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Diffstat (limited to 'engines/wintermute/math/matrix4.cpp')
-rw-r--r-- | engines/wintermute/math/matrix4.cpp | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/engines/wintermute/math/matrix4.cpp b/engines/wintermute/math/matrix4.cpp new file mode 100644 index 0000000000..ca1eae8813 --- /dev/null +++ b/engines/wintermute/math/matrix4.cpp @@ -0,0 +1,86 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +/* + * This file is based on WME Lite. + * http://dead-code.org/redir.php?target=wmelite + * Copyright (c) 2011 Jan Nedoma + */ + +#include "engines/wintermute/math/matrix4.h" +#include "engines/wintermute/math/vector2.h" +#include <math.h> + +namespace Wintermute { + +////////////////////////////////////////////////////////////////////////// +Matrix4::Matrix4() { + for (int i = 0; i < 4; i++) { + for (int j = 0; j < 4; j++) { + m[i][j] = 0.0f; + } + } +} + +////////////////////////////////////////////////////////////////////////// +Matrix4::~Matrix4() { +} + + +////////////////////////////////////////////////////////////////////////// +void Matrix4::identity() { + for (int i = 0; i < 4; i++) { + for (int j = 0; j < 4; j++) { + m[i][j] = 0.0f; + } + } + m[0][0] = 1.0f; + m[1][1] = 1.0f; + m[2][2] = 1.0f; + m[3][3] = 1.0f; + +} + +////////////////////////////////////////////////////////////////////////// +void Matrix4::rotationZ(float angle) { + identity(); + + m[0][0] = cos(angle); + m[1][1] = cos(angle); + m[0][1] = sin(angle); + m[1][0] = -sin(angle); +} + +////////////////////////////////////////////////////////////////////////// +void Matrix4::transformVector2(Vector2 &vec) { + float norm; + + norm = m[0][3] * vec.x + m[1][3] * vec.y + m[3][3]; + + float x = (m[0][0] * vec.x + m[1][0] * vec.y + m[3][0]) / norm; + float y = (m[0][1] * vec.x + m[1][1] * vec.y + m[3][1]) / norm; + + vec.x = x; + vec.y = y; +} + +} // end of namespace Wintermute |