Looking for a pre-made example of making an object move

I've seen many-an-object that can move when clicked or otherwise. I'm not talking about simple rotation, either, I'm talking a limb moves on a penguin or the wheels of an airplane rise up.

How is that done?

Does a certain scripting method "slowly" change the position of objects from points A,B,C to points D,E,F through sort of "tween" ?

Thanks a ton!

Hey there, i think what you are looking for is llSetPos and llSetRot . That should give you a good example of how to do what you are looking for

Ahh, you speak of child prim kinematics.

That is simply using llSetPos() in a different context. Instead of moving the prim in relation to the sim, you're moving it in relation to the root prim.

So, one easy way to move it, say one meter "up" is:

llSetPos(llGetLocalPos() + <0.0, 0.0, 1.0>;

You can still use absolute positioning ( llSetPos(<1.0, 1,0. -1.0>) ).

Rotating the prim is also done in relation to the root prim.

llSetLocalRot(ZERO_ROTATION);


Hope this helps some!

Thanks to both of you for your quick and informative responses! =D




So setting the position... would that make it "jerk" or jump over to the new position?

If so, could I use a for loop to make the movement look more fluid?

Sorry, I have no LSL knowledge, but a bit of C++

Yes and no. Sometimes it's fluid, but quick, sometimes it's instant. Depends on the conditions its operating in.

Yes, a for loop and some vector math would let you make it somewhat more smooth, however llSetPos and llSetLocalRot sleep the script (halt it) for 0.2 seconds, so there's always just a leetle jerk to it.

Thanks =)

How do you tell it where to hinge on, however?

I made a crappy little diagram up in mspaint to explain what I mean:

View image

Where the black circle is would be where I would want an object to "hinge" on...

Light grey lines indicate motion from down to up.

Sadly, you don't get to tell it, really. The axes toodle stright through the middle of the prim.

However, you can fudge that in some cases by cutting a prim in half. And you can cut prims in unusual ways by razing the prim, changing it to a sphere, dimpling it to half, then switching it back to the original shape. The "dimple" remains as an unusual axis cut.

Or you can do the math to figure out where the center of the prim is supposed to go, then rotate the prim. With the 0.2 second delay, that looks like poo every time .

So could I just do this?

View Image

Where the purple line is the center of the maroon colored movable object and the part of the maroon colored movable object inside the grey box is invisible to us do to the grey box's opaqueness.

No, that's what I'm trying to say doesn't work well. Position and rotation are all about the center of the prim. You can fake moving the axes to an edge by cutting. See attached for examples.

Woaho. 0_0

I've never seen that trick! =)

Then again, I've been around for like... four days =P

Thanks a lot

It is called prim torturing. There are other things you can do as well. Torus advanced cut is fun to play with switching and back. If you get really interested in it the following script is useful.

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

Hi again! I was experimenting with this stuff...

How do you manipulate
llSetLocalRot(ZERO_ROTATION); ?

ZERO_ROTATION is some data type I can't modify. For instance, it isn't an integer so I can't slap "+ 50" in there because it won't work.

Can I just do

llSetLocalRot(<1,1,1>; or something?

Thanks all! =D

ZERO_ROTATION is a constant of the type rotation.

You'd need to multiply or divide it by another rotation, or just replace it.

In

llSetLocalRot(<1,1,1>;

form?

Well, no. Rotations are quaternions, and those have four numbers in the set, and ... well, I don't quite have the hang of them exactly yet.
Read all about them on the page I linked for you above.

0_0

*gulp*

Ok, thanks... XD

llEuler2Rot can help ya out with the rotations

Oh thank God! XD

Oh thanks very much all of you!!!