Attaching dxText to vehicle component

[FuriouZ]

Hello all!

I have question that how i can attach dxText to vehicle component

Example(guieditor)

If i move camera front of the car,then i get theese errors, otherwise debug doesn't show any errors, but text doesn't appear too

addEventHandler("onClientRender",root,
   function()
    local vehicle = getPedOccupiedVehicle(localPlayer)
    local getComponent = getVehicleComponents(vehicle)
       if ( vehicle ) then
           for k in pairs (getComponent) do
	        local vcpX, vcpY, vcpZ = getVehicleComponentPosition(vehicle, "bump_rear_dummy")
			local vcpSP,vcpSP = getScreenFromWorldPosition ( vcpX, vcpY, vcpZ )
		    if ( vcpSP and vcpSP ) then
				dxDrawLine(vcpSP,vcpSP,796, 547, 871, 472, tocolor(255, 255, 255, 255), 2, true)
                   dxDrawLine(vcpSP,vcpSP,871, 472, 1010, 473, tocolor(255, 255, 255, 255), 2, true)
                   dxDrawText(vcpSP,vcpSP,"Damage: 100%", 871, 449, 1010, 473, tocolor(255, 255, 255, 255), 1.00, "default-bold", "center", "center", false, false, true, false, false)
		    end
		end
    end
   end
)

Edited April 13, 2014 by Guest

[Gallardo9944]

Like this?

http://er-mta.net/screenshots/cloud/Scr ... _28_49.png

Get offset with vehicle matrix (don't forget to calculate bounding box too), use 3D line, draw simple text over the screen with getScreenFromWorldPosition.

[FuriouZ]

How i get the vehicle matrix ?

something like this ?

        local vehicle = getPedOccupiedVehicle(localPlayer) 
        local vehX, vehY, vehZ, vehLX, vehLY, vehLZ = getCameraMatrix (vehicle) 
        local vcpSP,vcpSP = getScreenFromWorldPosition ( vehX, vehY, vehZ, vehLX, vehLY, vehLZ ) 

[Gallardo9944]

function getPositionFromElementOffset(element,offX,offY,offZ) 
  local m = getElementMatrix ( element )  -- Get the matrix 
  local x = offX * m[1][1] + offY * m[2][1] + offZ * m[3][1] + m[4][1]  -- Apply transform 
  local y = offX * m[1][2] + offY * m[2][2] + offZ * m[3][2] + m[4][2] 
  local z = offX * m[1][3] + offY * m[2][3] + offZ * m[3][3] + m[4][3] 
  return x, y, z                               -- Return the transformed point 
end 

Get the offset which equals to minX and minY of vehicle's bounding box and draw a line between the element position and that point.

[Einheit-101]

This wont work with all components (like misc_c) and modified vehicles could make problems, too. getVehicleComponentPosition has issues and custom vehicles can cause a dummy misplacement. But the bumper should work.

[Gallardo9944]

why would you even want a custom component? If it's something like the roof / spoiler of the car, use the bounding box, it's rather precise. Of course you can get the component position, but some components might be missing for some cars.