private static unsafe void Precompute1(MyAtmosphere atmosphere, ref AtmosphereLuts luts)
{
var RC = MyImmediateRC.RC;
var cb = MyCommon.GetObjectCB(sizeof(AtmosphereConstants));
RC.ComputeShader.SetConstantBuffer(1, cb);
var worldMatrix = atmosphere.WorldMatrix;
worldMatrix.Translation -= MyRender11.Environment.Matrices.CameraPosition;
var constants = FillAtmosphereConstants(MyRender11.Environment.Matrices.CameraPosition, atmosphere);
var mapping = MyMapping.MapDiscard(cb);
mapping.WriteAndPosition(ref constants);
mapping.Unmap();
// transmittance
RC.ComputeShader.SetUav(0, luts.TransmittanceLut);
RC.ComputeShader.Set(m_precomputeDensity);
RC.Dispatch(512 / 8, 128 / 8, 1);
RC.ComputeShader.SetUav(0, null);
}
internal unsafe static void Precompute1(MyAtmosphere atmosphere, ref AtmosphereLuts luts)
{
var RC = MyImmediateRC.RC;
float radiusGround = atmosphere.PlanetRadius;
float RadiusAtmosphere = atmosphere.AtmosphereRadius;
var cb = MyCommon.GetObjectCB(sizeof(AtmospherePrecomputeConstants));
RC.Context.ComputeShader.SetConstantBuffer(1, cb);
AtmospherePrecomputeConstants constants = new AtmospherePrecomputeConstants();
constants.RadiusGround = radiusGround;
constants.RadiusAtmosphere = RadiusAtmosphere;
constants.RadiusLimit = RadiusAtmosphere + 1;
constants.HeightScaleRayleighMie = atmosphere.HeightScaleRayleighMie;
constants.BetaRayleighScattering = atmosphere.BetaRayleighScattering;
constants.BetaMieScattering = atmosphere.BetaMieScattering;
var mapping = MyMapping.MapDiscard(cb);
mapping.stream.Write(constants);
mapping.Unmap();
// transmittance
RC.Context.ComputeShader.SetUnorderedAccessView(0, luts.TransmittanceLut.Uav);
RC.SetCS(m_precomputeDensity);
RC.Context.Dispatch(256 / 8, 64 / 8, 1);
RC.Context.ComputeShader.SetUnorderedAccessView(0, null);
// inscatter 1
RC.Context.ComputeShader.SetShaderResource(0, luts.TransmittanceLut.ShaderView);
RC.SetCS(m_precomputeInscatter1);
RC.Context.ComputeShader.SetUnorderedAccessViews(0, luts.InscatterLut.Uav);
RC.Context.Dispatch(32 / 8, 128 / 8, 32 * 8);
RC.Context.ComputeShader.SetUnorderedAccessViews(0, null as UnorderedAccessView, null as UnorderedAccessView);
}
internal unsafe static void Precompute1(MyAtmosphere atmosphere, ref AtmosphereLuts luts)
{
var RC = MyImmediateRC.RC;
float radiusGround = atmosphere.PlanetRadius;
float RadiusAtmosphere = atmosphere.AtmosphereRadius;
var cb = MyCommon.GetObjectCB(sizeof(AtmospherePrecomputeConstants));
RC.DeviceContext.ComputeShader.SetConstantBuffer(1, cb);
var worldMatrix = atmosphere.WorldMatrix;
worldMatrix.Translation -= MyEnvironment.CameraPosition;
AtmospherePrecomputeConstants constants = new AtmospherePrecomputeConstants();
// Raise the ground a bit for better sunsets
constants.RadiusGround = radiusGround * 1.01f * atmosphere.Settings.SeaLevelModifier;
constants.RadiusAtmosphere = RadiusAtmosphere * atmosphere.Settings.AtmosphereTopModifier;
constants.HeightScaleRayleighMie = atmosphere.HeightScaleRayleighMie * new Vector2(atmosphere.Settings.RayleighHeight, atmosphere.Settings.MieHeight);
constants.BetaRayleighScattering = atmosphere.BetaRayleighScattering / atmosphere.Settings.RayleighScattering;
constants.BetaMieScattering = atmosphere.BetaMieScattering / atmosphere.Settings.MieColorScattering;
constants.MieG = atmosphere.Settings.MieG;
constants.PlanetScaleFactor = atmosphere.PlanetScaleFactor;
constants.AtmosphereScaleFactor = atmosphere.AtmosphereScaleFactor;
constants.PlanetCentre = (Vector3)worldMatrix.Translation;
constants.Intensity = atmosphere.Settings.Intensity;
var mapping = MyMapping.MapDiscard(cb);
mapping.WriteAndPosition(ref constants);
mapping.Unmap();
// transmittance
RC.DeviceContext.ComputeShader.SetUnorderedAccessView(0, luts.TransmittanceLut.Uav);
RC.SetCS(m_precomputeDensity);
RC.DeviceContext.Dispatch(512 / 8, 128 / 8, 1);
RC.DeviceContext.ComputeShader.SetUnorderedAccessView(0, null);
}
private static AtmosphereConstants FillAtmosphereConstants(Vector3D cameraPosition, MyAtmosphere atmosphere)
{
var position = atmosphere.WorldMatrix.Translation - cameraPosition;
double distance = position.Length();
double atmosphereTop = atmosphere.AtmosphereRadius * atmosphere.Settings.AtmosphereTopModifier *
atmosphere.PlanetScaleFactor * atmosphere.Settings.RayleighTransitionModifier;
float t = 0.0f;
