3D Text Attached On Elements

[xXMADEXx]

Hello guys, i've created my this script, but i have one problem. When im flying in superman, i can see the text ( Which is what i want) but, when im on the ground, my name will go away....

Heres what i mean:

http://imageshack.us/a/img405/7652/mtas ... 232608.png

http://imageshack.us/photo/my-images/23 ... 32605.png/

Code:

drawData = { } 
  
function createHeadText ( text, element, r, g, b )  
    if ( text and element and r and g and b ) then 
        table.insert ( drawData, { text, element, r, g, b } ) 
    end 
end 
addCommandHandler ( "track", function ( cmd, who ) 
    createHeadText ( who, getPlayerFromName ( who ), 255, 0, 255 ) 
end ) 
  
------------------ 
-- According to this, it says it sould be loading 
------------------ 
addCommandHandler ( "viewtb", function ( ) 
    local amount = tonumber ( #drawData ) 
    outputChatBox ( tostring ( amount ) ) 
    if ( amount > 0 ) then 
        for i, v in ipairs ( drawData ) do 
            local text, element, r, g, b = unpack ( drawData [ i ] ) 
            outputChatBox ( tostring ( i )..": Text: "..text, r, g, b ) 
        end 
    end 
end ) 
  
addEventHandler ( "onClientRender", root, function ( ) 
    for i, v in ipairs ( drawData ) do 
        local text, element, r, g, b = unpack ( drawData [ i ] ) 
        local x, y, z = getElementPosition ( localPlayer ) 
        local tX, tY, tZ = getElementPosition ( element ) 
        local dist = getDistanceBetweenPoints3D ( x, y, z, tX, tY, tZ ) 
        local defdd = 5 -- Note: I have attempted changing this, but didn't do anything 
        if ( dist < defdd ) then 
             local scx, scy = getScreenFromWorldPosition ( tX, tY, tZ + 1) 
             if ( isLineOfSightClear ( x, y, z, tX, tY, tZ ) ) then 
                local scale = 2 * ( ( defdd - dist ) / defdd ) 
                dxDrawText ( text, scx, scy, scx, scy, tocolor ( r, g, b, 255 ), scale, "default-bold", "center", "center", false, false, false ) 
             end 
        end 
    end 
end ) 
  

[50p]

Instead of getting distance between localPlayer and the element, check the distance between camera and element position.

Also, the line of sight, you're checking if the line of sight is clear but you're not disabling the peds collision detection, so this will fail.

[xXMADEXx]

Okey... I tried doing what you said with the camera, and I got this:

addEventHandler ( "onClientRender", root, function ( ) 
    for i, v in ipairs ( drawData ) do 
        local text, element, r, g, b = unpack ( drawData [ i ] ) 
        local x, y, z = getElementPosition ( localPlayer ) 
        local tX, tY, tZ, lx, ly, lz, _, _ = getCameraMatrix( ) 
        local dist = getDistanceBetweenPoints3D ( x, y, z, tX, tY, tZ ) 
        local defdd = 5 
        if ( dist < defdd ) then 
             local scx, scy = getScreenFromWorldPosition ( tX, tY, tZ ) 
             if ( isLineOfSightClear ( x, y, z, tX, tY, tZ ) ) then 
                local scale = 2 * ( ( defdd - dist ) / defdd ) 
                dxDrawText ( text, scx, scy, scx, scy, tocolor ( r, g, b, 255 ), scale, "default-bold", "center", "center", false, false, false ) 
             end 
        end 
    end 
end ) 

but for some reason "scx" is returning a boolean.

[IIYAMA]

Sometimes it returns false, don't know why.

  
if scx then --< 
  

[50p]

What do you mean you don't know why? xXMADEXx, you're trying to get point on screen of camera's position. Camera position is at the position of the screen. onClientRender gets triggered after all elements' position get updated and other GTA stuff get renered, so there may be some "delay" if you want to draw something or update position of the camera. I'll now explain why it returns false SOMETIMES.

An example:

addEventHandler( "onClientRender", root, 
    function( ) 
        local x,y,z = getElementPosition( localPlayer ); 
        setCameraMatrix( x,y,z+15,  x,y,z ); 
    end 
); 

Try this script yourself. It's a simple old school top-down GTA camera. When you're moving the camera will follow, the problem is that the faster you move the more "shaky" the camera will be (test it to see what I mean) but if you'll use onClientPreRender then camera will be smooth just like you'd expect it to be. The reason is that onClientPreRender is triggered right after the GTA positions are updated and before all the world rendering. The reason why you get false sometimes is because the camera position gets updated and after all other rendering stuff you get camera's position (GTA:SA processing order). I'm pretty sure it will return false if the camera is not moving at all, am I correct? It's difficult to explain it for me in detail but I hope you get the idea.

So, I suggest you get screen position of the element that you want to draw the text for. Currently your code would render all the text in the middle of the screen only when scx will not return false. Read the line 4, is that where you want to draw all the text? At the position of local player or element from drawData table?

[IIYAMA]

Short: So I am trying to get the camera position, but it is nil/false because it hasn't been updated?

[50p]

Short: get position of element on screen instead of camera position on the screen.

Ask yourself: why do I get camera position on my screen and how is that even possible?