static bool RayTrace(Game game, Vector3 origin, Vector3 dir, float reach,
PickedPos pos, bool clipMode)
{
t.SetVectors(origin, dir);
BlockInfo info = game.BlockInfo;
float reachSq = reach * reach;
Vector3I pOrigin = Vector3I.Floor(origin);
for (int i = 0; i < 10000; i++)
{
int x = t.X, y = t.Y, z = t.Z;
t.Block = GetBlock(game.World, x, y, z, pOrigin);
Vector3 min = new Vector3(x, y, z) + info.MinBB[t.Block];
Vector3 max = new Vector3(x, y, z) + info.MaxBB[t.Block];
if (info.IsLiquid(t.Block))
{
min.Y -= 1.5f / 16; max.Y -= 1.5f / 16;
}
float dx = Math.Min(Math.Abs(origin.X - min.X), Math.Abs(origin.X - max.X));
float dy = Math.Min(Math.Abs(origin.Y - min.Y), Math.Abs(origin.Y - max.Y));
float 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 + ")");
}
static bool IsHackBlock(BlockID b)
{
return(b == Block.DoubleSlab || b == Block.Bedrock ||
b == Block.Grass || BlockInfo.IsLiquid(b));
}
