Let’s architect a modular 3D game engine that showcases the top 20 DirectX 12 and AMD ROCm API calls, with clean separation between rendering, compute, and engine logic. This will give you a high-performance, extensible foundation for integrating neural workflows, asset pipelines, and cognition routing later.

🗂 Folder Structure

NeuroEngine/
├── Assets/                  # Placeholder for textures, models, shaders
├── Engine/
│   ├── Core/                # Initialization, windowing, input
│   ├── Graphics/            # DirectX 12 rendering pipeline
│   ├── Compute/             # ROCm HIP compute modules
│   └── Utils/               # Logging, profiling, memory
├── Shaders/
│   ├── HLSL/                # DX12 shaders
│   └── HIP/                 # ROCm kernels
├── ThirdParty/              # DX12/ROCm headers, helper libs
├── App/
│   └── Main.cpp             # Entry point
├── CMakeLists.txt           # Build configuration
└── README.md

🔧 Top DirectX 12 API Calls Used

⚙️ Top AMD ROCm HIP API Calls Used

🧠 Sample Code Snippets

📁 Engine/Core/Init.cpp

// DXGI Factory and Device
ComPtr<IDXGIFactory4> dxgiFactory;
CreateDXGIFactory1(IID_PPV_ARGS(&dxgiFactory));

ComPtr<IDXGIAdapter1> adapter;
dxgiFactory->EnumAdapters1(0, &adapter);

ComPtr<ID3D12Device> device;
D3D12CreateDevice(adapter.Get(), D3D_FEATURE_LEVEL_12_1, IID_PPV_ARGS(&device));

📁 Engine/Graphics/Renderer.cpp

// Command Queue
D3D12_COMMAND_QUEUE_DESC queueDesc = {};
device->CreateCommandQueue(&queueDesc, IID_PPV_ARGS(&commandQueue));

// Swap Chain
DXGI_SWAP_CHAIN_DESC swapChainDesc = {};
dxgiFactory->CreateSwapChain(commandQueue.Get(), &swapChainDesc, &swapChain);

// Render Target View
device->CreateRenderTargetView(renderTarget.Get(), nullptr, rtvHeap->GetCPUDescriptorHandleForHeapStart());

📁 Engine/Compute/HIPInterop.cpp

#include <hip/hip_runtime.h>

__global__ void ComputeLighting(float3* positions, float3* normals, float3* output) {
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    output[idx] = positions[idx] + normals[idx]; // Simplified lighting
}

extern "C" void LaunchLightingKernel(float3* d_positions, float3* d_normals, float3* d_output, int count) {
    int threads = 256;
    int blocks = (count + threads - 1) / threads;
    hipLaunchKernelGGL(ComputeLighting, dim3(blocks), dim3(threads), 0, 0, d_positions, d_normals, d_output);
    hipDeviceSynchronize();
}

📁 App/Main.cpp

#include "Engine/Core/Init.h"
#include "Engine/Graphics/Renderer.h"
#include "Engine/Compute/HIPInterop.h"

int main() {
    InitEngine();         // DX12 + Window
    InitHIP();            // ROCm device setup
    while (IsRunning()) {
        UpdateScene();    // Game logic
        RunCompute();     // HIP lighting
        RenderFrame();    // DX12 draw call
    }
    Shutdown();
    return 0;
}

🧱 Modular Extensibility

• Assets: Plug in FBX/GLTF models, DDS textures, and HLSL shaders.
• Compute: Expand HIP kernels for physics, AI, or cognition workflows.
• Graphics: Add shadow mapping, deferred rendering, or ray tracing.
• Engine: Integrate ECS, input systems, and audio pipelines.