build 181030. basic external views system

DynObj.h

@@ -19,6 +19,7 @@ http://mozilla.org/MPL/2.0/.
 #include "Button.h"
 #include "AirCoupler.h"
 #include "sound.h"
+#include "Spring.h"
 
 //---------------------------------------------------------------------------
 //---------------------------------------------------------------------------
@@ -444,8 +445,6 @@ private:
     exchange_data m_exchange; // state of active load exchange procedure, if any
     exchange_sounds m_exchangesounds; // sounds associated with the load exchange
 
-    Math3D::vector3 modelShake;
-
     bool renderme; // yB - czy renderowac
     float ModCamRot;
     int iInventory[ 2 ] { 0, 0 }; // flagi bitowe posiadanych submodeli (np. świateł)
@@ -540,6 +539,9 @@ private:
     void RenderSounds();
     inline Math3D::vector3 GetPosition() const {
         return vPosition; };
+    // converts location from vehicle coordinates frame to world frame
+    inline Math3D::vector3 GetWorldPosition( Math3D::vector3 const &Location ) const {
+        return vPosition + mMatrix * Location; }
     // pobranie współrzędnych czoła
     inline Math3D::vector3 HeadPosition() {
         return vCoulpler[iDirection ^ 1]; };
@@ -638,6 +640,41 @@ private:
 	double MEDLogTime = 0;
 	double MEDLogInactiveTime = 0;
 	int MEDLogCount = 0;
+
+// vehicle shaking calculations
+// TBD, TODO: make an object out of it
+public:
+// methods
+    void update_shake( double const Timedelta );
+    std::pair<double, double> shake_angles() const;
+// members
+    struct baseshake_config {
+        Math3D::vector3 angle_scale { 0.05, 0.0, 0.1 }; // roll, yaw, pitch
+        Math3D::vector3 jolt_scale { 0.2, 0.2, 0.1 };
+        double jolt_limit { 0.15 };
+    } BaseShake;
+    struct engineshake_config {
+        float scale { 2.f };
+        float fadein_offset { 1.5f }; // 90 rpm
+        float fadein_factor { 0.3f };
+        float fadeout_offset { 10.f }; // 600 rpm
+        float fadeout_factor { 0.5f };
+    } EngineShake;
+    struct huntingshake_config {
+        float scale { 1.f };
+        float frequency { 1.f };
+        float fadein_begin { 0.f }; // effect start speed in km/h
+        float fadein_end { 0.f }; // full effect speed in km/h
+    } HuntingShake;
+    float HuntingAngle { 0.f }; // crude approximation of hunting oscillation; current angle of sine wave
+    bool IsHunting { false };
+    TSpring ShakeSpring;
+    struct shake_state {
+        Math3D::vector3 velocity {}; // current shaking vector
+        Math3D::vector3 offset {}; // overall shake-driven offset from base position
+    } ShakeState;
+
+    Math3D::vector3 modelShake;
 };