source: osgVisual/src/sky_Silverlining/skySilverLining_skyDrawable.cpp @ 59

Last change on this file since 59 was 55, checked in by Torben Dannhauer, 14 years ago

Updated to new osg version with new manipulator schema.
Updated integration of 3dx SpaceNavigator? to allow disabling without compile errors.

File size: 8.8 KB
Line 
1/* -*-c++-*- osgVisual - Copyright (C) 2009-2010 Torben Dannhauer
2 *
3 * This library is based on OpenSceneGraph, open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * osgVisual requires for some proprietary modules a license from the correspondig manufacturer.
9 * You have to aquire licenses for all used proprietary modules.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * OpenSceneGraph Public License for more details.
15 *
16 * This file is based on the OSG example of the Silverlining SDK:
17 * Copyright (c) 2008 Sundog Software, LLC. All rights reserved worldwide.
18*/
19
20#include <skySilverLining_skyDrawable.h>
21#include <SilverLining.h>
22#include <skySilverLining_AtmosphereReference.h>
23
24#include <GL/gl.h>
25#include <GL/glu.h>
26#include <assert.h>
27
28
29
30using namespace SilverLining;
31using namespace osgVisual;
32
33skySilverLining_skyDrawable::skySilverLining_skyDrawable()
34        : osg::Drawable()
35                , _view(0)
36                , _skyboxSize(0)
37{
38    setDataVariance(osg::Object::DYNAMIC);
39    setUseVertexBufferObjects(false);
40    setUseDisplayList(false);
41        cloudLayerSlots.clear();
42        newCloudLayersToAdd = false;
43}
44
45skySilverLining_skyDrawable::skySilverLining_skyDrawable(osgViewer::Viewer* view,  osg::CoordinateSystemNode* csn_)
46        : osg::Drawable()
47        , _view(view)
48                , _skyboxSize(0)
49{
50    setDataVariance(osg::Object::DYNAMIC);
51    setUseVertexBufferObjects(false);
52    setUseDisplayList(false);
53        cloudLayerSlots.clear();
54        newCloudLayersToAdd = false;
55        sceneRoot = csn_;
56}
57
58void skySilverLining_skyDrawable::setLighting(SilverLining::Atmosphere *atmosphere) const
59{
60    osg::Light *light = _view->getLight();
61    osg::Vec4 ambient, diffuse;
62    osg::Vec3 direction;
63
64    if (atmosphere && light)
65    {
66        float ra, ga, ba, rd, gd, bd, x, y, z;
67        atmosphere->GetAmbientColor(&ra, &ga, &ba);
68        atmosphere->GetSunOrMoonColor(&rd, &gd, &bd);
69        atmosphere->GetSunOrMoonPosition(&x, &y, &z);
70
71        direction = osg::Vec3(x, y, z);
72        ambient = osg::Vec4(ra, ga, ba, 1.0);
73        diffuse = osg::Vec4(rd, gd, bd, 1.0);
74
75        // xform the light direction into camera coordinates
76        osg::Quat view = _view->getCamera()->getViewMatrix().getRotate();
77        //direction = view * direction;
78        direction.normalize();
79
80        light->setAmbient(ambient);
81        light->setDiffuse(diffuse);
82        light->setSpecular(osg::Vec4(0,0,0,1));
83        light->setPosition(osg::Vec4(direction.x(), direction.y(), direction.z(), 0));
84    }
85}
86
87void skySilverLining_skyDrawable::setSceneFog(SilverLining::Atmosphere *atmosphere) const
88{   
89        osg::ref_ptr<osg::Fog> fog = new osg::Fog;
90    fog->setMode(osg::Fog::EXP);
91        //fog->setUseRadialFog( true );
92
93        //_objectsNode  = erde oder object, das mit nebel bedacht werden soll   
94        sceneRoot->getOrCreateStateSet()->setAttributeAndModes(fog.get());
95
96        //float hazeR, hazeG, hazeB;
97        //double hazeDepth, hazeDensity;
98        //atmosphere->GetHaze(hazeR, hazeG, hazeB, hazeDepth, hazeDensity);
99
100    //hazeDensity = 1.0 / 40000;
101        //hazeDensity = 0;
102        float hazeDensity = 1.0 / atmosphere->GetConditions()->GetVisibility();
103
104    // Decrease fog density with altitude, to avoid fog effects through the vacuum of space.
105    static const double H = 8435.0; // Pressure scale height of Earth's atmosphere
106    double isothermalEffect = exp(-(atmosphere->GetConditions()->GetLocation().GetAltitude() / H));     
107    if (isothermalEffect <= 0) isothermalEffect = 1E-9;
108    if (isothermalEffect > 1.0) isothermalEffect = 1.0;
109    hazeDensity *= isothermalEffect;
110
111    bool silverLiningHandledTheFog = false;
112
113    if (atmosphere->GetFogEnabled())
114    {
115            float density, r, g, b;
116            // Note, the fog color returned is already lit
117            atmosphere->GetFogSettings(&density, &r, &g, &b);
118
119            if (density > hazeDensity)
120            {
121                                fog->setDensity(density);
122                                fog->setColor(osg::Vec4(r, g, b, 1.0));
123
124                                silverLiningHandledTheFog = true;
125            }
126    }
127   
128    if (!silverLiningHandledTheFog)
129    {
130                float r, g, b;
131                atmosphere->GetHorizonColor(0, &r, &g, &b);// New version of this call: since SL_1.94 /** \todo transmit the yaw value of the center channel to all slaves for consistent fog color. */
132
133                fog->setDensity(hazeDensity);
134                fog->setColor(osg::Vec4(r, g, b, 1.0));
135    }
136
137}
138
