etwenandClaude Opus 4.8
3556e25e96
BBoxDump prints per-leaf world-space bounding boxes (to work out each connector's mating-face axis); wired as `SmokeTest --bbox <file>`. Also tracks the previously untracked v0.3.1 release notes. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
57 lines
3.0 KiB
Markdown
57 lines
3.0 KiB
Markdown
# v0.3.1 — First public release: 3D STEP viewer with measurement & assembly fit-check
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A lightweight Windows desktop viewer for STEP / STL / DXF — open a part, measure it,
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and check how two parts fit together, without firing up a heavyweight CAD suite.
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## ✨ New features
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**View & assembly tree**
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* Import multiple CAD files at once (STEP / STL / DXF) via the toolbar, drag-and-drop,
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or the command line (`STPViewer.exe a.stp b.stp`).
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* STEP product structure is rebuilt into an **assembly tree** — toggle visibility, recolor
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(cascades to children), and zoom-to any node; whole-file remove and outline-edge toggle.
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* Smooth orbit / zoom / pan even on large assemblies (hundreds of thousands of triangles).
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**Measurement** (pick a mode, click the model)
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* Point (snaps to nearby vertices), two-point distance + ΔX/ΔY/ΔZ, edge length
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(line / curve / arc with radius), face area + surface type, circle center / radius /
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diameter / circumference, angle between two faces or edges, and face-to-face minimum gap.
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* Edge length, radius and angle use **exact B-rep values**; area and gap are mesh-based.
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* Switch units **mm ⇄ inch** anytime — existing measurements and 3D labels convert live.
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**Assembly fit-check** (mate a male/female pair and verify)
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* **Two-point align** — click a point on the part to move, then the target point, to slide
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the whole file into place.
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* **Three-point align** — pick 3 feature points on each file to solve a full rotate+translate
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in one shot, for parts that aren't already oriented the same way.
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* **Axis rotate** — rotate the selected file ±90° about X / Y / Z to square it up.
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* **Drag mode** (hand cursor) — left-press a part and drag it along the screen plane.
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* **Gizmo** — XYZ arrows to move along an axis (independent of view angle, ideal for pushing
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along a mating axis) and rings to rotate any angle. The gizmo always renders on top, so it
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is never hidden inside a solid part.
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* **Interference check** — for two visible files, shows red intersection lines where they
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collide, or the minimum gap when they don't (gap ≈ 0 means a clean fit).
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**Section & export**
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* Section view along X / Y / Z with a position slider and flip, to inspect mating internals.
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* Export measurements to CSV (opens cleanly in Excel) and save a 2× PNG screenshot of the view.
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## 📦 Downloads
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Two builds are produced:
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| Build | Needs .NET 8 Desktop Runtime? | Notes |
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| **Standard** (`STPViewer_v0.3.1`) | ✅ Yes | Smaller; for machines that already have the runtime |
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| **Portable** (`STPViewer_v0.3.1_portable`) | ❌ No | Runtime bundled — unzip and run, no install / admin needed |
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Run `STPViewer v0.3.1.exe`.
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## 🔗 Links
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* Overview & usage:
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[README.md](https://github.com/ETWen/STPViewer/blob/main/README.md)
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* Architecture & design:
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[ARCHITECTURE.md](https://github.com/ETWen/STPViewer/blob/main/ARCHITECTURE.md)
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**Full changelog:** first public release — [commit history](https://github.com/ETWen/STPViewer/commits/v0.3.1)
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