Make camera movement independant of framerate (#4247)

Instead of moving camera with constant speed per frame, speed is multiplied with delta time before movement.

src/rcamera.h

@@ -196,12 +196,12 @@ RLAPI Matrix GetCameraProjectionMatrix(Camera* camera, float aspect);
 //----------------------------------------------------------------------------------
 // Defines and Macros
 //----------------------------------------------------------------------------------
-#define CAMERA_MOVE_SPEED                               0.09f
+#define CAMERA_MOVE_SPEED                               5.4f       // Units per second
 #define CAMERA_ROTATION_SPEED                           0.03f
 #define CAMERA_PAN_SPEED                                0.2f
 
 // Camera mouse movement sensitivity
-#define CAMERA_MOUSE_MOVE_SENSITIVITY                   0.003f     // TODO: it should be independant of framerate
+#define CAMERA_MOUSE_MOVE_SENSITIVITY                   0.003f
 
 // Camera orbital speed in CAMERA_ORBITAL mode
 #define CAMERA_ORBITAL_SPEED                            0.5f       // Radians per second
@@ -481,10 +481,11 @@ void UpdateCamera(Camera *camera, int mode)
         }
 
         // Keyboard support
-        if (IsKeyDown(KEY_W)) CameraMoveForward(camera, CAMERA_MOVE_SPEED, moveInWorldPlane);
-        if (IsKeyDown(KEY_A)) CameraMoveRight(camera, -CAMERA_MOVE_SPEED, moveInWorldPlane);
-        if (IsKeyDown(KEY_S)) CameraMoveForward(camera, -CAMERA_MOVE_SPEED, moveInWorldPlane);
-        if (IsKeyDown(KEY_D)) CameraMoveRight(camera, CAMERA_MOVE_SPEED, moveInWorldPlane);
+        float cameraMoveSpeed = CAMERA_MOVE_SPEED*GetFrameTime();
+        if (IsKeyDown(KEY_W)) CameraMoveForward(camera, cameraMoveSpeed, moveInWorldPlane);
+        if (IsKeyDown(KEY_A)) CameraMoveRight(camera, -cameraMoveSpeed, moveInWorldPlane);
+        if (IsKeyDown(KEY_S)) CameraMoveForward(camera, -cameraMoveSpeed, moveInWorldPlane);
+        if (IsKeyDown(KEY_D)) CameraMoveRight(camera, cameraMoveSpeed, moveInWorldPlane);
 
         // Gamepad movement
         if (IsGamepadAvailable(0))
@@ -493,16 +494,16 @@ void UpdateCamera(Camera *camera, int mode)
             CameraYaw(camera, -(GetGamepadAxisMovement(0, GAMEPAD_AXIS_RIGHT_X)*2)*CAMERA_MOUSE_MOVE_SENSITIVITY, rotateAroundTarget);
             CameraPitch(camera, -(GetGamepadAxisMovement(0, GAMEPAD_AXIS_RIGHT_Y)*2)*CAMERA_MOUSE_MOVE_SENSITIVITY, lockView, rotateAroundTarget, rotateUp);
 
-            if (GetGamepadAxisMovement(0, GAMEPAD_AXIS_LEFT_Y) <= -0.25f) CameraMoveForward(camera, CAMERA_MOVE_SPEED, moveInWorldPlane);
-            if (GetGamepadAxisMovement(0, GAMEPAD_AXIS_LEFT_X) <= -0.25f) CameraMoveRight(camera, -CAMERA_MOVE_SPEED, moveInWorldPlane);
-            if (GetGamepadAxisMovement(0, GAMEPAD_AXIS_LEFT_Y) >= 0.25f) CameraMoveForward(camera, -CAMERA_MOVE_SPEED, moveInWorldPlane);
-            if (GetGamepadAxisMovement(0, GAMEPAD_AXIS_LEFT_X) >= 0.25f) CameraMoveRight(camera, CAMERA_MOVE_SPEED, moveInWorldPlane);
+            if (GetGamepadAxisMovement(0, GAMEPAD_AXIS_LEFT_Y) <= -0.25f) CameraMoveForward(camera, cameraMoveSpeed, moveInWorldPlane);
+            if (GetGamepadAxisMovement(0, GAMEPAD_AXIS_LEFT_X) <= -0.25f) CameraMoveRight(camera, -cameraMoveSpeed, moveInWorldPlane);
+            if (GetGamepadAxisMovement(0, GAMEPAD_AXIS_LEFT_Y) >= 0.25f) CameraMoveForward(camera, -cameraMoveSpeed, moveInWorldPlane);
+            if (GetGamepadAxisMovement(0, GAMEPAD_AXIS_LEFT_X) >= 0.25f) CameraMoveRight(camera, cameraMoveSpeed, moveInWorldPlane);
         }
 
         if (mode == CAMERA_FREE)
         {
-            if (IsKeyDown(KEY_SPACE)) CameraMoveUp(camera, CAMERA_MOVE_SPEED);
-            if (IsKeyDown(KEY_LEFT_CONTROL)) CameraMoveUp(camera, -CAMERA_MOVE_SPEED);
+            if (IsKeyDown(KEY_SPACE)) CameraMoveUp(camera, cameraMoveSpeed);
+            if (IsKeyDown(KEY_LEFT_CONTROL)) CameraMoveUp(camera, -cameraMoveSpeed);
         }
     }