Difference between revisions of "User:Dora Gustafson/point tracker"
| Line 10: | Line 10: | ||
// Translation divided in a straight one and one including a rotation | // Translation divided in a straight one and one including a rotation | ||
// Object forward can either be horizontal or follow path forward up and down | // Object forward can either be horizontal or follow path forward up and down | ||
// v1.02.1 For WIKI. RefFrame inverted. Track is relative to where script is reset | |||
float speed=2.0; // m/S | float speed=2.0; // m/S | ||
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rotation refFrame=<0.0, 0.0, 0.0, 1.0>; | rotation refFrame=<0.0, 0.0, 0.0, 1.0>; | ||
list KFMlist; | list KFMlist; | ||
vector basePos; | |||
integer i; | integer i; | ||
integer j; | integer j; | ||
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vector V; | vector V; | ||
vector W; | vector W; | ||
vector LEFT=< 0.0, 1.0, 0.0 >; | vector LEFT=< 0.0, 1.0, 0.0 >; | ||
| Line 42: | Line 42: | ||
state_entry() | state_entry() | ||
{ | { | ||
llSetPrimitiveParams([PRIM_PHYSICS_SHAPE_TYPE, PRIM_PHYSICS_SHAPE_CONVEX]); // make client mesh-aware | |||
refFrame.s = -refFrame.s; | |||
basePos = llGetPos(); | |||
L = llGetListLength(track); | L = llGetListLength(track); | ||
KFMlist = []; | KFMlist = []; | ||
| Line 60: | Line 60: | ||
touch_end(integer n) | touch_end(integer n) | ||
{ | { | ||
llSetPrimitiveParams([PRIM_POSITION, basePos, PRIM_ROTATION, refFrame*Vec2Rot(llList2Vector( track, 1)-llList2Vector( track, 0))]); | |||
llSetKeyframedMotion( KFMlist, []); | |||
llSetKeyframedMotion( | |||
} | } | ||
} | } | ||
Revision as of 08:32, 15 January 2012
KFM Key framed Motion forward on a closed track
<lsl> // point tracker script by Dora Gustafson, Studio Dora 2011 // The objct follows a path given by a number of points beginning with the object's position == <0,0,0> // The path is closed so it ends where it begins // Points prim's X-axis forward along the path and it's Y-axis is always horizontal // v1.01 simplified for focus // v1.02 with 'refFrame' like in vehicles, to change what is forward // Translation divided in a straight one and one including a rotation // Object forward can either be horizontal or follow path forward up and down // v1.02.1 For WIKI. RefFrame inverted. Track is relative to where script is reset
float speed=2.0; // m/S float straight=0.75; // part to travel without turning. 0.0 <= straight < 1.0 integer horz=FALSE; // TRUE object forward horizontal no matter if the track goes up or down list track=[<0,0,0>,<4,0,0>,<4,5,2>,<0,5,2>]; // list of points to track; must have at least 2 elements rotation refFrame=<0.0, 0.0, 0.0, 1.0>; list KFMlist; vector basePos; integer i; integer j; integer k; integer L; vector U; vector V; vector W; vector LEFT=< 0.0, 1.0, 0.0 >;
rotation Vec2Rot( vector FWD ) {
FWD = llVecNorm( FWD ); vector UP = < 0.0, 0.0, 1.0 >; if ( llFabs(FWD.z) < 1.0 ) LEFT = llVecNorm(UP%FWD); if (horz) FWD = llVecNorm(LEFT%UP); else UP = llVecNorm(FWD%LEFT); return llAxes2Rot(FWD, LEFT, UP);
}
default {
state_entry()
{
llSetPrimitiveParams([PRIM_PHYSICS_SHAPE_TYPE, PRIM_PHYSICS_SHAPE_CONVEX]); // make client mesh-aware
refFrame.s = -refFrame.s;
basePos = llGetPos();
L = llGetListLength(track);
KFMlist = [];
for ( i=0; i<L; i++)
{
j = (i+1) % L;
V = llList2Vector( track, j)-llList2Vector( track, i);
U = straight*V;
KFMlist += [U, ZERO_ROTATION, 0.1+llVecMag(U)/speed];
k = (j+1) % L;
W = llList2Vector( track, k)-llList2Vector( track, j);
KFMlist += [V-U, refFrame*Vec2Rot(W)/(refFrame*Vec2Rot(V)), 0.1+llVecMag(V-U)/speed];
}
}
touch_end(integer n)
{
llSetPrimitiveParams([PRIM_POSITION, basePos, PRIM_ROTATION, refFrame*Vec2Rot(llList2Vector( track, 1)-llList2Vector( track, 0))]);
llSetKeyframedMotion( KFMlist, []);
}
} </lsl>