src/Instrumentation/od_gauge.cxx

   1 // Owner Drawn Gauge helper class
   2 //
   3 // Written by Harald JOHNSEN, started May 2005.
   4 //
   5 // Copyright (C) 2005  Harald JOHNSEN
   6 //
   7 // Ported to OSG by Tim Moore - Jun 2007
   8 //
   9 // This program is free software; you can redistribute it and/or
  10 // modify it under the terms of the GNU General Public License as
  11 // published by the Free Software Foundation; either version 2 of the
  12 // License, or (at your option) any later version.
  13 //
  14 // This program is distributed in the hope that it will be useful, but
  15 // WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17 // General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU General Public License
  20 // along with this program; if not, write to the Free Software
  21 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  22 //
  23 //
  24
  25 #ifdef HAVE_CONFIG_H
  26 #  include "config.h"
  27 #endif
  28
  29 #include <osg/AlphaFunc>
  30 #include <osg/BlendFunc>
  31 #include <osg/Camera>
  32 #include <osg/Geode>
  33 #include <osg/NodeVisitor>
  34 #include <osg/Matrix>
  35 #include <osg/PolygonMode>
  36 #include <osg/ShadeModel>
  37 #include <osg/StateSet>
  38 #include <osgDB/FileNameUtils>
  39
  40 #include <simgear/scene/util/RenderConstants.hxx>
  41 #include <simgear/screen/extensions.hxx>
  42 #include <simgear/debug/logstream.hxx>
  43
  44 #include <Main/globals.hxx>
  45 #include <Main/renderer.hxx>
  46 #include <Scenery/scenery.hxx>
  47 #include "od_gauge.hxx"
  48
  49 FGODGauge::FGODGauge() :
  50     rtAvailable( false )// ,
  51 //     rt( 0 )
  52 {
  53 }
  54
  55 void FGODGauge::allocRT () {
  56     camera = new osg::Camera;
  57     // Only the far camera should trigger this texture to be rendered.
  58     camera->setNodeMask(simgear::BACKGROUND_BIT);
  59     camera->setProjectionMatrix(osg::Matrix::ortho2D(-256.0, 256.0, -256.0,
  60             256.0));
  61     camera->setViewport(0, 0, textureWH, textureWH);
  62     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
  63     camera->setRenderOrder(osg::Camera::PRE_RENDER);
  64     camera->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  65     camera->setClearColor(osg::Vec4(0.0f, 0.0f, 0.0f , 0.0f));
  66     camera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT, osg::Camera::FRAME_BUFFER);
  67     osg::StateSet* stateSet = camera->getOrCreateStateSet();
  68     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
  69     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
  70     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
  71     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
  72     stateSet->setAttributeAndModes(new osg::PolygonMode(osg::PolygonMode::FRONT_AND_BACK,
  73             osg::PolygonMode::FILL),
  74             osg::StateAttribute::ON);
  75     stateSet->setAttributeAndModes(new osg::AlphaFunc(osg::AlphaFunc::GREATER,
  76             0.0f),
  77             osg::StateAttribute::ON);
  78     stateSet->setAttribute(new osg::ShadeModel(osg::ShadeModel::FLAT));
  79     stateSet->setAttributeAndModes(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA,
  80             osg::BlendFunc::ONE_MINUS_SRC_ALPHA),
  81             osg::StateAttribute::ON);
  82     if (!texture.valid()) {
  83         texture = new osg::Texture2D;
  84         texture->setTextureSize(textureWH, textureWH);
  85         texture->setInternalFormat(GL_RGBA);
  86         texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
  87         texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
  88     }
  89     camera->attach(osg::Camera::COLOR_BUFFER, texture.get());
  90     globals->get_renderer()->addCamera(camera.get(), false);
  91     rtAvailable = true;
  92
  93     // GLint colorBits = 0;
  94 //     glGetIntegerv( GL_BLUE_BITS, &colorBits );
  95 //     rt = new RenderTexture();
  96 //     if( colorBits < 8 )
  97 //         rt->Reset("rgba=5,5,5,1 ctt");
  98 //     else
  99 //         rt->Reset("rgba ctt");
 100
