[examples] Add deadzone handling to `core_input_gamepad` example (#4422)

* Add deadzone handling to core_input_gamepad example

* Rename variables

examples/core/core_input_gamepad.c

@@ -41,6 +41,14 @@ int main(void)
     Texture2D texPs3Pad = LoadTexture("resources/ps3.png");
     Texture2D texXboxPad = LoadTexture("resources/xbox.png");
 
+    // Set axis deadzones
+    const float leftStickDeadzoneX = 0.1f;
+    const float leftStickDeadzoneY = 0.1f;
+    const float rightStickDeadzoneX = 0.1f;
+    const float rightStickDeadzoneY = 0.1f;
+    const float leftTriggerDeadzone = -0.9f;
+    const float rightTriggerDeadzone = -0.9f;
+
     SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
     //--------------------------------------------------------------------------------------
 
@@ -67,6 +75,22 @@ int main(void)
             {
                 DrawText(TextFormat("GP%d: %s", gamepad, GetGamepadName(gamepad)), 10, 10, 10, BLACK);
 
+                // Get axis values
+                float leftStickX = GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_X);
+                float leftStickY = GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_Y);
+                float rightStickX = GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_X);
+                float rightStickY = GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_Y);
+                float leftTrigger = GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_TRIGGER);
+                float rightTrigger = GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_TRIGGER);
+
+                // Calculate deadzones
+                if (leftStickX > -leftStickDeadzoneX && leftStickX < leftStickDeadzoneX) leftStickX = 0.0f;
+                if (leftStickY > -leftStickDeadzoneY && leftStickY < leftStickDeadzoneY) leftStickY = 0.0f;
+                if (rightStickX > -rightStickDeadzoneX && rightStickX < rightStickDeadzoneX) rightStickX = 0.0f;
+                if (rightStickY > -rightStickDeadzoneY && rightStickY < rightStickDeadzoneY) rightStickY = 0.0f;
+                if (leftTrigger < leftTriggerDeadzone) leftTrigger = -1.0f;
+                if (rightTrigger < rightTriggerDeadzone) rightTrigger = -1.0f;
+
                 if (TextFindIndex(TextToLower(GetGamepadName(gamepad)), XBOX_ALIAS_1) > -1 || TextFindIndex(TextToLower(GetGamepadName(gamepad)), XBOX_ALIAS_2) > -1)
                 {
                     DrawTexture(texXboxPad, 0, 0, DARKGRAY);
@@ -100,22 +124,22 @@ int main(void)
                     if (IsGamepadButtonDown(gamepad, GAMEPAD_BUTTON_LEFT_THUMB)) leftGamepadColor = RED;
                     DrawCircle(259, 152, 39, BLACK);
                     DrawCircle(259, 152, 34, LIGHTGRAY);
-                    DrawCircle(259 + (int)(GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_X)*20),
-                               152 + (int)(GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_Y)*20), 25, leftGamepadColor);
+                    DrawCircle(259 + (int)(leftStickX*20),
+                               152 + (int)(leftStickY*20), 25, leftGamepadColor);
 
                     // Draw axis: right joystick
                     Color rightGamepadColor = BLACK;
                     if (IsGamepadButtonDown(gamepad, GAMEPAD_BUTTON_RIGHT_THUMB)) rightGamepadColor = RED;
                     DrawCircle(461, 237, 38, BLACK);
                     DrawCircle(461, 237, 33, LIGHTGRAY);
-                    DrawCircle(461 + (int)(GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_X)*20),
-                               237 + (int)(GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_Y)*20), 25, rightGamepadColor);
+                    DrawCircle(461 + (int)(rightStickX*20),
+                               237 + (int)(rightStickY*20), 25, rightGamepadColor);
 
                     // Draw axis: left-right triggers
                     DrawRectangle(170, 30, 15, 70, GRAY);
                     DrawRectangle(604, 30, 15, 70, GRAY);
-                    DrawRectangle(170, 30, 15, (int)(((1 + GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_TRIGGER))/2)*70), RED);
-                    DrawRectangle(604, 30, 15, (int)(((1 + GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_TRIGGER))/2)*70), RED);
+                    DrawRectangle(170, 30, 15, (int)(((1 + leftTrigger)/2)*70), RED);
+                    DrawRectangle(604, 30, 15, (int)(((1 + rightTrigger)/2)*70), RED);
 
                     //DrawText(TextFormat("Xbox axis LT: %02.02f", GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_TRIGGER)), 10, 40, 10, BLACK);
                     //DrawText(TextFormat("Xbox axis RT: %02.02f", GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_TRIGGER)), 10, 60, 10, BLACK);
@@ -150,24 +174,24 @@ int main(void)
                     // Draw axis: left joystick
                     Color leftGamepadColor = BLACK;
                     if (IsGamepadButtonDown(gamepad, GAMEPAD_BUTTON_LEFT_THUMB)) leftGamepadColor = RED;
-                    DrawCircle(319, 255, 35, leftGamepadColor);
+                    DrawCircle(319, 255, 35, BLACK);
                     DrawCircle(319, 255, 31, LIGHTGRAY);
-                    DrawCircle(319 + (int)(GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_X) * 20),
-                               255 + (int)(GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_Y) * 20), 25, leftGamepadColor);
+                    DrawCircle(319 + (int)(leftStickX*20),
+                               255 + (int)(leftStickY*20), 25, leftGamepadColor);
 
                     // Draw axis: right joystick
                     Color rightGamepadColor = BLACK;
                     if (IsGamepadButtonDown(gamepad, GAMEPAD_BUTTON_RIGHT_THUMB)) rightGamepadColor = RED;
                     DrawCircle(475, 255, 35, BLACK);
                     DrawCircle(475, 255, 31, LIGHTGRAY);
-                    DrawCircle(475 + (int)(GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_X) * 20),
-                               255 + (int)(GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_Y) * 20), 25, rightGamepadColor);
+                    DrawCircle(475 + (int)(rightStickX*20),
+                               255 + (int)(rightStickY*20), 25, rightGamepadColor);
 
                     // Draw axis: left-right triggers
                     DrawRectangle(169, 48, 15, 70, GRAY);
                     DrawRectangle(611, 48, 15, 70, GRAY);
-                    DrawRectangle(169, 48, 15, (int)(((1 - GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_LEFT_TRIGGER)) / 2) * 70), RED);
-                    DrawRectangle(611, 48, 15, (int)(((1 - GetGamepadAxisMovement(gamepad, GAMEPAD_AXIS_RIGHT_TRIGGER)) / 2) * 70), RED);
+                    DrawRectangle(169, 48, 15, (int)(((1 + leftTrigger)/2)*70), RED);
+                    DrawRectangle(611, 48, 15, (int)(((1 + rightTrigger)/2)*70), RED);
                 }
                 else
                 {