Spawning a ramp in front of vehicle

[Guest]

Hi. I'd like to write script, which will create ramps in front of my car and after some seconds delete it, but It's not easy for me to create that script (I'm LUA newbie ).

I'm not asking You to make this script for me, I'm asking You for solutions how to do it. I think I should check vehicle's position and rotation, but I'm not sure what to do later...

Sorry for my bad english. I hope You will help me

[rjcnz333]

Later you need to createObject, and destroyElement (your object) after some seconds.

[ratoc]

local x, y, z = getElementPosition(player) 
local a = getPlayerRotation(player) 
  
x += (10 * math.sin(-a)) 
y += (10 * math.cos(-a)) 
  
createObject (modelid, x, y, z, 0, 0, a) 

^ you can create an object in front of the player with this code

[Guest]

Thank You very much :)I've got one more question...How can I make my script "sleep" for 50ms. ?

@down

OK, thx

Edited January 7, 2008 by Guest

[ratoc]

you should create a timer..

[Guest]

x += (10 * math.sin(-a)) 
y += (10 * math.cos(-a)) 

=

SCRIPT ERROR: ...ramp.lua:5: '=' expected near '+' 

What does "x +=" mean? How can I fix this error?

[[email protected]]

function spawnRamp( thePlayer ) 
     local x, y, z = getElementPosition(player) 
     local a = getPlayerRotation(player) 
   
     x2 = (10 * math.sin(-a)) 
     y2 = (10 * math.cos(-a)) 
   
     local ramp = createObject (3593, x2, y2, z, 0, 0, a) 
     [color=#FF0000]setTimer ( removeRamp, 3000, 1, [b]ramp[/b] )[/color] 
   
  
 end 
   
  
[color=#FF0000]function removeRamp ( [b]rampObj[/b] )[/color] 
[color=#FF0000]     destroyElement(rampObj)[/color] 
[color=#FF0000] end[/color] 
 bindKey ( thePlayer, "c", "down", spawnRamp )  

You should have scripted it like above:

2 functions: 1 spawns the ramp, 1 destroys the ramp.

1 timer: inside the spawnfunction, that will trigger the destroy function when it expires.

EDIT: text in red is changed code, but noticed previous post got deleted, I also didn't verify whether your code really does what it is supposed to do, just the correct use of the 2 functions and the timer

Edited January 7, 2008 by Guest

[lil Toady]

unfortunatly '+=' wont work in lua.

i'd do something like that

function createRamp ( player, command ) 
    local x, y, z = getElementPosition ( player ) 
    local r = getPlayerRotation ( player ) 
    x = x - math.sin ( math.rad ( r ) ) * 5 
    y = y + math.cos ( math.rad ( r ) ) * 5 
    createObject ( 1655, x, y, z, 0, 0, r ) 
end 
addCommandHandler ( "ramp", createRamp ) 

[rjcnz333]

Ok, and why so difficult? Just

function createRamp ( player, command ) 
    local x, y, z = getElementPosition ( player ) 
    local r = getPlayerRotation ( player ) 
    x = x + math.cos(r) * 10 
    y = y + math.sin(r) * 10 
    createObject ( 1655, x, y, z, 0, 0, -r ) 
end 
addCommandHandler ( "ramp", createRamp ) 

Damn. Something goes wrong in my script(

Edited January 7, 2008 by Guest

[Guest]

Thanks.

The last question: How can I remove ramp?

[rjcnz333]

GetPlayerRotation doesn't work when player is in a vehicle. We need something else.

[Guest]

function createRamp ( player, command ) 
    local x, y, z = getElementPosition ( player ) 
    local r = getPlayerRotation ( player ) 
    x = x - math.sin ( math.rad ( r ) ) * 20 
    y = y + math.cos ( math.rad ( r ) ) * 20 
    createObject ( 1655, x, y, z, 0, 0, r ) 
    setTimer ( RemoveRamp, 10000, 1 ) 
end 
addCommandHandler ( "ramp", createRamp ) 
  
function RemoveRamp () 
        outputChatBox ( "Blablabla", thePlayer ) 
end 
  

It DOES work, when player is in vehicle

[rjcnz333]

I have tried it. It works only when I'm not in a vehicle. When I'm in a vehicle, it spawns ramps with the static rotation, and it depends on the rotation what I have, when I entered the car. So, if I turn, and then spawn the ramp, I can't jump, because the rotation is wrong.

