--- /dev/null
+/**
+ * @file precipitation_mgr.cxx
+ * @author Nicolas VIVIEN
+ * @date 2008-02-10
+ *
+ * @note Copyright (C) 2008 Nicolas VIVIEN
+ *
+ * @brief Precipitation manager
+ * This manager calculate the intensity of precipitation in function of the altitude,
+ * calculate the wind direction and velocity, then update the drawing of precipitation.
+ *
+ * @par Licences
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * @par CVS
+ * $Id$
+ */
+
+#include <osgDB/ReadFile>
+#include <osgDB/FileUtils>
+#include <osgUtil/Optimizer>
+#include <osgUtil/CullVisitor>
+#include <osgViewer/Viewer>
+
+#include <osg/Depth>
+#include <osg/Stencil>
+#include <osg/ClipPlane>
+#include <osg/ClipNode>
+#include <osg/MatrixTransform>
+#include <osgUtil/TransformCallback>
+
+#include <simgear/constants.h>
+#include <simgear/scene/sky/sky.hxx>
+#include <simgear/scene/sky/cloud.hxx>
+
+#include <Main/fg_props.hxx>
+
+#include "precipitation_mgr.hxx"
+
+
+extern SGSky *thesky;
+
+
+void WorldCoordinate( osg::Matrix&, double,
+ double, double, double);
+
+/**
+ * @brief FGPrecipitation Manager constructor
+ *
+ * Build a new object to manage the precipitation object
+ */
+FGPrecipitationMgr::FGPrecipitationMgr()
+{
+ osg::Matrix position;
+ double latitude, longitude;
+
+
+ group = new osg::Group();
+ transform = new osg::MatrixTransform();
+ precipitation = new SGPrecipitation();
+
+
+ // By default, none precipitation
+ precipitation->setRainIntensity(0);
+ precipitation->setSnowIntensity(0);
+
+
+ // Read latitude and longitude position
+ latitude = fgGetDouble("/position/latitude-deg", 0.0);
+ longitude = fgGetDouble("/position/longitude-deg", 0.0);
+
+ WorldCoordinate(position, latitude, longitude, 0, 0);
+
+
+ // Move the precipitation object to player position
+ transform->setMatrix(position);
+ transform->addChild(precipitation->build());
+
+ group->addChild(transform);
+}
+
+
+/**
+ * @brief FGPrecipitaiton Manager destructor
+ */
+FGPrecipitationMgr::~FGPrecipitationMgr()
+{
+ delete precipitation;
+}
+
+
+/**
+ * @brief Get OSG precipitation object
+ *
+ * @returns A pointer on the OSG object (osg::Group *)
+ */
+osg::Group * FGPrecipitationMgr::getObject(void)
+{
+ return this->group;
+}
+
+
+/**
+ * @brief Calculate the max alitutude with precipitation
+ *
+ * @returns Elevation max in meter
+ *
+ * This function permits you to know what is the altitude max where we can
+ * find precipitation. The value is returned in meter.
+ */
+float FGPrecipitationMgr::getPrecipitationAtAltitudeMax(void)
+{
+ int i;
+ int max;
+ float result;
+
+
+ // By default (not cloud layer)
+ max = SGCloudLayer::SG_MAX_CLOUD_COVERAGES;
+ result = 0;
+
+ // To avoid messing up
+ if (thesky == NULL)
+ return result;
+
+ // For each cloud layer
+ for (i=0; i<thesky->get_cloud_layer_count(); i++) {
+ int q;
+
+ // Get coverage
+ // Value for q are (meaning / thickness) :
+ // 5 : "clear" / 0
+ // 4 : "cirrus" / ??
+ // 3 : "few" / 65
+ // 2 : "scattered" / 600
+ // 1 : "broken" / 750
+ // 0 : "overcast" / 1000
+ q = thesky->get_cloud_layer(i)->getCoverage();
+
+ // Save the coverage max
+ if (q < max) {
+ max = q;
+ result = thesky->get_cloud_layer(i)->getElevation_m();
+ }
+ }
+
+ return result;
+}
+
+
+/**
+ * @brief Update the precipitation drawing
+ *
+ * @returns true is all is OK
+ *
+ * This function permits you to update the precipitation drawing.
+ * This function is called by the renderer.
+ */
+bool FGPrecipitationMgr::update(void)
+{
+ double dewtemp;
+ double currtemp;
+ double rain_intensity;
+ double snow_intensity;
+
+ float altitudeAircraft;
+ float altitudeCloudLayer;
+
+ // Get the elevation of aicraft and of the cloud layer
+ altitudeAircraft = fgGetDouble("/position/altitude-ft", 0.0);
+ altitudeCloudLayer = this->getPrecipitationAtAltitudeMax() * SG_METER_TO_FEET;
+
+ if (altitudeAircraft > altitudeCloudLayer) {
+ // The aircraft is above the cloud layer
+ rain_intensity = 0;
+ snow_intensity = 0;
+ }
+ else {
+ // The aircraft is bellow the cloud layer
+ rain_intensity = fgGetDouble("/environment/metar/rain-norm", 0.0);
+ snow_intensity = fgGetDouble("/environment/metar/snow-norm", 0.0);
+ }
+
+ // Get the current and dew temperature
+ dewtemp = fgGetDouble("/environment/dewpoint-degc", 0.0);
+ currtemp = fgGetDouble("/environment/temperature-degc", 0.0);
+
+ if (currtemp < dewtemp) {
+ // There is fog... and the weather is very steamy
+ if (rain_intensity == 0)
+ rain_intensity = 0.15;
+ }
+
+ // If the current temperature is below 0°C, we turn off the rain to snow...
+ if (currtemp < 0)
+ precipitation->setFreezing(true);
+ else
+ precipitation->setFreezing(false);
+
+
+ // Set the wind property
+ precipitation->setWindProperty(
+ fgGetDouble("/environment/wind-from-heading-deg", 0.0),
+ fgGetDouble("/environment/wind-speed-kt", 0.0));
+
+ // Set the intensity of precipitation
+ precipitation->setRainIntensity(rain_intensity);
+ precipitation->setSnowIntensity(snow_intensity);
+
+ // Update the drawing...
+ precipitation->update();
+
+ return true;
+}
+
+
--- /dev/null
+/**
+ * @file precipitation_mgr.hxx
+ * @author Nicolas VIVIEN
+ * @date 2008-02-10
+ *
+ * @note Copyright (C) 2008 Nicolas VIVIEN
+ *
+ * @brief Precipitation manager
+ * This manager calculate the intensity of precipitation in function of the altitude,
+ * calculate the wind direction and velocity, then update the drawing of precipitation.
+ *
+ * @par Licences
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * @par CVS
+ * $Id$
+ */
+
+#ifndef _PRECIPITATION_MGR_HXX
+#define _PRECIPITATION_MGR_HXX
+
+#include <simgear/environment/precipitation.hxx>
+
+#include "precipitation_mgr.hxx"
+
+
+class FGPrecipitationMgr {
+private:
+ osg::Group *group;
+ osg::MatrixTransform *transform;
+ SGPrecipitation *precipitation;
+ float getPrecipitationAtAltitudeMax(void);
+
+
+public:
+ FGPrecipitationMgr();
+ ~FGPrecipitationMgr();
+ bool update(void);
+ osg::Group * getObject(void);
+};
+
+#endif
+
projects / flightgear.git / commitdiff