--Equation Builder:

		--Initialize:

		turtle.select(2)

		--Printables:

				io.write("Input equation, increment size, number of dimensions, mirrors, limits first dimension (lower upper), limits second dimension (lower upper), limits third dimension (lower upper)")
						--Input equation: 1 for ellipse, 2 for parabola, 3 for etc
						--Mirros is for mirroring in either X, Y or Z axis. For mirror over X-axis do mirror <= 2, for Z-axis do mirror >= 2. For neither do mirror = 0
		--Wireless Connection:
				--Not yes

		--Variables:
				Args = {...}

		--Parameters:

		InputEquation = tonumber(Args[1])
		i = tonumber(Args[2])								--Incrementer
		dim = tonumber(Args[3])
		mirror = tonumber(Args[4])

		Zmax = tonumber(Args[10])
		Zmin = tonumber(Args[9])
		Z = {}

		Xmax = tonumber(Args[6])
		Xmin = tonumber(Args[5])
		X = Xmin


		if dim > 2 then
				Ymax = tonumber(Args[8])
				Ymin = tonumber(Args[7])
				Y = Zmin
		end

		a = Args[11]
		b = Args[12]
		c = Args[13]
		d = Args[14]
		e = Args[15]
		locX = Xmin
		locZ = Zmin
		locY = Ymin
		Zx = {}
		Yx = {}
		closetoHomeY = 1
		closetoHomeZ = 1


		u = 2 --Basic slot selection
		closetoHome = 1 --Close to start

		--Functions:

				function Eq(Xc,Yc)
						if InputEquation == 1 then
								if dim == 2 then
										return (b/a)*math.sqrt(a^2-Xc^2)		--Rewriten Ellipse of form "x^2/a^2+y^2/b^2==1"
								elseif dim == 3 then
										return (b/(a*c))*math.sqrt(a^2*c^2-c^2*Xc^2-a^2*Yc^2)		--3D Ellipse
								end

						elseif InputEquation == 2 then						--Polynomial
								if dim == 2 then
										return a*X^4+b*X^3+c*X^2+d*X+e
								elseif dim == 3 then

								end
						elseif InputEquation == 3 then

						end
				end

				--Refuels turtle
				function TurtleRefuel()								--Refuel
						if turtle.getFuelLevel() < 320 and turtle.getItemCount(1) > 3 then
								turtle.select(1)
								turtle.refuel(3)
								print("TurtleRefueling")
						end
						turtle.select(u)
				end

				--Item slot selection , for block selection (ignores first item slot which is usually reserved for fuel)
				function SlotSelection()

						if turtle.getItemCount(u) == 0 then
								for k=1,16 do
										if turtle.getItemCount(u) == 0 then

												if u < 16 then
														u=u+1
														turtle.select(u)
												else
														turtle.select(2)
														u=2
												end
										end
								end
						end
				end

				--Place underneath (down) block (even on water and lava)
				function BlockplaceDown()
						SlotSelection()
						if turtle.detectDown() then
								bool,data = turtle.inspectDown()
								if data.name == "minecraft:lava" and data.name == "minecraft:water" and data.name == "minecraft:flowing_water" and data.name == "minecraft:flowing_lava" then
										turtle.placeDown()
								end
						else
								turtle.placeDown()
						end
				end

				--graveldigforward
				function graveldig()								--Gravel Shield for digging and the digging
						os.sleep(9/20)
						if turtle.detect() then
								bool,data=turtle.inspect()
								while data.name ~= "minecraft:flowing_water" and data.name ~= "minecraft:flowing_lava" and turtle.inspect()~= false do
										turtle.dig()
										os.sleep(9/20)
										bool,data=turtle.inspect()
								end
						end
				end

				--Gravel Shield (Ensures that when digging up it will keep digging until all falling blocks are dealt with
				function graveldigUp()								--Gravel Shield for Up digging and the digging Up
						os.sleep(9/20)
						if turtle.detectUp() then
								bool,data=turtle.inspectUp()
								while data.name ~= "minecraft:flowing_water" and data.name ~= "minecraft:flowing_lava" and turtle.inspectUp()~= false do
										turtle.digUp()
										os.sleep(9/20)
										bool,data=turtle.inspect()
								end
						end
				end

				--Forward (in front) dig if something is detected (NO GRAVEL SHIELD!!!)
				function Fdig()
						if turtle.detect() then
								turtle.dig()
						end
				end

				--Dig N move
				function dignmove()
						Fdig()
						graveldig()
						turtle.forward()
				end


				function round(num)
								return math.floor(num+0.5)
				end


				--Max value in a table
				function maxtab(a)
						local values = {}
						for k,v in pairs(a) do
								values[#values+1] = v
						end
						table.sort(values)
						return values[#values]
				end

