BGE: Adding a Python interface for handling joysticks without needing logic bricks. These new SCA_PythonJoystick objects can be accessed using bge.logic.joysticks, which is a list of joysticks. The length of the list is the number of maximum supported joysticks, and indexes that do not have a joystick available are set to None. This means joysticks can be checked for using something like:
if bge.logic.joysticks[0]:
activate_player_one()
if bge.logic.joysticks[1]:
activate_player_two()
etc..
The interface exposed by SCA_PythonJoystick is very similar to the joystick logic brick except for one key difference: axis values are normalized to a -1.0 to 1.0 range instead of -32767 to 32767, which is what the logic brick exposed.
This commit is contained in:
184
source/gameengine/GameLogic/SCA_PythonJoystick.cpp
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184
source/gameengine/GameLogic/SCA_PythonJoystick.cpp
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/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor(s): Mitchell Stokes.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file gameengine/GameLogic/SCA_PythonJoystick.cpp
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* \ingroup gamelogic
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*/
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#include "SCA_PythonJoystick.h"
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#include "./Joystick/SCA_Joystick.h"
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#include "SCA_IInputDevice.h"
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//#include "GHOST_C-api.h"
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/* ------------------------------------------------------------------------- */
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/* Native functions */
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/* ------------------------------------------------------------------------- */
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SCA_PythonJoystick::SCA_PythonJoystick(SCA_Joystick* joystick)
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: PyObjectPlus(),
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m_joystick(joystick)
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{
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#ifdef WITH_PYTHON
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m_event_dict = PyDict_New();
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#endif
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}
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SCA_PythonJoystick::~SCA_PythonJoystick()
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{
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#ifdef WITH_PYTHON
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PyDict_Clear(m_event_dict);
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Py_DECREF(m_event_dict);
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#endif
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}
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#ifdef WITH_PYTHON
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/* ------------------------------------------------------------------------- */
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/* Python functions */
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/* ------------------------------------------------------------------------- */
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PyObject* SCA_PythonJoystick::py_repr(void)
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{
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return PyUnicode_FromString(m_joystick->GetName());
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}
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/* Integration hooks ------------------------------------------------------- */
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PyTypeObject SCA_PythonJoystick::Type = {
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PyVarObject_HEAD_INIT(NULL, 0)
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"SCA_PythonJoystick",
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sizeof(PyObjectPlus_Proxy),
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0,
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py_base_dealloc,
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0,
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0,
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0,
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0,
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py_base_repr,
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0,0,0,0,0,0,0,0,0,
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Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
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0,0,0,0,0,0,0,
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Methods,
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0,
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0,
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&PyObjectPlus::Type,
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0,0,0,0,0,0,
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py_base_new
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};
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PyMethodDef SCA_PythonJoystick::Methods[] = {
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{NULL,NULL} //Sentinel
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};
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PyAttributeDef SCA_PythonJoystick::Attributes[] = {
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KX_PYATTRIBUTE_RO_FUNCTION("numButtons", SCA_PythonJoystick, pyattr_get_num_x),
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KX_PYATTRIBUTE_RO_FUNCTION("numHats", SCA_PythonJoystick, pyattr_get_num_x),
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KX_PYATTRIBUTE_RO_FUNCTION("numAxis", SCA_PythonJoystick, pyattr_get_num_x),
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KX_PYATTRIBUTE_RO_FUNCTION("activeButtons", SCA_PythonJoystick, pyattr_get_active_buttons),
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KX_PYATTRIBUTE_RO_FUNCTION("hatValues", SCA_PythonJoystick, pyattr_get_hat_values),
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KX_PYATTRIBUTE_RO_FUNCTION("axisValues", SCA_PythonJoystick, pyattr_get_axis_values),
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KX_PYATTRIBUTE_RO_FUNCTION("name", SCA_PythonJoystick, pyattr_get_name),
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{ NULL } //Sentinel
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};
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// Use one function for numAxis, numButtons, and numHats
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PyObject* SCA_PythonJoystick::pyattr_get_num_x(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
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{
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SCA_PythonJoystick* self = static_cast<SCA_PythonJoystick*>(self_v);
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if (strcmp(attrdef->m_name, "numButtons") == 0)
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return PyLong_FromLong(self->m_joystick->GetNumberOfButtons());
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else if (strcmp(attrdef->m_name, "numAxis") == 0)
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return PyLong_FromLong(self->m_joystick->GetNumberOfAxes());
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else if (strcmp(attrdef->m_name, "numHats") == 0)
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return PyLong_FromLong(self->m_joystick->GetNumberOfHats());
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// If we got here, we have a problem...
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PyErr_SetString(PyExc_AttributeError, "invalid attribute");
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return NULL;
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}
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PyObject* SCA_PythonJoystick::pyattr_get_active_buttons(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
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{
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SCA_PythonJoystick* self = static_cast<SCA_PythonJoystick*>(self_v);
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int button_index = self->m_joystick->GetNumberOfButtons();
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PyObject *list = PyList_New(0);
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PyObject *value;
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for (int i=0; i < self->m_joystick->GetNumberOfButtons(); i++) {
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if (self->m_joystick->aButtonPressIsPositive(i)) {
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value = PyLong_FromSsize_t(i);
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PyList_Append(list, value);
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Py_DECREF(value);
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}
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}
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return list;
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}
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PyObject* SCA_PythonJoystick::pyattr_get_hat_values(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
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{
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SCA_PythonJoystick* self = static_cast<SCA_PythonJoystick*>(self_v);
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int hat_index = self->m_joystick->GetNumberOfHats();
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PyObject *list = PyList_New(hat_index);
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while (hat_index--) {
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PyList_SET_ITEM(list, hat_index, PyLong_FromLong(self->m_joystick->GetHat(hat_index)));
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}
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return list;
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}
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PyObject* SCA_PythonJoystick::pyattr_get_axis_values(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
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{
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SCA_PythonJoystick* self = static_cast<SCA_PythonJoystick*>(self_v);
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int axis_index = self->m_joystick->GetNumberOfAxes();
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PyObject *list = PyList_New(axis_index);
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int position;
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while (axis_index--) {
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position = self->m_joystick->GetAxisPosition(axis_index);
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// We get back a range from -32768 to 32767, so we use an if here to
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// get a perfect -1.0 to 1.0 mapping. Some oddball system might have an
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// actual min of -32767 for shorts, so we use SHRT_MIN/MAX to be safe.
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if (position < 0)
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PyList_SET_ITEM(list, axis_index, PyFloat_FromDouble(position/((double)-SHRT_MIN)));
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else
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PyList_SET_ITEM(list, axis_index, PyFloat_FromDouble(position/(double)SHRT_MAX));
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}
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return list;
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}
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PyObject* SCA_PythonJoystick::pyattr_get_name(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
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{
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SCA_PythonJoystick* self = static_cast<SCA_PythonJoystick*>(self_v);
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return PyUnicode_FromString(self->m_joystick->GetName());
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}
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#endif
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