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QVR: a library for Virtual Reality applications

Introduction

QVR is a library that makes writing Virtual Reality (VR) applications very easy. It is based on Qt and requires no other libraries.

QVR manages all graphics views required for a VR application, based on a configuration for the target VR environment, from multi-node multi-GPU render clusters to head-mounted displays such as the HTC Vive. A simple change of the configuration file makes the same application run on a completely different setup.

The application only needs to implement a single interface with just a few easily understandable functions. All rendering happens in a single OpenGL context so that there are no context switching and sharing issues. Furthermore the application does not need to care about threads, but is still free to implement any threading model.

QVR allows writing VR applications in pure OpenGL as well as using arbitrary external rendering engines. Examples are provided.

Supported platforms and hardware

The library should work on every platform that has Qt (i.e. all the platforms). Currently tested are Linux, Windows, and Android.

Supported VR hardware includes:

  • Custom large-scale VR labs with multiple GPUs and/or render clusters

  • HTC Vive and SteamVR with OpenVR on both Linux and Windows

  • Oculus Rift with Oculus SDK

  • Google Cardboard and Daydream with Google VR NDK

  • Almost all tracking and interaction hardware with VRPN

The library

Build and install the QVR library libqvr first. After that, you can build and try the example applications.

See the library documentation.

There is also an introductory presentation explaining the concepts of libqvr and how to use it, and a short paper from the Eurographics 2016 Education track explaining the motivation behind it.

Example applications

  • qvr-example-opengl-minimal: a minimal OpenGL-based example application that displays a rotating box.

  • qvr-example-opengl: a simple demo scene based on OpenGL.

  • qvr-example-openscenegraph: a full-featured OpenSceneGraph viewer.

  • qvr-example-vtk: a simple example of a VTK visualization pipeline within a QVR application.

  • qvr-sceneviewer: a viewer for 3D models and scenes in many file formats.

  • qvr-videoplayer: a video screen in the virtual world, for 2D and 3D videos.

  • qvr-vncviewer: a VNC viewer. Put a remote desktop in your virtual world!

  • qvr-identify-displays: a small utility to check the configuration and left/right channel separation.

