Difference between revisions of "Redstone (event)"
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(Added a second more complete example of usage, and how you might treat this event.) |
m (The NeedsWork note seems to have already been fixed.) |
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{{Event | {{Event | ||
|name=redstone | |name=redstone | ||
| Line 9: | Line 7: | ||
|code= | |code= | ||
while true do | while true do | ||
| − | event = os.pullEvent("redstone") | + | local event = os.pullEvent("redstone") |
print("Redstone input changed.") | print("Redstone input changed.") | ||
end | end | ||
| − | |output=This will tell one when the redstone event is triggered. Note this doesn't tell you the side of the event. | + | |output=This will tell one when the redstone event is triggered. Note that this doesn't tell you the side of the event. |
}}=== Application === | }}=== Application === | ||
{{Example | {{Example | ||
| Line 18: | Line 16: | ||
|code= | |code= | ||
-- Set up a list which contains the sides as keys, and the current redstone state of each side as a boolean value | -- Set up a list which contains the sides as keys, and the current redstone state of each side as a boolean value | ||
| − | statelist = { | + | local statelist = { |
["top"] = rs.getInput("top"), | ["top"] = rs.getInput("top"), | ||
["front"] = rs.getInput("front"), | ["front"] = rs.getInput("front"), | ||
| Line 32: | Line 30: | ||
while true do -- Start an endless loop | while true do -- Start an endless loop | ||
| − | os.pullEvent("redstone") -- | + | os.pullEvent("redstone") -- Yield the computer until some redstone changes |
-- We don't care what the event returns, since the first variable will be "redstone" and the rest will be nil. | -- We don't care what the event returns, since the first variable will be "redstone" and the rest will be nil. | ||
| − | --Now we check each side to see if it's changed. | + | -- Now we check each side to see if it's changed. |
for side, state in pairs(statelist) do -- Run the lines of code in this loop for each key/value pair in statelist | for side, state in pairs(statelist) do -- Run the lines of code in this loop for each key/value pair in statelist | ||
if rs.getInput(side) ~= state then -- If the side we're checking doesn't match what it was last time we checked then | if rs.getInput(side) ~= state then -- If the side we're checking doesn't match what it was last time we checked then | ||
Latest revision as of 04:35, 25 March 2014
 Event redstone | |
| Fired when any Redstone inputs change on any of the sides of the computer. | |
| Returned Object 1 | Nothing |
Basic Usage
 Example | |
| Alerts via console output when a redstone input changes. | |
| Code |
while true do
local event = os.pullEvent("redstone")
print("Redstone input changed.")
end
|
| Output | This will tell one when the redstone event is triggered. Note that this doesn't tell you the side of the event. |
Application
| Example | |
| This program will store the values of each redstone signal on load, and on each state change. It will further display on the screen which state was changed. | |
| Code |
-- Set up a list which contains the sides as keys, and the current redstone state of each side as a boolean value
local statelist = {
["top"] = rs.getInput("top"),
["front"] = rs.getInput("front"),
["left"] = rs.getInput("left"),
["right"] = rs.getInput("right"),
["back"] = rs.getInput("back"),
["bottom"] = rs.getInput("bottom"),
}
-- Ready the terminal for printing to
term.clear()
term.setCursorPos(1,1)
while true do -- Start an endless loop
os.pullEvent("redstone") -- Yield the computer until some redstone changes
-- We don't care what the event returns, since the first variable will be "redstone" and the rest will be nil.
-- Now we check each side to see if it's changed.
for side, state in pairs(statelist) do -- Run the lines of code in this loop for each key/value pair in statelist
if rs.getInput(side) ~= state then -- If the side we're checking doesn't match what it was last time we checked then
print(side.." is now "..tostring(rs.getInput(side))) -- Print the new state of the side.
statelist[side] = rs.getInput(side) -- Update the statelist with the new change
end
end
end
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