ivokabel / dx11renderer Goto Github PK

• CGSE: My question
• Filament: Energy Conservation
  • ...

• ...
• CGSE: Pre-filtered environment map...
• ...

Study materials:

• RasterTek Tutorial 40: Shadow Mapping
• DX11 Sample Browser: CascadedShadowMaps11 Sample?
• Twitter?
• …

TODO:

• Directional lights
  • testing scenes
  • single light
    • Render scene to extra buffer before final rendering
    • ...
    • Create shader (temporarily within scene)
    • Use the new depth map shader instead regular ones
    • Integrate depth map shader to a better place? Into lights? Or just store the shader next to regular ones and use it when asked for?
    • ...
  • multiple lights
  • ...
• Point lights
  • single light
  • multiple lights
  • ...

Study Materials

• YT crash course
• glTF
  • glTF tutorials/An Advanced Material
  • glTF 2.0 specification:
    • geometry: tangent, bitangent
    • additional maps
    • material
    • normalTextureInfo
  • glTF 2.0 sample models

To Do

• Load texture
  • Texture
  • Scale
    • Upgrade tinygltf to 2.5.0
    • Access material properties directly
    • If needed, update material/texture architecture
    • Add scale
      • Load within NormalTexture
      • Use scale
• Load tangent vector
  • Load data
  • Require tangent data for normal maps
  • Generate missing data:
    • MikkTSpace
    • mikktspace-for-houdini
    • Fix warnings
  • CalculateTangentsIfNeeded #52
• Compute modified normal
• Testing scenes
  • Get
  • Generated tangent test problem: May be caused by different handedness somewhere. Try to fix alongside the handedness switch: #49

Extras

• Use modified microfacet normals #46

how do i make this "in progress"?

Related to #10

• Workflow switch & metallness shader stub
• Add metal/roughness texture
  • Texture
  • Compound const factors: LoadFactor() + LoadTexture()
• Implement brdf: PBR metalness, Advanced mat
  • Approximate using specular blinn-phong
  • Draft implementation
  • Presentation
  • Debugging shader
  • Polish implementation: high specularity, numericals, bloom, etc.
    • Fireflies and dark edges
    • Black squares when bloom is on
    • Test scenes: MetalRoughSpheres, MetalRoughSpheresNoTextures
    • Appendix B: BRDF Implementation
    • Khronos Sample Viewer
    • Presentation
  • Ambient integral approximation;
    • Basic implementation
  • Better layering (after linear workflow #14)
    • How to combine diffuse and specular
    • Smooth Refraction Approximation Layered Model
    • Filamet: Clear Coat Model
    • Implementation
      • Testing scene
      • Smooth refraction approximation
      • Ambient approximation
      • Rough refraction approximation
      • Optimization: precomputation, …
      • Presentation
        • Add some nice new scene
        • Increase light/exposure of scenes
        • Create comparisons
          • Better view presets?
        • Twitter
        • Update readme.md
  • Energy conservation (#39)
• Multiply const factors within shader (do not pre-multiply)
  • Base colour
    • Testing scene: three spheres – texture/factor/texture*factor
    • Remove pre-multiplication
    • Pass constant to shader
    • Add multiplication in shader
  • Metal&rough

Extras in #45

...D3DX_IsNan

knaskd kals

• Separate geometry from scene + refactoring
• Generate sphere
• Enjoy :-)

• material.occlusionTexture
• occlusionTextureInfo
• SceneOcclusionTexture
• Pass values to shaders
• Use in shaders
• Shared textures? TexturePool? #55
• GTAO #56

• GTAO?

Notes:

• Overview
• Filmic tone mapping curve
• or better ACES?
  • Start with Krzysztof Narkowicz blog
    • ...more complex fit from Stephen Hill

TODO:

• Theory
• Ask twitter for help
• Implementation #1: Simple
• Implementation #2: Stephen Hill
• Testing scene: coloured lights over surface
• Twitter
• Readme
• Screenshots

• Bananaft

Extras to #11

• Darken rough dielectric?
• Ambient approx.: Respect geometric darkening?
• Energy conservation (#39)

Debugging: D3DX_IsNan

• Analysis: PS or CS?
• Add 2nd pass
  • Optional (on key press)
  • Low-level prototype:
    • Texture/RTV/SRV
    • Samplers, ...
    • Shader infrastructure
    • DrawFullScreenQuad
    • Shader op: no change & simple test operation
  • Higher-level wrapper: PassBuffer
• Implement image processing
  • Bloom
    • Downscale
    • Horizontal blur
    • Vertical blur
    • Composition: orig + blurred
  • Tone mapping?
  • FXAA?
• MSAA support
• Optional: Downscale flickering problem

• diffuse
• specular
  • Default zero texture (when specularity texture is not available)
  • Specular texture
  • Refactoring
  • Screenshot
• reflectance?
• glossiness/roughness

Related to #40

...

