Sprite position

[diedir]

Hello, me again.. i try to position a sprite created for head up display over a scene, but can't move the display where i want

here the code i used :

--Get the displays
local displays = GetDisplays()

--Create window
local window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[1])

--Create framebuffer
local framebuffer = CreateFramebuffer(window)

--Create world
local world = CreateWorld()

--env map
local specmap = LoadTexture("./Materials/Environment/Default/specular.dds")
local diffmap = LoadTexture("./Materials/Environment/Default/diffuse.dds")
world:SetEnvironmentMap(specmap, ENVIRONMENTMAP_BACKGROUND)
world:SetEnvironmentMap(specmap, ENVIRONMENTMAP_SPECULAR)
world:SetEnvironmentMap(diffmap, ENVIRONMENTMAP_DIFFUSE)

--[[load map
local mapname = "Maps/scene1.ultra"
local cl = CommandLine()
if type(cl["map"]) == "string" then mapname = cl["map"] end
local scene = LoadMap(world, mapname)
--]]

--Create light
local light = CreateBoxLight(world)
light:SetRange(-10, 10)
light:SetArea(15, 15)
light:SetRotation(45, 35, 0)
light:SetColor(2)

--Load a font
local font = LoadFont("Fonts/arial.ttf")
local fontsize = 36

-- Create sprite
local sprite = CreateSprite(world, font,"HEY YOU !",fontsize) 
sprite:SetColor(1, 1, 1, 1)
sprite:SetPosition(0,-50, 0)

-- Create a camera
local camera = CreateCamera(world,PROJECTION_PERSPECTIVE)
camera:SetClearColor(0.125)
camera:SetPosition(0, 5, 0)

--Create second camera
local cam2 = CreateCamera(world,PROJECTION_ORTHOGRAPHIC)
cam2:SetPosition(0, 0, 0)
cam2:SetClearMode(CLEAR_DEPTH)

--Camera controls to look around
require 'Components/Player/CameraControls'
camera:AddComponent(CameraControls)

--main loop
while not window:KeyDown(KEY_ESCAPE) do 
    world:Update()
    world:Render(framebuffer)
end

Thank you for helping

[reepblue]

You're not setting your cam2 or your sprite to a new render layer.

Not much of a Lua user, but try this.

--Get the displays
local displays = GetDisplays()

--Create window
local window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[1])

--Create framebuffer
local framebuffer = CreateFramebuffer(window)

--Create world
local world = CreateWorld()

--env map
local specmap = LoadTexture("./Materials/Environment/Default/specular.dds")
local diffmap = LoadTexture("./Materials/Environment/Default/diffuse.dds")
world:SetEnvironmentMap(specmap, ENVIRONMENTMAP_BACKGROUND)
world:SetEnvironmentMap(specmap, ENVIRONMENTMAP_SPECULAR)
world:SetEnvironmentMap(diffmap, ENVIRONMENTMAP_DIFFUSE)

--[[load map
local mapname = "Maps/scene1.ultra"
local cl = CommandLine()
if type(cl["map"]) == "string" then mapname = cl["map"] end
local scene = LoadMap(world, mapname)
--]]

--Create light
local light = CreateBoxLight(world)
light:SetRange(-10, 10)
light:SetArea(15, 15)
light:SetRotation(45, 35, 0)
light:SetColor(2)

--Load a font
local font = LoadFont("Fonts/arial.ttf")
local fontsize = 36


-- Create a camera
local camera = CreateCamera(world,PROJECTION_PERSPECTIVE)
camera:SetClearColor(0.125)
camera:SetPosition(0, 5, 0)

--Create second camera
local cam2 = CreateCamera(world,PROJECTION_ORTHOGRAPHIC)
cam2:SetPosition(0, 0, 0)
cam2:SetClearMode(CLEAR_DEPTH)
cam2:SetRenderLayers(1)

-- Create sprite
local sprite = CreateSprite(world, font,"HEY YOU !",fontsize) 
sprite:SetColor(1, 1, 1, 1)
sprite:SetPosition(0, 0, 0)
sprite:SetRenderLayers(1)

--Camera controls to look around
require 'Components/Player/CameraControls'
camera:AddComponent(CameraControls)

--main loop
while not window:KeyDown(KEY_ESCAPE) do 
    world:Update()
    world:Render(framebuffer)
end

This should spawn the sprite in the center of the screen.

[diedir]

Well thank you for your time but the sprite was already in the center of the window,

the problem is that i can't place it where i wanted (eg: at top left or top right... etc)

still searching

 

[reepblue]

Move the camera to the bottom edge of the framebuffer. 0,0 should be the top left of the screen. Then you can use the size of the framebuffer to position the sprite wherever you want like if you were using the Interface class. 

local size = framebuffer:GetSize()
cam2:SetPosition(size.x * 0.5, size.y * 0.5f)

 

[diedir]

Ok i got it,

simply by positionning the sprite in 2D coords like -400,300

x negative on the left side, x positve on the right and y positive on top side and negative in the bottom

0,0 is the center of the window

thank you Reepblue