Calculate the Viewpoint orientation to look at a specific target position in VRML or X3D

gistfile1.js

/**
 * `target` is where you want to look at.
 *
 * `position` is the SFVec3f location of your viewpoint.
 *
 * `orientation ` is the resulting SFRotation of your viewpoint.
 *
 * Optionally, modify `new SFVec3f(0, 0, -1)` to change the roll.
 *
 */
var orientation = new SFRotation( target.subtract(position), new SFVec3f(0, 0, -1) );