+init

1 files changed, 134 insertions, 0 deletions

diff --git a/Client/ThirdParty/Box2D/include/box2d/b2_mouse_joint.h b/Client/ThirdParty/Box2D/include/box2d/b2_mouse_joint.h
new file mode 100644
index 0000000..fcbc56a
--- /dev/null
+++ b/Client/ThirdParty/Box2D/include/box2d/b2_mouse_joint.h
@@ -0,0 +1,134 @@
+// MIT License
+
+// Copyright (c) 2019 Erin Catto
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#ifndef B2_MOUSE_JOINT_H
+#define B2_MOUSE_JOINT_H
+
+#include "b2_api.h"
+#include "b2_joint.h"
+
+/// Mouse joint definition. This requires a world target point,
+/// tuning parameters, and the time step.
+struct B2_API b2MouseJointDef : public b2JointDef
+{
+	b2MouseJointDef()
+	{
+		type = e_mouseJoint;
+		target.Set(0.0f, 0.0f);
+		maxForce = 0.0f;
+		stiffness = 0.0f;
+		damping = 0.0f;
+	}
+
+	/// The initial world target point. This is assumed
+	/// to coincide with the body anchor initially.
+	b2Vec2 target;
+
+	/// The maximum constraint force that can be exerted
+	/// to move the candidate body. Usually you will express
+	/// as some multiple of the weight (multiplier * mass * gravity).
+	float maxForce;
+
+	/// The linear stiffness in N/m
+	float stiffness;
+
+	/// The linear damping in N*s/m
+	float damping;
+};
+
+/// A mouse joint is used to make a point on a body track a
+/// specified world point. This a soft constraint with a maximum
+/// force. This allows the constraint to stretch and without
+/// applying huge forces.
+/// NOTE: this joint is not documented in the manual because it was
+/// developed to be used in the testbed. If you want to learn how to
+/// use the mouse joint, look at the testbed.
+class B2_API b2MouseJoint : public b2Joint
+{
+public:
+
+	/// Implements b2Joint.
+	b2Vec2 GetAnchorA() const override;
+
+	/// Implements b2Joint.
+	b2Vec2 GetAnchorB() const override;
+
+	/// Implements b2Joint.
+	b2Vec2 GetReactionForce(float inv_dt) const override;
+
+	/// Implements b2Joint.
+	float GetReactionTorque(float inv_dt) const override;
+
+	/// Use this to update the target point.
+	void SetTarget(const b2Vec2& target);
+	const b2Vec2& GetTarget() const;
+
+	/// Set/get the maximum force in Newtons.
+	void SetMaxForce(float force);
+	float GetMaxForce() const;
+
+	/// Set/get the linear stiffness in N/m
+	void SetStiffness(float stiffness) { m_stiffness = stiffness; }
+	float GetStiffness() const { return m_stiffness; }
+
+	/// Set/get linear damping in N*s/m
+	void SetDamping(float damping) { m_damping = damping; }
+	float GetDamping() const { return m_damping; }
+
+	/// The mouse joint does not support dumping.
+	void Dump() override { b2Log("Mouse joint dumping is not supported.\n"); }
+
+	/// Implement b2Joint::ShiftOrigin
+	void ShiftOrigin(const b2Vec2& newOrigin) override;
+
+protected:
+	friend class b2Joint;
+
+	b2MouseJoint(const b2MouseJointDef* def);
+
+	void InitVelocityConstraints(const b2SolverData& data) override;
+	void SolveVelocityConstraints(const b2SolverData& data) override;
+	bool SolvePositionConstraints(const b2SolverData& data) override;
+
+	b2Vec2 m_localAnchorB;
+	b2Vec2 m_targetA;
+	float m_stiffness;
+	float m_damping;
+	float m_beta;
+
+	// Solver shared
+	b2Vec2 m_impulse;
+	float m_maxForce;
+	float m_gamma;
+
+	// Solver temp
+	int32 m_indexA;
+	int32 m_indexB;
+	b2Vec2 m_rB;
+	b2Vec2 m_localCenterB;
+	float m_invMassB;
+	float m_invIB;
+	b2Mat22 m_mass;
+	b2Vec2 m_C;
+};
+
+#endif