Updated to Box2D 2.2, added new joints, some other updates to match the API changes (still plenty more to go though)

--HG-- branch : box2d-update
2026-08-17 02:58:31 +02:00 · 2011-09-03 15:39:32 -04:00
parent b3434997bf
commit 915e3e9d86
126 changed files with 8581 additions and 3772 deletions
@@ -0,0 +1,127 @@
+/**
+* Copyright (c) 2006-2011 LOVE Development Team
+* 
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* 
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 
+* 1. The origin of this software must not be misrepresented; you must not
+*    claim that you wrote the original software. If you use this software
+*    in a product, an acknowledgment in the product documentation would be
+*    appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+*    misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+**/
+
+#ifndef LOVE_PHYSICS_BOX2D_WHEEL_JOINT_H
+#define LOVE_PHYSICS_BOX2D_WHEEL_JOINT_H
+
+// Module
+#include "Joint.h"
+
+namespace love
+{
+namespace physics
+{
+namespace box2d
+{
+	/**
+	* WheelJoints provide two degrees of freedom: translation
+	* along a defined axis and rotation in the plane. Designed
+	* for vehicle suspensions.
+	**/
+	class WheelJoint : public Joint
+	{
+	private:
+
+		// The Box2D wheel joint object.
+		b2WheelJoint * joint;
+
+	public:
+
+		/**
+		* Creates a new WheelJoint connecting body1 and body2.
+		**/
+		WheelJoint(Body * body1, Body * body2, float x, float y, float ax, float ay);
+
+		virtual ~WheelJoint();
+
+		/**
+		* Get the current joint translation, usually in meters.
+		**/
+		float getJointTranslation() const;
+
+		/**
+		* Get the current joint translation speed, usually in meters per second.
+		**/
+		float getJointSpeed() const;
+
+		/**
+		* Enable/disable the joint motor.
+		**/
+		void enableMotor(bool motor);
+
+		/**
+		* Checks whether the motor is enabled.
+		**/
+		bool isMotorEnabled() const;
+
+		/**
+		* Set the motor speed, usually in meters per second.
+		**/
+		void setMotorSpeed(float speed);
+
+		/**
+		* Get the motor speed, usually in meters per second.
+		**/
+		float getMotorSpeed() const;
+		
+		/**
+		* Set the maximum motor torque, usually in N.
+		**/
+		void setMaxMotorTorque(float torque);
+		
+		/**
+		* Get the maximum motor torque, usually in N.
+		**/
+		float getMaxMotorTorque() const;
+		
+		/**
+		* Get the current motor torque, usually in N.
+		* @param inv_dt The inverse time step.
+		**/
+		float getMotorTorque(float inv_dt) const;
+
+		/**
+		* Set the spring frequency, in hertz. Setting the frequency to 0
+		* disables the spring.
+		**/
+		void setSpringFrequencyHz(float hz);
+		
+		/**
+		* Get the spring frequency, in hertz.
+		**/
+		float getSpringFrequencyHz() const;
+		
+		/**
+		* Set the spring damping ratio.
+		**/
+		void setSpringDampingRatio(float ratio);
+		
+		/**
+		* Get the spring damping ratio.
+		**/
+		float getSpringDampingRatio() const;
+		
+	};
+
+} // box2d
+} // physics
+} // love
+
+#endif // LOVE_PHYSICS_BOX2D_WHEEL_JOINT_H