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MATH: Add in the inverse functions from Portalib3d

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Einar Johan T. Sømåen 2012-01-31 16:59:09 +01:00
parent 3a147c88ef
commit d4413d7f58
2 changed files with 30 additions and 1 deletions
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27
math/matrix4.cpp
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@ -66,5 +66,32 @@ void Matrix<4, 4>::translate(const Vector3d &vec) {
operator()(2, 3) += v.z();
}
// The following functions are adapted from Portalib3d, which no longer is
// available on the net, but was used in the iconoclast-project:
// http://code.google.com/p/iconoclast/
// Original copyright notice (license.txt was not supplied in iconoclast,
// but should match our LGPL-license):
// Author: Brett Porter
// Email: brettporter@yahoo.com
// Website: http://rsn.gamedev.net/pl3d
// Copyright (C)2000, 2001, Brett Porter. All Rights Reserved.
// This source code is released under the LGPL. See license.txt for details.
void Matrix<4, 4>::inverseTranslate(Vector3d *v) {
v->x() = v->x() - getValue(0, 3);
v->y() = v->y() - getValue(1, 3);
v->z() = v->z() - getValue(2, 3);
}
void Matrix<4, 4>::inverseRotate(Vector3d *v) {
Vector3d temp;
temp.x() = v->x() * getValue(0, 0) + v->y() * getValue(1, 0) + v->z() * getValue(2, 0);
temp.y() = v->x() * getValue(0, 1) + v->y() * getValue(1, 1) + v->z() * getValue(2, 1);
temp.z() = v->x() * getValue(0, 2) + v->y() * getValue(1, 2) + v->z() * getValue(2, 2);
*v = temp;
}
} // end of namespace Math