From: Florian Forster Date: Sat, 30 Jan 2010 10:13:20 +0000 (+0000) Subject: src/math/aatriangle.cpp: Added forgotten new file. X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=1f4f739047976fe8fe6b823ff5493b126d854cd6;p=supertux.git src/math/aatriangle.cpp: Added forgotten new file. This file should have been part of the previous commit, but I forgot to add it. SVN-Revision: 6287 --- diff --git a/src/math/aatriangle.cpp b/src/math/aatriangle.cpp new file mode 100644 index 000000000..815e58d19 --- /dev/null +++ b/src/math/aatriangle.cpp @@ -0,0 +1,38 @@ +// $Id$ +// +// SuperTux +// Copyright (C) 2009 Matt McCutchen +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +#include "aatriangle.hpp" + +int AATriangle::vertical_flip(int dir) { + int direction = dir & AATriangle::DIRECTION_MASK; + direction = 3 - direction; + int deform = dir & AATriangle::DEFORM_MASK; + switch (deform) { + case AATriangle::DEFORM1: + deform = AATriangle::DEFORM2; + break; + case AATriangle::DEFORM2: + deform = AATriangle::DEFORM1; + break; + default: + // unchanged + break; + } + return (direction | deform); +}