/// <summary>
/// Tries to retrieve targeted <see cref="IMyTerminalBlock"/> on a grid within a given distance.
/// </summary>
private bool TryGetTargetedBlockInternal(double maxDist, out IMyTerminalBlock target)
{
IMyCubeGrid cubeGrid;
IHitInfo rayInfo;
MatrixD transform = MyAPIGateway.Session.Camera.WorldMatrix;
Vector3D headPos = transform.Translation, forward = transform.Forward;
if (!LocalPlayer.IsSpectating)
{
headPos += (headPos - LocalPlayer.Position).Length() * forward;
}
LineD line = new LineD(headPos, headPos + forward * maxDist);
target = null;
if ((LocalPlayer.IsControllingCharacter || LocalPlayer.IsSpectating) &&
LocalPlayer.TryGetTargetedGrid(line, out cubeGrid, out rayInfo))
{
// Retrieve blocks within about half a block of the ray intersection point.
var sphere = new BoundingSphereD(rayInfo.Position, (cubeGrid.GridSizeEnum == MyCubeSize.Large) ? 1.3 : .3);
double currentDist = double.PositiveInfinity, currentCenterDist = double.PositiveInfinity;
tempGrid.SetGrid(cubeGrid, true);
targetBuffer.Clear();
tempGrid.GetBlocksInsideSphere(cubeGrid, targetBuffer, ref sphere);
foreach (IMySlimBlock slimBlock in targetBuffer)
{
IMyCubeBlock cubeBlock = slimBlock?.FatBlock;
if (cubeBlock != null)
{
var topBlock = cubeBlock as IMyAttachableTopBlock;
if (topBlock != null)
{
cubeBlock = topBlock.Base;
}
}
var tBlock = cubeBlock as IMyTerminalBlock;
if (tBlock != null)
{
// Find shortest dist between the bb and the intersection.
BoundingBoxD box = cubeBlock.WorldAABB;
double newDist = Math.Round(box.DistanceSquared(rayInfo.Position), 3),
newCenterDist = Math.Round(Vector3D.DistanceSquared(box.Center, rayInfo.Position), 3);
// If this is a terminal block, check to see if this block is any closer than the last.
// If the distance to the bb is zero, use the center dist, favoring smaller blocks.
if (
(currentDist > 0d && newDist < currentDist) ||
(Math.Abs(currentDist - newDist) < 0.02 && newCenterDist < currentCenterDist)
)
{
target = tBlock;
currentDist = newDist;
currentCenterDist = newCenterDist;
}
}
}
}
tempGrid.Reset();
return(target != null);
}
public static double Distance(this BoundingBoxD first, BoundingBoxD second)
{
return(Math.Sqrt(first.DistanceSquared(second)));
}
