TextureStitcher
Stitches multiple textures from an FMM-style multi-bone model (or a single generic Java item model) into a single atlas PNG. Bedrock geometry only supports one texture per geometry, so multi-texture models must be combined.
Two entry points are provided:
- stitch — the legacy FMM path: accepts a list of bone JSON files on disk, each representing one bone of an FMM multi-bone model.
- stitchSingleModel — the generic path: accepts an already-parsed Java item model JSON in memory, treated as a single "bone". Used by the generic Java→Bedrock pipeline (Phase 6) which has the merged-parent JSON in hand and does not want to round-trip through disk.
Both paths share the texture-collection / atlas-building code. The FMM path also emits per-bone item icons for callers that consume them; the generic path renders its own compact inventory icon and skips those source texture copies.
Functions
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public static TextureStitcher.StitchResult stitch(String modelName, List<File> boneJsonFiles, File mergedPackRoot, File bedrockPackDir)
Collects all unique textures referenced by bones in a model, stitches them into one atlas, writes it to the Bedrock pack, and returns sprite mapping info.
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public static TextureStitcher.StitchResult stitchSingleModel(String modelName, String boneName, JsonObject javaModel, File mergedPackRoot, File bedrockPackDir)
Generic-pipeline entry point: stitch a single in-memory Java item model into a Bedrock atlas.
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Writes the source PNG to
dest.