Method get_axis_value

win32/WinController.cpp:814–978

note controller is index into ControlList.

//	note controller is index into ControlList.
float gameWinController::get_axis_value(int8_t controller, uint8_t axis, ct_format format, bool invert) {
  if (controller <= NULL_WINCONTROLLER || controller >= CT_MAX_CONTROLLERS)
    return 0.0f;

  struct gameWinController::t_controller *ctldev = &m_ControlList[controller];
  if (ctldev->id == CTID_INVALID)
    return 0.0f;

#ifdef _DEBUG
  if (m_ControlList[controller].id == CTID_KEYBOARD) {
    Int3();
    return 0.0f;
  }
#endif

  //	verify controller axis
  const int axisIndex = axis - 1;
  if (!CHECK_FLAG(ctldev->flags, 1 << axisIndex))
    return 0.0f;

  //	get raw value
  float axisval = 0.0f;
  switch (axis) {
  //	note we take care of mouse controls and external controls here
  case CT_X_AXIS:
    axisval = (float)((ctldev->id == CTID_MOUSE) ? m_MseState.m_deltaX : m_ExtCtlStates[ctldev->id].x);
    break;
  case CT_Y_AXIS:
    axisval = (float)((ctldev->id == CTID_MOUSE) ? m_MseState.m_deltaY : m_ExtCtlStates[ctldev->id].y);
    break;
  case CT_Z_AXIS:
    axisval = (float)((ctldev->id == CTID_MOUSE) ? m_MseState.m_deltaZ : m_ExtCtlStates[ctldev->id].z);
    break;
  case CT_R_AXIS:
    axisval = (float)m_ExtCtlStates[ctldev->id].r;
    break;
  case CT_U_AXIS:
    axisval = (float)m_ExtCtlStates[ctldev->id].u;
    break;
  case CT_V_AXIS:
    axisval = (float)m_ExtCtlStates[ctldev->id].v;
    break;
  default:
    Int3(); // NOT A VALID AXIS
  }

  // create normalizer
  float normalizer, nullzone;
  if (ctldev->id == CTID_MOUSE) {
    const float kMinFrameTime = 0.000001f;
    if (m_frame_time < kMinFrameTime) {
      m_frame_time = kMinFrameTime;
    }

    normalizer = ctldev->normalizer[axisIndex] * m_frame_time;
    nullzone = MOUSE_DEADZONE;
  } else {
    // really small deadzones will not take joystick drift into account, hence your mouse control will be cancelled out.