Difference between revisions of "LlAxes2Rot"

Revision as of 08:43, 6 April 2008

Function: rotation llAxes2Rot( vector fwd, vector left, vector up );

Returns a rotation that is defined by the 3 coordinate axes

All three vectors must be mutually orthogonal unit vectors.

<lsl> default {

   state_entry()
   {
       rotation rot = llAxes2Rot(
           < 0, 1, 0>,
           < -1, 0, 0>,
           < 0, 0, 1>);

       llSay(0, (string) (llRot2Euler(rot) * RAD_TO_DEG) );
   }

}</lsl>

This script shows that the (i, j, k) system of axes is rotated into (j, -i, k) with a 90° rotation around z direction.

Technically, only the first two vectors are needed to define this rotation, which can be done by calling:

llAxes2Rot(fwd, left, fwd % left);

Signature
function rotation llAxes2Rot( vector fwd, vector left, vector up );

@@ Line 12: / Line 12: @@
 |spec
 |caveats
-|examples
+|examples=<lsl>
+default
+{
+    state_entry()
+    {
+        rotation rot = llAxes2Rot(
+            < 0, 1, 0>,
+            < -1, 0, 0>,
+            < 0, 0, 1>);
+        llSay(0, (string) (llRot2Euler(rot) * RAD_TO_DEG) );
+    }
+}</lsl>
+This script shows that the (i, j, k) system of axes is rotated into (j, -i, k) with a 90° rotation around z direction.
 |helpers
 |also_functions