Rezzing obects - rotation adjustment

On Scripters Support Group today someone asked about adjusting for rotation when rezzing objects.

You can use llRot2Fwd, llRot2Up and llRot2Left to adjust.

For example:

llRezAtRoot(llGetInventoryName(INVENTORY_OBJECT,0), llGetPos()-llRot2Fwd(llGetRot())+llRot2Left(llGetRot()),llGetVel(),llGetRot(),llGetStartParamater());

Would (with not a lot of efficiency) rez the first object in inventory 1m to the rear and to the left.

Wiki wiki wiki....

• llRot2Fwd
  
• llRot2Left
  
• llRot2Up
  
• llRezAtRoot
  
• llGetVel
  
• llGetRot
  
• llGetStartParamater
  

Jansen Miles IM'd me with a modification:

//llRot2Fwd() and it's kin represent a normalization of 1.0. So just multiply that by your actual desired vector components!
default
{

    touch_start(integer total_number)
    {
        //* Rezzed object offset from rezzer center.
        vector offset = <0, 0, 0.35>;

        llRezObject(llGetInventoryName(INVENTORY_OBJECT,0),
            llGetPos() + (llRot2Fwd(llGetRot()) * offset.x) + (llRot2Left(llGetRot()) * offset.y) + (llRot2Up(llGetRot()) * offset.z),
            llGetVel(), llGetRot(), llGetStartParameter());
    
    }
}

A slightly better example including Jansen's suggestion:

string inventory_item;

default
{
  state_entry()
  {
    inventory_item=llGetInventoryName(INVENTORY_OBJECT,0); // get the name of the first object in inventory
  }
  touch_start(integer p)
  {
    rot=llGetRot();

    //a vector is used to represent your offset in terms of fwd/back, left,right, up/down
    // eg. <-2,0,1> would be 2m back, 1m up

    vector offset=<-2,0,1>;


    vector rezpos=llGetPos() + (llRot2Fwd(rot) * offset.x) + (llRot2Left(rot) * offset.y) + (llRot2Up(rot) * offset.z);

    llRezAtRoot(inventory_item, rezpos, ZERO_VECTOR, rot, 0);
    //ZERO_VECTOR is used instead of a velocity.  One *could* use llGetVel if you "rezzer" is moving
    //the last "0' is the paramater that will be passed to on_rez in teh rezzed object
    

  }
}

I like the use of the vector for offsets!