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Hakan SevenandClaude Opus 4.7 de37ee04bf fix(scene): viewport auto-fit fallback + f64-precision projection

Three changes to make paper-space viewports render correctly on
UTM-scale drawings whose viewports were saved with default
view_target=(0, 0, 0) and a view_center pointing at empty WCS:

1. **Auto-fit fallback.** When the saved view's WCS rect doesn't
   overlap the IQR-bounded content cluster (`world_offset ±
   local_extent_max`), override `view_center` with `world_offset` and
   recompute `view_height` to fit the cluster into the paper viewport.
   Matches AutoCAD's silent auto-fit-on-open for stale / uninitialized
   viewports; without it those viewports rendered blank.

2. **f64 projection inner loop.** The previous f32 path computed
   `(wire_offset_rel - target_offset_rel).dot(view_right) -
   view_center` by subtracting values at ~5e6 magnitude (f32 ULP
   ~0.5 m) to land on a small paper offset. The cancellation produced
   centimetre-scale jitter on paper output even when the model was
   clean. Reconstruct the wire WCS coord, subtract the display center,
   and dot-project in f64; cast to f32 only at the final paper
   position where magnitudes are bounded by the viewport rect.

3. **examples/inspect_viewports.rs** — diagnostic that dumps every
   viewport's saved view fields (view_target, view_center, view_height
   vs paper height, custom_scale, status flags) plus drawing-level
   insertion_units and model-space extents. Used to verify that
   acadrust's DWG reader reads view_height correctly; the
   `view_height == vp.height` patterns observed on real files turn out
   to be genuine "default 1:1" file content rather than a reader bug
   (a round-trip test through DwgWriter / DwgReader survives all
   per-viewport values).

Also: switch the `acadrust` patch from `HakanSeven12/acadrust@feat/
expose-blockrecord-is-loaded` (a stale branch with the abandoned
is_loaded experiment) to `hakanaktt/acadrust@main`. Upstream main
now carries the layout paper-dimensions and mirrored-arc fixes that
this branch used to add — plus PR #20's DXF reading fixes that the
old branch was missing.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

2026-05-16 19:32:36 +03:00

.claude

feat: add local settings for Bash permissions

2026-04-30 10:01:17 +03:00

.github

ci: include version, OS and arch in release asset filenames

2026-04-24 10:13:11 +03:00

assets

feat: view tab widget toggle commands and unified SVG icon color scheme

2026-04-24 01:23:06 +03:00

examples

fix(scene): viewport auto-fit fallback + f64-precision projection

2026-05-16 19:32:36 +03:00

flatpak

chore: release v0.2.9

2026-05-16 13:04:58 +03:00

src

fix(scene): viewport auto-fit fallback + f64-precision projection

2026-05-16 19:32:36 +03:00

.gitignore

chore: exclude ROADMAP.md from version control

2026-04-06 23:28:04 +03:00

build.rs

feat: redesign View tab and fix Annotate/tab order

2026-04-09 12:25:15 +03:00

Cargo.lock

fix(scene): viewport auto-fit fallback + f64-precision projection

2026-05-16 19:32:36 +03:00

Cargo.toml

fix(scene): viewport auto-fit fallback + f64-precision projection

2026-05-16 19:32:36 +03:00

COMMANDS.md

docs: add COMMANDS.md and update ROADMAP.md in English

2026-04-09 20:06:35 +03:00

LICENSE

Initial commit

2026-03-22 14:53:51 +03:00

README.md

Update image in README.md

2026-05-12 22:26:34 +03:00

RENDERING_OPTIMIZATION.md

chore(scene): drop INSERT_SUB_LIMIT guard from fallback explode path

2026-05-15 23:53:26 +03:00

README.md

H7CAD

A CAD application for 2D drafting and 3D modeling, built with Rust. Reads and writes DWG and DXF files natively.

Features

File Formats

DWG read/write (R13 through R2018)
DXF read/write (R13 through R2018)
STL export (STLOUT / EXPORTSTL)
STEP AP203 export (STEPOUT)
OBJ import (IMPORTOBJ)
PDF export (plot layouts to PDF)
WBLOCK — write selected entities or a block to an external file
XREF — attach, reload, and auto-resolve external references

2D Drafting

Command	Description
`LINE`, `PLINE`, `RECTANG`, `POLYGON`	Basic geometry
`CIRCLE`, `ARC`, `ELLIPSE`, `SPLINE`	Curves
`HATCH`, `HATCHEDIT`	Hatch fills with pattern, scale, angle editing
`OFFSET`, `TRIM`, `EXTEND`, `FILLET`	Modify geometry (supports lines, arcs, ellipses, polylines, splines)
`BREAK`, `STRETCH`, `LENGTHEN`	Shape editing
`ARRAY`, `MIRROR`, `MOVE`, `COPY`, `ROTATE`, `SCALE`	Transformations
`EXPLODE`	Explode blocks, dimensions, polylines, mlines
`DDEDIT`	Double-click text editing
`MASSPROP`	Area, perimeter, centroid of selected entities

