added easier strut_line_dir functions

sparkmachine/lua/quarry.lua

@@ -69,6 +69,38 @@ local function clear_area(pos, pos2)
 	end
 end
 
+local function place_strut(x, y, z)
+	local position = { x=x3, y=y, z=z }
+	if minetest.get_node(position) == "air" then
+		minetest.set_node(position, { name = NAME .. "static_strut"})
+	end
+end
+
+
+local function strut_line_x(x, y, z, x2)
+	local minx = min(x, x2)
+	local maxx = max(x, x2)
+	for x3=xmin, xmax do
+		place_strut(x3, y, z)
+	end
+end
+
+local function strut_line_y(x, y, z, y2)
+	local miny = min(y, y2)
+	local maxy = max(y, y2)
+	for y3=ymin, ymax do
+		place_strut(x, y3, z)
+	end
+end
+
+local function strut_line_z(x, y, z, z2)
+	local minz = min(z, z2)
+	local maxz = max(z, z2)
+	for z3=zmin, zmax do
+		place_strut(x, y, z3)
+	end
+end
+
 local function struct_line(pos, pos2)
 	local minx = pos.x
 	local maxx = pos2.x