Test issue

Related to #11

• Gamma removal
  • glTF textures
    • Metalnes material: glossy coating in non-metal is too bright? just for ambient light??
  • Direct textures
  • Pre-multiply textures by const color factors (only if not handled directly within the shader)
  • Per-vertex values?
• Gamma restoration
  • RTV auto conversion?
  • Final shader step?

Resources:

• Wikipedia: Gamma correction
• DXGI
  • Using gamma correction (reading)
  • Converting data for the color space
  • DXGI_FORMAT
• D3D10: Data Conversion Rules
• Stack exchange:
  • Vectorizing sRGB to linear conversion
  • Gamma-Correct rendering without floating-point rendertargets
• Molecular Musings: Gamma-correct rendering
• Nvidia: GPU Gems 3: Chapter 24. The Importance of Being Linear
• Understanding Gamma Correction
• What every coder should know about gamma

Testing:

• Simple shading: sphere, simple material, simple lighting
• Constants
  • Vertex color blending
  • Rough/metal spheres under pure ambient light (various intensities: 0.25, 0.50, 0.75?, 1.00)
  • Vertex metalness parameters blending
• Loaded from Textures
  • Quad with gradient (linear in sRGB) under pure ambient light (various intensities: 0.25, 0.50, 0.75?, 1.00)
  • Sphere with pure diffuse texture with horizontal black-white waves, just directional light
  • ...
• glTF data
  • Rough/metal spheres with various light types
• Per-vertex colors blending

Body...

• Switch handedness
• Check generated tangent test problem -- may be caused by different handedness somewhere.

Related to #48

GTAO paper

• Directional lights → point lights
• Requires computing light vector in PS
• Nice "fireflies" animation

FPS

Good for static view at least (photo mode).

• Theory...
• Multi-frame accumulation

Re-projection? Maybe later. Requires proper inter-frame transformations!

Related to #48

Sharing same texture among:

• multiple material parameters (e.g. metal/roughness + occlusion)
• multiple materials

• Just a quick experiment!
• Textured
• Energy-conserving workflow

LoadHardwiredScene() wrapper

• Simple wrap
• Dynamic scene objects data allocation
• Parametrized per-scene lights
• Different scenes: planets, debug sphere, earth
• Dynamic lights count (max light count, e.g. 16; for testing materials)

File loader

• File loader analysis: tiny gltf
• Build a simple example
• Process the data
  • First data touch (descend)
  • Mesh geometry
    • Buffers, buffer views, accessors, and shit...
    • Positions
    • Indices
    • Wrap data acquisition
    • Load into SceneObject
      • Rename SceneObject to ScenePrimitive
      • Directly to ScenePrimitives
        • positions
        • indices
        • topology
        • normals
        • tex coords 0
    • Non-indexed geometry?
    • Implicit normals if not available?
  • Hierarchy
    • SceneNode with primitives
    • Transformations
      • Individual
      • Matrix
    • Children
      • Load
      • Animate
      • Render
    • Switch handedness: #49
    • Optimization: shared ScenePrimitives?
    • Optimization: shared SceneNodes?
  • Materials
    • Separate from scene primitives
    • Constant diffuse
    • Texture
      • Image
      • Multiply with const factors
      • Convert sRGB->linear->sRGB
      • Sampler
      • texCoord
    • PBR metalness #11
    • PBR specularity #28
  • Bugs
    • Degenerated geometry: 32b indices, matrix trafos
    • Missing geometry
• Various
  • Rotate the whole scene instead of root objects
  • Allow transformations of loaded scenes
• Separate to a file/class?
• Licence
• Command line args #51

• emissiveTexture
• emissiveFactor
• emissiveTexture
• emissiveFactor
• Pass values to shaders
• Use in shaders

Related to #40

• Only if needed due to content?
• Use: diffuse, glossiness, specular, emission, ...
• Maybe: normal/bump map,...
• Ignore: AO, gradient...

• Analyse usage (on the fly)
• Wrap:
  • Geometry (vertices, indices, topology)
  • Animation
  • Geometry drawing
  • Point light proxies
  • Per-object CB
  • Texture
  • Test multiple instances

• Command line processing
  • Retrieving command line parameters from WinMain in win32
  • SO: Breaking down WinMain's cmdLine in old style main()'s arguments
• Scene argument
• …

• Allow any possible combination of passes (in fixed order).
• Move tone mapping to its own pass.