				--Min value in a table
				function mintab(a)
						local values = {}
						for k,v in pairs(a) do
								values[#values+1] = v
						end
						table.sort(values)
						return values[1]
				end

				--Moves turtle up (it breaks the block above it first (has gavelshield)
				function UpdigMoveUp()
						if turtle.detectUp() then
								turtle.digUp()
						end
						graveldigUp()
						turtle.up()
				end


				--Down dig
				function Ddig()
						if turtle.detectDown() then
								turtle.digDown()
						end
				end


				--Dig N movedown
				function dignmovedown()
						Ddig()
						turtle.down()
				end

		--Code:



				if dim == 3 then
						while locY < Ymax do				--3D Building Loop	This while loop build one volume




								while X < Xmax do
										print("Table Filling")

										table.insert(Zx,X/i,Eq(X,locY))						--Filling in the locations of the blocks in the table

										X = X + i												--Upcounting of the increment
								end

								tabZmax = maxtab(Zx)
								tabZmin = mintab(Zx)

								if math.fmod(tabZmax,2) == 0 then
												tabZmax = tabZmax + 1
								end

								while locZ <= Zmax and locZ >= Zmin do			--This while loop build one floor

										print("Strip building")
										while locX <= Xmax and locX >= Xmin do				--This while loop builds one strip

												--if tabZmax == tabZmax and tabZmin == tabZmin then
														print("Starting For loop strip builder")
														for Xpos = (locX-0.5)/i, (locX+0.5)/i , 1 do
																if Zx[Xpos] == Zx[Xpos] then
																		if Zx[Xpos] ~= nil and Zx[-Xpos]== nil and mirror <= 2 and mirror ~=0 then
																				if (round(Zx[Xpos]) == locZ or round(Zx[Xpos]) == -locZ) and placed~=1 then
																						print("Will place a block")
																						BlockplaceDown()			--Does NOT replace blocks (except water/lava)
																						placed = 1
																				end
																		elseif Zx[-Xpos]~= nil and Zx[Xpos]== nil and mirror >= 2 and mirror ~=0 then
																				if (round(Zx[-Xpos]) == locZ or round(Zx[-Xpos]) == -locZ)  and placed~=1 then
																						print("Will place a block")
																						BlockplaceDown()			--Does NOT replace blocks (except water/lava)
																						placed = 1
																				end

																		elseif Zx[-Xpos]~= nil and Zx[Xpos]~= nil then
																				if (round(Zx[-Xpos]) == locZ or round(Zx[-Xpos]) == -locZ or round(Zx[Xpos]) == locZ or round(Zx[Xpos]) == -locZ )  and placed~=1 then
																						print("Will place a block")
																						BlockplaceDown()			--Does NOT replace blocks (except water/lava)
																						placed = 1
																				end

																		end
																else
																		print("nan value in Zx[Xpos]")
																end
																--print("X:",locX," Z:",locZ, " Eq: ", Eq(Xpos), " Zx[Xpos]:",Zx[Xpos])

														end

												--else
												--		print("nan failure to start strip loop")
											--	end
												placed = 0				--Reset of the placed variable
												dignmove()


												TurtleRefuel()
												if closetoHomeZ == 1 then
														locX = locX + 1			--This is X coordinate for strip away
												else
														locX = locX - 1 		--This is X coordinate for strip back
												end
										end

										if closetoHomeZ == 1 and locZ < Zmax and locZ > Zmin then			--Turn around at the end of a 'strip'
												turtle.turnLeft()
												dignmove()
												turtle.turnLeft()
												locX = Xmax
												closetoHomeZ = 0				--Change from far to close
										else
												turtle.turnRight()
												dignmove()
												turtle.turnRight()
												locX = Xmin
												closetoHomeZ = 1				--Change from close to far

										end



										dignmove()

										if closetoHomeY == 1 then
														locZ = locZ + 1			--This is Z coordinate for floor away
										else
														locZ = locZ - 1 		--This is Z coordinate for floor back
										end

								end

								turtle.turnLeft()
								dignmove()
								turtle.turnLeft()
								locY = locY + 1									--Keeps track of Y coordinate

								--3D module
								if closetoHomeY == 1 and locY < Ymax and locY >= Ymin then			--Turn around at the end of a 'floor'
										turtle.turnLeft()
										UpdigMoveUp()
										turtle.turnLeft()
										locZ = Zmax

										closetoHomeY = 0				--Change from far to close


								else
										turtle.turnRight()
										UpdigMoveUp()
										turtle.turnRight()
										locZ = Zmin

										closetoHomeY = 1				--Change from close to far

								end

						end




				end		--3D if loop closer