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https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-09 17:31:45 +00:00
Dion Moult
8173074050
Mirrors GL ViewportWindow's section tool end-to-end. Hotkeys K toggle the tool active Shift+K clearSectionPlanes Esc deactivate the tool Del/Bksp remove the most recently added plane (tool-active only) LMB click pickSurfaceAt → addSectionPlaneAtSurface (no modifier) LMB drag on the arrow gizmo: slide the plane along its normal State FrameUniforms grows by clip_count (i32) + clip_planes[6] (vec4). The six-plane cap matches GL's MaxSectionPlanes. WGSL pads via three scalar i32s instead of a vec3<i32> so the array starts at offset 144 to match the tightly-packed C++ struct (240 B) — vec3 would have forced clip_planes to 160 and broken the binding-size match. is_section_clipped(world) in WGSL evaluates all active planes and returns true if any signals "on the positive side". Both main and pick fragments discard with it so cuts are visible AND selection is consistent — you can't pick something the user can't see. Surface pick Pick pass now emits 2 color targets: R32UInt object_id at @location(0) and RGBA16F packed world-space normal at @location(1). Normal is packed × 0.5 + 0.5 so unsigned-ish halfs keep the sign. pickSurfaceAt reads both via 1×1 texel copies (RGBA16F is a color format with no full-mip restriction, unlike Depth32Float). World position comes from ray-AABB intersection against the picked instance's AABB — equally accurate for "drop a plane where I clicked" and dodges the Depth32Float copy-extent rule entirely. The pick normal is decoded into the per-fragment surface normal so the plane lands perpendicular to the actual triangle (not the AABB face). Plane gizmo Identical geometry to GL's renderSectionPlanes: 2×2 m quad outline (white) + 1 m arrow shaft along +n (yellow-orange) + 4 arrow-head diagonals. Drawn inside the main MSAA pass with depth LessEqual + no depth write. Lines are rendered as screen-space-expanded thick quads with fwidth-based AA, same technique the axis indicator uses, so the gizmo reads against busy BIM geometry rather than disappearing as 1-px hairlines. Drag mousePressEvent claims a plain-LMB press if it hits an arrow gizmo (12 logical-px grab radius, distance to the (origin, origin+n) screen-space segment). The drag handler projects the cursor delta onto the screen-space axis and converts to metres via delta·axis / |axis|² — same formula GL uses. Mid-drag camera moves keep working because the projection re-runs every frame against the press-time origin. Closes the click-to-add + drag halves of #30 / #60. 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* |