ndDetectCollisions </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="struct_fab_g_l_1_1_sprite.html">Sprite</a> *&#160;</td>
          <td class="paramname"><em>sprite</em></td><td>)</td>
          <td></td>
        </tr>
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<p>Update collision detector and generate collision events. </p>
<p>When a sprite changes its position or size it is necessary to update the collision detector. This method updates the detector and generates collision 