3D Modeling

Command	Description
`BOX`, `SPHERE`, `CYLINDER`	Solid primitives
`EXTRUDE`, `REVOLVE`	Profile-based solids
`LOFT`	Ruled-surface loft through cross-sections
`SWEEP`	Sweep a profile along a path
`ARRAY3D`	3D array
ACIS tessellation	Renders `3DSOLID`, `REGION`, and `BODY` entities

Annotations & Dimensions

Dimensions: Linear, Aligned, Angular, Radial, Diameter, Ordinate — with full DIMSTYLE support (DIMASZ, DIMSCALE, DIMEXO, DIMEXE, and more)
Text: MTEXT, TEXT, DTEXT with font browser (STYLE DIALOG)
Leaders: MLEADER with straight and spline path types; MLEADERSTYLE manager
Tolerances: GD&T feature control frames
Tables: TABLE entity render; TABLESTYLE manager
MLine: MLINE entity with MLSTYLE manager and EXPLODE support

Paper Space & Layouts

Multi-tab layout system with model space and unlimited paper space tabs
Viewport projection: Model content correctly projected into paper-space viewport rectangles
Camera persistence: View position and zoom saved per layout; restored on file open and tab switch
Correct paper size: Physical paper dimensions read from embedded PlotSettings (not drawing limits)
Inline MSPACE overlay — enter a viewport with double-click; edit model entities in place
VPORTS — preset viewport configurations (single, 2H, 2V, 4-way)
LAYOUTMANAGER / LAYOUTPANEL — GUI layout manager
PLOTSTYLEPANEL / STYLESMANAGER — plot style table editor (CTB/STB)
PRINT — send layout to system printer

Blocks & References

INSERT with attribute prompting (ATTREQ)
ATTEDIT — edit block attribute values interactively
REFEDIT / REFCLOSE — in-place block reference editing
XREF — attach, reload, and resolve external DWG/DXF references
DATAEXTRACTION — export entity property data to CSV

Snapping & Precision

Object snaps: Endpoint, Midpoint, Center, Node, Quadrant, Intersection, Perpendicular, Tangent, Nearest, Insertion, and more
Ellipse arc endpoints, LWPolyline arc midpoints, Hatch boundary points
Object Snap Tracking (OTRACK / F11)
Polar Tracking with configurable angle increment
Dynamic Input overlay (DYNMODE / F12)
Grid snap with adaptive spacing
Command history navigation (↑ / ↓)

Rendering

GPU-accelerated via WebGPU (wgpu)
4× MSAA anti-aliasing
Orthographic and perspective camera
ViewCube with face/edge/corner snapping
Wide polylines: LWPolyline and Polyline2D filled strokes
Raster images: GPU-textured quad pipeline (IMAGE command)
Wipeout: Solid fill masking
Complex linetypes: Text and shape elements rendered in linetype patterns
White/black entity colors adapt to background luminance
Per-viewport background color (BACKGROUND)
Visual style selector (Wireframe, Shaded, etc.)
X-ray ghost pass for selected wires occluded by geometry

UI

Modular ribbon interface — Home, Insert, Annotate, View, Manage, Layout
Command line with autocomplete and history
Layer Manager with per-viewport freeze columns
Properties panel
COLORSCHEME — runtime theme switching
SHORTCUTS — keyboard shortcuts panel
SPLINEDIT — close, open, reverse spline control points
UCS icon with 3D foreshortening and axis labels

Installation

Linux (AppImage)

Download H7CAD-*-linux-x86_64.AppImage from the latest release, then:

chmod +x H7CAD-*-linux-x86_64.AppImage
./H7CAD-*-linux-x86_64.AppImage

No installation required — runs directly on any modern Linux distribution.

Windows

Download H7CAD.exe from the latest release and run it directly.

Build from Source

Requirements: Rust 1.75+

git clone https://github.com/HakanSeven12/H7CAD.git
cd H7CAD
cargo build --release --bin H7CAD
./target/release/H7CAD

License

GPL-3.0-only — see LICENSE

README.md Unescape Escape

H7CAD

Features

File Formats

2D Drafting

3D Modeling

Annotations & Dimensions

Paper Space & Layouts

Blocks & References

Snapping & Precision

Rendering

UI

Installation

Linux (AppImage)

Windows

Build from Source

License

README.md