Continuous local rotation vs DEG_TO_RAD

[Friday Siamendes]

I am trying to attach a spotlight to an avatar, and rotate the spotlight along its local Z axis - so that the orientation of the spotlight can be adjusted and it will continue to rotate around the direction of its "beam."

I am an illiterate in scripting but have figured out that the script must Get Local Rotation, and I have tried several posted variants. The script below comes from an old post by the wonderful Rolig Loon - and it ALMOST does what I need. I have figured out how to set the desired axis, duration between touches etc. 

But I need continuous rotation (or as close as possible) - and the Euler syntax (if I understand it) rotates incrementally as it keeps re-reading the axes. I have tried replacing the Euler with other rotation phrases but I'm too dumb to succeed.

How can I program the object to behave exactly the same EXCEPT with "smooth" continous rotation rather than the tick-tick-tick-by-degree rotation? Thanks very much, wizards of script!

The script:

integer count;
default
{
touch_start(integer total)
{
llSetTimerEvent(1);
count = 0;
}

timer()
{
++count;
llSetRot(llEuler2Rot(<2.0,0,0> * DEG_TO_RAD)*llGetLocalRot());
if (count > 30) llSetTimerEvent(0);
}
}

[161488303349]

can have a look at llTargetOmega if you like. it can do smooth rotation

http://wiki.secondlife.com/wiki/LlTargetOmega

[Richie Kanto]

To avoid the jerky "stop start" look, lessen the amount of time between movement. This will achieve the affect of a more continuous, smooth movement to the prim. Here's your script modified as such below:

integer count;

default

{

touch_start(integer total)

{

llSetTimerEvent(0.25);

count = 0;

}

timer()

{

++count; llSetRot(llEuler2Rot(<2.0,0,0> * DEG_TO_RAD)*llGetLocalRot());

if (count > 30) llSetTimerEvent(0);

}

}

 

**NOTE: Your last written line here "if (count > 30) llSetTimerEvent(0);" will STOP the rotation after it's moved 30 times. I'm not sure why you'd do that as it's no where in your explanation of what you need you script to do. Remove this line from your script to make the movement continuous. Feel free to IM me directly in world if you have additional questions.

[Rolig Loon]

You're never going to get smooth rotation with a script that moves incrementally.  The best you can do by making dozens of tinier steps is to makey the movement less jumpy.  For smooth rotation, you have two choices.  The best one in most cases is llTargetOmega.  It's nice and simple to script.  The other option, slightly harder to script but just as smooth, is llSetKeyframedMotion.  Take a look at both and decide.  You'll see sample scripts to play with in their wiki pages.

[Dora Gustafson]

I agree with 16, use llTargetOmega:)

// llTargetOmega attached by Dora Gustafson, Studio Dora 2012

// after the attach position is changed the script should be reset

vector rotAxis = < 0.0, 0.0, 1.0 >; // local prim axis to spin around

float speed = 1.25; // rad/S;

float gain = 1.0;

default

{

    state_entry()

    {

        llTargetOmega( rotAxis*llGetLocalRot(), speed, gain );

    }

    attach(key id)

    {

        if (id) llTargetOmega( rotAxis*llGetLocalRot(), speed, gain );

    }

}

This script will spin the prim about the prim's Z-axis when attached
It must be reset to update the spin after a changed attachment position and/or -rotation

[Friday Siamendes]

Thanks 16 but I have tried the TargetOmega scripts there and none of them work inworld as indicated. For example, the third script says:

//Rotates very slowly around a cylinder's local or global Z axis // .... Good for making a propeller that rotates regardless of initial orientation.

But whether attached to a root prim, attached to an avatar or unattached, the cylinder or cube follows the Global z axis (a sphere is not useful because it has no spotlight feature on a face). So I don't see how this would work for a propeller, for example, or my purposes. The first script on the TargetOmega page produced a syntax error, and the second script is for spheres so the axis syntax doesn't operate in a cute or cyclinder.

That's why I am trying to modify the script I quoted - it's the only one I've found that actually rotates around the internal/local axis when I tip it unattached or attach it to the avatar. Frustrating! Thanks for the suggestion though!

 

[Friday Siamendes]

You are scripting gods, all of you! The project I submit to Machinima Expo will credit everyone by name. Thank you Dora and everyone!

[Friday Siamendes]

And thank you for being too polite to say: "after reorientating the object, did you click the RESET button, Friday?"