Problems Importing DXF Files from QGIS with AutoCAD DXF Addon – Edges Are Distorted and Incorrectly Merged #2

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Paul-Pink · 2024-11-18T16:34:15+01:00

Paul-Pink commented

2024-11-18 16:34:15 +01:00

Summary:

When importing a DXF file exported from QGIS into Blender using the AutoCAD DXF Import Addon, issues occur with the geometry: edges are distorted, irregularly merged, or appear crooked, making the geometry unusable. The same DXF file displays correctly in other programs (e.g., Softtech Spirit).
Steps to Reproduce:

Export a DXF file from QGIS. (The data originates from a WFS server and includes polygons, such as buildings and parcels.)
Open the DXF file in a CAD program like Softtech Spirit or other CAD software. The polygons appear correct, as they do in QGIS or in the online cadastral map.
Import the same DXF file into Blender using the AutoCAD DXF Import Addon.
Observe the imported edges and polygons in Blender. The geometry is incorrect:
- Edges are distorted.
- Edges are incorrectly merged.
- Overall geometry appears warped.

Expected Behavior:

The polygons should be imported and displayed in Blender exactly as they appear in QGIS or CAD programs, without distortions or incorrect connections.
Actual Behavior:

The polygon geometry is deformed upon import into Blender, suggesting issues with DXF parsing or how the geometry data is handled.
Additional Information:

QGIS Version: 3.40.0
Blender Version: 4.2.3 LTS
AutoCAD DXF Addon Version: 0.9.10
Tested Software: Softtech Spirit, DWG TrueView 2025
File Format: DXF, polygons sourced from a WFS server.

**Summary:** When importing a DXF file exported from QGIS into Blender using the AutoCAD DXF Import Addon, issues occur with the geometry: edges are distorted, irregularly merged, or appear crooked, making the geometry unusable. The same DXF file displays correctly in other programs (e.g., Softtech Spirit). Steps to Reproduce: - Export a DXF file from QGIS. (The data originates from a WFS server and includes polygons, such as buildings and parcels.) - Open the DXF file in a CAD program like Softtech Spirit or other CAD software. The polygons appear correct, as they do in QGIS or in the online cadastral map. - Import the same DXF file into Blender using the AutoCAD DXF Import Addon. - Observe the imported edges and polygons in Blender. The geometry is incorrect: - Edges are distorted. - Edges are incorrectly merged. - Overall geometry appears warped. **Expected Behavior:** The polygons should be imported and displayed in Blender exactly as they appear in QGIS or CAD programs, without distortions or incorrect connections. Actual Behavior: The polygon geometry is deformed upon import into Blender, suggesting issues with DXF parsing or how the geometry data is handled. Additional Information: - QGIS Version: 3.40.0 - Blender Version: 4.2.3 LTS - AutoCAD DXF Addon Version: 0.9.10 - Tested Software: Softtech Spirit, DWG TrueView 2025 - File Format: DXF, polygons sourced from a WFS server.

DXF Import Issue_Import Options.png

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DXF Import Issue_Blender.png

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DXF Import Issue_Softtech Spirit CAD.png

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