Hi Sukender, >>- Use an image sequence of normal maps, that has the advantage of being almost the same code as for >>a non animated bump. >>- Or look at (procedural) shaders, that will have the advantage of not taking memory for textures, even if >>you want a very smooth animation.
Actually I will mix of two, I create one normal map from wave texture and then animate on the water surface by changing texture coordinates so it can be seen moving and waving water surface. I will try as soon as possible but now I will look at OpenAL for couple of weeks :) I need sounds as you. I think you use osgAL on your project but I will try to use OpenAL till the osgAudio is released. I am waiting 2.10 release with hoping osgAudio nodekit :) >>Just for curiosity: what are you working on? I am trying to create submarine simulator but I am naive on this topic :) I am learning GLSL and OpenGL. For now I want to create water simuation as you can see from http://dangerdeep.sourceforge.net/ But it is too hard for me at the present. Best Regards. 2008/11/27 Sukender <[EMAIL PROTECTED]> > Hi Ümit, > > Considering you want to *animate* your bump/normal map, you may: > - Use an image sequence of normal maps, that has the advantage of being > almost the same code as for a non animated bump. > - Or look at (procedural) shaders, that will have the advantage of not > taking memory for textures, even if you want a very smooth animation. > > I just can't help you for shaders because I don't know anything about them. > Try searching the web. > > For non animated bumps, well maybe many wrote examples or code using it but > I can't indicate you where. > For my part, I used a bump for the loading screen of a tiny game: the bump > is loaded from a gray-scale, then converted to a normal map using my > function, applied to a quad, and then modulated by the color texture. The > light source then moves during the loading process. The code can be found at > > http://paratrooper.svn.sourceforge.net/viewvc/paratrooper/trunk/Src/App.cpp?view=markup(search > for "TexEnvCombine::DOT3_RGB" and you'll find a block of code about > the "logo"). Code is GPL, but as long as you just take a few lines, there's > no problem for me using it the way you want. > Once it works for you, you'll be able to replace the texture by an image > sequence. > > However, you should try to have a look to shaders. If you find or acheive > to write a nice animation, please tell me! > > Hope it helps. > > Just for curiosity: what are you working on? > > Sukender > PVLE - Lightweight cross-platform game engine - > http://pvle.sourceforge.net/ > > > Le Thu, 27 Nov 2008 08:27:53 +0100, Ümit Uzun <[EMAIL PROTECTED]> a > écrit: > > > Hi Sukender, > > > > Thanks for reply. Sorry I can't express my expected result because of my > > english :P Yes you understood me albeit my bad express. I have RGB > texture > > and want to create bump map animated surface to make more realistic > surface. > > I find normal map usage only osgVolume.cpp sample. If you know more > sample, > > please let me know. > > > > Thanks for helps. > > Best Regards. > > > > 2008/11/27 Sukender <[EMAIL PROTECTED]> > > > >> Hi Ümit, > >> > >> Err... I'm terribly sorry but I did not understood all of what you > wrote... > >> (maybe my english?) > >> > >> What do you call "Ocean wave texture"? Is that simply the RGB texture > >> describing the color of your ocean's surface? If so, then the color of > the > >> texture is rarely related to bump/normal mapping. You'll have to create > from > >> scratch (or find) a