//Vector3 min = coords + BlockInfo.RenderMinBB[t.Block];
//Vector3 max = coords + BlockInfo.RenderMaxBB[t.Block];
Vector3 min = coords + BlockInfo.GetMinBB(game, t.Block, coords2);
Vector3 max = coords + BlockInfo.GetMaxBB(game, t.Block, coords2);
double dx = Math.Min(Math.Abs(origin.X - min.X), Math.Abs(origin.X - max.X));
double dy = Math.Min(Math.Abs(origin.Y - min.Y), Math.Abs(origin.Y - max.Y));
double dz = Math.Min(Math.Abs(origin.Z - min.Z), Math.Abs(origin.Z - max.Z));
if (dx * dx + dy * dy + dz * dz > reachSq)
{
return(false);
}
t.Min = min; t.Max = max;
bool intersect = clipMode ? CameraClip(game, pos) : PickBlock(game, pos);
if (intersect)
{
return(true);
}
t.Step();
}
throw new InvalidOperationException("did over 10000 iterations in CalculatePickedBlock(). " +
"Something has gone wrong. (dir: " + dir + ")");
}