Data

[gordonramp]

I know this as a major topic and I'm probably not the best one to bring it up but I will anyway because everyone is going to have to look at it sooner or later. Josh has posted an input console and I'm sure it's not the only one. Now what to do with the data from that and other sources. Starting with simple solutions.. Is it possible to write to a text file and also read it using Lua from the LE. I come from DBPro and in that language it is. It's also possible to write to the Windows Registry. Then there's Xml, and .ini files or purpose built 3rd-parties like sqlite3. So has anyone been exploring this and come up with any simple examples of using Lua to write and read data for use in the LE?

[Canardia]

Reading/writing text and binary files seems very easy in LUA:

http://www.lua.org/pil/21.2.html

[VicToMeyeZR]

Does anyone know how to seach a file with Lua, to find specific fields or data?

[Niosop]

Pretty much the same as with any other language.

[VicToMeyeZR]

lol. ok then.

[Niosop]

If you give a more specific example we can give a more specific answer. How are the fields or data laid out? What are you searching for?

[VicToMeyeZR]

alrighty..

 

Well I am looking at using the cfg file for settings graphics for my game testing, instead of hard coding it into the start up file every time.

 

So I would have

 

[GraphicsSettings]

GraphicsWidth=

GraphicsHeight=

etc....

 

so I got

GameSettings=io.open("graphics.cfg")
.......

[gordonramp]

I added this Lua into the LE example1 and it runs with no errors but no text appears on the screen. Anyone have a clue as to why?

 

print(io.open("newinput", "w"))--write
print(io.open("newinput", "r"))--read
DrawText(newinput,0,10)--draw

 

Update:

Don't bother.. I get it.

[gordonramp]

Here is some example code which writes and reads data to and from a text file. Open the ScriptEditor in the LE.SDK folder and place this code in it. Run it and a text file (my.txt) will be created in the same folder. Then the code will read the text file and write the contents to the screen. Note: If the Output content is changed, then the previous content in the text file is overwritten.

 

--Register abstract path
RegisterAbstractPath("")

--Set graphics mode
if Graphics(1024,768)==0 then
Notify("Failed to set graphics mode.",1)
return
end

world=CreateWorld()
if world==nil then
Notify("Failed to initialize engine.",1)
return
end

gbuffer=CreateBuffer(GraphicsWidth(),GraphicsHeight(),1+2+4+8)

camera=CreateCamera()
camera:SetPosition(Vec3(0,0,-2))

light=CreateSpotLight(10)
light:SetRotation(Vec3(45,55,0))
light:SetPosition(Vec3(5,5,-5))

material=LoadMaterial("abstract::cobblestones.mat")

mesh=CreateCube()
mesh:Paint(material)

ground=CreateCube()
ground:SetScale(Vec3(10.0,1.0,10.0))
ground:SetPosition(Vec3(0.0,-2.0,0.0))
ground:Paint(material)

light=CreateDirectionalLight()
light:SetRotation(Vec3(45,45,45))

---------------------------------------------------------
--Create a text file and write data to it

io.output(io.open("my.txt","w"))
io.write("21")
io.close()

---------------------------------------------------------

while AppTerminate()==0 do

mesh:Turn(Vec3(AppSpeed()*0.5,AppSpeed()*0.5,AppSpeed()*0.5))

UpdateAppTime()
world:Update(AppSpeed())

SetBuffer(gbuffer)
world:Render()
SetBuffer(BackBuffer())
world:RenderLights(gbuffer)

----------------------------------------------------------
--Open the text file and write it's context to the screen

file = io.open("my.txt","r")
for line in file:lines() do
DrawText(line,0,20) 
end
file:close()

-----------------------------------------------------------

DrawText(UPS(),0,0)

Flip(0)
end