Browser column lists all scene materials plus a searchable create-node
list; Show Graph (or double-click) loads a material into the node-graph
work area. The graph shows the entire network including MaterialX
(.mtlx) node graphs, resolving connections through NodeGraph boundaries
via UsdShadeUtils::GetValueProducingAttributes, with layered auto-layout
for nodes lacking authored uiPosition. Canvas navigates viewport-style
(Alt+MMB pan / Alt+RMB zoom) and TAB opens a Nuke-style search popup.
Selecting a node shows a typed property editor (live-apply, one undo
command per edit) and previews that node's output on the shader ball.
The preview renders through its own Hydra engine into a scratch stage
that composes the material via a reference to the source root layer (so
referenced .mtlx materials work), re-renders until progressive delegates
(Arnold/Cycles/Embree) converge, and lights with HDR dome presets
(External/Room/Interior/Sunset; CC0 Poly Haven EXRs fetched at CMake
configure). texture:format is authored latlong explicitly - left
automatic, hdArnold falls back to Arnold's angular fisheye default -
and hdCycles gets a -90 X pole rotation to match Storm's +Y-pole
sampling.
Mutations go through new ICommand subclasses (create shader node,
connect/disconnect attrs). imgui-node-editor is vendored (gitignored)
with a local one-line patch: c_ScrollButtonIndex 1->2 for MMB pan.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Exposes UsdImagingGLCullStyle as a Cull Style sub-menu in the gear popup
(Back Unless Double-Sided / Back / Front / Nothing / No Opinion). Defaults
to BackUnlessDoubleSided, matching usdview. Setting persists per-viewport
to viewport_settings.ini.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Exposes UsdGeomImageable purpose visibility as three per-viewport toggles
in the gear popup (Purpose: Guide / Proxy / Render), wired to
showGuides/showProxy/showRender on UsdImagingGLRenderParams. Defaults match
the USD render params defaults (Proxy on, Guide and Render off). Settings
persist per-viewport to viewport_settings.ini.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Surfaces each render delegate's settings (FLAG/INT/FLOAT/STRING) in a
per-viewport floating dialog opened from the gear popup. Settings are grouped
into tabs by key namespace prefix (split at ':'); unprefixed keys go into
General. Changes apply immediately; Reset Defaults restores defValues.
Settings list is cached per delegate to avoid TF_WARN flooding the log on
every frame.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Exposes the render delegate's available AOVs in the gear popup under a new
"AOV" sub-menu. Selecting an AOV calls SetRendererAov on the engine and
persists the choice per-viewport in viewport_settings.ini. Switching the
render delegate resets the AOV to "color", matching stageView.py's
_handleRendererChanged. Menu is greyed-out when the delegate reports no AOVs.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds a per-viewport "Camera Guide" toggle (default off) that draws a full
frustum wireframe box (near quad + far quad + 4 connecting edges) in oracle
orange for every non-active UsdGeomCamera prim, matching usdview's
displayCameraOracles behaviour. Uses GfFrustum::ComputeCorners() and the
same 24-index line layout as DrawCameraGuides. Toggle exposed in the
right-click context menu and gear popup; persists to INI as ShowCameraGuide.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Remove the custom GL post-process (ViewportColorCorrector) that bypassed
HdxColorCorrectionTask. Instead pass colorCorrectionMode, ocioDisplay,
ocioView, ocioColorSpace, and ocioLook directly to UsdImagingGLRenderParams
and SetColorCorrectionSettings(), delegating correction to Hydra —
the same approach used in usdview's stageView.renderSinglePass().
