Improved gamepad support

Now it works ok also in RaspberryPi

src/core.c

@@ -127,6 +127,7 @@
 
     #define MOUSE_SENSITIVITY         0.8f
     #define MAX_GAMEPAD_BUTTONS       11
+    #define MAX_GAMEPAD_AXIS          5
 #endif
 
 //----------------------------------------------------------------------------------
@@ -168,8 +169,7 @@ static bool gamepadReady = false;               // Flag to know if gamepad is re
 pthread_t gamepadThreadId;                      // Gamepad reading thread id
 
 int gamepadButtons[MAX_GAMEPAD_BUTTONS];
-int gamepadAxisX = 0;
-int gamepadAxisY = 0;
+float gamepadAxisValues[MAX_GAMEPAD_AXIS];
 #endif
 
 #if defined(PLATFORM_ANDROID) || defined(PLATFORM_RPI)
@@ -1177,30 +1177,22 @@ bool IsGamepadAvailable(int gamepad)
 }
 
 // Return axis movement vector for a gamepad
-Vector2 GetGamepadMovement(int gamepad)
+float GetGamepadAxisMovement(int gamepad, int axis)
 {
-    Vector2 vec = { 0, 0 };
-
-    const float *axes;
-    int axisCount = 0;
+    float value = 0;
 
 #if defined(PLATFORM_RPI)
-    // TODO: Get gamepad axis information
-    // Use gamepadAxisX, gamepadAxisY
+    if (axis < MAX_GAMEPAD_AXIS) value = gamepadAxisValues[axis];
 #else
+    const float *axes;
+    int axisCount = 0;
+
     axes = glfwGetJoystickAxes(gamepad, &axisCount);
-#endif
 
-    if (axisCount >= 2)
-    {
-        vec.x = axes[0];    // Left joystick X
-        vec.y = axes[1];    // Left joystick Y
-
-        //vec.x = axes[2];    // Right joystick X
-        //vec.x = axes[3];    // Right joystick Y
-    }
+    if (axis < axisCount) value = axes[axis];
+#endif
 
-    return vec;
+    return value;
 }
 
 // Detect if a gamepad button has been pressed once
@@ -2484,10 +2476,6 @@ static void *GamepadThread(void *arg)
         unsigned char number;   // event axis/button number
     };
 
-    // These values are sensible on Logitech Dual Action Rumble and Xbox360 controller
-    const int joystickAxisX = 0;
-    const int joystickAxisY = 1;
-
     // Read gamepad event
 	struct js_event gamepadEvent;
 
@@ -2512,17 +2500,11 @@ static void *GamepadThread(void *arg)
             {
                 TraceLog(DEBUG, "Gamepad axis: %i, value: %i", gamepadEvent.number, gamepadEvent.value);
 
-                if (gamepadEvent.number == joystickAxisX) gamepadAxisX = (int)gamepadEvent.value;
-                if (gamepadEvent.number == joystickAxisY) gamepadAxisY = (int)gamepadEvent.value;
-                /*
-                switch (gamepadEvent.number)
+                if (gamepadEvent.number < MAX_GAMEPAD_AXIS)
                 {
-                    case 0: // 1st Axis X
-                    case 1: // 1st Axis Y
-                    case 2: // 2st Axis X
-                    case 3: // 2st Axis Y
+                    // NOTE: Scaling of gamepadEvent.value to get values between -1..1
+                    gamepadAxisValues[gamepadEvent.number] = (float)gamepadEvent.value/32768;
                 }
-                */
             }
         }
 	}

src/raylib.h

@@ -190,7 +190,35 @@
 #define GAMEPAD_BUTTON_SELECT   9
 #define GAMEPAD_BUTTON_START   10
 
-// TODO: Review Xbox360 USB Controller Buttons
+// Xbox360 USB Controller Buttons
+#define GAMEPAD_XBOX_BUTTON_A       0
+#define GAMEPAD_XBOX_BUTTON_B       1
+#define GAMEPAD_XBOX_BUTTON_X       2
+#define GAMEPAD_XBOX_BUTTON_Y       3
+#define GAMEPAD_XBOX_BUTTON_LB      4
+#define GAMEPAD_XBOX_BUTTON_RB      5
+#define GAMEPAD_XBOX_BUTTON_SELECT  6
+#define GAMEPAD_XBOX_BUTTON_START   7
+
+#if defined(PLATFORM_RPI)
+    #define GAMEPAD_XBOX_AXIS_DPAD_X    32
+    #define GAMEPAD_XBOX_AXIS_DPAD_Y    64
+    #define GAMEPAD_XBOX_AXIS_RIGHT_X   3
+    #define GAMEPAD_XBOX_AXIS_RIGHT_Y   4
+    #define GAMEPAD_XBOX_AXIS_LT        2
+    #define GAMEPAD_XBOX_AXIS_RT        5
+#else
+    #define GAMEPAD_XBOX_BUTTON_UP      10
+    #define GAMEPAD_XBOX_BUTTON_DOWN    12
+    #define GAMEPAD_XBOX_BUTTON_LEFT    13
+    #define GAMEPAD_XBOX_BUTTON_RIGHT   11
+    #define GAMEPAD_XBOX_AXIS_RIGHT_X   4
+    #define GAMEPAD_XBOX_AXIS_RIGHT_Y   3
+    #define GAMEPAD_XBOX_AXIS_LT_RT     2
+#endif
+
+#define GAMEPAD_XBOX_AXIS_LEFT_X    0
+#define GAMEPAD_XBOX_AXIS_LEFT_Y    1
 
 // Android Physic Buttons
 #define ANDROID_BACK            4
@@ -592,7 +620,7 @@ void DisableCursor(void);                               // Disables cursor
 bool IsCursorHidden(void);                              // Returns true if cursor is not visible
 
 bool IsGamepadAvailable(int gamepad);                   // Detect if a gamepad is available
-Vector2 GetGamepadMovement(int gamepad);                // Return axis movement vector for a gamepad
+float GetGamepadAxisMovement(int gamepad, int axis);    // Return axis movement value for a gamepad axis
 bool IsGamepadButtonPressed(int gamepad, int button);   // Detect if a gamepad button has been pressed once
 bool IsGamepadButtonDown(int gamepad, int button);      // Detect if a gamepad button is being pressed
 bool IsGamepadButtonReleased(int gamepad, int button);  // Detect if a gamepad button has been released once