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D3D12 Raytracing MiniEngine Sample

MiniEngine Screenshot

Raytracing Modifications

This is a modified version of MiniEngine that uses the DirectX Raytracing for a series of effects.

The keys '1'...'7' can also be used to cycle through different modes (or using Backspace to open up the MiniEngine and going to Application/Raytracing/RaytraceMode):

  • Off - [1] Full rasterization.
  • Bary Rays - [2] Primary rays that return the barycentric of the intersected triangle.
  • Refl Bary - [3] Secondary reflection rays that return the barycentric of the intersected triangle.
  • Shadow Rays - [4] Secondary shadow rays are fired and return black/white depending on if a hit is found.
  • Diffuse&ShadowMaps - [5] Primary rays are fired that calculate diffuse lighting and use a rasterized shadow map.
  • Diffuse&ShadowRays - [6] Fully-raytraced pass that shoots primary rays for diffuse lights and recursively fires shadow rays.
  • Reflection Rays - [7] Hybrid pass that renders primary diffuse with rasterization and if the ground plane is detected, fires of reflections rays.

Controls:

  • forward/backward/strafe - left thumbstick or WASD (FPS controls).
  • triggers or E/Q - camera up/down .
  • right thumbstick or mouse - camera yaw/pitch.
  • F - freeze/unfreeze camera.
  • right/left - cycle through pre-set camera positions.
  • click left thumbstick or lshift - toggle slow movement.
  • back button or backspace - open debug menu.
  • dpad or arrow keys - navigate debug menu.
  • button or return - toggle debug menu item.
  • dpad left/right or left/right arrow key - adjust debug menu values.

Limitations:

  • Shadow pass is buggy due to incorrect ray generation.
  • Mipmap calculation is incorrect and uses too low of an LOD for distant objects.
  • An incorrect debug layer error message is outputted when run due to an issue in the debug layer on SM 6.0 drivers. This can be ignored. "D3D12 ERROR: ID3D12Device::CopyDescriptors: Source ranges and dest ranges overlap, which results in undefined behavior."

Requirements