43 posts
US
Posted 27 January 2013 - 08:55 PM
I'm going to assume that you can at least understand this:
If you didn't get that, then here's an explanation.
It will be either red, white, blue, green, or orange.
It will last until you ctrl-t terminate it or break the computer.
As you may know, you can use os.startTimer(paramTime) to queue a timed event. What you may not know is: it returns a unique timer ID.
With this id and a little ingenuity, you can make it only call a function when the last timer is called. EX:
If you need an explanation:
It will draw nothing if you click before the 2 seconds passes.
I hope you're following me, this is my first tutorial in awhile :P/>
Now, to make it a drag function.
Initialize the currentTimer as 0 so we don't get errors.
Initialize drag so we don't get errors.
Let's make a function that runs when we perform a "proper drag"
Next, I'll start our loop
Get input
Let's see if the timer went off.
If it did, let's tell the program that we can no longer drag, and tell the same to the user.
Now let's see if the input is a mouse_drag.
Everything from here on out will be inside the if.
See if it's where a drag can start. (In this example, a box starting at 5,5 and ending at 15,10)
And finially let's put in code for when drag==true.
All assembled, that would be:
Hopefully, you learned something.
If you use this knowledge in any way, I ask that you (not require) post what you made in my topic. I love seeing creativity in action!
colorOptions = {colors.red, colors.white, colors.blue, colors.green, colors.orange}
function dPixed(x,y)
local lastX, lastY = term.getCursorPos()
term.setBackgroundColor(colorOptions[math.random(1,#colorOptions])
term.setCursorPos(x,y)
write(" ")
term.setCursorPos(lastX,lastY)
end
while true do
type, btn, x, y = os.pullEvent("mouse_click")
dPixel(x,y)
end
If you didn't get that, then here's an explanation.
Spoiler
When you click, draw a randomly-colored pixel where I clicked.It will be either red, white, blue, green, or orange.
It will last until you ctrl-t terminate it or break the computer.
As you may know, you can use os.startTimer(paramTime) to queue a timed event. What you may not know is: it returns a unique timer ID.
With this id and a little ingenuity, you can make it only call a function when the last timer is called. EX:
--CurrentTimer
cT = 0 --Init the var (so we don't crash)
--Let us draw text at mouse's last pos
lastX = 0
lastY = 0
while true do
type, v1, v2, v3 = os.pullEvent()
if (type=="timer" and v1==cT) then
term.setCursorPos(lastX,lastY)
print("X")
term.setCursorPos(0,0)
end
if (type=="mouse_click") then
cT = os.startTimer(2)
lastX = v2
lastY = v3
end
end
If you need an explanation:
Spoiler
It will draw an "x" at your mouse's last position IF you wait for 2 seconds.It will draw nothing if you click before the 2 seconds passes.
I hope you're following me, this is my first tutorial in awhile :P/>
Now, to make it a drag function.
Initialize the currentTimer as 0 so we don't get errors.
Initialize drag so we don't get errors.
cTimer = 0
drag = false
Let's make a function that runs when we perform a "proper drag"
function myDragFunc(x,y)
term.setCursorPos(x,y)
write("O")
end
Next, I'll start our loop
while true do
--In the loop
end
Get input
-- Event type, argument 1, argument 2, argument 3 = os.pullEvent()
type,v1,v2,v3 = os.pullEvent()
Let's see if the timer went off.
If it did, let's tell the program that we can no longer drag, and tell the same to the user.
if (type=="timer" and v1==cTimer) then
term.setCursorPos(1,1)
write("dragEnd")
drag=false
end
Now let's see if the input is a mouse_drag.
if (type=="mouse_drag") then
end
Everything from here on out will be inside the if.
See if it's where a drag can start. (In this example, a box starting at 5,5 and ending at 15,10)
if (v2>4 and v2<16 and v3>4 and v3<11) then
drag = true
cTimer = os.startTimer(1)
myDragFunc(v2,v3)
--Let's clear the "dragEnd" text
term.setCursorPos(1,1)
write(" ")
end
And finially let's put in code for when drag==true.
if (drag) then
cTimer = os.startTimer(1)
myDragFunc(v2,v3)
end
All assembled, that would be:
Spoiler
cTimer = 0
drag = false
function myDragFunc(x,y)
term.setCursorPos(x,y)
write("O")
end
while true do
-- Event type, argument 1, argument 2, argument 3 = os.pullEvent()
type,v1,v2,v3 = os.pullEvent()
if (type=="timer" and v1==cTimer) then
term.setCursorPos(1,1)
write("dragEnd")
drag=false
end
if (type=="mouse_drag") then
if (v2>4 and v2<16 and v3>4 and v3<11) then
drag = true
cTimer = os.startTimer(1)
myDragFunc(v2,v3)
--Let's clear the "dragEnd" text
term.setCursorPos(1,1)
write(" ")
end
if (drag) then
cTimer = os.startTimer(1)
myDragFunc(v2,v3)
end
end
end
Hopefully, you learned something.
If you use this knowledge in any way, I ask that you (not require) post what you made in my topic. I love seeing creativity in action!
