Vectors to velocity

im having some difficulties making a certian phrase in my script work just right...
and i am currently getting a syntax error between pox and .x in the first phrase
im trying to say:

vector pos.x = llGetVel;

V
O
I rest of a vehicle script
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if(level & CONTROL_FWD)
{
gLinearMotor = (pos.x + <10,0,0>;
if ( pos.x > (<0,0,0> && pos.x < (<15,0,0>) {pos.x =10;}

if ( pos.x > (<16,0,0> && pos.x < (<25,0,0>) {pos.x =20;}

if ( pos.x > (<26,0,0> && pos.x < (<35,0,0>) {pos.x =30;}

if ( pos.x > (<36,0,0> && pos.x < (<45,0,0>) {pos.x =40;}

if ( pos.x > (<46,0,0> && pos.x < (<55,0,0>) {pos.x =50;}

key_control = TRUE;
}
if(level & CONTROL_BACK)

the point is to have the control set so that whenyou hti forward you move forward on the x axis at a constant velocity of 10, which increases each time you hit forward, im pretty new at scripting... and am geting bogged down tryign to get this to work. any suggestions?

thats because llGetVel returns a global vector.

http://secondlife.com/badgeo/wakka.php?wakka=llGetVel

I don't know much about getting the rest of your script going but that first line of code is getting a syntax error for a couple reasons:

vector pos.x = llGetVel;

1. you can't operate on the .x .y or .z of a vector til you declare it:

vector pos;
pos.x = ...something...

2. llGetVel() needs an empty set of parenthesis after it for it to work:

vector velocity = llGetVel();

Now that that is fixed... llGetVel() returns a vector, which will cause a type mismatch error, because pos.x wants a float data type. you might find the wiki helpful if you haven't checked it out.

Cheers,
JL

ive checked out the wiki and done a good many of things ive tried out what you two have stated and i still seem to be lacking something

Perhaps I am looking all wrong at this script, but

If pos.x is a vector, shouldn't the line read :

if ( pos.x > (<0,0,0> && pos.x < (<15,0,0>) {pos.x =<10,0,0>;} ???

Because pos.x is a vector.

pos.x is a float, pos is a vector.
==Chris

Yup, a vector is simply a set of three floats.
If you want to have slightly structured data, you can use vectors and rots as raw storage.
It comes in handy sometimes.

//put this part in global variable declaration
vector movement = ZERO_VECTOR;


if(level & CONTROL_FWD) 
{ 
movement.x += 10;
// key_control = TRUE;  
//  since the control event is only started if a control key is pressed,
//  this variable isn't really neccesary.
} 

You might also want to make a piece of code that makes the vehicle decelerate faster at high speeds.

As for getting it to, ehm... do what you want.

vector forward = llGetRot() / <10,0,0>; //Returns forward on your X axis
vector current_vel = llGetVel(); //Returns current velocity vector

//Now, to get how fast we're going on X, we split up the vector

//Example

if(current_vel.x > forward.x && current_vel.y > forward.y && current_vel.z > forward.z)
//If all this checks out, we must be going faster than 10m on the X-axis.
llSay(0,"Moving faster than 10m");

//Alternately, you can then multiply your forward vector to get speeds equivalent to 20m, 30m, 55m, etc.
//However, one thing I prefer using is llVecMag, to cut off total velocity at a given number
//See here: http://secondlife.com/badgeo/wakka.php?wakka=llVecMag

I find, though, that a total velocity constant is more effective than simply one that works on a single axis, but it's your call.

Also:

Incorrect. pos.x, pos.y, and pos.z would all have been declared the moment you declare a vector. You can also set a vector to an initial value directly via vector pos = <0,0,0>;


Unfortunately, this won't do a thing unless you have a vehicle motor set. If Leffe is using vehicle code, that might be different.

well... i got it working with the help of jimmy loveless he spent a great deal of time looking overe every thing i apreciate the help.