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feat(materials): pack-textures live preview, drop, presets (Phase 5 slice G2+G3) #479

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Merged
fernandotonon merged 1 commit into from
May 10, 2026
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feat(materials): pack-textures live preview, drop, presets (Phase 5 slice G2+G3) #479

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2 changes: 1 addition & 1 deletion CLAUDE.md
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Expand Up @@ -162,7 +162,7 @@ Three singletons manage core state. All run on the main thread. Access via `Clas

- **BatchExporter** (`src/BatchExporter.h/cpp`): Multi-file conversion wrapping CLIPipeline. Supports progress reporting.
- **MaterialPresetLibrary** (`src/MaterialPresetLibrary.h/cpp`): QML_SINGLETON providing one-click material presets (Plastic, Metal, Wood, Glass, Unlit, Wireframe).
- **TextureChannelPacker** (`src/TextureChannelPacker.h/cpp`, slice G): pure-data packer that takes 1-4 grayscale source images (or constants) and writes a single packed RGBA texture (PNG/TGA/JPG). Each output channel is sampled via Rec.601 luminance from its source image, with an optional invert flag (useful for roughness↔glossiness). Smaller sources are bilinear-scaled up to match the largest input. Surfaced via the `qtmesh pack-textures` CLI subcommand, the `pack_textures` MCP tool, and the "Pack Channels…" button in the Material Editor.
- **TextureChannelPacker** (`src/TextureChannelPacker.h/cpp`, slice G): pure-data packer that takes 1-4 grayscale source images (or constants) and writes a single packed RGBA texture (PNG/TGA/JPG). Each output channel is sampled via Rec.601 luminance from its source image, with an optional invert flag (useful for roughness↔glossiness). Smaller sources are bilinear-scaled up to match the largest input. Surfaced via the `qtmesh pack-textures` CLI subcommand, the `pack_textures` MCP tool, and the "Pack Texture Channels…" button in Material Mode → Mode Tools (slice G/G2/G3). The dialog (`qml/TextureChannelPackerDialog.qml`) is a top-level Inspector-styled `Window` with a 256×256 live preview thumbnail (slice G2 — `MaterialEditorQML::previewPackedTextureChannels` returns a `data:image/png;base64,…` URL the QML Image element shows directly), `DropArea` on each channel row for drag-and-drop from Finder/Explorer, three one-click presets (Unity ORM, Unreal MR, Spec→Gloss invert) that filename-heuristically wire existing source paths to the right channels, and per-row trash-can reset buttons (slice G3).

### MCP Server

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