4 posts
Posted 22 November 2012 - 04:18 AM
One of the simple programs I needed to create was something to draw circles in the world. This is not the most complex program out there and the main reason I want to post it is to get feedback and possible improvements.
Code:
Code:
local r = 0
currSlot = 1
print("What radius of circle would you like me to create?")
r = tonumber(io.read())
if r == 0 then
print("Radius 0 circle? Done!")
end
function findBlock ()
if turtle.getItemCount(currSlot) ~= 0 then
return true
end
local tmp = 1
turtle.select(1)
while (turtle.getItemCount(tmp) == 0 and tmp <= 15) do
tmp=tmp+1
turtle.select(tmp)
end
while (turtle.getItemCount(tmp) == 0 and tmp == 16) do
-- Send a message to the evil demon Speaking Turtle.
rednet.open("right")
rednet.send(8, "Bunny needs blocks!", false)
rednet.close("right")
print("Bunny needs blocks!")
sleep(5)
end
return true
end
function tryPlaceDown ()
if turtle.placeDown() == false then
exit()
end
end
round = function (inputN)
if inputN % 2 ~= 0.5 then
return math.floor(inputN + 0.5)
end
return inputN - 0.5
end
turtle.select(currSlot)
local coords = {}
local coordsCount = 0
local f = 1 - r
local ddF_x = 1
local ddF_y = -2 * r
local x = 0
local y = r
coords[0 .. "," .. round(0+r)] = true
coords[0 .. "," .. round(0-r)] = true
coords[0+r .. "," .. 0] = true
coords[0-r .. "," .. 0] = true
coordsCount = 4
while (x < y) do
if (f >= 0) then
y = y - 1
ddF_y = ddF_y + 2
f = f + ddF_y
end
x = x + 1
ddF_x = ddF_x + 2
f = f + ddF_x
coords[round(0+x) .. "," .. round(0+y)] = true
coords[round(0-x) .. "," .. round(0+y)] = true
coords[round(0+x) .. "," .. round(0-y)] = true
coords[round(0-x) .. "," .. round(0-y)] = true
coords[round(0+y) .. "," .. round(0+x)] = true
coords[round(0-y) .. "," .. round(0+x)] = true
coords[round(0+y) .. "," .. round(0-x)] = true
coords[round(0-y) .. "," .. round(0-x)] = true
coordsCount = coordsCount + 8
end
checkCoords = function (x0,y0)
if coords[x0 .. "," .. y0] == true then
return true
else
return false
end
end
-- Move from the center to the first position it can find.
x = 0
y = 0
while checkCoords(x,y) ~= true do
turtle.forward()
x = x + 1
end
-- Place a block in the first position.
findBlock()
turtle.placeDown()
-- Keep track of which way the turtle is facing.
facingX = 1
facingY = 0
-- Look clockwise from each block and find the next block in the space.
spinsDone = 0
while (coordsCount > 0 and spinsDone < 5) do
cX = x + facingX
cY = y + facingY
if checkCoords(cX, cY) then
turtle.forward()
findBlock()
turtle.placeDown()
x = cX
y = cY
coords[x .. "," .. y] = nil
coordsCount = coordsCount - 1
spinsDone = 0
else
-- Check diagnals
if facingX == 1 then
cY = y + 1
newFacingX = 0
newFacingY = 1
elseif facingX == -1 then
cY = y - 1
newFacingX = 0
newFacingY = -1
elseif facingY == 1 then
cX = x - 1
newFacingX = -1
newFacingY = 0
elseif facingY == -1 then
cX = x + 1
newFacingX = 1
newFacingY = 0
end
if checkCoords(cX,cY) then
turtle.forward()
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
findBlock()
turtle.placeDown()
x = cX
y = cY
coords[x .. "," .. y] = nil
coordsCount = coordsCount - 1
spinsDone = 0
else
turtle.turnRight()
facingX = newFacingX
facingY = newFacingY
spinsDone = spinsDone + 1
end
end
end