206 lines
6.1 KiB
C++
206 lines
6.1 KiB
C++
/**
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* Generate random pulses
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*
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* $Id$
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*
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* ***** BEGIN GPL/BL DUAL 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. The Blender
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* Foundation also sells licenses for use in proprietary software under
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* the Blender License. See http://www.blender.org/BL/ for information
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* about this.
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL/BL DUAL LICENSE BLOCK *****
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*/
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#include "SCA_RandomSensor.h"
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#include "SCA_EventManager.h"
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#include "SCA_RandomEventManager.h"
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#include "SCA_LogicManager.h"
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#include "ConstExpr.h"
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#include <iostream>
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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/* ------------------------------------------------------------------------- */
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/* Native functions */
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/* ------------------------------------------------------------------------- */
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SCA_RandomSensor::SCA_RandomSensor(SCA_EventManager* eventmgr,
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SCA_IObject* gameobj,
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int startseed,
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PyTypeObject* T)
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: SCA_ISensor(gameobj,eventmgr, T)
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{
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m_iteration = 0;
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m_interval = 0;
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m_lastdraw = false;
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// m_basegenerator is never deleted => memory leak
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m_basegenerator = new SCA_RandomNumberGenerator(startseed);
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m_currentDraw = m_basegenerator->Draw();
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//registration is done globally, don't do it here
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//Note: it was probably done to work around a bug in Evaluate(). It is now fixed
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//RegisterToManager();
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}
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SCA_RandomSensor::~SCA_RandomSensor()
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{
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/* Nothing to be done here. */
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}
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CValue* SCA_RandomSensor::GetReplica()
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{
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CValue* replica = new SCA_RandomSensor(*this);
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// replication copies m_basegenerator pointer => share same generator
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// this will copy properties and so on...
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CValue::AddDataToReplica(replica);
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return replica;
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}
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bool SCA_RandomSensor::IsPositiveTrigger()
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{
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return (m_invert !=m_lastdraw);
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}
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bool SCA_RandomSensor::Evaluate(CValue* event)
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{
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/* Random generator is the generator from Line 25 of Table 1 in */
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/* [KNUTH 1981, The Art of Computer Programming Vol. 2 */
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/* (2nd Ed.), pp102] */
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/* It's a very simple max. length sequence generator. We can */
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/* draw 32 bool values before having to generate the next */
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/* sequence value. There are some theorems that will tell you */
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/* this is a reasonable way of generating bools. Check Knuth. */
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/* Furthermore, we only draw each <delay>-eth frame. */
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bool evaluateResult = false;
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if (++m_interval > m_pulse_frequency) {
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bool drawResult = false;
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m_interval = 0;
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if (m_iteration > 31) {
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m_currentDraw = m_basegenerator->Draw();
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drawResult = (m_currentDraw & 0x1) == 0;
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m_iteration = 1;
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} else {
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drawResult = ((m_currentDraw >> m_iteration) & 0x1) == 0;
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m_iteration++;
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}
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evaluateResult = drawResult != m_lastdraw;
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m_lastdraw = drawResult;
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}
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/* now pass this result to some controller */
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return evaluateResult;
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}
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/* ------------------------------------------------------------------------- */
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/* Python functions */
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/* ------------------------------------------------------------------------- */
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/* Integration hooks ------------------------------------------------------- */
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PyTypeObject SCA_RandomSensor::Type = {
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PyObject_HEAD_INIT(&PyType_Type)
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0,
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"SCA_RandomSensor",
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sizeof(SCA_RandomSensor),
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0,
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PyDestructor,
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0,
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__getattr,
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__setattr,
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0, //&MyPyCompare,
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__repr,
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0, //&cvalue_as_number,
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0,
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0,
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0,
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0
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};
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PyParentObject SCA_RandomSensor::Parents[] = {
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&SCA_RandomSensor::Type,
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&SCA_ISensor::Type,
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&SCA_ILogicBrick::Type,
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&CValue::Type,
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NULL
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};
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PyMethodDef SCA_RandomSensor::Methods[] = {
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{"setSeed", (PyCFunction) SCA_RandomSensor::sPySetSeed, METH_VARARGS, SetSeed_doc},
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{"getSeed", (PyCFunction) SCA_RandomSensor::sPyGetSeed, METH_VARARGS, GetSeed_doc},
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{"getLastDraw", (PyCFunction) SCA_RandomSensor::sPyGetLastDraw, METH_VARARGS, GetLastDraw_doc},
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{NULL,NULL} //Sentinel
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};
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PyObject* SCA_RandomSensor::_getattr(const STR_String& attr) {
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_getattr_up(SCA_ISensor);
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}
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/* 1. setSeed */
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char SCA_RandomSensor::SetSeed_doc[] =
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"setSeed(seed)\n"
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"\t- seed: integer\n"
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"\tSet the initial seed of the generator. Equal seeds produce\n"
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"\tequal series. If the seed is 0, the generator will produce\n"
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"\tthe same value on every call.\n";
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PyObject* SCA_RandomSensor::PySetSeed(PyObject* self, PyObject* args, PyObject* kwds) {
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long seedArg;
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if(!PyArg_ParseTuple(args, "i", &seedArg)) {
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return NULL;
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}
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m_basegenerator->SetSeed(seedArg);
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Py_Return;
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}
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/* 2. getSeed */
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char SCA_RandomSensor::GetSeed_doc[] =
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"getSeed()\n"
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"\tReturns the initial seed of the generator. Equal seeds produce\n"
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"\tequal series.\n";
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PyObject* SCA_RandomSensor::PyGetSeed(PyObject* self, PyObject* args, PyObject* kwds) {
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return PyInt_FromLong(m_basegenerator->GetSeed());
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}
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/* 3. getLastDraw */
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char SCA_RandomSensor::GetLastDraw_doc[] =
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"getLastDraw()\n"
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"\tReturn the last value that was drawn.\n";
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PyObject* SCA_RandomSensor::PyGetLastDraw(PyObject* self, PyObject* args, PyObject* kwds) {
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return PyInt_FromLong(m_lastdraw);
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}
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/* eof */
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