About

Virtual Reality abstraction library with sample applications, based on Qt

marlam.de/qvr

Topics

openglqtstereoscopic-3dvritual-reality

Resources

Readme
MIT license
Activity

Stars

12 stars

Watchers

2 watching

Forks

3 forks
Report repository

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
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QVR: a library for Virtual Reality applications
Introduction
QVR is a library that makes writing Virtual Reality (VR) applications very easy.
It is based on Qt and requires no other libraries.
QVR manages all graphics views required for a VR application, based on a
configuration for the target VR environment, from multi-node multi-GPU render
clusters to head-mounted displays such as the HTC Vive. A simple change
of the configuration file makes the same application run on a completely
different setup.
The application only needs to implement a single interface with just a few
easily understandable functions. All rendering happens in a single OpenGL
context so that there are no context switching and sharing issues. Furthermore
the application does not need to care about threads, but is still free to
implement any threading model.
QVR allows writing VR applications in pure OpenGL as well as using arbitrary
external rendering engines. Examples are provided.
Supported platforms and hardware
The library should work on every platform that has Qt (i.e. all the platforms).
Currently tested are Linux, Windows, and Android.
Supported VR hardware includes:
  • Custom large-scale VR labs with multiple GPUs and/or render clusters
  • HTC Vive and SteamVR with OpenVR on both Linux and Windows
  • Oculus Rift with Oculus SDK
  • Google Cardboard and Daydream with Google VR NDK
  • Almost all tracking and interaction hardware with VRPN
The library
Build and install the QVR library libqvr first. After that, you can build
and try the example applications.
See the library documentation.
There is also an introductory presentation
explaining the concepts of libqvr and how to use it, and a
short paper from the Eurographics
2016 Education track explaining the motivation behind it.
Example applications
  • qvr-example-opengl-minimal:
a minimal OpenGL-based example application that displays a rotating box.
  • qvr-example-opengl:
a simple demo scene based on OpenGL.
  • qvr-example-openscenegraph:
a full-featured OpenSceneGraph viewer.
  • qvr-example-vtk:
a simple example of a VTK visualization pipeline within
a QVR application.
  • qvr-sceneviewer:
a viewer for 3D models and scenes in many file formats.
  • qvr-videoplayer:
a video screen in the virtual world, for 2D and 3D videos.
  • qvr-vncviewer: a VNC
viewer. Put a remote desktop in your virtual world!
  • qvr-identify-displays:
a small utility to check the configuration and left/right channel separation.
About
Virtual Reality abstraction library with sample applications, based on Qt
marlam.de/qvr
Topics
openglqtstereoscopic-3dvritual-reality
Resources
Readme
MIT license
Activity
Stars
12 stars
Watchers
2 watching
Forks
3 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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QVR: a library for Virtual Reality applications
Introduction
QVR is a library that makes writing Virtual Reality (VR) applications very easy.
It is based on Qt and requires no other libraries.
QVR manages all graphics views required for a VR application, based on a
configuration for the target VR environment, from multi-node multi-GPU render
clusters to head-mounted displays such as the HTC Vive. A simple change
of the configuration file makes the same application run on a completely
different setup.
The application only needs to implement a single interface with just a few
easily understandable functions. All rendering happens in a single OpenGL
context so that there are no context switching and sharing issues. Furthermore
the application does not need to care about threads, but is still free to
implement any threading model.
QVR allows writing VR applications in pure OpenGL as well as using arbitrary
external rendering engines. Examples are provided.
Supported platforms and hardware
The library should work on every platform that has Qt (i.e. all the platforms).
Currently tested are Linux, Windows, and Android.
Supported VR hardware includes:
  • Custom large-scale VR labs with multiple GPUs and/or render clusters
  • HTC Vive and SteamVR with OpenVR on both Linux and Windows
  • Oculus Rift with Oculus SDK
  • Google Cardboard and Daydream with Google VR NDK
  • Almost all tracking and interaction hardware with VRPN
The library
Build and install the QVR library libqvr first. After that, you can build
and try the example applications.
See the library documentation.
There is also an introductory presentation
explaining the concepts of libqvr and how to use it, and a
short paper from the Eurographics
2016 Education track explaining the motivation behind it.
Example applications