if (distance > atmosphereTop)
{
if (distance > atmosphereTop * 2.0f)
{
t = 1.0f;
}
else
{
t = (float)((distance - atmosphereTop) / atmosphereTop);
}
}
var rayleighHeight = MathHelper.Lerp(atmosphere.Settings.RayleighHeight, atmosphere.Settings.RayleighHeightSpace, t);
return(new AtmosphereConstants
{
PlanetCentre = position,
AtmosphereRadius = atmosphere.AtmosphereRadius * atmosphere.Settings.AtmosphereTopModifier,
GroundRadius = atmosphere.PlanetRadius * 1.01f * atmosphere.Settings.SeaLevelModifier,
BetaRayleighScattering = atmosphere.BetaRayleighScattering / atmosphere.Settings.RayleighScattering,
BetaMieScattering = atmosphere.BetaMieScattering / atmosphere.Settings.MieColorScattering,
HeightScaleRayleighMie = atmosphere.HeightScaleRayleighMie * new Vector2(rayleighHeight, atmosphere.Settings.MieHeight),
// precompute:
//HeightScaleRayleighMie = atmosphere.HeightScaleRayleighMie * new Vector2(atmosphere.Settings.RayleighHeight, atmosphere.Settings.MieHeight),
MieG = atmosphere.Settings.MieG,
PlanetScaleFactor = atmosphere.PlanetScaleFactor,
AtmosphereScaleFactor = atmosphere.AtmosphereScaleFactor,
Intensity = atmosphere.Settings.Intensity,
FogIntensity = atmosphere.Settings.FogIntensity
});
}
internal unsafe static void Precompute1(MyAtmosphere atmosphere, ref AtmosphereLuts luts)
{
var RC = MyImmediateRC.RC;
float radiusGround = atmosphere.PlanetRadius;
float RadiusAtmosphere = atmosphere.AtmosphereRadius;
var cb = MyCommon.GetObjectCB(sizeof(AtmospherePrecomputeConstants));
RC.ComputeShader.SetConstantBuffer(1, cb);
var worldMatrix = atmosphere.WorldMatrix;
worldMatrix.Translation -= MyRender11.Environment.Matrices.CameraPosition;
AtmospherePrecomputeConstants constants = new AtmospherePrecomputeConstants();
// Raise the ground a bit for better sunsets
constants.RadiusGround = radiusGround * 1.01f * atmosphere.Settings.SeaLevelModifier;
constants.RadiusAtmosphere = RadiusAtmosphere * atmosphere.Settings.AtmosphereTopModifier;
constants.HeightScaleRayleighMie = atmosphere.HeightScaleRayleighMie * new Vector2(atmosphere.Settings.RayleighHeight, atmosphere.Settings.MieHeight);
constants.BetaRayleighScattering = atmosphere.BetaRayleighScattering / atmosphere.Settings.RayleighScattering;
constants.BetaMieScattering = atmosphere.BetaMieScattering / atmosphere.Settings.MieColorScattering;
constants.MieG = atmosphere.Settings.MieG;
constants.PlanetScaleFactor = atmosphere.PlanetScaleFactor;
constants.AtmosphereScaleFactor = atmosphere.AtmosphereScaleFactor;
constants.PlanetCentre = (Vector3)worldMatrix.Translation;
constants.Intensity = atmosphere.Settings.Intensity;
var mapping = MyMapping.MapDiscard(cb);
mapping.WriteAndPosition(ref constants);
mapping.Unmap();
// transmittance
RC.ComputeShader.SetUav(0, luts.TransmittanceLut);
RC.ComputeShader.Set(m_precomputeDensity);
RC.Dispatch(512 / 8, 128 / 8, 1);
RC.ComputeShader.SetUav(0, null);
}
internal unsafe static void Precompute1(MyAtmosphere atmosphere, ref AtmosphereLuts luts)
{
var RC = MyImmediateRC.RC;
float radiusGround = atmosphere.PlanetRadius;
float RadiusAtmosphere = atmosphere.AtmosphereRadius;
var cb = MyCommon.GetObjectCB(sizeof(AtmospherePrecomputeConstants));
RC.Context.ComputeShader.SetConstantBuffer(1, cb);
AtmospherePrecomputeConstants constants = new AtmospherePrecomputeConstants();
constants.RadiusGround = radiusGround;
constants.RadiusAtmosphere = RadiusAtmosphere;
constants.RadiusLimit = RadiusAtmosphere + 1;
constants.HeightScaleRayleighMie = atmosphere.HeightScaleRayleighMie;
constants.BetaRayleighScattering = atmosphere.BetaRayleighScattering;
constants.BetaMieScattering = atmosphere.BetaMieScattering;
var mapping = MyMapping.MapDiscard(cb);
mapping.stream.Write(constants);
mapping.Unmap();
// transmittance
RC.Context.ComputeShader.SetUnorderedAccessView(0, luts.TransmittanceLut.Uav);
RC.SetCS(m_precomputeDensity);
RC.Context.Dispatch(256 / 8, 64 / 8, 1);
RC.Context.ComputeShader.SetUnorderedAccessView(0, null);
// inscatter 1
RC.Context.ComputeShader.SetShaderResource(0, luts.TransmittanceLut.ShaderView);
RC.SetCS(m_precomputeInscatter1);
RC.Context.ComputeShader.SetUnorderedAccessViews(0, luts.InscatterLut.Uav);
RC.Context.Dispatch(32 / 8, 128 / 8, 32 * 8);
RC.Context.ComputeShader.SetUnorderedAccessViews(0, null as UnorderedAccessView, null as UnorderedAccessView);
}
