PhysicsUtil.hpp

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00001 /*
00002 SagaEngine library
00003 Copyright (c) 2002-2006 Skalden Studio AS
00004 
00005 This software is provided 'as-is', without any express or implied 
00006 warranty. In no event will the authors be held liable for any 
00007 damages arising from the use of this software.
00008 
00009 Permission is granted to distribute the library under the terms of the 
00010 Q Public License version 1.0. Be sure to read and understand the license
00011 before using the library. It should be included here, or you may read it
00012 at http://www.trolltech.com/products/qt/licenses/licensing/qpl
00013 
00014 The original version of this library can be located at:
00015 http://www.sagaengine.com/
00016 
00017 Rune Myrland
00018 rune@skalden.com
00019 */
00020 
00021 
00022 #ifndef engine_physics_PhysicsUtil_hpp
00023 #define engine_physics_PhysicsUtil_hpp
00024 
00025 #include "util/type/util_type.hpp"
00026 #include "util/math/CoorT.hpp"
00027 #include "util/vecmath/Vector3.hpp"
00028 
00029 
00030 namespace se_core {
00031     class _SeCoreExport PhysicsUtil {
00032     public:
00042         inline static scale_t heightXZScaler(Vector3& f, bray_t dir, Vector3& tmp) {
00043 
00044             // Calc unit vector (in xz plane) with direction
00045             tmp.setForward(COOR_RES, dir);
00046 
00047             // Calc height change along unit vector
00048             coor_t dy = CoorT::abs(CoorT::fromd(CoorT::muld(tmp.x_, f.x_) + CoorT::muld(tmp.z_, f.z_)));
00049             // Calc how much the speed along the xz-plane
00050             // as a result of this height difference
00051             return CoorT::heightScaler(dy);
00052         }
00053     private:
00054     };
00055 }
00056 
00057 #endif

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