139void skySilverLining_skyDrawable::initializeSilverLining(skySilverLining_atmosphereReference *ar)
140{
141    if (ar && !ar->atmosphereInitialized)
142    {
143        ar->atmosphereInitialized = true; // only try once.
144                SilverLining::Atmosphere *atmosphere = ar->atmosphere;
145
146                if (atmosphere)
147        {
148                        srand(1234); // constant random seed to ensure consistent clouds across windows
149
150            // Update the path below to where you installed SilverLining's resources folder.
151            //int ret = atmosphere->Initialize(SilverLining::Atmosphere::OPENGL, "C:\\Program Files\\SilverLining SDK\\resources\\", true, 0);
152                        int ret = atmosphere->Initialize(SilverLining::Atmosphere::OPENGL, "../resources/sky_silverlining/", true, 0);
153            if (ret != SilverLining::Atmosphere::E_NOERROR)
154            {
155                printf("SilverLining failed to initialize; error code %d.\n", ret);
156                printf("Check that the path to the SilverLining installation directory is set properly ");
157                printf("in skySilverLining_skyDrawable.cpp (in SkyDrawable::initializeSilverLining)\n");
158                exit(0);
159            }
160
161            // Let SilverLining know which way is up. OSG usually has Z going up.
162            //atmosphere->SetUpVector(0, 0, 1);
163            //atmosphere->SetRightVector(1, 0, 0);
164                        atmosphere->SetUpVector(0.662994, 0.136169, 0.736136);
165                        atmosphere->SetRightVector(-0.201185, 0.979553, 0.0);
166
167            // Set our location (change this to your own latitude and longitude)
168            SilverLining::Location loc;
169            loc.SetAltitude(0);
170            loc.SetLatitude(47);
171            loc.SetLongitude(11);
172            atmosphere->GetConditions()->SetLocation(loc);
173
174            // Set the sstem time in PST
175            SilverLining::LocalTime t;
176            t.SetFromSystemTime();
177                        t.SetTimeZone(CET);
178            atmosphere->GetConditions()->SetTime(t);
179
180                        // Setting Up Visibility
181                        atmosphere->GetConditions()->SetVisibility(40000);
182
183                        // Setting Up Haze
184                        atmosphere->GetConditions()->SetTurbidity(2.2);
185
186                        atmosphere->GetConditions()->EnableTimePassage( true, 5000 );
187                       
188                }       // if atmosphere ENDE
189
190    }   // If atmosphere not initialized ENDE
191}
192
193void skySilverLining_skyDrawable::drawImplementation(osg::RenderInfo& renderInfo) const
194{
195        skySilverLining_atmosphereReference *ar = dynamic_cast<skySilverLining_atmosphereReference *>(renderInfo.getCurrentCamera()->getUserData());
196        SilverLining::Atmosphere *atmosphere = 0;
197
198        if (ar) atmosphere = ar->atmosphere;
199
200        renderInfo.getState()->disableAllVertexArrays();
201
202    if (atmosphere)
203    {
204        initializeSilverLining(ar);
205                const_cast<skySilverLining_skyDrawable*>(this)->seedAndAddCloudLayers(atmosphere);
206
207
208        atmosphere->BeginFrame(true, true, _skyboxSize);
209        setLighting(atmosphere);
210                setSceneFog(atmosphere);
211    }
212
213        renderInfo.getState()->dirtyAllVertexArrays();
214}
215
216void skySilverLining_skyDrawable::addCloudLayer(cloudLayerSlot *cloudLayerSlot_)
217{
218        OpenThreads::ScopedLock<OpenThreads::Mutex> sLock(cloudLayersToAddMutex); 
219        cloudLayerSlots.push_back( cloudLayerSlot_ );
220        newCloudLayersToAdd = true;
221}
222
223
224
225void skySilverLining_skyDrawable::seedAndAddCloudLayers(SilverLining::Atmosphere *atmosphere)
226{
227        // Only try to add if anything to do..
228        if ( newCloudLayersToAdd )
229        {
230                OpenThreads::ScopedLock<OpenThreads::Mutex> sLock(cloudLayersToAddMutex); 
231                for ( unsigned int i=0; cloudLayerSlots.size() > 0; i++)
232                {
233                        // Seed cloudLayer
234                        cloudLayerSlots.back()->cloudLayerPointer->SeedClouds(*atmosphere);
235
236                        //cloudLayerSlots.back()->cloudLayerPointer->SetEnabled( false );       // Todo: testing, please remove
237                        //cloudLayerSlots.back()->cloudLayerPointer->SetEnabled( true, 30000);  // Todo: testing, please remove
238
239                        // add cloudLayer to atmosphere
240                        cloudLayerSlots.back()->cloudLayerHandle = atmosphere->GetConditions()->AddCloudLayer( cloudLayerSlots.back()->cloudLayerPointer );
241
242                        // Delete this cloudLayer from the ToDo list.
243                        cloudLayerSlots.pop_back();
244                }
245
246                // Note nothing to do.
247                newCloudLayersToAdd = false;
248        }
249}
250
251void skySilverLining_skyDrawable::shutdown()
252{
253        sceneRoot = NULL;
254}
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