Re: [osg-users] GeometryTechnique and texture coordinates
Hi Robert, Thank you. Works like a charm. I mixed up Terrain and TerrainTile, and since the top-level node of the osgdem is a Terrain, it was a piece of cake ;-) On 2 April 2014 15:55, Sebastian Messerschmidt sebastian.messerschm...@gmx.de mailto:sebastian.messerschm...@gmx.de wrote: Hi Robert, Thanks for the quick response. This means a lot of code duplication and I guess I will have to traverse every tile for Terrain nodes. No, the design is meant that your just assign your custom TerrainTechnique to the Terrain node that decorates the terrain scene graph. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] GeometryTechnique and texture coordinates
On 3 April 2014 08:15, Sebastian Messerschmidt sebastian.messerschm...@gmx.de wrote: Thank you. Works like a charm. I mixed up Terrain and TerrainTile, and since the top-level node of the osgdem is a Terrain, it was a piece of cake ;-) Great to hear that it worked out, as nature intended :-) ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] GeometryTechnique and texture coordinates
Hi, I have geocentric dataset (which is already compiled with osgDEM) and I'm facing an issue. In my shaders I rely on valid texture coordinates for tangentSpace generation and various other effects like detail-splatting. Unfortunately (and quite obvious due to performance restrictions) the GeometryTechnique will not create texture coordinates for Terrain tiles without textures. Due to missing LandSat-data at this areas, there are no images for those areas. (see around line 484 in GeometryTechnique.cpp) I wonder if there are any other options than a) modifying the VertexNormalGenerator::populateCenter function to create texture coordinates anyways b) Overriding the GeometryTechnique to use a custom VertexNormalGenerator which clones the functionality of the original one + adding texture coordinates for tiles without ImageLayer. Since the dataset is quite big, so recompiling it is out of the question right now. Also it would be a performance killer to traverse the TerrainTile manually and re-add some fake image layer. My idea would be to change the vertexNormalGenerator to optionally create texture coordinates. But I don't have an idea yet how to get this option into it. Any hints, ideas? ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] GeometryTechnique and texture coordinates
Hi Sebastian, osgTerrain is designed to allow you to override the TerrainTechnique attached to the TerrainTile via the Terrain node that can be used to decorate the terrain. The Terrain::setTerrainTechniquePrototype(TerrainTechinque*) is used to set the TerrainTechnique that tiles should use. By default osgTerrain will use the GeometryTechnique but you provide your own implementation or subclass from GeometryTechnique. Robert. On 2 April 2014 15:38, Sebastian Messerschmidt sebastian.messerschm...@gmx.de wrote: Hi, I have geocentric dataset (which is already compiled with osgDEM) and I'm facing an issue. In my shaders I rely on valid texture coordinates for tangentSpace generation and various other effects like detail-splatting. Unfortunately (and quite obvious due to performance restrictions) the GeometryTechnique will not create texture coordinates for Terrain tiles without textures. Due to missing LandSat-data at this areas, there are no images for those areas. (see around line 484 in GeometryTechnique.cpp) I wonder if there are any other options than a) modifying the VertexNormalGenerator::populateCenter function to create texture coordinates anyways b) Overriding the GeometryTechnique to use a custom VertexNormalGenerator which clones the functionality of the original one + adding texture coordinates for tiles without ImageLayer. Since the dataset is quite big, so recompiling it is out of the question right now. Also it would be a performance killer to traverse the TerrainTile manually and re-add some fake image layer. My idea would be to change the vertexNormalGenerator to optionally create texture coordinates. But I don't have an idea yet how to get this option into it. Any hints, ideas? ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] GeometryTechnique and texture coordinates
Hi Robert, Thanks for the quick response. This means a lot of code duplication and I guess I will have to traverse every tile for Terrain nodes. I'll check it and see how it works out. cheers Sebastian Hi Sebastian, osgTerrain is designed to allow you to override the TerrainTechnique attached to the TerrainTile via the Terrain node that can be used to decorate the terrain. The Terrain::setTerrainTechniquePrototype(TerrainTechinque*) is used to set the TerrainTechnique that tiles should use. By default osgTerrain will use the GeometryTechnique but you provide your own implementation or subclass from GeometryTechnique. Robert. On 2 April 2014 15:38, Sebastian Messerschmidt sebastian.messerschm...@gmx.de mailto:sebastian.messerschm...@gmx.de wrote: Hi, I have geocentric dataset (which is already compiled with osgDEM) and I'm facing an issue. In my shaders I rely on valid texture coordinates for tangentSpace generation and various other effects like detail-splatting. Unfortunately (and quite obvious due to performance restrictions) the GeometryTechnique will not create texture coordinates for Terrain tiles without textures. Due to missing LandSat-data at this areas, there are no images for those areas. (see around line 484 in GeometryTechnique.cpp) I wonder if there are any other options than a) modifying the VertexNormalGenerator::populateCenter function to create texture coordinates anyways b) Overriding the GeometryTechnique to use a custom VertexNormalGenerator which clones the functionality of the original one + adding texture coordinates for tiles without ImageLayer. Since the dataset is quite big, so recompiling it is out of the question right now. Also it would be a performance killer to traverse the TerrainTile manually and re-add some fake image layer. My idea would be to change the vertexNormalGenerator to optionally create texture coordinates. But I don't have an idea yet how to get this option into it. Any hints, ideas? ___ osg-users mailing list osg-users@lists.openscenegraph.org mailto:osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] GeometryTechnique and texture coordinates
On 2 April 2014 15:55, Sebastian Messerschmidt sebastian.messerschm...@gmx.de wrote: Hi Robert, Thanks for the quick response. This means a lot of code duplication and I guess I will have to traverse every tile for Terrain nodes. No, the design is meant that your just assign your custom TerrainTechnique to the Terrain node that decorates the terrain scene graph. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
