v0.3.0 - RenderGraphs and Animations

Released 2022-02-11

This is by far the largest release of rend3 since 0.1. I have done my best to document everything that has changed.

Major Changes

• rend3-pbr got renamed to rend3-routine and will host all render routines, not just PBR related ones.

Added

• rend3-egui: An integration with the immediate mode GUI egui @MindSwipe
• rend3-textured-quad: Add example of simple 2D rendering.
• rend3: Allow duplicating objects overriding some of their properties. @setzer22
• rend3: Implement mesh skinning. @setzer22
• rend3: Added CameraProjection::Raw.
• rend3: The renderer now has a handedness value that determines the handedness of its coordinate system.
  This allows the renderer to deal with both DX-convention coordinate systems and OpenGL convention coordinate systems.
• rend3-gltf: Load gltf animation data @setzer22

Changes

• rend3: Instead of passing a render routine to the render function,
  you now add them to a rendergraph, then pass that rendergraph into the renderer.
  • rend3-routine:
    • The old PbrRoutine has been replaced with the more vercitile BaseRenderGraph.
    • This base rendergraph will put all the parts together through it's add_to_graph function.
    • Split the PbrRoutine into two parts add_prepass_to_graph and add_forward_to_graph.
    • Split out the skybox renderer into SkyboxRoutine.
    • Split out tonemapping into the TonemappingRoutine.
• rend3: Renamed the old RendererMode to RendererProfile and adjusted verbiage to refer to them as profiles.
  • "CpuPowered" => "CpuDriven".
  • "GpuPowered" => "GpuDriven".
• rend3: All meshes now require validation.
  • MeshBuilder::new() now takes a handedness of the mesh. If it doesn't match the handedness of the renderer, it flips the winding order.
  • MeshBuilder::build() now returns a Result<Mesh, MeshValidationError>. This validation can be unsafely omitted.
  • The implementation functions Mesh::calculate_normals{,_for_buffers} and Mesh::calculate_tangents{,_for_buffers} are now unsafe.
• rend3: Renamed CameraProjection::Projection to CameraProjection::Perspective.
• rend3: Allow requesting device features explicitly in rend3::create_iad. @setzer22
• rend3: Objects now take a mesk_kind allowind definition of static or animated meshes. @setzer22
• rend3-routine: All transparency now has backface culling enabled. Use Mesh::double_side or MeshBuilder::with_double_side to re-enable double sided transparency.
• rend3-gltf: Split return value of load_gltf into per-scene data and per-instance data. @setzer22
• rend3-gltf: The nodes vector is now flat instead of nested. Hierarchy is represented using indices. @setzer22

Fixes

• rend3: Fixed objects becoming invalid after a vertex buffer resize occured.
• rend3: Get vertex/index counts from RangeAllocator. @jamen
• rend3: Fix compatibility comparison for RenderPassTargets. @setzer22