Hi Bawenang, * * I don't see a problem with that, the skydome class was only really created to dress up the example code.
Regards, Kim. On 1 December 2011 11:46, Bawenang Rukmoko <[email protected]> wrote: > Hi, > > First of all, I would like to ask a permission to use and modify the > SkyDome used in the oceanExample and make it into a separate library. I > know that it is not really a part of osgOcean library, but I reckon that > the devs should be the same. So I asked the question here. > > Like the title above, I wanted to change the SkyDome and make it to use a > repeating Texture2D instead of the TextureCubeMap. I need the SkyDome to > display the starfield repeatedly, while also making the texture stretching > be as natural as possible (ie. not overstretched like the current SkyDome). > It still didn't work because it showed the color array of the SphereSegment > geometry. The SphereSegment class is the same as the one in oceanExample. > However, I've reworked the SkyDome class. This is my SkyDome class. > > > > > Thank you! > > Cheers, > Bawenang > > > Code: > > SkyDome.h > > class OSGATMOSPHERE_EXPORT SkyDome : public SphereSegment > { > public: > /** > * Sky Dome Parameters struct > * > */ > struct SkyDomeParams > { > float radius; > unsigned int longSteps; > unsigned int latSteps; > std::string starfieldTexName; > > ///Ctor > SkyDomeParams() > // : radius(10000) > : radius(1900) > , longSteps(4) > , latSteps(4) > , starfieldTexName("") > { > > } > > ///Ctor with params > SkyDomeParams(float r, unsigned int longitudeStep, unsigned > int latitudeStep, const std::string& texName) > // : radius(10000) > : radius(r) > , longSteps(longitudeStep) > , latSteps(latitudeStep) > , starfieldTexName(texName) > { > > } > > ///Copy Ctor > SkyDomeParams(const SkyDomeParams& copy) > { > this->radius = copy.radius; > this->longSteps = copy.longSteps; > this->latSteps = copy.latSteps; > this->starfieldTexName = copy.starfieldTexName; > } > > ///Assignment Op > SkyDomeParams& operator = (const SkyDomeParams& copy) > { > this->radius = copy.radius; > this->longSteps = copy.longSteps; > this->latSteps = copy.latSteps; > this->starfieldTexName = copy.starfieldTexName; > > return *this; > } > > ///Dtor > ~SkyDomeParams() > { > } > > }; > > SkyDome( void ); > SkyDome( const SkyDome& copy, const osg::CopyOp& > copyop=osg::CopyOp::SHALLOW_COPY ); > SkyDome( float radius, unsigned int longSteps, unsigned int > latSteps, const std::string& starfieldTexName ); > SkyDome( const SkyDomeParams& skyDomeParams ); > > protected: > ~SkyDome(void); > > public: > void setupStateSet( ); > void create( float radius, unsigned int latSteps, unsigned > int longSteps, const std::string& starfieldTexName ); > void create( const SkyDomeParams& skyDomeParams ); > > //++ BAWE-20111128: SKYDOME > /** > * > */ > inline void setStarField( const std::string& > starfieldTexName ) > { > if (!mStarfieldTexture.valid()) > { > mStarfieldTexture = new osg::Texture2D; > _setTextureParams( ); > } > _createTexture( starfieldTexName ); > } > > void showPolyLine(bool isShowLine); > //-- BAWE-20111128: SKYDOME > > private: > osg::ref_ptr<osg::Program> _createShader(void); > void _setTextureParams( ); > void _createTexture( const std::string& starfieldTexName ); > void _createFromParams(); > > SkyDomeParams mSkyDomeParams; > bool mIsShowPolyLine; > osg::ref_ptr<osg::Texture2D> mStarfieldTexture; > > }; > > > > > > Code: > > SkyDome.cpp > > SkyDome::SkyDome( void ) > : mIsShowPolyLine (false) > , mSkyDomeParams () > { > > } > > SkyDome::SkyDome( const SkyDome& copy, const osg::CopyOp& copyop ): > SphereSegment( copy, copyop ) > { > > } > > SkyDome::SkyDome( float radius, unsigned int longSteps, unsigned int > latSteps, const std::string& starfieldTexName ) > : mIsShowPolyLine (false) > , mSkyDomeParams () > { > create( radius, longSteps, latSteps,starfieldTexName ); > setupStateSet(); > showPolyLine(false); > } > > SkyDome::SkyDome( const SkyDomeParams& skyDomeParams ) > : mIsShowPolyLine (false) > , mSkyDomeParams () > { > create( skyDomeParams ); > setupStateSet(); > showPolyLine(false); > } > > SkyDome::~SkyDome(void) > { > } > > void SkyDome::create( float radius, unsigned int longSteps, unsigned int > latSteps, const std::string& starfieldTexName ) > { > //compute( radius, longSteps, latSteps, 90.f, 180.f, 0.f, 360.f ); > mSkyDomeParams.radius = radius; > mSkyDomeParams.latSteps = latSteps; > mSkyDomeParams.longSteps = longSteps; > mSkyDomeParams.starfieldTexName = starfieldTexName; > _createFromParams(); > } > > void SkyDome::create( const SkyDomeParams& skyDomeParams ) > { > //compute( radius, longSteps, latSteps, 90.f, 180.f, 0.f, 360.f ); > mSkyDomeParams = skyDomeParams; > _createFromParams(); > } > > void SkyDome::_createFromParams( ) > { > //compute( radius, longSteps, latSteps, 90.f, 180.f, 0.f, 360.f ); > compute( mSkyDomeParams.radius, mSkyDomeParams.longSteps, > mSkyDomeParams.latSteps, 0.f, 180.f, 0.f, 360.f ); > setStarField(mSkyDomeParams.starfieldTexName); > } > > > > void SkyDome::setupStateSet( ) > { > osg::StateSet* ss = new osg::StateSet; > > ss->setMode(GL_LIGHTING, osg::StateAttribute::OFF); > ss->setAttributeAndModes( _createShader().get(), > osg::StateAttribute::ON ); > ss->addUniform( new osg::Uniform("uEnvironmentMap", 0) ); > ss->setTextureMode(0,GL_TEXTURE_1D,osg::StateAttribute::OFF); > ss->setTextureMode(0,GL_TEXTURE_2D,osg::StateAttribute::ON); > ss->setTextureMode(0,GL_TEXTURE_3D,osg::StateAttribute::OFF); > > setStateSet(ss); > } > > osg::ref_ptr<osg::Program> SkyDome::_createShader(void) > { > osg::ref_ptr<osg::Program> program = new osg::Program; > > // Do not use shaders if they were globally disabled. > if (ShaderManager::instance().areShadersEnabled()) > { > char vertexSource[]= > "varying vec2 vTexCoord;\n" > "\n" > "void main(void)\n" > "{\n" > " gl_TexCoord[0] = gl_MultiTexCoord0;\n" > " vTexCoord = gl_Vertex.xy;\n" > "}\n"; > > char fragmentSource[]= > "uniform sampler2D uEnvironmentMap;\n" > "varying vec2 vTexCoord;\n" > "\n" > "void main(void)\n" > "{\n" > " gl_FragData[0] = texture2D( uEnvironmentMap, > gl_TexCoord[0].st );\n" > //" gl_FragData[0].a = 0.0;\n" > " gl_FragData[0].a = 1.0;\n" > " gl_FragData[1] = vec4(0.0);\n" > "}\n"; > > program->setName( "sky_dome_shader" ); > program->addShader(new osg::Shader(osg::Shader::VERTEX, > vertexSource)); > program->addShader(new osg::Shader(osg::Shader::FRAGMENT, > fragmentSource)); > } > > return program; > } > > void SkyDome::_setTextureParams( ) > { > mStarfieldTexture->setInternalFormat(GL_RGBA); > > mStarfieldTexture->setFilter( osg::Texture::MIN_FILTER, > osg::Texture::NEAREST_MIPMAP_NEAREST); > mStarfieldTexture->setFilter( osg::Texture::MAG_FILTER, > osg::Texture::NEAREST); > mStarfieldTexture->setWrap ( osg::Texture::WRAP_S, > osg::Texture::REPEAT); > mStarfieldTexture->setWrap ( osg::Texture::WRAP_T, > osg::Texture::REPEAT); > // mStarfieldTexture->setWrap ( osg::Texture::WRAP_T, > osg::Texture::CLAMP_TO_EDGE); > // mStarfieldTexture->setWrap ( osg::Texture::WRAP_S, > osg::Texture::CLAMP_TO_EDGE); > > } > > void SkyDome::_createTexture( const std::string& starfieldTexName ) > { > mStarfieldTexture->setImage( osgDB::readImageFile( starfieldTexName ) ); > > getOrCreateStateSet()->setTextureAttributeAndModes( 0, > mStarfieldTexture.get(), osg::StateAttribute::ON ); > > } > > void SkyDome::showPolyLine(bool isShowLine) > { > // > -------------------------------------------------------------------------------- > // Grab the state set of the node, this will a StateSet if one does > not exist > // > -------------------------------------------------------------------------------- > osg::StateSet *state = getOrCreateStateSet(); > > // > ---------------------------------------------------------------------------------------------- > // We need to retrieve the Polygon mode of the state set, and create > one if does not have one > // > ---------------------------------------------------------------------------------------------- > osg::PolygonMode *polyModeObj; > > polyModeObj = dynamic_cast< osg::PolygonMode* > > ( state->getAttribute( osg::StateAttribute::POLYGONMODE )); > > if ( !polyModeObj ) { > > polyModeObj = new osg::PolygonMode; > > state->setAttribute( polyModeObj ); > } > > // -------------------------------------------- > // Now we can set the state to WIREFRAME > // -------------------------------------------- > > if (isShowLine) > polyModeObj->setMode( osg::PolygonMode::FRONT_AND_BACK, > osg::PolygonMode::LINE ); > else > polyModeObj->setMode( osg::PolygonMode::FRONT_AND_BACK, > osg::PolygonMode::FILL ); > > mIsShowPolyLine = isShowLine; > } > > > > > So what went wrong here? Is it because of the texture mapping with the > texcoord array in SphereSegment? Thanks in advance. > > ------------------------ > "There's no place like 127.0.0.1" > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=44155#44155 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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