BlendRadiant

This is a fork of c-d-a's io_export_qmap Blender Addon, with the aim of modifying it until it can export maps that are directly readable by (Gtk/Net)Radiant. Another aim is to add tools that facilitate the creation of entire maps (including lights, models, entities, ... and not just brushes) in Blender, basically allowing users to do everything they could otherwise do in (Gtk/Net)Radiant - hence the name BlendRadiant.

Status

Right now, only the UI has been worked on, while the actual export functionality has only had features removed compared to io_export_qmap. I only put this on GitHub to have an issue tracker.

Required features until "minimal viability"

• Export meshes as "rooms" ("Make Room" in (Gtk/Net)Radiant)
• Export entity key-value pairs
  • Read entity definitions from Radiant gamepack files
  • UI for setting entity classname and attributes
  • Actual export
• Export lights
  • Export as ordinary entities (no special case for lights)
  • Special UI that is more limited version of entity UI (?)
• Either output directly as Brush Primitive map (Radiant format) or use q3map2 to convert after export
• Fix texture issues
• Massive cleanup

Features that would be nice to have

• Global scale factor
• Export as models
• Read shader definitions (existing addons?)
  • Alternatively: export rudimentary shader based on Blender material as placeholder
• Approximate lights from Blender's native light properties
• Scale mesh with point entity class so bounding box matches spec

Below is io_export_qmap's original README:

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Exports either individual faces as pyramids, or objects as convex brushes. Uses material names for texture assignment and material image size for scaling. Supports UVs both in standard Quake and in Valve220 format (adapted from EricW's implementation for OBJ2MAP). Offers custom grid. Allows saving to clipboard.

The exporter ensures that the brushes are convex and the faces planar. You don't have to triangulate the meshes in advance, but in some cases it can help with UVs (e.g. with mid-edge vertices). There's room for improvement, but it should work fine as is.

Standard format UV export is lossy (no shearing). I don't really expect anyone to be using it over Valve220 anyway, but it should produce decent results for id1-style detailing. Single-axis curves should be fine, no miracles though.

Only tested in Trenchbroom for now. Might need to change precision for other editors. Let me know if it works/breaks elsewhere.