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engines/hpl1/engine/physics/PhysicsJointScrew.h

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * Copyright (C) 2006-2010 - Frictional Games
+ *
+ * This file is part of HPL1 Engine.
+ */
+
+#ifndef HPL_PHYSICS_JOINT_SCREW_H
+#define HPL_PHYSICS_JOINT_SCREW_H
+
+#include "hpl1/engine/physics/PhysicsJoint.h"
+
+namespace hpl {
+
+//-----------------------------------
+
+kSaveData_ChildClass(iPhysicsJoint, iPhysicsJointScrew) {
+	kSaveData_ClassInit(iPhysicsJointScrew) public : float mfMaxDistance;
+	float mfMinDistance;
+	cVector3f mvPin;
+
+	virtual iSaveObject *CreateSaveObject(cSaveObjectHandler * apSaveObjectHandler, cGame * apGame);
+	virtual int GetSaveCreatePrio();
+};
+
+//-----------------------------------
+
+class iPhysicsJointScrew : public iPhysicsJoint {
+	typedef iPhysicsJoint super;
+
+public:
+	iPhysicsJointScrew(const tString &asName, iPhysicsBody *apParentBody, iPhysicsBody *apChildBody,
+					   iPhysicsWorld *apWorld, const cVector3f &avPivotPoint)
+		: iPhysicsJoint(asName, apParentBody, apChildBody, apWorld, avPivotPoint) {}
+	virtual ~iPhysicsJointScrew() {}
+
+	/**
+	 * Set the maximum distance the bodies can be from each other, relative to the start dist between them
+	 * This is true if pin points towards the child.
+	 * In other words, distance increases as the distance between start pivot and current pivot
+	 * increases in the opposite direction of the pin.
+	 */
+	virtual void SetMaxDistance(float afX) = 0;
+	virtual void SetMinDistance(float afX) = 0;
+	virtual float GetMaxDistance() = 0;
+	virtual float GetMinDistance() = 0;
+
+	ePhysicsJointType GetType() { return ePhysicsJointType_Screw; }
+
+	// SaveObject implementation
+	virtual iSaveData *CreateSaveData();
+	virtual void SaveToSaveData(iSaveData *apSaveData);
+	virtual void LoadFromSaveData(iSaveData *apSaveData);
+	virtual void SaveDataSetup(cSaveObjectHandler *apSaveObjectHandler, cGame *apGame);
+
+protected:
+	float mfMaxDistance;
+	float mfMinDistance;
+
+	cVector3f mvPin;
+};
+
+} // namespace hpl
+
+#endif // HPL_PHYSICS_JOINT_SCREW_H