Feature Roadmap

[stevk]

These are the attributes that should have tests created next. They are listed in order of priority.

• Materials and PBR

• Samplers

• Primitives_Attributes
  position
  normal
  tangent
  TexCoord_0
  TexCoord_1
  Color_0

• Spec gloss material

• Assets: Version checking
  Version/Min version
  Extensions required

• Mesh
  indices (on/off)
  indices mode
  Single primitive
  multiple primitives (Split into 2 triangles. PrimitiveAttributes: All on - all off)

• Color Space
  sRGB
  linear

• Nodes
  Node w/ child
  Node w/ children
  Node w/ deep node hierarchy
  Node with transformations (Combo?, Axis flip, negative scale, etc.)
  matrix (transformation)
  rotation
  scale
  translation

• Interleaved buffers
  Position, UV0, Vertex Color

• Node Animation

• Skin Animation

• Animation Sampler component types Need test models for different component types for animations #533

• Instancing What do we want to test instancing with #419

• Accessors - sparse

• Buffers
  Individual buffers for POSITION, INDEX, NORMAL, animation channels individual buffers for POSITION, INDEX, NORMAL, animation channels #440
  multiple buffers
  BufferViews byteStride (undefined, two or more accessors)
  BufferViews target (ArrayBuffer, ElementArrayBuffer)

• .Glb
  Data packed
  No data packed
  Some data packed

• Texture Source
  .jpeg
  url

• URI tests Add some tests for uris #451

• Material test w/ normals, vertex colors, base color factor + base color texture Additional Material sample needed which contains normals #438

• Alpha mask tested with different alpha factors (1, 0, 0.8)

• Alpha blend tested with different alpha factors (1, 0, 0.8)

• Max, min values of floats. Only ones with limited ranges?

• Test engine limits Create set of models to test engine limits #283

• Unsigned indices with values high enough that they have negative values if treated as signed Add models that will have negative values if treated as signed #316

• Points w/ normals, w/o indices. w/ texture cords Mesh_PrimitiveMode is missing some tests along Points and Lines #371

• Lines w/ normal Mesh_PrimitiveMode is missing some tests along Points and Lines #371

• Lines w/ normals, tangent, normal texture, and texture coords Mesh_PrimitiveMode is missing some tests along Points and Lines #371

• Alpha_blend, alpha_mask w/ double sided

• Morph Targets
  Support of at least eight morphed attributes
  Add instancing model

• Scenes
  Zero scenes
  One Scene
  Multiple Scenes
  One Scene w/ multiple nodes
  Multiple Scenes w/ multiple nodes
  Multiple Scenes w/ the same node
  Multiple Scenes/no scene attribute

• Material test using ORM texture There is no material test for ORM textures #405

• Non-power of 2 textures Add tests for non-power of 2 textures #318

• Node Parent-child hierarchy transform The parent-child transforms cause issues with the current node model #363

• MSFT LODs Tests needed for MSFT LODs #353

• KHR_materials_unlit (extension) Generate assets that utilize KHR_materials_unlit #446

• KHR_light_punctual (extension) Add tests for KHR_lights_punctual #452

• KHR_tex transform (extension) add tex trafo test #531

• Outside of range for attributes that have float values (Negative test)

• Model missing a top level feature. E.g. Missing material, or node, etc… Won't render anything. (Negative test)

• Test tangent space of normal map Create models that tests the tangent space of normal map #472

• Name field with special cases (null string, duplicated)

• Node with negative scale and double sided (should work if both features work separately, so low pri).

NON-FEATURE WORK

• Model, MeshPrimitive, and Modelgroup should have separate .cs files The model and MeshPrimitive classes shouldn't share a .cs file with the modelgroup class #510
• Add data for validating animations (Blocked. Need external requirements) Add Node Animation validation #456
• Create MD detailing the base model used Create MD detailing the base model used  #140
• Separate and display occlusion, roughness, and metallic textures in readme Separate and display occlusion, roughness and metallic textures in readme #198
• Mesh_Primitives has only a single model (add models or consolidate) Mesh_Primitives has only a single model #421
• Move glTF-Assets-Viewer to glTF-Asset-Generator Move glTF-Assets-Viewer to glTF-Asset-Generator #447
• Only display the skybox for models that have attributes that require a skybox Sample screenshots have a skybox for models that don't need one #519

[bghgary]

I think Mesh, Primitives, Primitive_Attributes should be first in this list. Scene, node, etc. can go later.

[stevk]

Made that update.

[andreasplesch]

Since there is a question mark for buffers, perhaps add individual buffers for POSITION, INDEX, NORMAL, animation channels etc. Some engines may expect that there is only one buffer, or one for geometry and one for animation.

[bghgary]

Sure, we can do that. Do you mind filing a separate issue so that it doesn't get lost?

[andreasplesch]

Please see #440.

[bghgary]

Thanks @andreasplesch!