finish final preperation stage

sparkmachine/lua/quarry.lua

@@ -137,6 +137,15 @@ local function timer_trigger(pos, elapsed)
 			strut_line_y(pos.x,        pos.y,        pos.z,        marker_pos.y)
 		elseif framenum == 0 then
 			--shrink the operational area here to a 2d space with one piece of border taken away to drill there
+			posx, pos2x = order(pos.x, marker_pos.x)
+			posy, pos2y = order(pos.y, marker_pos.y)
+			posz, pos2z = order(pos.z, marker_pos.z)
+			posx = posx +1
+			pos2x = pos2x -1
+			posy = posy + 1
+			pos2y = pos2y -1
+			meta:set_string("dig_area_start", { x= posx, y= posy, z= posz})
+			meta:set_string("dig_area_end", { x= pos2x, y= pos2y, z= posz}) -- can use this last z as counter, or ignore it
 		end
 		minetest.debug(framenum)
 	end