KFM

[mansoor50]

Hi.

am having a bit of trouble with KFM.

i am setting the starting trajectory of my fish as:

            llSetPos(home);
            llSetRot(llEuler2Rot(<0,15,90>*DEG_TO_RAD));
            r_6=<-8.0,0.0,2>;

this sets the fish pointing 15 deg up,

then the following KFM kicks in:

            r_6=<-8.0,0.0,2>;
            llSetKeyframedMotion([r_6, llEuler2Rot(<0, 0, 0> * DEG_TO_RAD), 5,
                <0,0,0>,llEuler2Rot(<0, 0, 90> * DEG_TO_RAD),2
                ],
                [KFM_MODE, KFM_FORWARD]);

after this, i notice that the the fish turns 90 to the left..which is what i want....BUT

the fish is tilted along the Y-axis. I have tried all sorts of angles to set the Y rotation to zero, but nothing seems to work.

how can i set the Y rotation to zero?

Edited October 16, 2017 by mansoor50

[Rolig Loon]

Note from the wiki:

Each keyframe is interpreted relative to the previous transform of the object.

So, when you issued your second KFM command, the object was already rotated 15 degrees on Y.  That's the starting rotation for the new keyframe. If you don't want that 15 degrees, you'll need to remove it explicitly, either by including a -15 degree rotation in Y in the new keyframe or by first introducing a quick 0.15 second keyframe that only does that single rotation.

[mansoor50]

Hi Rolig...

I changed my code as below:

llSetPos(home);
            llSetRot(llEuler2Rot(<0,0,90>*DEG_TO_RAD));
            r_6=<-8.0,0.0,2>;
            r_4=<0,-7,0>;
            llSetKeyframedMotion([<0,0,0>,llEuler2Rot(<0,15,0>*DEG_TO_RAD),1,
                r_6, llEuler2Rot(<0, 0, 0> * DEG_TO_RAD), 5,
                <0,0,0>,llEuler2Rot(<0, -15, 0> * DEG_TO_RAD),.15,
                <0,0,0>,llEuler2Rot(<0, 0, 90> * DEG_TO_RAD),.15
                ],
                [KFM_MODE, KFM_FORWARD]);
 

notice i put the 15 up within the KFM. the above is working fine EXCEPT that the fish is not pointing up. the fish remains "horizontal" and goes up.

[mansoor50]

It worked!!!

 

thanks!!!

[Rolig Loon]