User:Dora Gustafson/universal hinged motion

Universal hinged motion in 8 key frames

Using llSetKeyFramedMotion() <lsl> // Universal hinged motion by Dora Gustafson, Studio Dora 2012 // will turn a box prim around one edge parallel to the prim's Y-axis // for any prim orientation // note that the smallest accepted time per frame is 1/9=0.11111111 and NOT 0.1 // v1.03 tuned for wiki // v1.04 time tuning

float angleEnd=PI_BY_TWO; float speed=0.2; // m/S float steps=8.0; // number of Key Frames float step=0.0; list KFMlist=[]; vector V; integer open=TRUE; vector basePos; rotation baseRot;

float motion_time( float mt) {

   mt = llRound(45.0*mt)/45.0;
   if ( mt > 0.11111111 ) return mt;
   else return 0.11111111;

}

default {

   state_entry()
   {
       llSetMemoryLimit(0x2000);
       llOwnerSay((string)llGetFreeMemory());
       llSetPrimitiveParams([PRIM_PHYSICS_SHAPE_TYPE, PRIM_PHYSICS_SHAPE_CONVEX]);
       basePos = llGetPos();
       baseRot = llGetRot();
       vector v1 = 0.5*llGetScale()*llGetRot();
       rotation deltaRot = llEuler2Rot(< 0.0, angleEnd/steps, 0.0>);
       while ( step < steps )
       {
           V = v1*llAxisAngle2Rot(llRot2Left(llGetRot()), angleEnd*step/steps);
           V = v1*llAxisAngle2Rot(llRot2Left(llGetRot()), angleEnd*(step+1.0)/steps) - V;
           KFMlist += [V, deltaRot, motion_time(llVecMag(V)/speed)];
           step += 1.0;
       }
   }
   touch_end( integer n)
   {
       llSetKeyframedMotion( [], []);
       if ( open )
       {
           llSetPrimitiveParams([PRIM_POSITION, basePos, PRIM_ROTATION, baseRot]);
           llSetKeyframedMotion( KFMlist, []);
       }
       else
       {
           llSetKeyframedMotion( KFMlist, [KFM_MODE, KFM_REVERSE]);
       }
       open = !open;
   }
   on_rez( integer n) { llResetScript(); }

} </lsl> After editing prim position, rotation and/or size the script should be reset in order to update the motion