Text on the screen

[zack57]

I am new to Lua, I am trying to learn Lua but I can's seem to get the text to show on the screen. Josh send me this link

 

http://www.leadwerks.com/werkspace/page/api-reference/_/context/contextdrawtext-r731 .

 

I have tried to put it in main.lua, tried to create text.lua, I tried to put it in a child of the player as a pivot but nothing shows up. I am trying to learn lua show I need to see the test to know I did it if you know what I mean?

[Genebris]

You should do it in Script:PostRender function, look how default player interface is drawn.

[zack57]

I did put this in a text.lua and the put the pivot for the text.lua and put the pivot as a child of the fpsplayer. The in the text.lua I see Script: PostRender I hope this is what you mean?

 

-This function will be called after the world is rendered, before the screen is refreshed.

--Use this to perform any 2D drawing you want the entity to display.

function Script:PostRender(context)

 

function App:Start()

 

self.window = Window:Create()

self.context = Context:Create(self.window)

local font = Font:Load("Fonts/Arial.ttf",36)

self.context:SetFont(font)

font:Release()

return true

end

 

function App:Loop()

 

if (self.window:Closed() or self.window:KeyDown(Key.Escape)) then return false end

 

self.context:SetColor(0,0,0)

self.context:Clear()

 

--Draw some centered text on the screen

local text = "Leadwerks"

 

local font = self.context:GetFont()

 

local x = self.window:GetWidth()/2

local y = self.window:GetHeight()/2

 

x = x - font:GetTextWidth(text)/2

y = y - font:GetHeight()/2

 

self.context:SetBlendMode(Blend.Alpha)

self.context:SetColor(1,1,1)

self.context:DrawText(text,x,y)

self.context:SetBlendMode(Blend.Solid)

 

self.context:Sync()

return true

end

 

end

[extenz]

function Script:PostRender(context)
 context:SetBlendMode(Blend.Alpha)
 context:DrawText("Leadwerks", 20, 20)
end

 

 

That's pretty much all you need

[zack57]

I must be missing something I did try that extenz but I can't seem to see anything. when I run it the frist time I got an error then I run it again and I got no error.

[macklebee]

Why do you have the App:Start() and App:Loop() functions inside your Script:PostRender() function? The App functions and App.lua script are deprecated but can still be used as your main script. I personally prefer just using the Main.lua script as it is more straight forward to use. The Script:PostRender() is to be used in an entity script not the main program script.

[zack57]

Ok I tryed that as well no text comes on the sceen?

 

main.lua

 

function App:Start()

 

self.window = Window:Create()

self.context = Context:Create(self.window)

local font = Font:Load("Fonts/Arial.ttf",36)

self.context:SetFont(font)

font:Release()

return true

end

 

function App:Loop()

 

if (self.window:Closed() or self.window:KeyDown(Key.Escape)) then return false end

 

self.context:SetColor(0,0,0)

self.context:Clear()

 

--Draw some centered text on the screen

local text = "Leadwerks"

 

local font = self.context:GetFont()

 

local x = self.window:GetWidth()/2

local y = self.window:GetHeight()/2

 

x = x - font:GetTextWidth(text)/2

y = y - font:GetHeight()/2

 

self.context:SetBlendMode(Blend.Alpha)

self.context:SetColor(1,1,1)

self.context:DrawText(text,x,y)

self.context:SetBlendMode(Blend.Solid)

 

self.context:Sync()

return true

end

 

--Initialize Steamworks (optional)

Steamworks:Initialize()

 

--Initialize analytics (optional). Create an account at www.gameamalytics.com to get your game keys

--[[if DEBUG==false then

Analytics:SetKeys("GAME_KEY_xxxxxxxxx", "SECRET_KEY_xxxxxxxxx")

Analytics:Enable()

end]]

 

--Set the application title

title="Training_For_Life"

 

--Create a window

local windowstyle = window.Titlebar

if System:GetProperty("fullscreen")=="1" then windowstyle=windowstyle+window.FullScreen end

window=Window:Create(title,0,0,System:GetProperty("screenwidth","1024"),System:GetProperty("screenheight","768"),windowstyle)

window:HideMouse()

 

--Create the graphics context

context=Context:Create(window,0)

if context==nil then return end

 

--Create a world

world=World:Create()

world:SetLightQuality((System:GetProperty("lightquality","1")))

 

--Load a map

local mapfile = System:GetProperty("map","Maps/start.map")

if Map:Load(mapfile)==false then return end

prevmapname = FileSystem:StripAll(changemapname)

 

--Send analytics event

Analytics:SendProgressEvent("Start",prevmapname)

 

while window:KeyDown(Key.Escape)==false do

 

--If window has been closed, end the program

if window:Closed() then break end

 

--Handle map change

if changemapname~=nil then

 

--Pause the clock

Time:Pause()

 

--Pause garbage collection

System:GCSuspend()

 

--Clear all entities

world:Clear()

 

--Send analytics event

Analytics:SendProgressEvent("Complete",prevmapname)

 

--Load the next map

if Map:Load("Maps/"..changemapname..".map")==false then return end

prevmapname = changemapname

 

--Send analytics event

Analytics:SendProgressEvent("Start",prevmapname)

 

--Resume garbage collection

System:GCResume()

 

--Resume the clock

Time:Resume()

 

changemapname = nil

end

 

--Update the app timing

Time:Update()

 

--Update the world

world:Update()

 

--Render the world

world:Render()

 

--Render statistics

context:SetBlendMode(Blend.Alpha)

if DEBUG then

context:SetColor(1,0,0,1)

context:DrawText("Debug Mode",2,2)

context:SetColor(1,1,1,1)

context:DrawStats(2,22)

context:SetBlendMode(Blend.Solid)

else

--Toggle statistics on and off

if (window:KeyHit(Key.F11)) then showstats = not showstats end

if showstats then

context:SetColor(1,1,1,1)

context:DrawText("FPS: "..Math:Round(Time:UPS()),2,2)

end

end

 

--Refresh the screen

context:Sync(true)

 

end

[Thirsty Panther]

Here is a simple map with a camera, a box, a light and a pivot.

 

The pivot has a script attached called "Text on Screen". This script will put the text on the screen for you without having to worry about the Main.lua script.

 

Map

[Genebris]

You didn't include the script.

 

zack57, use default scripts, they have all examples you need.

[Thirsty Panther]

Text On Screen Lua.

 

Attach this script to the pivot in the map above.

[zack57]

Thanks for all the help guys!