Add PhysicsEffects to Extras. The build is only tested on Windows and Android.

The Android/NEON optimized version of Physics Effects is thanks to Graham Rhodes and Anthony Hamilton, See Issue 587

Extras/PhysicsEffects/include/physics_effects/util/pfx_mass.h

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+/*
+Physics Effects Copyright(C) 2010 Sony Computer Entertainment Inc.
+All rights reserved.
+
+Physics Effects is open software; you can redistribute it and/or
+modify it under the terms of the BSD License.
+
+Physics Effects 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 BSD License for more details.
+
+A copy of the BSD License is distributed with
+Physics Effects under the filename: physics_effects_license.txt
+*/
+
+///////////////////////////////////////////////////////////////////////////////
+//E Mass , Inertia tensor calculation
+//J 質量・慣性テンソルの算出
+
+#ifndef _SCE_PFX_MASS_H
+#define _SCE_PFX_MASS_H
+
+#include "../base_level/base/pfx_common.h"
+
+namespace sce {
+namespace PhysicsEffects {
+
+// Box
+PfxFloat pfxCalcMassBox(PfxFloat density,const PfxVector3 &halfExtent);
+PfxMatrix3 pfxCalcInertiaBox(const PfxVector3 &halfExtent,PfxFloat mass);
+
+// Sphere
+PfxFloat pfxCalcMassSphere(PfxFloat density,PfxFloat radius);
+PfxMatrix3 pfxCalcInertiaSphere(PfxFloat radius,PfxFloat mass);
+
+// Cylinder
+PfxFloat pfxCalcMassCylinder(PfxFloat density,PfxFloat halfLength,PfxFloat radius);
+PfxMatrix3 pfxCalcInertiaCylinderX(PfxFloat halfLength,PfxFloat radius,PfxFloat mass);
+PfxMatrix3 pfxCalcInertiaCylinderY(PfxFloat halfLength,PfxFloat radius,PfxFloat mass);
+PfxMatrix3 pfxCalcInertiaCylinderZ(PfxFloat halfLength,PfxFloat radius,PfxFloat mass);
+
+///////////////////////////////////////////////////////////////////////////////
+//E Mass convertion
+//J 質量の移動・回転・合成
+
+// translation
+//E returns translated inertia tensor
+//J 移動後の慣性テンソルを返します
+PfxMatrix3 pfxMassTranslate(PfxFloat mass,const PfxMatrix3 &inertia,const PfxVector3 &translation);
+
+// rotation
+//E returns rotated inertia tensor
+//J 回転後の慣性テンソルを返します
+PfxMatrix3 pfxMassRotate(const PfxMatrix3 &inertia,const PfxMatrix3 &rotate);
+
+} //namespace PhysicsEffects
+} //namespace sce
+
+#endif // _SCE_PFX_MASS_H