send perioic gamepad axis change callbacks even if direction didn't change

src/C4Application.cpp

@@ -159,7 +159,7 @@ bool C4Application::DoInit()
 			return true;
 #endif
 
-	DDrawCfg.Shader = Config.Graphics.EnableShaders;
+	DDrawCfg.Shader = !!Config.Graphics.EnableShaders;
 
 	// Fixup resolution
 	ApplyResolutionConstraints();

src/control/C4GameControl.cpp

@@ -29,6 +29,7 @@
 #include <C4Log.h>
 #include <C4Network2Stats.h>
 #include <C4MouseControl.h>
+#include <C4GamePadCon.h>
 
 #ifdef _MSC_VER
 #pragma warning (disable: 4355)
@@ -530,6 +531,7 @@ void C4GameControl::PrepareInput()
 {
 	// add per-controlframe input
 	::MouseControl.DoMoveInput();
+	if (Application.pGamePadControl) Application.pGamePadControl->DoAxisInput();
 }
 
 C4GameControl Control;

src/platform/C4GamePadCon.cpp

@@ -60,20 +60,24 @@ void C4GamePadControl::Clear()
 	}
 
 void C4GamePadControl::OpenGamepad(int id)
-	{
+{
 	if (!Inside(id, 0, CStdGamepad_MaxGamePad-1)) return;
 	// add gamepad ref
 	if (!(Gamepads[id].iRefCount++))
-		{
+	{
 		// this is the first gamepad opening: Init it
 		Pad &rPad = Gamepads[id];
 		rPad.pGamepad = new CStdGamePad(id);
 		rPad.Buttons= 0;
-		for (int i=0; i< CStdGamepad_MaxAxis; ++i) rPad.AxisPosis[i] = CStdGamePad::Mid;
+		for (int i=0; i< CStdGamepad_MaxAxis; ++i)
+		{
+			rPad.AxisPosis[i] = CStdGamePad::Mid;
+			rPad.AxisStrengths[i] = 0;
+		}
 		rPad.pGamepad->SetCalibration(&(Config.Gamepads[id].AxisMin[0]), &(Config.Gamepads[id].AxisMax[0]), &(Config.Gamepads[id].AxisCalibrated[0]));
 		++iNumGamepads;
-		}
 	}
+}
 
 void C4GamePadControl::CloseGamepad(int id)
 	{
@@ -98,7 +102,7 @@ int C4GamePadControl::GetGamePadCount()
 
 const int MaxGamePadButton=10;
 
-void C4GamePadControl::Execute()
+void C4GamePadControl::Execute(bool send_axis_strength_changes)
 	{
 	// Get gamepad inputs
 	int iNum = iNumGamepads;
@@ -113,11 +117,13 @@ void C4GamePadControl::Execute()
 			{
 			int32_t iStrength = 100;
 			CStdGamePad::AxisPos eAxisPos = rPad.pGamepad->GetAxisPos(iAxis, &iStrength), ePrevAxisPos = rPad.AxisPosis[iAxis];
+			int32_t iPrevStrength = rPad.AxisStrengths[iAxis];
 			// Evaluate changes and pass single controls
 			// this is a generic Gamepad-control: Create events
-			if (eAxisPos != ePrevAxisPos)
+			if (eAxisPos != ePrevAxisPos || (send_axis_strength_changes && Abs(iPrevStrength-iStrength) > AxisStrengthChangeThreshold))
 				{
 				rPad.AxisPosis[iAxis] = eAxisPos;
+				rPad.AxisStrengths[iAxis] = iStrength;
 				if (ePrevAxisPos != CStdGamePad::Mid)
 					Game.DoKeyboardInput(KEY_Gamepad(idGamepad, KEY_JOY_Axis(iAxis, (ePrevAxisPos==CStdGamePad::High))), KEYEV_Up, false, false, false, false);
 				if (eAxisPos != CStdGamePad::Mid)
@@ -139,6 +145,13 @@ void C4GamePadControl::Execute()
 		}
 	}
 
+void C4GamePadControl::DoAxisInput()
+	{
+	// Send axis strength changes
+	Execute(true);
+	}
+
+
 bool C4GamePadControl::AnyButtonDown()
 	{
 	return false;

src/platform/C4GamePadCon.h

@@ -48,10 +48,13 @@ class C4GamePadControl {
 			int iRefCount;
 			uint32_t Buttons;
 			CStdGamePad::AxisPos AxisPosis[CStdGamepad_MaxAxis];
+			int32_t AxisStrengths[CStdGamepad_MaxAxis];
 			};
 		Pad Gamepads[CStdGamepad_MaxGamePad];
 		int iNumGamepads;
 
+		enum { AxisStrengthChangeThreshold = 2 }; // if axis strength change > this value, a new control is issued
+
 	public:
 		void OpenGamepad(int id);  // add gamepad ref
 		void CloseGamepad(int id); // del gamepad ref
@@ -67,7 +70,8 @@ class C4GamePadControl {
 		~C4GamePadControl();
 		void Clear();
 		int GetGamePadCount();
-		void Execute();
+		void Execute(bool send_axis_strength_changes=false);
+		void DoAxisInput(); // period axis strength update controls sent on each control frame creation
 		static bool AnyButtonDown();
 };