  • qvr-example-opengl-minimal:
a minimal OpenGL-based example application that displays a rotating box.
  • qvr-example-opengl:
a simple demo scene based on OpenGL.
  • qvr-example-openscenegraph:
a full-featured OpenSceneGraph viewer.
  • qvr-example-vtk:
a simple example of a VTK visualization pipeline within
a QVR application.
  • qvr-sceneviewer:
a viewer for 3D models and scenes in many file formats.
  • qvr-videoplayer:
a video screen in the virtual world, for 2D and 3D videos.
  • qvr-vncviewer: a VNC
viewer. Put a remote desktop in your virtual world!
  • qvr-identify-displays:
a small utility to check the configuration and left/right channel separation.
About
Virtual Reality abstraction library with sample applications, based on Qt
marlam.de/qvr
Topics
openglqtstereoscopic-3dvritual-reality
Resources
Readme
MIT license
Activity
Stars
12 stars
Watchers
2 watching
Forks
3 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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QVR: a library for Virtual Reality applications
Introduction
QVR is a library that makes writing Virtual Reality (VR) applications very easy.
It is based on Qt and requires no other libraries.
QVR manages all graphics views required for a VR application, based on a
configuration for the target VR environment, from multi-node multi-GPU render
clusters to head-mounted displays such as the HTC Vive. A simple change
of the configuration file makes the same application run on a completely
different setup.
The application only needs to implement a single interface with just a few
easily understandable functions. All rendering happens in a single OpenGL
context so that there are no context switching and sharing issues. Furthermore
the application does not need to care about threads, but is still free to
implement any threading model.
QVR allows writing VR applications in pure OpenGL as well as using arbitrary
external rendering engines. Examples are provided.
Supported platforms and hardware
The library should work on every platform that has Qt (i.e. all the platforms).
Currently tested are Linux, Windows, and Android.
Supported VR hardware includes:
  • Custom large-scale VR labs with multiple GPUs and/or render clusters
  • HTC Vive and SteamVR with OpenVR on both Linux and Windows
  • Oculus Rift with Oculus SDK
  • Google Cardboard and Daydream with Google VR NDK
  • Almost all tracking and interaction hardware with VRPN
The library
Build and install the QVR library libqvr first. After that, you can build
and try the example applications.
See the library documentation.
There is also an introductory presentation
explaining the concepts of libqvr and how to use it, and a
short paper from the Eurographics
2016 Education track explaining the motivation behind it.
Example applications
  • qvr-example-opengl-minimal:
a minimal OpenGL-based example application that displays a rotating box.
  • qvr-example-opengl:
a simple demo scene based on OpenGL.
  • qvr-example-openscenegraph:
a full-featured OpenSceneGraph viewer.
  • qvr-example-vtk:
a simple example of a VTK visualization pipeline within
a QVR application.
  • qvr-sceneviewer:
a viewer for 3D models and scenes in many file formats.
  • qvr-videoplayer:
a video screen in the virtual world, for 2D and 3D videos.
  • qvr-vncviewer: a VNC
viewer. Put a remote desktop in your virtual world!
  • qvr-identify-displays:
a small utility to check the configuration and left/right channel separation.
About
Virtual Reality abstraction library with sample applications, based on Qt
marlam.de/qvr
Topics
openglqtstereoscopic-3dvritual-reality
Resources
Readme
MIT license
Activity
Stars
12 stars
Watchers
2 watching
Forks
3 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
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QVR: a library for Virtual Reality applications
Introduction
QVR is a library that makes writing Virtual Reality (VR) applications very easy.
It is based on Qt and requires no other libraries.
QVR manages all graphics views required for a VR application, based on a
configuration for the target VR environment, from multi-node multi-GPU render
clusters to head-mounted displays such as the HTC Vive. A simple change
of the configuration file makes the same application run on a completely
different setup.
The application only needs to implement a single interface with just a few
easily understandable functions. All rendering happens in a single OpenGL
context so that there are no context switching and sharing issues. Furthermore
the application does not need to care about threads, but is still free to
implement any threading model.
QVR allows writing VR applications in pure OpenGL as well as using arbitrary
external rendering engines. Examples are provided.
Supported platforms and hardware
The library should work on every platform that has Qt (i.e. all the platforms).
Currently tested are Linux, Windows, and Android.
Supported VR hardware includes:
