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[Task] Tydra RenderData #31

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8 of 15 tasks
syoyo opened this issue Oct 5, 2022 · 1 comment
Closed
8 of 15 tasks

[Task] Tydra RenderData #31

syoyo opened this issue Oct 5, 2022 · 1 comment

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@syoyo
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syoyo commented Oct 5, 2022 •
edited

Goal

Convert USD data(usdGeom/usdShade/usdSkel) to Renderer(e.g. OpenGL/Vulkan, ray tracer) friendly data struct.
Currently focusing on rasterizer(meshes are all triangulated, vertex attributes can be drawn with single index buffer) and can display static mesh with texturing and PBR shading.

Status for v0.8.0 release

  • Extract vertex indices and vertex points
  • Compute node transform

    tinyusdz/src/tydra/scene-access.hh

    Line 264 in 453b4a3

    /// For efficient Xform retrieval from Stage.
  • Extract and setup UV coordinate
  • Triangulate mesh
    • Triangulate points, normals
    • Triangulate uvs(primvars)
    • Triangulate other primvars
  • Extract and setup Material/Shader
    • Evaluate Attribute value(Follow targetPath if the attribute is a Connection) to resolve shader graph connection
  • Extract and setup Texture image data
  • Partial TimeSample support

TODO, Furture work

  • Skinning support
  • Support TimeSample attributes of various Prims
  • Ray tracer friendly data structure
  • More is T.B.W.
@syoyo
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syoyo commented Apr 29, 2024

Aggregated to #148

@syoyo syoyo closed this as completed Apr 29, 2024
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@syoyo