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Preferences (Edit > Preferences, tabbed General/Animation/Viewport):
- Viewport tab: Default Render Delegate and Color Correction settings
- Persisted to %APPDATA%\UsdLayerManager\preferences.ini
- Render delegate: startup default only (not live-applied to running tiles)
- Color correction: global, applied live to all viewports on change
Render delegate per-viewport:
- Each tile toolbar switches its own delegate independently
- Saved per-tile in viewport_settings.ini; restored on next launch
- Tiles with no saved delegate get the pref default on startup
Color correction global:
- Removed from gear popup; lives in Preferences > Viewport only
- Applied to all tiles on init and on live change from Preferences
Fix InitRenderer always applying m_currentRendererPlugin when set,
rather than skipping when UsdImagingGLEngine auto-selects a default.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Hydra's HdxColorCorrectionTask rendered prims black in OCIO mode and could
corrupt the GlfDrawTarget bind stack on failure (skipping Unbind), blacking
out every later frame including sRGB. Replace it with our own GL post-process:
the scene renders linear (RGBA16F) and is corrected by a fullscreen shader --
linear->sRGB encode, or OCIO via the OCIO 2.1 GPU API (GpuShaderDesc plus
uploaded 1D/3D LUT textures). OCIO build failures fall back to sRGB (never
black) and USD diagnostics are routed to the app log.
- core: ViewportColorCorrector + ApplyViewportColorCorrection in UsdSceneRenderer
- utils: OcioConfigParser enumerates displays/views/colorspaces/looks from $OCIO
- ui: gear-menu OCIO controls (ViewportTile) + per-viewport persistence (ViewportPanel)
- Application: point $OCIO at the bundled ACES 1.2 config
- CMake: link/copy OpenColorIO, download ACES 1.2 config; plus hdCycles build
config (disable OpenVDB/Embree, fix TBB/OpenSubdiv/Imath dirs, exclude CRT DLLs)
- main: pre-flight plugin DLL load check to skip plugins with missing deps
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Adds a ⚙ icon button to the right of the AA toggle in each viewport
tile's compact toolbar. Clicking it opens a dropdown with:
- Shading submenu: Smooth Shaded / Flat Shaded / Wireframe on Surface /
Wireframe / Unlit (new ShadingMode enum driving UsdImagingGLDrawMode)
- Lighting submenu: Camera Headlight / Scene Lights + Dome Light toggle
- Show Grid and Anti-Aliasing toggles (mirrored from icon buttons)
- Bounding Box submenu: None / Per Object / All Selection
- Background submenu: Dark Gray / Black / Light Gray / Midnight Blue
ShadingMode is persisted in viewport_settings.ini alongside the existing
per-tile settings (saved on shutdown, restored on startup).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- TimelinePanel: Playblast button opens modal with output dir (native
folder picker via IFileOpenDialog), custom resolution (HD/FHD/4K
presets), frame range, and movie export toggle
- UsdSceneRenderer: CaptureFrame() reads pixels from resolved MSAA FBO;
Render() stores last dimensions for off-screen re-render at capture res
- MovieEncoder: streams RGBA frames directly into MP4 using libavcodec/
libswscale (H.264, tries libx264 → nvenc → qsv → amf → openh264)
- Application: CapturePlayblastFrame() re-renders at capture resolution
each frame; opens/writes/closes MovieEncoder inline with the render loop
- FileDialog: BrowseFolder() using Vista-style IFileOpenDialog (COM)
- CMake: FindFFmpeg.cmake locates prebuilt BtbN GPL shared package in
third_party/ffmpeg; links and copies DLLs for main and test targets
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Mirrors usdview behaviour -- when the stage has at least one UsdLux
light the default camera fill-light is disabled so the scene is lit
purely by its authored lights. StageHasAuthoredLights() early-exits
on the first HasAPI<UsdLuxLightAPI>() hit to keep the per-frame cost
minimal.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Draw a type-appropriate wireframe gizmo for every UsdLux light in the stage,
mirroring the existing camera-wireframe overlay (dedicated VAO/VBO reusing the
bbox shader, drawn on top with depth-test off).
Shapes, built in the light's local space and pushed through its local-to-world
transform:
- SphereLight 3 orthogonal circles (radius); axis-cross when treatAsPoint
- RectLight width x height rectangle + emission direction line
- DiskLight circle + direction line
- CylinderLight two end-cap circles + connectors (radius/length)
- DistantLight sun disc + parallel rays
- DomeLight 3 large display-scaled circles
Selected lights draw accent orange, others warm yellow.
Verified by creating a SphereLight (3-circle sphere) and a RectLight
(rectangle) in-app: distinct shapes, correct selected/deselected colours,
gizmos visible over geometry.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
indigo