public function ALiVE_Plane($arg0, $arg1, $arg2 = null)
{
if ($arg2 === null) {
// new ALiVE_Plane( $point, $normal )
w_assert($arg0 instanceof ALiVE_Vector);
w_assert($arg1 instanceof ALiVE_Unit_Vector);
$this->mPoint = $arg0;
$this->mNormal = $arg1;
} else {
// new ALiVE_Plane( $point1, $point2, $point3 );
w_assert($arg0 instanceof ALiVE_Vector);
w_assert($arg1 instanceof ALiVE_Vector);
w_assert($arg2 instanceof ALiVE_Vector);
// make sure we have three distinct points
w_assert($arg0 != $arg1);
w_assert($arg1 != $arg2);
w_assert($arg0 != $arg2);
// compute the normal vector
$this->mNormal = ALiVE_Vectors_CrossProduct(ALiVE_Vectors_Subtract($arg1, $arg0), ALiVE_Vectors_Subtract($arg2, $arg0));
$this->mPoint = $arg0;
}
}
<?php require_once 'alive.php'; $invector = new ALiVE_Vector(5, -3, 12); $outvector = new ALiVE_Vector(1, 0, 0); $myplane = new ALiVE_Plane(new ALiVE_Vector(0, 0, 0), new ALiVE_Vector(12, 3, 108), new ALiVE_Vector(5, -3, 12)); w_assert($myplane->Contains($invector)); w_assert(!$myplane->Contains($outvector)); $i = new ALiVE_Vector_I(); $j = new ALiVE_Vector_J(); $k = new ALiVE_Vector_K(); w_assert(ALiVE_Vectors_Equal(ALiVE_Vectors_CrossProduct($i, $j), $k)); w_assert(ALiVE_Vectors_Equal(ALiVE_Vectors_CrossProduct($j, $k), $i)); w_assert(ALiVE_Vectors_Equal(ALiVE_Vectors_CrossProduct($k, $i), $j)); $matrix = ALiVE_Matrix_Create_Identity(4); w_assert($matrix->M() == 4 && $matrix->N() == 4); w_assert($matrix->Get(0, 1) == 0); w_assert($matrix->Get(0, 0) == 1); w_assert($matrix->Get(1, 1) == 1); w_assert($matrix->Get(2, 2) == 1); w_assert($matrix->Get(3, 3) == 1); $neutral = new ALiVE_Transformation_Neutral(); $vector = new ALiVE_Vector(10.5, 7, -34.67); $result = $neutral->Apply($vector); w_assert($result instanceof ALiVE_Vector); w_assert($result->X() == 10.5); w_assert($result->Y() == 7); w_assert($result->Z() == -34.67); $p = new ALiVE_Vector(0.4, 0, 0); $neutral1 = new ALiVE_Translation(0, 0, 0); $neutral2 = new ALiVE_Rotation(0, 0, 0);
