On Tuesday 24 May 2016 10:36:30 Pierre Chicoine wrote: > I believe I read somewhere in connection with Qt3D that there was a more > organic object and texture type that loads faster into a mesh object that > did not go through a heavy parsing stage. Is that accurate or should we > continue to use obj or 3ds types for objects and jpg or png for textures?
For the Mesh element, Mauro is currently working on extending it to use a plugin system to support more than just OBJ. He is adding support for loading a named mesh from glTF initially but we may well add support for FBX too if we can find a nice way to handle the licensing around the fbx SDK. We may well also support a small binary format that is essentially a dump of the raw VBO + index data plus a small header describing it. This of course will require tooling to build such files at build time or as an offline step. We are looking at this for Qt 5.8. For textures, if your hardware supports it, there are various compressed texture formats - I've had good results with BC6/7 formats. You may also wish to assemble multiple tetxure images into a single texture file (and resulting object) e.g. by creating texture arrays, cubemaps, cubemap arrays, plus mipmaps and storing these into a single DDS file. We are also looking at adding cross platform tooling for creating such textures for 5.8. For now though, you'll need to use some other tools such as those provided by microsoft (see https://github.com/Microsoft/DirectXTex ). When using a lot of textures, the cost of performing the PNG decoding really adds up, but worse is the resulting memory usage. Compressed textures help with both. Cheers, Sean > > Pierre Chicoine -- Dr Sean Harmer | sean.har...@kdab.com | Managing Director UK Klarälvdalens Datakonsult AB, a KDAB Group company Tel. UK +44 (0)1625 809908, Sweden (HQ) +46-563-540090 KDAB - Qt Experts - Platform-independent software solutions _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
