Re: [osg-users] [osgPlugins] collada: use of bind_vertex_input
Hi, I've encoutered kmz files with dae files inside that look like that : Code: bind_material technique_common instance_material symbol=building_0 target=#building_0/instance_material instance_material symbol=building_1 target=#building_1 bind semantic=CHANNEL1 target=#b1-obj-tverts/bind /instance_material /technique_common /bind_material The texture coords are not loaded. If I add a bind_vertex_input element, textures works. Code: bind_material technique_common instance_material symbol=building_0 target=#building_0/instance_material instance_material symbol=building_1 target=#building_1 bind semantic=CHANNEL1 target=#b1-obj-tverts/bind bind_vertex_input semantic=CHANNEL1 input_semantic=TEXCOORD input_set=1/ /instance_material /technique_common /bind_material Do someone know what's happening ? Is it a problem in the file or the dae reader ? The file is opened correctly in GoogleEarth. Thank you! Cheers, Luc -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30846#30846 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [osgPlugins] collada: use of bind_vertex_input
lucfrauciel wrote: Hi, I've encoutered kmz files with dae files inside that look like that : Code: bind_material technique_common instance_material symbol=building_0 target=#building_0/instance_material instance_material symbol=building_1 target=#building_1 bind semantic=CHANNEL1 target=#b1-obj-tverts/bind /instance_material /technique_common /bind_material The texture coords are not loaded. If I add a bind_vertex_input element, textures works. Code: bind_material technique_common instance_material symbol=building_0 target=#building_0/instance_material instance_material symbol=building_1 target=#building_1 bind semantic=CHANNEL1 target=#b1-obj-tverts/bind bind_vertex_input semantic=CHANNEL1 input_semantic=TEXCOORD input_set=1/ /instance_material /technique_common /bind_material Do someone know what's happening ? Is it a problem in the file or the dae reader ? The file is opened correctly in GoogleEarth. Thank you! Cheers, Luc The issue is similar to : http://forum.openscenegraph.org/viewtopic.php?t=2676 (more recent thread) -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30855#30855 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] [osgPlugins] collada: use of bind_vertex_input
Hi, I export from Max using the feeling exporter 3.05b (c gives the same results). I have a diffuse map and an ambient map in my model. When importing the collada file into osg, the maps are not shown. It seems that I have to modify [code]instance_material symbol=r8.3.007_1 target=#r8.3.007-material/[/code] to [code] instance_material symbol=r8.3.007_1 target=#r8.3.007-material bind_vertex_input semantic=CHANNEL2 input_semantic=TEXCOORD input_set=2/ bind_vertex_input semantic=CHANNEL1 input_semantic=TEXCOORD input_set=1/ /instance_material [/code] Then everything works as expected. Is this faulty behavior of the exporter? The collada 1.4 spec says: [quote] The bind_vertex_input element binds geometry vertex streams (identified as input elements within geometry elements) to material effect vertex stream semantics. Although applications commonly perform automatic binding of vertex streams with identical semantic identifiers, there are frequently mismatches in a semantic identifier’s meaning. Use bind_vertex_input to remove these ambiguities [/quote] So maybe the exporter could detect texture coordinate sets automatically? Thanks, Martin[/quote] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10711#10711 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [osgPlugins] collada: use of bind_vertex_input
Martin Scheffler wrote: Hi, I export from Max using the feeling exporter 3.05b (c gives the same results). I have a diffuse map and an ambient map in my model. When importing the collada file into osg, the maps are not shown. It seems that I have to modify [code]instance_material symbol="r8.3.007_1" target="#r8.3.007-material"/[/code] to [code] instance_material symbol="r8.3.007_1" target="#r8.3.007-material" bind_vertex_input semantic="CHANNEL2" input_semantic="TEXCOORD" input_set="2"/ bind_vertex_input semantic="CHANNEL1" input_semantic="TEXCOORD" input_set="1"/ /instance_material [/code] Then everything works as expected. Is this faulty behavior of the exporter? The collada 1.4 spec says: [quote] The bind_vertex_input element binds geometry vertex streams (identified as input elements within geometry elements) to material effect vertex stream semantics. Although applications commonly perform automatic binding of vertex streams with identical semantic identifiers, there are frequently mismatches in a semantic identifier’s meaning. Use bind_vertex_input to remove these ambiguities [/quote] So maybe the exporter could detect texture coordinate sets automatically? Thanks, Martin[/quote] Martin, When I added the support for bind_vertex_input I am afraid I was quite strict in requiring it to be present. I admit if there if there was only one vertex stream with a CHANNEL1 or a CHANNEL2 semantic available then probably the binding should be automatic. However, in this case it looks like the exporter is still at fault as the the streams appear to have been given a TEXCOORD semantic, and because there are two of them then a bind_vertex_input is definitely needed to differentiate between the input sets. Roger ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
