FogRenderer

Remarks

A post-process rather than a per-material term, and that is what makes it affordable: fog depends on the distance from the camera to whatever was drawn, which the depth buffer already holds for every pixel of the frame. Adding it in every material's shader would mean every material carrying the fog's parameters and evaluating it whether it is on or not.

Fields and properties (23)

• public required string Source

  The colour it fogs.

• public required string Depth

  The depth it reads distance from.

• public int Mode

  Which falloff curve is used.

• public bool HeightFalloff

  Whether fog thins with altitude, as an atmosphere does.

• public bool SunScattering

  Whether looking toward the sun brightens the fog.

• public RenderView? View

  The view the two below are derived from, or null to set them by hand.

• public Matrix4x4 InverseViewProjection

  Clip back to world, when no View supplies it.

• public Vector3 CameraPosition

  Where the camera is, which the distance is measured from.

• public Vector3 Colour

  What the fog looks like away from the sun, as a radiance in cd/m², when Frame has no sky in it.

• public float Density

  How quickly it accumulates with distance.

• public float Start

  Where it begins, for the linear mode.

• public float End

  Where it is fully opaque, for the linear mode.

• public float Height

  The altitude the authored density holds at.

• public float HeightFalloffRate

  How fast density thins above Height, per world unit.

• public Vector3 SunDirection

  Which way the light travels, when no Sun answers.

• public Vector3 SunColour

  What the fog looks like straight down-sun, as a radiance in cd/m², when Sun has no directional light in it.

• public ISunSource? Sun

  Where the frame's directional light comes from, or null to use the authored pair.

• public SceneConstants? Frame

  The frame's own lighting, which is where the sky's mean radiance comes from.

• public float SunAnisotropy

  Henyey–Greenstein anisotropy, 0 isotropic to just under 1 sharply forward.

• public string Volume

  The marched volume VolumetricFogRenderer filled, or empty for the falloff alone.

• public float VolumeNear

  The volume's own near plane, in view depth.

• public float VolumeFar

  The volume's own far plane. Past this the analytic falloff is what runs.

• public int VolumeSlices

  How many slices it cut between the two.

Methods (3)

• public FogRenderer()

  Depth fog, with an optional height falloff and sun scattering.

• public void Apply(in PostProcessOverlay overlay)
• protected override void Configure(CompositorFrame frame, ParameterCollection parameters, IList<ResourceBinding> bindings)

  Fills in this frame's parameters and bindings.

Used by (3)

• PhotometricDefaultTestsVixen.Rendering.PostFx.Tests
• PostEffectFactoryVixen.Rendering.PostFx
• PostEffectTestsVixen.Rendering.PostFx.Tests