SilkWebGpuPbr

Run the sample

dotnet run --(insert path here)/SilkWebGpuPbr.csproj 

This opens a Silk.NET window and renders a rotating PBR-lit cube with WebGPU. A small Silk.NET WebGPU renderer core for physically based shading and hardware instancing.

What is included

• PbrInstancedRenderer: creates the WebGPU bind group layout, pipeline layout, WGSL shader module, render pipeline, scene/material buffers, and instance buffer.
• GpuMesh: uploads indexed mesh vertex/index buffers.
• PrimitiveMeshes.CreateCube: returns a 24-vertex, 36-index cube with normals, tangents, and UVs.
• CubeScene: ready-to-draw one-cube scene wrapper for an existing WebGPU render pass.
• PbrVertex: position, normal, tangent, and UV vertex layout.
• MeshInstance: per-instance model matrix, normal matrix, and material index.
• PbrMaterial: base color, emissive, metallic, roughness, normal scale, and occlusion fields.
• GpuSceneData: view-projection, camera position, directional light, and ambient light uniforms.

Draw a cube

Create the cube scene after you have a Silk.NET WebGPU Device*, Queue*, swapchain/surface color format, and depth format:

var cubeScene = new CubeScene(webGpu, device, queue, colorFormat, depthFormat, cubeSize: 1.0f);

Inside an active RenderPassEncoder*:

cubeScene.SetCubeTransform(Matrix4x4.CreateRotationY((float)time));
cubeScene.Draw(
    renderPass,
    viewProjection,
    cameraPosition,
    lightDirection: Vector3.Normalize(new Vector3(-0.4f, -1.0f, -0.2f)));

Dispose it with the rest of your GPU resources:

cubeScene.Dispose();

Lower-level use

If you want to manage the mesh yourself:

MeshData cube = PrimitiveMeshes.CreateCube();
using var gpuCube = new GpuMesh(webGpu, device, queue, "Cube", cube.Vertices, cube.Indices);

renderer.UpdateMaterials(materials);
renderer.UpdateInstances(instances);
renderer.Draw(renderPass, gpuCube);

The pipeline expects TextureFormat values from your configured WebGPU surface and depth texture. It does not own the device, queue, surface, command encoder, render pass, or frame lifecycle.

License

This project is licensed under the MIT License - see the LICENSE file for details. Free for both personal and commercial use.