public BlockSelection GetSelectedBlock(float maxDistance, BlockFilter filter = null)
{
float distanceSq = 0;
// Get the face where our ray will exit
BlockFacing lastExitedBlockFace = GetExitingFullBlockFace(pos, ref lastExitedBlockFacePos);
if (lastExitedBlockFace == null)
{
return(null);
}
float maxDistanceSq = (maxDistance + 1) * (maxDistance + 1);
// Wander along the block exiting faces until we collide with a block selection box
while (!RayIntersectsBlockSelectionBox(pos, filter))
{
if (distanceSq >= maxDistanceSq)
{
return(null);
}
pos.Offset(lastExitedBlockFace);
lastExitedBlockFace = GetExitingFullBlockFace(pos, ref lastExitedBlockFacePos);
if (lastExitedBlockFace == null)
{
return(null);
}
distanceSq = pos.DistanceSqTo(ray.origin.X - 0.5f, ray.origin.Y - 0.5f, ray.origin.Z - 0.5f);
}
if (hitPosition.SquareDistanceTo(ray.origin) > maxDistance * maxDistance)
{
return(null);
}
return(new BlockSelection()
{
Face = hitOnBlockFace,
Position = pos.Copy(),
HitPosition = hitPosition.SubCopy(pos.X, pos.Y, pos.Z),
SelectionBoxIndex = hitOnSelectionBox
});
}
public bool RayIntersectsBlockSelectionBox(BlockPos pos, BlockFilter filter)
{
if (filter?.Invoke(pos, blockSelectionTester.GetBlock(pos)) == false)
{
return(false);
}
Cuboidf[] selectionBoxes = blockSelectionTester.GetBlockIntersectionBoxes(pos);
if (selectionBoxes == null)
{
return(false);
}
bool intersects = false;
for (int i = 0; i < selectionBoxes.Length; i++)
{
tmpCuboidd.Set(selectionBoxes[i]).Translate(pos.X, pos.Y, pos.Z);
if (RayIntersectsWithCuboid(tmpCuboidd, ref hitOnBlockFaceTmp, ref hitPositionTmp))
{
if (intersects && hitPosition.SquareDistanceTo(ray.origin) <= hitPositionTmp.SquareDistanceTo(ray.origin))
{
continue;
}
hitOnSelectionBox = i;
intersects = true;
hitOnBlockFace = hitOnBlockFaceTmp;
hitPosition.Set(hitPositionTmp);
}
}
return(intersects);
}
public bool RayIntersectsBlockSelectionBox(BlockPos pos, BlockFilter filter)
{
if (filter?.Invoke(pos, blockSelectionTester.GetBlock(pos)) == false)
{
return(false);
}
Cuboidf[] selectionBoxes = blockSelectionTester.GetBlockIntersectionBoxes(pos);
if (selectionBoxes == null)
{
return(false);
}
bool intersects = false;
bool wasDecor = false;
for (int i = 0; i < selectionBoxes.Length; i++)
{
tmpCuboidd.Set(selectionBoxes[i]).Translate(pos.X, pos.Y, pos.Z);
if (RayIntersectsWithCuboid(tmpCuboidd, ref hitOnBlockFaceTmp, ref hitPositionTmp))
{
bool isDecor = selectionBoxes[i] is DecorSelectionBox;
if (intersects && (!wasDecor || isDecor) && hitPosition.SquareDistanceTo(ray.origin) <= hitPositionTmp.SquareDistanceTo(ray.origin))
{
continue;
}
hitOnSelectionBox = i;
intersects = true;
wasDecor = isDecor;
hitOnBlockFace = hitOnBlockFaceTmp;
hitPosition.Set(hitPositionTmp);
}
}
if (intersects && selectionBoxes[hitOnSelectionBox] is DecorSelectionBox dsb)
{
Vec3i posAdjust = dsb.PosAdjust;
if (posAdjust != null)
{
pos.Add(posAdjust);
}
}
return(intersects);
}