bump/normal map. You can try using a picture edition > >> software (such as "the Gimp") and use filters or generators to create a > >> gray-scaled image (where white=high and black=low). This is what I often > do > >> when I don't need to bee 100% realistic: that's just a nice bump map. > >> > >> I know you can create normal mapping for low polys from hi polys, but > >> that's not the goal of the function I told you. createNormalMap() only > >> converts a gray-scaled image to a normal map (texture that is blueish). > The > >> normal map can be then used more easily in OSG/OpenGL, using > >> TexEnvCombine::DOT3_RGB. If you need examples, you can look at the OSG > >> samples (I guess there is a normal map somewhere), or ask me. > >> > >> Note that using Google, I easily found some bump maps examples: > >> http://www.filterforge.com/filters/216-bump.jpg > >> http://www.m3corp.com/a/download/3d_textures/bump/instantcarpet.jpg > >> > >> I just hope this answers your questions. > >> > >> Sukender > >> PVLE - Lightweight cross-platform game engine - > >> http://pvle.sourceforge.net/ > >> > >> > >> Le Wed, 26 Nov 2008 16:01:29 +0100, Ümit Uzun <[EMAIL PROTECTED]> a > >> écrit: > >> > >> > Hi Sukender, > >> > > >> > I have searched about Normal Map and I see that to create normal map > we > >> need > >> > 2 models( high detailed polygon and low detailed polygon ) and then we > >> can > >> > create normal map using ray casting to find high detailed models > normals > >> at > >> > intersected areas and then save this normal as a texture which name is > >> > NormalMap. > >> > > >> > But my question is, I want to create NormalMap the ocean waves. But I > >> > haven't any models. Can I use Ocean wave texture to create > bumpmapping? I > >> > mean Can I create NormalMap from related wave texture? > >> > > >> > If I send the my oceanwave texture to the createNormalMap function, > then > >> I > >> > think. take back bluish normal map Sukender? > >> > > >> > 2008/11/26 Sukender <[EMAIL PROTECTED]> > >> > > >> >> This is not related to GLSL, but if someone needs it, I quickly wrote > a > >> >> function that transforms a gray-scale bump map into a normal map: > >> >> > http://pvle.sourceforge.net/Doc/Html/Utility3D_8cpp-source.html#l00115 > >> >> Hope this may be useful to someone, even if the function is not that > >> clean. > >> >> > >> >> Sukender > >> >> PVLE - Lightweight cross-platform game engine - > >> >> http://pvle.sourceforge.net/ > >> >> > >> >> > >> >> Le Wed, 26 Nov 2008 13:29:33 +0100, Morné Pistorius < > >> >> [EMAIL PROTECTED]> a écrit: > >> >> > >> >> > Thanks, > >> >> > I managed to implement a standard bump mapping shader in OSG. > Below > >> is a > >> >> > code snippet that does it if it might help someone else. Shaders > are > >> >> > attached. > >> >> > > >> >> > Cheers, > >> >> > Morne > >> >> > > >> >> > osg::Node * VOSGFloorGrid::CreateBumpMappedFloor() > >> >> > { > >> >> > const int BASE_TEX_UNIT = 0; > >> >> > const int BUMP_TEX_UNIT = 1; > >> >> > const int TANGENT_ATR_UNIT = 6; > >> >> > const int BINORMAL_ATR_UNIT = 7; > >> >> > > >> >> > osg::Geode* geode = new osg::Geode; > >> >> > > >> >> > // set up the Geometry. > >> >> > osg::Geometry* geom = new osg::Geometry; > >> >> > > >> >> > osg::Vec3 width, depth, topleft; > >> >> > topleft = osg::Vec3( -Size/2.0, -Size/2.0, 0.0 ); > >> >> > width = osg::Vec3( Size, 0.0, 0.0 ); > >> >> > depth = osg::Vec3( 0.0, Size, 0.0 ); > >> >> > > >> >> > osg::Vec3Array* coords = new