  • Custom large-scale VR labs with multiple GPUs and/or render clusters
  • HTC Vive and SteamVR with OpenVR on both Linux and Windows
  • Oculus Rift with Oculus SDK
  • Google Cardboard and Daydream with Google VR NDK
  • Almost all tracking and interaction hardware with VRPN
The library
Build and install the QVR library libqvr first. After that, you can build
and try the example applications.
See the library documentation.
There is also an introductory presentation
explaining the concepts of libqvr and how to use it, and a
short paper from the Eurographics
2016 Education track explaining the motivation behind it.
Example applications
  • qvr-example-opengl-minimal:
a minimal OpenGL-based example application that displays a rotating box.
  • qvr-example-opengl:
a simple demo scene based on OpenGL.
  • qvr-example-openscenegraph:
a full-featured OpenSceneGraph viewer.
  • qvr-example-vtk:
a simple example of a VTK visualization pipeline within
a QVR application.
  • qvr-sceneviewer:
a viewer for 3D models and scenes in many file formats.
  • qvr-videoplayer:
a video screen in the virtual world, for 2D and 3D videos.
  • qvr-vncviewer: a VNC
viewer. Put a remote desktop in your virtual world!
  • qvr-identify-displays:
a small utility to check the configuration and left/right channel separation.
About
Virtual Reality abstraction library with sample applications, based on Qt
marlam.de/qvr
Topics
openglqtstereoscopic-3dvritual-reality
Resources
Readme
MIT license
Activity
Stars
12 stars
Watchers
2 watching
Forks
3 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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QVR: a library for Virtual Reality applications
Introduction
QVR is a library that makes writing Virtual Reality (VR) applications very easy.
It is based on Qt and requires no other libraries.
QVR manages all graphics views required for a VR application, based on a
configuration for the target VR environment, from multi-node multi-GPU render
clusters to head-mounted displays such as the HTC Vive. A simple change
of the configuration file makes the same application run on a completely
different setup.
The application only needs to implement a single interface with just a few
easily understandable functions. All rendering happens in a single OpenGL
context so that there are no context switching and sharing issues. Furthermore
the application does not need to care about threads, but is still free to
implement any threading model.
QVR allows writing VR applications in pure OpenGL as well as using arbitrary
external rendering engines. Examples are provided.
Supported platforms and hardware
The library should work on every platform that has Qt (i.e. all the platforms).
Currently tested are Linux, Windows, and Android.
Supported VR hardware includes:
  • Custom large-scale VR labs with multiple GPUs and/or render clusters
  • HTC Vive and SteamVR with OpenVR on both Linux and Windows
  • Oculus Rift with Oculus SDK
  • Google Cardboard and Daydream with Google VR NDK
  • Almost all tracking and interaction hardware with VRPN
The library
Build and install the QVR library libqvr first. After that, you can build
and try the example applications.
See the library documentation.
There is also an introductory presentation
explaining the concepts of libqvr and how to use it, and a
short paper from the Eurographics
2016 Education track explaining the motivation behind it.
Example applications
  • qvr-example-opengl-minimal:
a minimal OpenGL-based example application that displays a rotating box.
  • qvr-example-opengl:
a simple demo scene based on OpenGL.
  • qvr-example-openscenegraph:
a full-featured OpenSceneGraph viewer.
  • qvr-example-vtk:
a simple example of a VTK visualization pipeline within
a QVR application.
  • qvr-sceneviewer:
a viewer for 3D models and scenes in many file formats.
  • qvr-videoplayer:
a video screen in the virtual world, for 2D and 3D videos.
  • qvr-vncviewer: a VNC
viewer. Put a remote desktop in your virtual world!
  • qvr-identify-displays:
a small utility to check the configuration and left/right channel separation.
About
Virtual Reality abstraction library with sample applications, based on Qt
marlam.de/qvr
Topics
openglqtstereoscopic-3dvritual-reality
Resources
Readme
MIT license
Activity
Stars
12 stars
Watchers
2 watching
Forks
3 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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QVR: a library for Virtual Reality applications
Introduction
QVR is a library that makes writing Virtual Reality (VR) applications very easy.
It is based on Qt and requires no other libraries.
QVR manages all graphics views required for a VR application, based on a
configuration for the target VR environment, from multi-node multi-GPU render
clusters to head-mounted displays such as the HTC Vive. A simple change
of the configuration file makes the same application run on a completely
different setup.
The application only needs to implement a single interface with just a few