 101 //     if( rt->Initialize(256, 256, true) ) {
 102 //         SG_LOG(SG_ALL, SG_INFO, "FGODGauge:Initialize sucessfull");
 103 //         if (rt->BeginCapture())
 104 //         {
 105 //             SG_LOG(SG_ALL, SG_INFO, "FGODGauge:BeginCapture sucessfull, RTT available");
 106 //             rtAvailable = true;
 107 //             glViewport(0, 0, textureWH, textureWH);
 108 //             glMatrixMode(GL_PROJECTION);
 109 //             glLoadIdentity();
 110 //             gluOrtho2D( -256.0, 256.0, -256.0, 256.0 );
 111 //             glMatrixMode(GL_MODELVIEW);
 112 //             glLoadIdentity();
 113 //             glDisable(GL_LIGHTING);
 114 //             glEnable(GL_COLOR_MATERIAL);
 115 //             glDisable(GL_CULL_FACE);
 116 //             glDisable(GL_FOG);
 117 //             glDisable(GL_DEPTH_TEST);
 118 //             glClearColor(0.0, 0.0, 0.0, 0.0);
 119 //             glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 120 //             glBindTexture(GL_TEXTURE_2D, 0);
 121 //             glEnable(GL_TEXTURE_2D);
 122 //             glEnable(GL_ALPHA_TEST);
 123 //             glAlphaFunc(GL_GREATER, 0.0f);
 124 //             glDisable(GL_SMOOTH);
 125 //             glEnable(GL_BLEND);
 126 //             glBlendFunc( GL_ONE, GL_ONE_MINUS_SRC_ALPHA );
 127 //             rt->EndCapture();
 128 //         } else
 129 //             SG_LOG(SG_ALL, SG_WARN, "FGODGauge:BeginCapture failed, RTT not available, using backbuffer");
 130 //     } else
 131 //         SG_LOG(SG_ALL, SG_WARN, "FGODGauge:Initialize failed, RTT not available, using backbuffer");
 132 }
 133
 134 FGODGauge::~FGODGauge() {
 135 //     delete rt;
 136 }
 137
 138 void FGODGauge::init () {
 139 }
 140
 141 void FGODGauge::update (double dt) {
 142 }
 143
 144
 145 void FGODGauge::setSize(int viewSize) {
 146     textureWH = viewSize;
 147 //     glViewport(0, 0, textureWH, textureWH);
 148 }
 149
 150 bool FGODGauge::serviceable(void) {
 151     return rtAvailable;
 152 }
 153
 154 /**
 155  * Replace a texture in the airplane model with the gauge texture.
 156  */
 157
 158 class ReplaceStaticTextureVisitor : public osg::NodeVisitor
 159 {
 160 public:
 161     ReplaceStaticTextureVisitor(const std::string& name,
 162         osg::Texture2D* _newTexture) :
 163         osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
 164         newTexture(_newTexture)
 165     {
 166         textureFileName = osgDB::getSimpleFileName(name);
 167     }
 168
 169     virtual void apply(osg::Node& node)
 170     {
 171         osg::StateSet* ss = node.getStateSet();
 172         if (ss)
 173             changeStateSetTexture(ss);
 174         traverse(node);
 175     }
 176
 177     virtual void apply(osg::Geode& node)
 178     {
 179         int numDrawables = node.getNumDrawables();
 180         for (int i = 0; i < numDrawables; i++) {
 181             osg::Drawable* drawable = node.getDrawable(i);
 182             osg::StateSet* ss = drawable->getStateSet();
 183             if (ss)
 184                 changeStateSetTexture(ss);
 185         }
 186         traverse(node);
 187 }
 188 protected:
 189     void changeStateSetTexture(osg::StateSet *ss)
 190     {
 191         osg::Texture2D* tex
 192                 = dynamic_cast<osg::Texture2D*>(ss->getTextureAttribute(0,
 193                 osg::StateAttribute::TEXTURE));
 194         if (!tex || tex == newTexture || !tex->getImage())
 195             return;
 196         std::string fileName = tex->getImage()->getFileName();
 197         std::string simpleName = osgDB::getSimpleFileName(fileName);
 198         if (osgDB::equalCaseInsensitive(textureFileName, simpleName))
 199             ss->setTextureAttribute(0, newTexture);
 200     }
 201     std::string textureFileName;
 202     osg::Texture2D* newTexture;
 203 };
 204
 205 void FGODGauge::set_texture(const char * name, osg::Texture2D* new_texture)
 206 {
 207     osg::Group* root = globals->get_scenery()->get_aircraft_branch();
 208     ReplaceStaticTextureVisitor visitor(name, new_texture);
 209     root->accept(visitor);
 210 }
 211