osg::Vec3Array(4); > >> >> > (*coords)[0] = topleft; > >> >> > (*coords)[1] = topleft+width; > >> >> > (*coords)[2] = topleft+width+depth; > >> >> > (*coords)[3] = topleft+depth; > >> >> > > >> >> > geom->setVertexArray(coords); > >> >> > > >> >> > osg::Vec3Array* norms = new osg::Vec3Array(1); > >> >> > (*norms)[0] = osg::Vec3( 0.0, 1.0, 0.0 ); > >> >> > > >> >> > geom->setNormalArray(norms); > >> >> > geom->setNormalBinding(osg::Geometry::BIND_OVERALL); > >> >> > > >> >> > osg::Vec4Array* color = new osg::Vec4Array(1); > >> >> > (*color)[0] = osg::Vec4(1.0f,1.0f,1.0f,1.0f); > >> >> > > >> >> > geom->setColorArray( color ); > >> >> > geom->setColorBinding( osg::Geometry::BIND_OVERALL ); > >> >> > > >> >> > osg::Vec2Array* tcoords = new osg::Vec2Array(4); > >> >> > float n = 5.0f; // no of times the texture is repeated > >> >> > (*tcoords)[0].set( 0.0f, 0.0f ); > >> >> > (*tcoords)[1].set( n, 0.0f ); > >> >> > (*tcoords)[2].set( n, n ); > >> >> > (*tcoords)[3].set( 0.0f, n ); > >> >> > geom->setTexCoordArray( BASE_TEX_UNIT, tcoords ); > >> >> > geom->setTexCoordArray( BUMP_TEX_UNIT, tcoords ); > >> >> > > >> >> > geom->addPrimitiveSet( new osg::DrawArrays( > >> osg::PrimitiveSet::QUADS, 0 > >> >> , > >> >> > coords->size() ) ); > >> >> > geode->addDrawable( geom ); > >> >> > > >> >> > // Compute smoothed normals > >> >> > osgUtil::SmoothingVisitor smoother; > >> >> > smoother.apply( *geode ); > >> >> > > >> >> > // model texture > >> >> > osg::Texture2D * diffuse = new osg::Texture2D; > >> >> > diffuse->setImage( osgDB::readImageFile( m_sSystemPath + > >> >> > "/Resources/Floor.tga" ) ); > >> >> > diffuse->setWrap( osg::Texture2D::WRAP_S, osg::Texture2D::REPEAT > ); > >> >> > diffuse->setWrap( osg::Texture2D::WRAP_T, osg::Texture2D::REPEAT > ); > >> >> > diffuse->setResizeNonPowerOfTwoHint( false ); > >> >> > diffuse->setMaxAnisotropy( 8.0f ); > >> >> > > >> >> > // bump map texture > >> >> > osg::Texture2D * normal = new osg::Texture2D; > >> >> > normal->setImage( osgDB::readImageFile( m_sSystemPath + > >> >> > "/Resources/FloorNormalMap.tga" ) ); > >> >> > normal->setWrap( osg::Texture2D::WRAP_S, osg::Texture2D::REPEAT > ); > >> >> > normal->setWrap( osg::Texture2D::WRAP_T, osg::Texture2D::REPEAT > ); > >> >> > normal->setResizeNonPowerOfTwoHint( false ); > >> >> > normal->setMaxAnisotropy( 8.0f ); > >> >> > > >> >> > > >> >> > > >> >> > >> > ////////////////////////////////////////////////////////////////////////// > >> >> > // Set up bump mapping shaders > >> >> > > >> >> > // Load and compile shader source > >> >> > osg::Program * bump = new osg::Program; > >> >> > osg::Shader * bumpVertexShader = new osg::Shader( > >> osg::Shader::VERTEX > >> >> ); > >> >> > osg::Shader * bumpPixelShader = new osg::Shader( > >> osg::Shader::FRAGMENT > >> >> ); > >> >> > bumpVertexShader->loadShaderSourceFromFile( m_sSystemPath + > >> >> > "/Resources/bumpmap.vert" ); > >> >> > bumpPixelShader->loadShaderSourceFromFile( m_sSystemPath + > >> >> > "/Resources/bumpmap.frag" ); > >> >> > bump->addShader( bumpVertexShader ); > >> >> > bump->addShader( bumpPixelShader ); > >> >> > > >> >> > // Set up the shader stateset > >> >> > osg::StateSet * stateset = geode->getOrCreateStateSet(); > >> >> > stateset->setTextureAttribute( BASE_TEX_UNIT, diffuse ); > >> >> > stateset->setTextureAttribute( BUMP_TEX_UNIT, normal ); > >> >> > stateset->setAttributeAndModes( bump, osg::StateAttribute::ON ); > >> >> > > >> >> > // Compute tangent space for geometry > >> >> > osg::ref_ptr< osgUtil::TangentSpaceGenerator > tsg = new > >> >> > osgUtil::TangentSpaceGenerator; > >> >> > tsg->generate( geom, BUMP_TEX_UNIT ); > >> >> > geom->setVertexAttribData( TANGENT_ATR_UNIT, > >> osg::Geometry::ArrayData( > >> >> > tsg->getTangentArray(), osg::Geometry::BIND_PER_VERTEX, GL_FALSE ) > ); > >> >> > geom->setVertexAttribData( BINORMAL_ATR_UNIT, > >> osg::Geometry::ArrayData( > >> >> > tsg->getBinormalArray(), osg::Geometry::BIND_PER_VERTEX, GL_FALSE ) > ); > >> >> > bump->addBindAttribLocation( "rm_Tangent", TANGENT_ATR_UNIT ); > >> >> > bump->addBindAttribLocation( "rm_Binormal", BINORMAL_ATR_UNIT ); > >> >> > > >> >> > // Initialise Uniforms > >> >> > // Vertex shader > >> >> > osg::Vec3 Pos( 0, 0, 1000 ); > >> >> > stateset->addUniform( new osg::Uniform( "fvLightPosition", Pos ) > ); > >> >> > stateset->addUniform( new osg::Uniform( "fvEyePosition", Pos ) ); > >> >> > stateset->addUniform( new osg::Uniform( "bumpMap", BUMP_TEX_UNIT > ) > >> ); > >> >> > stateset->addUniform( new osg::Uniform( "bumpMap", BUMP_TEX_UNIT > ) > >> ); > >> >> > > >> >> > // Fragment shader > >> >> > stateset->addUniform( new osg::Uniform( "fvAmbient", osg::Vec4( > >> 0.36, > >> >> > 0.36, 0.36, 1.0 ) ) ); > >> >> > stateset->addUniform( new osg::Uniform( "fvSpecular", osg::Vec4( > >> 0.49, > >> >> > 0.49, 0.49, 1.0 ) ) ); > >> >> > stateset->addUniform( new osg::Uniform( "fvDiffuse", osg::Vec4( > >> 0.88, > >> >> > 0.88, 0.88, 1.0 ) ) ); > >> >> > stateset->addUniform( new osg::Uniform( "fSpecularPower", 100.0f > ) > >> ); > >> >> > > >> >> > return geode; > >> >> > } > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > On Mon, Nov 24, 2008 at 5:02 PM, Alejandro Aguilar Sierra < > >> >> > [EMAIL PROTECTED]> wrote: > >> >> > > >> >> >> Hi, > >> >> >> > >> >> >> I suggest you to see the osgshaders example (how osg deals with > glsl) > >> >> >> and then consult chapter 11 of the orange book (OpenGL shading > >> >> >> language). You can find the shaders used in the book at > >> >> >> http://3dshaders.com/ > >> >> >> > >> >> >> Hope it helps. > >> >> >> > >> >> >> -- A. > >> >> >> > >> >> >> On Mon, Nov 24, 2008 at 10:39 AM, Morné Pistorius > >> >> >> <[EMAIL PROTECTED]> wrote: > >> >> >> > Hi all, > >> >> >> > I added bump mapping to a model using osgFX::BumpMapping, but I > >> need > >> >> >> > something more flexible. My model has two sided lighting and > osgFX > >> >> >> doesn't > >> >> >> > support that. Do we have GLSL shaders for bumpmapping in OSG? > I > >> >> think > >> >> >> that > >> >> >> > would be easier to modify to suit my needs than the assembler > coded > >> >> >> shaders > >> >> >> > used in osgFX. If anyone has an example of applying normal > mapping > >> >> with > >> >> >> > shaders in OSG, I would greatly appreciate it. > >> >> >> > Thank you kindly, > >> >> >> > Morne > >> >> >> > _______________________________________________ > >> >> >> > osg-users mailing list > >> >> >> > [email protected] > >> >> >> > > >> >> >> > >> >> > >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >> >> >> > > >> >> >> > > >> >> >> _______________________________________________ > >> >> >> osg-users mailing list > >> >> >> [email protected] > >> >> >> > >> >> > >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >> >> > >> >> _______________________________________________ > >> >> osg-users mailing list > >> >> [email protected] > >> >> > >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >> > >> _______________________________________________ > >> osg-users mailing list > >> [email protected] > >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- Ümit Uzun
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