getGroundPosition

[iwalidza]

some places getGroundPosition not work well how i can fix it

[The_GTA]

Hello iwalidza,

• it could be that the position does not have their collision loaded yet, thus not allowing a ground-position query to function. In that case you should move the camera close to your point of request, wait for a frame until the game has loaded the surrounding area and then use that request in further code.
• there are area on the map of which the ground position might not be of interest. In that case you could try checking against the water-surface instead or try to query the position of a possibly-defined roof.

[iwalidza]

8 minutes ago, The_GTA said:

Hello iwalidza,

• it could be that the position does not have their collision loaded yet, thus not allowing a ground-position query to function. In that case you should move the camera close to your point of request, wait for a frame until the game has loaded the surrounding area and then use that request in further code.
• there are area on the map of which the ground position might not be of interest. In that case you could try checking against the water-surface instead or try to query the position of a possibly-defined roof.

I don't know how I can use it I think the area not be of interest 

[The_GTA]

Can you show us the script that has to be fixed?

[iwalidza]

2 hours ago, The_GTA said:

Can you show us the script that has to be fixed?

local sw, sh = guiGetScreenSize ()
local isEnable = false
local oneTick = false
local currentIndex = 1
local levelVar = 0
setDevelopmentMode(true)

local loadList = {
    {9990,"foundation"},
    {9991,"door"},
    {9992,"floor"},
    {9993,"stair"},
    {9994,"wall"},
    {9995,"walldoor"},
    {9996,"wallwindow"},
}

function findRotation( x1, y1, x2, y2 ) 
    local t = -math.deg( math.atan2( x2 - x1, y2 - y1 ) )
    return t < 0 and t + 360 or t
end

function onStart()
    
    for i = 1 ,#loadList do
        col_floors = engineLoadCOL ( "models/"..loadList[i][2]..".col" )
        engineReplaceCOL ( col_floors, loadList[i][1] )
        txd_floors = engineLoadTXD ( "models/texture.txd" )
        engineImportTXD ( txd_floors, loadList[i][1] )
        dff_floors = engineLoadDFF ( "models/"..loadList[i][2]..".dff" )
        engineReplaceModel ( dff_floors, loadList[i][1] )
    end
    
    editMode = dxCreateShader('shader.fx', 0, 0, false, 'object') 
    local r, g, b, a = 19, 70, 209,200
    dxSetShaderValue ( editMode, "gRedColor", r/255 )
    dxSetShaderValue ( editMode, "gGrnColor", g/255 )
    dxSetShaderValue ( editMode, "gBluColor", b/255 )
    dxSetShaderValue ( editMode, "gAlpha", a/255 )

end
addEventHandler("onClientResourceStart", resourceRoot, onStart)

function BuildingEditCreate (x,y,z)
    local player = getLocalPlayer()
    local matrix = player.matrix
    editObject = createObject(9990 ,player.matrix.position + player.matrix.forward * 2,0,0,0,true)
    engineApplyShaderToWorldTexture(editMode,'*',editObject)
end

function enableEdit ()
    isEnable = not isEnable
    oneTick = true
end
bindKey("E","down",enableEdit)

function BuildingStartEdit ()
    if not isEnable then 
        if oneTick then
            destroyElement(editObject)
            oneTick = false
        end
        return end    
    tx, ty, tz = getWorldFromScreenPosition ( (sw / 2) - 3,(sh / 2) - 100, 15 )
    px, py, pz = getCameraMatrix()
    
    if oneTick then
        local hit, faceX, faceY, faceZ, elementHit = processLineOfSight ( tx, ty, tz, px, py, pz,true ,true ,true ,true ,true ,false ,false ,false)
        BuildingEditCreate (faceX, faceY, faceZ)
        oneTick = false
    end
    
    local overGround = getGroundPosition(getElementPosition(editObject))
    hit, faceX, faceY, faceZ, elementHit = processLineOfSight ( tx, ty, tz, px, py, pz,true ,false ,false ,false ,false ,false ,false ,false , editObject)
    if faceX == nil or faceY == nil then
        faceX = faceX or tx 
        faceY = faceY or ty
    end
    xO,yO,yZ = getElementPosition(editObject)
    xC,yC = getElementPosition(localPlayer)

    if yZ < 1.5 then
        print("lower")
        setElementPosition(editObject,faceX, faceY, (overGround + 1) + levelVar)
    end

    setElementPosition(editObject,faceX, faceY, (overGround + 1) + levelVar)
    setElementRotation(editObject,0,0,findRotation(xO,yO,xC,yC) + currentIndex)

    --Debug
    dxDrawText('Object Position:',10,300)
    dxDrawText('X: '..xO,100,320)
    dxDrawText('Y: '..yO,100,340)
    dxDrawText('Z: '..yZ,100,360)
end


addEventHandler("onClientRender",root,function()
    BuildingStartEdit ()
end);

bindKey("pgup","down",function()
    if levelVar > 1 then return end
    levelVar = levelVar + 0.10
end)

bindKey("pgdn","down",function()
    if levelVar < 0 then return end
    levelVar = levelVar - 0.10
end)

function increaseIndex() 
    currentIndex = currentIndex + 10
end 
bindKey("mouse_wheel_up","down",increaseIndex) 
      
function decreseIndex() 
    currentIndex = currentIndex - 10
end 
bindKey("mouse_wheel_down","down",decreseIndex) 

 

[The_GTA]

Have you considered that the getGroundPosition function does return the highest z-coordinate below the coordinate that you pass to it? You could run into a problem, for instance, if your editObject's position is below all the GTA SA game collision.

What do you mean about "working well", by the way? Am I wrong to assume that you are experiencing getGroundPosition returning false? Or are you dissatisfied about the quality of the function result?

[iwalidza]

26 minutes ago, The_GTA said:

Have you considered that the getGroundPosition function does return the highest z-coordinate below the coordinate that you pass to it? You could run into a problem, for instance, if your editObject's position is below all the GTA SA game collision.

What do you mean about "working well", by the way? Am I wrong to assume that you are experiencing getGroundPosition returning false? Or are you dissatisfied about the quality of the function result?

getGroundPosition return 0 
i wiki that mean '0 if the point you tried to test is outside the loaded world map'
how i can fix it

 

[iwalidza]

1 hour ago, The_GTA said:

Have you considered that the getGroundPosition function does return the highest z-coordinate below the coordinate that you pass to it? You could run into a problem, for instance, if your editObject's position is below all the GTA SA game collision.

What do you mean about "working well", by the way? Am I wrong to assume that you are experiencing getGroundPosition returning false? Or are you dissatisfied about the quality of the function result?

error: NaN

[The_GTA]

3 hours ago, iwalidza said:

how i can fix it

Move the world camera for a few frames until loaded, as explained by me above.

Given the details you have provided, I unfortunately cannot help you with that NaN inquiry. It sounds very unordinary.

[iwalidza]

On 12/01/2022 at 02:06, The_GTA said:

Move the world camera for a few frames until loaded, as explained by me above.

Given the details you have provided, I unfortunately cannot help you with that NaN inquiry. It sounds very unordinary.

how i can get ground position with this in server side