easily understandable functions. All rendering happens in a single OpenGL
context so that there are no context switching and sharing issues. Furthermore
the application does not need to care about threads, but is still free to
implement any threading model.
QVR allows writing VR applications in pure OpenGL as well as using arbitrary
external rendering engines. Examples are provided.
Supported platforms and hardware
The library should work on every platform that has Qt (i.e. all the platforms).
Currently tested are Linux, Windows, and Android.
Supported VR hardware includes:
  • Custom large-scale VR labs with multiple GPUs and/or render clusters
  • HTC Vive and SteamVR with OpenVR on both Linux and Windows
  • Oculus Rift with Oculus SDK
  • Google Cardboard and Daydream with Google VR NDK
  • Almost all tracking and interaction hardware with VRPN
The library
Build and install the QVR library libqvr first. After that, you can build
and try the example applications.
See the library documentation.
There is also an introductory presentation
explaining the concepts of libqvr and how to use it, and a
short paper from the Eurographics
2016 Education track explaining the motivation behind it.
Example applications
  • qvr-example-opengl-minimal:
a minimal OpenGL-based example application that displays a rotating box.
  • qvr-example-opengl:
a simple demo scene based on OpenGL.
  • qvr-example-openscenegraph:
a full-featured OpenSceneGraph viewer.
  • qvr-example-vtk:
a simple example of a VTK visualization pipeline within
a QVR application.
  • qvr-sceneviewer:
a viewer for 3D models and scenes in many file formats.
  • qvr-videoplayer:
a video screen in the virtual world, for 2D and 3D videos.
  • qvr-vncviewer: a VNC
viewer. Put a remote desktop in your virtual world!
  • qvr-identify-displays:
a small utility to check the configuration and left/right channel separation.
About
Virtual Reality abstraction library with sample applications, based on Qt
marlam.de/qvr
Topics
openglqtstereoscopic-3dvritual-reality
Resources
Readme
MIT license
Activity
Stars
12 stars
Watchers
2 watching
Forks
3 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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QVR: a library for Virtual Reality applications
Introduction
QVR is a library that makes writing Virtual Reality (VR) applications very easy.
It is based on Qt and requires no other libraries.
QVR manages all graphics views required for a VR application, based on a
configuration for the target VR environment, from multi-node multi-GPU render
clusters to head-mounted displays such as the HTC Vive. A simple change
of the configuration file makes the same application run on a completely
different setup.
The application only needs to implement a single interface with just a few
easily understandable functions. All rendering happens in a single OpenGL
context so that there are no context switching and sharing issues. Furthermore
the application does not need to care about threads, but is still free to
implement any threading model.
QVR allows writing VR applications in pure OpenGL as well as using arbitrary
external rendering engines. Examples are provided.
Supported platforms and hardware
The library should work on every platform that has Qt (i.e. all the platforms).
Currently tested are Linux, Windows, and Android.
Supported VR hardware includes:
  • Custom large-scale VR labs with multiple GPUs and/or render clusters
  • HTC Vive and SteamVR with OpenVR on both Linux and Windows
  • Oculus Rift with Oculus SDK
  • Google Cardboard and Daydream with Google VR NDK
  • Almost all tracking and interaction hardware with VRPN
The library
Build and install the QVR library libqvr first. After that, you can build
and try the example applications.
See the library documentation.
There is also an introductory presentation
explaining the concepts of libqvr and how to use it, and a
short paper from the Eurographics
2016 Education track explaining the motivation behind it.
Example applications
  • qvr-example-opengl-minimal:
a minimal OpenGL-based example application that displays a rotating box.
  • qvr-example-opengl:
a simple demo scene based on OpenGL.
  • qvr-example-openscenegraph:
a full-featured OpenSceneGraph viewer.
  • qvr-example-vtk:
a simple example of a VTK visualization pipeline within
a QVR application.
  • qvr-sceneviewer:
a viewer for 3D models and scenes in many file formats.
  • qvr-videoplayer:
a video screen in the virtual world, for 2D and 3D videos.
  • qvr-vncviewer: a VNC
viewer. Put a remote desktop in your virtual world!
  • qvr-identify-displays:
a small utility to check the configuration and left/right channel separation.
About
Virtual Reality abstraction library with sample applications, based on Qt
marlam.de/qvr
Topics
openglqtstereoscopic-3dvritual-reality
Resources
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MIT license
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