DX12 Renderer

Demos

Deferred

• DeferredLightingDemo
  • Deferred rendering pipeline:
    • Directional, Point, Spot, and Capsule lights;
    • Light passes are implemented using the stencil buffer;
  • PBR:
    • Cook-Torrance BRDF model;
    • Image-Based Lighting:
      • Diffuse (Irradiance Map) and Specular (Pre-Filtered Environment Map);
      • Both maps are computed on application start based on an HDR skybox cubemap;
  • HDR pipeline:
    • Render targets supporting HDR (R16G16B16A16_FLOAT);
    • Auto exposure via a Luminance Histogram implemented in Compute shaders;
    • Tone mapping;
  • TAA;
  • SSAO;
  • SSLR.

SSAO Off	SSAO On

SSLR Off	SSLR On

Controls

• Use WASD/Arrow Keys to move the camera;
• Hold LMB and move the mouse to orient the camera;
• Press L to toggle light animation;
• Press T to toggle TAA;
• Press O to toggle SSAO;
• Press P to toggle SSLR.
• Press B to toggle Bloom.

Forward

• LightingDemo
  • Models loaded from OBJ files;
  • .DDS textures loading:
    • Textures for this demo are stored in BC7_UNORM.
  • Mipmapping;
  • Phong lighting with a directional light and several point and spot lights;
    • Using diffuse, normal, gloss, and specular maps;
  • Particle system with CPU simulation (10000+ particles on screen) and instanced rendering;
  • Shadow mapping for the directional, point, and spot lights;
  • MSAA:
    • Built-in resolve for color;
    • Custom compute pass for the depth attachment (min among all samples);
  • Soft shadows using 16x Poisson Sampling and Early Bail;
  • Dynamic environment reflections - see the sphere;
  • Post-processing:
    • Screen-space fog;
    • Bloom.

Controls

• Use WASD/Arrow Keys to move the camera;
• Hold LMB and move the mouse to orient the camera;
• Press L to toggle light animation.

ToonDemo

• ToonDemo
  • Toon/Cel-Shading:
    • Diffuse ramp texture;
    • Configurable specular;
    • Cross-hatching pattern;
  • Variance Shadow Mapping (Directional Light);
  • Post-processing:
    • Outline (Sobel-filter);
    • FXAA;
    • Bloom.

Controls

• Use WASD/Arrow Keys to move the camera;
• Hold LMB and move the mouse to orient the camera;
• Press L to toggle light animation.

MeshletsDemo

• MeshletsDemo
  • Meshlets are built via meshoptimizer.
  • GPU Meshlet Culling:
    • Cone backface culling;
    • Frustum culling (bounding spheres);
    • HDB (Hi-Z) occlusion culling (bounding spheres or AABBs):
      • Additional low poly geometry is treated as occluders (red transparent in the screenshot);
  • Culled meshlets are rendered via ExecuteIndirect;
  • Uses Render Graph.

Controls

• Use WASD/Arrow Keys to move the camera;
• Hold LMB and move the mouse to orient the camera;
• Press C to "freeze" the camera for cone and frustum culling;
• Press M and N to scroll the debugged meshlets forwards and backwards respectively.

RenderGraph

• RenderGraph
  • A simple implementation of a render graph:
    • Passes are defined via lambdas;
    • Resources are marked as either inputs or outputs;
    • GPU memory is aliased between different buffers and render targets when their lifetimes do not overlap;
    • Special "Token" resources are used for more controlled render pass ordering.

GrassDemo

• GrassDemo
  • ~45k individual grass blades sent to rendering after culling, 4kk total.
  • Grass animation in the vertex shader;
  • Per-chunk frustum culling (CPU);
    • Chunks consist of 500x500 instances;
  • Per-instance frustum culling (GPU, compute);
  • Grass instances rendered via ExecuteIndirect;
  • TAA.

Controls

• Use WASD/Arrow Keys to move the camera;
• Hold LMB and move the mouse to orient the camera;
• Press T to toggle TAA.
• Press C to toggle GPU culling.

Animations

• AnimationsDemo
  • Model and animations loaded from FBX files;
  • Skinning in the vertex shader;
  • Animation state blending;
  • Animation state merging (i.e., avatar masks).

Controls

• Use WASD/Arrow Keys to move the camera;
• Hold LMB and move the mouse to orient the camera.

Requirements

Packages (installed via vcpkg):

• assimp
• DirectXTex
• DirectXMesh
• meshoptimizer

Sources

• https://www.3dgep.com/learning-directx-12-1/
• https://www.3dgep.com/learning-directx-12-2/
• https://www.3dgep.com/learning-directx-12-3/
• https://www.3dgep.com/learning-directx-12-4/
• https://wiki.ogre3d.org/tiki-index.php?page=-Point+Light+Attenuation
• https://github.com/d3dcoder/d3d12book
• http://www.opengl-tutorial.org/ru/intermediate-tutorials/tutorial-16-shadow-mapping/
• https://learnopengl.com/Advanced-Lighting/Shadows/Point-Shadows
• https://catlikecoding.com/unity/tutorials/advanced-rendering/bloom/
• https://learnopengl.com/Advanced-Lighting/HDR
• https://www.alextardif.com/HistogramLuminance.html
• https://bruop.github.io/exposure/
• https://bruop.github.io/tonemapping/
• https://learnopengl.com/Advanced-Lighting/SSAO
• https://sugulee.wordpress.com/2021/06/21/temporal-anti-aliasingtaa-tutorial/
• https://logins.github.io/graphics/2021/05/31/RenderGraphs.html
• https://blog.traverseresearch.nl/render-graph-101-f42646255636
• https://themaister.net/blog/2017/08/15/render-graphs-and-vulkan-a-deep-dive/
• https://github.com/zeux/niagara
• https://arm-software.github.io/opengl-es-sdk-for-android/occlusion_culling.html

Libraries and Tools

• https://github.com/microsoft/DirectXTex
• https://github.com/microsoft/DirectXMesh
• https://github.com/assimp/assimp
• https://github.com/Microsoft/DirectXTex/wiki/Texconv
• https://matheowis.github.io/HDRI-to-CubeMap/
• https://github.com/zeux/meshoptimizer

Assets

• https://casual-effects.com/data/
  • Teapot, Cube, Lat-Long Sphere
• https://ambientcg.com/view?id=PavingStones070
• https://ambientcg.com/view?id=Moss002
• https://ambientcg.com/view?id=Metal036
• https://www.mixamo.com/
• https://sketchfab.com/3d-models/old-wooden-chest-45f93c78e5174036801bfb535c139ac7
• https://d1ver.artstation.com/projects/3k2
• https://ambientcg.com/view?id=Ground047
• https://www.cgtrader.com/free-3d-models/electronics/video/retro-television-set-c4dbe4af-960e-4a5c-ac25-2265d6a97cf6