PixSpace

A model viewer for projective Virtual Reality (VR).

PixSpace is a successor to the VisionSpace software, based on OpenSceneGraph, maintained at the HITLabNZ and the VisionSpaceNG, based on Unity at the Graphics and Interaction Lab.

PixSpace deals / plans to deal with:

• getting tracking data (position and orientation) from a VRPN server (OptiTrack or other)
• render composited stereo views allowing for non-linear distortions and overlapping screens
• loading 3D scene files (whatever bevy supports, ideally with asset reload on change)
• providing a simple way to extend the system with interactions and custom VR devices
• allow for RPC access to control scenes and settings

TODO

• custom projection matrices
• [~] build a system that updates a cameras frustum (w/ offaxis)
• [~] VRPN (https://github.com/seichter/vrpn-rs) - sync_client.rs seems to do what we need - issue it is Rust 2018
• multiple cameras
• render to texture

Contributions / Notes

Though, I am mostly writing this software on my own, I often ask for help and fortunately FOSS people will be happy to help

@bevy@mastodon.social suggested the following three examples

https://github.com/bevyengine/bevy/blob/main/examples/3d/two_passes.rs https://github.com/bevyengine/bevy/blob/main/examples/3d/split_screen.rs https://github.com/bevyengine/bevy/blob/main/examples/3d/render_to_texture.rs

And ria8651 on bevy #rendering Discord channel explained pointed me towards reversed Z frustum

further

https://thxforthefish.com/posts/reverse_z/ https://vincent-p.github.io/posts/vulkan_perspective_matrix/