*Adaptive Cruise Control* Help please

[jkub]

I have made a cruise control script a long time ago and I was working to upgrade it today to be able to process lines of sight in front of it to be able to adjust speed to not hit anything.

I understand it would be tactical to use processLineOfSight or isLineOfSightClear but the problem with that is I don't know how to calculate distance in front of a vehicle to get the end points.

My major weakness is applying advanced math (I barely even know) and trigonometric functions in order to calculate space in front of the vehicle.

Here is some code.

function cruiseOn() 
    if isPedInVehicle ( getLocalPlayer() ) then 
        if getVehicleController ( getPedOccupiedVehicle ( getLocalPlayer() ) ) == getLocalPlayer() then 
            local vehX, vehY, vehZ = getElementVelocity ( getPedOccupiedVehicle ( getLocalPlayer() ) ) 
            local vx, vy, vz = getElementPosition ( getPedOccupiedVehicle ( getLocalPlayer() ) ) 
            local vrot, vrot, vrot = getVehicleRotation ( getPedOccupiedVehicle ( getLocalPlayer() ) ) 
            local realSpeed = ( vehX^2 + vehY^2 + vehZ^2 ) ^ ( 0.5 ) 
            local sX, sY = guiGetScreenSize() 
            local pX, pY = guiGetPosition ( panel, false ) 
            local sizeX, sizeY = guiGetSize ( panel, false ) 
            ---- 
            dxDrawImage ( pX, pY, sizeX, sizeY, "images/cruiseOn.png", 0, 0, 0, tocolor ( 255, 255, 255, 255 ), true  )  
            --dxDrawLine3D ( vx, vy, vz, endx, endy, endz, tocolor ( 255, 0, 0, 100 ), 4, true, 0 ) 
            if realSpeed < cruise_Speed then 
                setControlState ( "accelerate", true ) 
            else 
                setControlState ( "accelerate", false ) 
            end 
        end 
    else 
        removeEventHandler ( "onClientRender", getRootElement(), cruiseOn ) 
        cruise = nil 
        cruise_Speed = nil 
        setControlState ( "accelerate", false ) 
        if cruise == nil then 
            cruiseControlStatus = nil 
        end 
    end 
end 

[dzek (varez)]

function getPositionRelatedToVehicle(theVeh, meters) 
    local xx, yy, zz = getElementPosition(theVeh) 
    local rx, ry, rot = getElementRotation(theVeh) 
    local lx = xx + math.sin (math.rad(-rot)) * meters 
    local ly = yy + math.cos (math.rad(-rot)) * meters 
    return lx,ly 
end  

notice this will fail when car is driving uphill (rotated) - point will be underground, and isLineOfSightClear will fail.

this is best thing i can give you anyway

[jkub]

Thanks greatly varez

Aside from the z problem I can't currently seem to get to the mta wiki for the arguments for lineOfSightClear and the others.

Ill try this out.

[jkub]

I have a couple more problems lol.

1. It does not detect vehicles

2. Whenever the ray does detect an obstruction in the way, after deaccelerating and braking, I cannot disengage the brake...

I used setControlState to disable the accel and enable the brake when something is detected but everytime after stopped, I have to manually press the brake or handbrake to release it. I have had this problem setControlState before.

[dzek (varez)]

post current script..