tinyusdz/doc/prim_format.md

Mesh prim

• points : usually vec3f[]
• normals : usually vec3f[] varying
• primvars:st : usually vec2f[] varying
• primvars:st:indices : usually int[] varying
• velocities : usually vec3f[]
• texcoord: usually texCoord2f[] (Texcoord bound to Mesh prim)

Mesh property

• doubleSided : bool

• extent : floa3[2]

• facevaryingLinearInterpolation : cornerPlus1

• faceVertexCounts : int[]

• faceVertexIndices : int[]

• orientation : ty: token. uniform. allowedTokens: ['rightHanded', 'leftHanded']

• visibility : ty: token. varying. allowedTokens: ['inherited', 'invisible']

• purpose : ty: token. uniform. allowedTokens: ['default', 'render', 'proxy', 'guide']

• subdivisionScheme : ty: token. uniform. allowedTokens: ['catmullClark', 'loop', 'bilinear', 'none']

• trianglesSubdivisionRule : ty: token. uniform. allowedTokens: ['catmullClark', 'smooth']

• xformOpOrder : ty: token. uniform.

• material:binding : Path

• proxyPrim : ty: relation. uniform

Optional property

• primvars:displayColor : ty: float3[], varying
  • Usually array len = 1(constant color over the mesh)
• primvars:displayOpacity : ty: float[], varying
  • Usually array len = 1(constant opacity over the mesh)

SubD property

• cornerIndices : int[]
• cornerSharpnesses : float[]
• creaseIndices : int[]
• creaseLengths : int[]
• creaseSharpnesses : float[]
• holeIndices : int[]
• interpolateBoundary : token?

Xform

• world bounding box : range3d
• local world xform : matrix4d
• purpose
• visibility
• xformOpOrder

Shader

• inputs:id : UsdUVTexture
• inputs:fallback : fallback color(Usually vec4f)
• inputs:file : @filename@

Texcoord reader

UsdPrimvarReader_float2

• inputs:varname(token) : Name of UV coordinate primvar in Mesh primitive.
• outputs:(float2) : Output connection name. Usually outputs:result

TODO

• non-vec3f position
• vertex color
• xformOpOrder
• Multi texcoord UVs