/**
* Datasource binding method prototype
*
* When overloaded, should either return true or a PEAR_Error object
*
* @return object PEAR_Error An error with message
* 'No data source driver loaded'
* @access public
*/
function bind()
{
return PEAR_Error("No data source driver loaded");
}
/**
* Vector triple scalar product = v1 . (v2 x v3)
*
* @access public
* @param object Math_Vector3 (or subclass) $v1
* @param object Math_Vector3 (or subclass) $v2
* @param object Math_Vector3 (or subclass) $v3
* @return mixed the triple scalar product (float) on success, a PEAR_Error object otherwise
*
* @see isVector3()
* @see dotProduct()
* @see crossProduct()
*/
function tripleScalarProduct($v1, $v2, $v3)
{
if (Math_VectorOp::isVector3($v1) && Math_VectorOp::isVector3($v2) && Math_VectorOp::isVector3($v3)) {
return Math_VectorOp::dotProduct($v1, Math_VectorOp::crossProduct($v2, $v3));
} else {
return PEAR_Error("All three vectors must be of the same type");
}
}