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Dion Moult
502c29fbc2
Drops the per-machine "guess the OOM ceiling" budget knob in favour of a single buffer pool whose capacity is *probed* at device-init time. The runtime answers the question: descend from min(maxBufferSize, 4 GB) through OOM error scopes, accept the largest size that allocates cleanly. On a desktop wgpu-native v29 box this lands at 2 GB; on browser-class platforms it'll land at 256 MB – 1 GB depending on the implementation. Same code path either way. Architecture: - WgpuBufferPool (new): single WGPUBuffer + free-list sub-allocator with adjacent-range coalescing and first-fit. 256 B alignment for storage-binding offsets. - Chunks now hold (pool_vertex_offset, pool_vertex_size) and (pool_index_offset, pool_index_size) instead of per-chunk WGPUBuffer handles. Load = pool.alloc + queueWriteBuffer. Unload = pool.free. - Bind groups bind pool_.buffer() at the chunk's specific (offset, size) for both the vertex and index storage bindings. - Eviction queries pool.largest_free_run_bytes() instead of a tracked budget; the two-phase LRU/distance evictor's policy is unchanged. What this fixes: - No more gpu-alloc-rs fragmentation OOM: one VkDeviceMemory block instead of N per-chunk blocks with rounding overhead. On the test dataset (~3 GB on disk, 562 k visible instances) the wgpu backend now runs through to render without OOM at any point. - No --streaming-vram-mb knob, no hardcoded budget constant, no per-machine calibration. The pool size adapts to whatever the runtime grants. Notes: - Error scope probing: wgpu-native v29 classifies "Not enough memory left" as WGPUErrorType_Validation, not OutOfMemory. We push both filters (nested) and treat either firing as probe failure. - The 4 GB probe cap is principled, not magic: above that, wgpu-native's advertised maxBufferSize is sometimes a sentinel (1 TB) that just forces wasteful halving steps. 4 GB is the largest buffer any realistic WebGPU implementation will grant a single allocation today. - Pool destroy()/release happens after model release in shutdown() so the underlying buffer outlives every bind group that references it. Follow-ups: spatial chunking (task #22) for finer eviction granularity; cull perf needs work at 100+ models / 1M+ instances (separate from streaming concerns). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
IfcOpenShell
IfcOpenShell is an open source (LGPL) software library for working with Industry Foundation Classes (IFC). Complete parsing support is provided for IFC2x3 TC1, IFC4 Add2 TC1, IFC4x1, IFC4x2, and IFC4x3 Add2. Extensive geometric support is implemented for the IFC releases IFC2x3 TC1 and IFC4 Add2 TC1. Extending with support for arbitrary IFC schemas is possible at compile-time when using C++ and at run-time when using Python.
In addition to a C++ and Python API, IfcOpenShell comes with an ecosystem of tools, notably including IfcConvert (an application to convert IFC models to other formats), Bonsai (an add-on to Blender providing a graphical IFC authoring platform), and many other libraries, CLI apps, and more. Support is also provided for auxiliary standards such as BCF and IDS.
For more information, see:
Development is sponsored through your generous donations!
Contents
| Name | Description | License | Service |
|---|---|---|---|
| bcf | Library to read and write BCF-XML and query OpenCDE BCF-API modules | LGPL-3.0-or-later |   |
| bonsai | Add-on to Blender providing a graphical native IFC authoring platform | GPL-3.0-or-later |    |
| bsdd | Library to query the bSDD API | LGPL-3.0-or-later |  |
| ifc2ca | Utility to convert IFC structural analysis models to Code_Aster | LGPL-3.0-or-later | |
| ifc4d | Convert to and from IFC and project management software | LGPL-3.0-or-later |  |
| ifc5d | Report and optimise cost information from IFC | LGPL-3.0-or-later |  |
| ifcbimtester | Wrapper for Gherkin based unit testing for IFC models | LGPL-3.0-or-later | |
| ifcblender | Historic Blender IFC import add-on | LGPL-3.0-or-later* | |
| ifccityjson | Convert CityJSON to IFC | LGPL-3.0-or-later |  |
| ifcclash | Clash detection library and CLI app | LGPL-3.0-or-later |  |
| ifcconvert | CLI app to convert IFC to many other formats | LGPL-3.0-or-later* |   |
| ifccsv | Library and CLI app to export and import schedules from IFC | LGPL-3.0-or-later |  |
| ifcdiff | Compare changes between IFC models | LGPL-3.0-or-later |  |
| ifcedit | CLI wrapper for ifcopenshell.api IFC model mutation functions | LGPL-3.0-or-later |  |
| ifcfm | Extract IFC data for FM handover requirements | LGPL-3.0-or-later |  |
| ifcmax | Historic extension for IFC support in 3DS Max | LGPL-3.0-or-later* | |
| ifcmcp | MCP server for querying and editing IFC building models | LGPL-3.0-or-later |  |
| ifcopenshell-python | Python library for IFC manipulation | LGPL-3.0-or-later* |         |
| ifcpatch | Utility to run pre-packaged scripts to manipulate IFCs | LGPL-3.0-or-later |  |
| ifcquery | CLI tool for querying and inspecting IFC building models | LGPL-3.0-or-later |  |
| ifcsverchok | Blender Add-on for visual node programming with IFC | GPL-3.0-or-later |  |
| ifctester | Library, CLI and webapp for IDS model auditing | LGPL-3.0-or-later |  |
The IfcOpenShell C++ codebase is split into multiple interal libraries:
| Name | Description | License |
|---|---|---|
| ifcgeom | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcgeom_schema_agnostic | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcgeomserver | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcjni | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcparse | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcwrap | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| qtviewer | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| serializers | Internal library for IfcOpenShell | LGPL-3.0-or-later* |