engine revolution based cab shake configuration support, rear cab door controls animation fix

Spring.h

@@ -11,9 +11,8 @@ http://mozilla.org/MPL/2.0/.
 #define ParticlesH
 
 #include "dumb3d.h"
-
+/*
 #define STATIC_THRESHOLD 0.17f
-// efine STATIC_THRESHOLD	0.03f
 const double m_Kd = 0.02f; // DAMPING FACTOR
 const double m_Kr = 0.8f; // 1.0 = SUPERBALL BOUNCE 0.0 = DEAD WEIGHT
 const double m_Ksh = 5.0f; // HOOK'S SPRING CONSTANT
@@ -21,22 +20,20 @@ const double m_Ksd = 0.1f; // SPRING DAMPING CONSTANT
 
 const double m_Csf = 0.9f; // Default Static Friction
 const double m_Ckf = 0.7f; // Default Kinetic Friction
+*/
+class TSpring {
 
-class TSpring
-{
-  public:
-    TSpring();
-    ~TSpring();
+public:
+    TSpring() = default;
     //    void Init(TParticnp1, TParticle *np2, double nKs= 0.5f, double nKd= 0.002f,
     //    double nrestLen= -1.0f);
-    void Init(double nrestLen, double nKs = 0.5f, double nKd = 0.002f);
+    void Init(double nKs = 0.5f, double nKd = 0.002f);
     Math3D::vector3 ComputateForces( Math3D::vector3 const &pPosition1, Math3D::vector3 const &pPosition2);
-    void Render();
-    Math3D::vector3 vForce1, vForce2;
-    double restLen; // LENGTH OF SPRING AT REST
-    double Ks; // SPRING CONSTANT
-    double Kd; // SPRING DAMPING
-  private:
+private:
+// members
+    double restLen { 0.01 }; // LENGTH OF SPRING AT REST
+    double Ks { 0.0 }; // SPRING CONSTANT
+    double Kd { 0.0 }; // SPRING DAMPING
 };
 
 //---------------------------------------------------------------------------