[TODO] Support Composition Arcs - Githubissues

lighttransport / tinyusdz

Tiny, dependency-free USDZ/USDA/USDC library written in C++14

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[TODO] Support Composition Arcs #25

Open syoyo opened 2 years ago

syoyo commented 2 years ago

Status

Basic composition features are implemented(except for specializes)

Need verification to check if composition is working well or not

Composition

[x] subLayers
[x] references
[x] inherits
[x] payloads(delayed load)
[x] variants/variantSets
[ ] specializers(not so much used? priority is low)

Status

[x] Preliminary support of parsing composition syntax in Ascii parser
[x] Preliminary support of parsing composition info in Crate parser
[x] Support variantSet stmt in Ascii parser.
[x] Support SpecTypeVariant in Crate parser.
[x] Load scene data as PrimSpec and Layer
[x] Sematic reconstruction(composition) of Prims with Composition features
[ ] Do test if composition is working expected
- Verify Composition Strength ordering

Crate(USDC) parser support

[x] Parse Payload and PayloadListOp
[x] Parse Referene and ReferenceListOp
[x] Parse VariantSelectionMap (map<string, string>)
[x] Variant SdfSpecType
[x] SpecTypeAttribute under Variant?

Limitation

Layer offsetting is not yet supported.

subLayers

[ ] LayerOffset(subLayerOffset) is not yet supported(ASCII)

Reference

[ ] LayerOffset is not yet supported(ASCII)
[ ] customData is not yet supported(ASCII)

Payload

[ ] LayerOffset is not yet supported(ASCII)

syoyo commented 1 year ago

Kitchen set

As of https://github.com/syoyo/tinyusdz/commit/187b50535cea69a20b47019ac45aa0a5cb60255b

[x] Parse OK. Kitchen_set_instanced.usd also OK to parse.
[x] Reference, Payload
[x] variants, inherits, over, ...
[ ] Validate composition behavior is identical to pxrUSD

syoyo commented 1 year ago

UsdSkel example

https://openusd.org/release/dl_usdskel_examples.html

[x] Parse OK(in tusdcat --flatten
[ ] Validate composition