Sky Keyframe

struct SkyKeyframe : public simul::sky::BaseKeyframe

The keyframe structure for simul::sky::SkyKeyframer.

The properties of any sky keyframe can be changed at any time. However, only HazeEccentricity can be changed for an in-use keyframe without triggering a recalculation of the colour tables.

Public Functions

virtual void Save(Output &os) const

Save this keyframe’s values to the stream.

virtual void Load(Input &is, platform::core::MemoryInterface *memoryInterface)

Load this keyframe’s values from the stream.

virtual void SaveToText(platform::crossplatform::TextOutput &os) const

Save this keyframe’s values to textual output.

virtual void LoadFromText(platform::crossplatform::TextInput &is)

Load from a textual input.

virtual bool HasFloat(const char *name) const

Return true if the keyframe has a float value with the given, case-insensitive, name; return false otherwise.

virtual float GetFloat(const char *name) const

Return the float value with the given, case-insensitive, name.

virtual void SetFloat(const char *name, float val)

Set the float value with the given, case-insensitive, name.

virtual bool HasInt(const char *name) const

Return true if the keyframe has an int value with the given, case-insensitive, name; return false otherwise.

virtual int GetInt(const char *name) const

Return the integer value with the given, case-insensitive, name.

virtual void SetInt(const char *name, int val)

Set the integer value with the given, case-insensitive, name.

unsigned GetTransientChecksum() const

Checksum including values not needed for GPU recalculation.

virtual vec4 GetColour(const char *name) const

Return the colour value with the given, case-insensitive, name.

virtual void SetColour(const char *name, vec4 val)

Set the colour value with the given, case-insensitive, name.

Public Members

double daytime

The time this keyframe represents, in a floating-point number of days from the starting midnight of the sequence. If simul::sky::SkyKeyframer::SetLinkKeyframeTimeAndDaytime is true, this is not used.

mutable vec4 Mie

The Mie scattering coefficients (x=red,y=green,z=blue). Mutable because of AutoMie.

float Haze

The amount of haze, mist or fog.

float HazeBaseKm

The base altitude, above which haze starts to decrease in density.

float HazeScaleKm

The vertical scale over which haze reduces with altitude.

float HazeEccentricity

The anisotropy of Mie scattering. Can be changed without recalculating tables.

float GroundFog

Thick ground fog.

float FogCeilingKm

Upper limit of ground fog.

float SeaLevelTemperatureK

Temperature at sealevel, in kelvins - mainly relevant to infra-red.

float CustomSkyColours

If true, the keyframe is stored as a colour table, rather than generating its colours from its properties.

bool AutoMie

Whether to recalculate the Mie coefficients based on the haze at this keyframe.

bool automaticSunPosition

Whether to calculate the sun position from the date and time.

struct CurrentSkyState

There are three keyframes in use. Two are complete, one is in construction. The keyframe values are interpolated from the true, control keyframes.