This script is fully working:

ffunction createRamp ( player, command ) 
    local x, y, z = getElementPosition ( player ) 
    local theVehicle = getPlayerOccupiedVehicle ( player ) 
    local a,b,r = getVehicleRotation ( theVehicle ) 
    x = x - math.sin ( math.rad(r) ) * 20 
    y = y + math.cos ( math.rad(r) ) * 20 
    ramp = createObject ( 1655, x, y, z, 0, 0, r ) 
    setTimer ( RemoveRamp, 8000, 1 ) 
end 
function RemoveRamp () 
        destroyElement(ramp) 
end 
addCommandHandler ( "r", createRamp ) 

[Guest]

Thank You, but there is little problem... The ramp spawns, but when You will spawn more than 1 ramps (type quickly /ramp twice), two ramps will apear, but only one will disapear. I wrote this:

function createRamp ( player, command ) 
    local x, y, z = getElementPosition ( player ) 
    local theVehicle = getPlayerOccupiedVehicle ( player ) 
    local a,b,r = getVehicleRotation ( theVehicle ) 
    if ( spawned == yes ) then 
        x = x - math.sin ( math.rad(r) ) * 20 
        y = y + math.cos ( math.rad(r) ) * 20 
        ramp = createObject ( 1655, x, y, z, 0, 0, r ) 
        spawned = yes 
        setTimer ( RemoveRamp, 8000, 1 ) 
        setTimer ( setClock, 8000, 1 ) 
    end 
    if (spawned == no) then 
        outputChatBox("Wait, please...", thePlayer) 
    end 
  
end 
  
function setClock () 
    spawned = no 
end 
  
  
  
function RemoveRamp () 
    destroyElement(ramp) 
end 
addCommandHandler ( "ramp", createRamp ) 

But it doesn't work

[[email protected]]

You can do it with much less difficulty:

You had:

  
ramp = createObject ( 1655, x, y, z, 0, 0, r ) 
... 
setTimer ( RemoveRamp, 8000, 1 ) 
  

just add the ramp as argument to that timer:

setTimer ( RemoveRamp, 8000, 1, ramp ) 

This way it will function as if ramp was an argument of the functioncall, usually written as:

RemoveRamp( ramp )

[Guest]

Thank You It works very good now!

function createRamp ( player, command ) 
    local x, y, z = getElementPosition ( player ) 
    local theVehicle = getPlayerOccupiedVehicle ( player ) 
    local a,b,r = getVehicleRotation ( theVehicle ) 
    x = x - math.sin ( math.rad(r) ) * 20 
    y = y + math.cos ( math.rad(r) ) * 20 
    ramp = createObject ( 1655, x, y, z, 0, 0, r ) 
    setTimer ( RemoveRamp, 8000, 1, ramp ) 
    end 
end 
  
function RemoveRamp (ramp) 
    destroyElement(ramp) 
end 
addCommandHandler ( "ramp", createRamp ) 

[rjcnz333]

What about binds? When I have tried to bind C on ramp, my client crashed.

[Guest]

function createRamp ( source, key, keyState ) 
    local x, y, z = getElementPosition ( source ) 
    local theVehicle = getPlayerOccupiedVehicle ( source ) 
    local a,b,r = getVehicleRotation ( theVehicle ) 
    x = x - math.sin ( math.rad(r) ) * 20 
    y = y + math.cos ( math.rad(r) ) * 20 
    ramp = createObject ( 1655, x, y, z, 0, 0, r ) 
    setTimer ( RemoveRamp, 8000, 1, ramp ) 
end 
function RemoveRamp (ramp) 
    destroyElement(ramp) 
end 
  
  
function bindTheKeys ( source ) 
    bindKey ( source, "c", "down", createRamp ) 
    outputChatBox( "Press 'c' to spawn ramp (you must be in any vehicle)",thePlayer )    
end 
addCommandHandler ( "ramp", bindTheKeys ) 

I'm using this one and it works very good

You need to type /ramp to activate ramps. To spawn ramp in front of You, press C.

[norby89]

you could also use setElementVelocity to get the same effect, or why not, make the vehicle jump even higher