Method get_axis_value

linux/lnxcontroller.cpp:1111–1278

note controller is index into ControlList.

//	note controller is index into ControlList.
float lnxgameController::get_axis_value(int8_t controller, uint8_t axis, ct_format format, bool invert) {
  struct lnxgameController::t_controller *ctldev;
  float val = (float)0.0;
  float normalizer, axisval = 0, nullzone; //, senszone;

  if (controller <= NULL_LNXCONTROLLER || controller >= CT_MAX_CONTROLLERS) {
    return 0.0f;
  }

  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
  if (!CHECK_FLAG(ctldev->flags, 1 << (axis - 1))) {
    return val;
  }

  //	get raw value
  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.x : m_ExtCtlStates[ctldev->id].x);
    break;
  case CT_Y_AXIS:
    axisval = (float)((ctldev->id == CTID_MOUSE) ? m_MseState.y : m_ExtCtlStates[ctldev->id].y);
    break;
  case CT_Z_AXIS:
    axisval = (float)((ctldev->id == CTID_MOUSE) ? m_MseState.z : 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
  axis--;
  if (ctldev->id == CTID_MOUSE) {
    if (m_frame_time < 0.005f)
      m_frame_time = 0.005f; // to trap potential errors.
    normalizer = ctldev->normalizer[axis] * m_frame_time;
    nullzone = MOUSE_DEADZONE;