Moved to a different expression parsing system, which performs significantly better than the previous one.
FPS no longer drops when rendering large quantities of populate objects.
Overall improved various parts of Celestial, which should result in better performance.

Triangle Fan Objects

Added a new type of celestial object: "triangle_fan". Triangle fans can be used to create circular objects and twilight effects.

Twilight Objects

Added a new type of celestial object: "twilight". Twilight objects can be used to create custom twilight effects (ex. custom sunrises/sunsets).
As a result, twilight settings in the environment category have been deprecated, and will be removed in an upcoming update.

Sky Objects

Changed default base degree rotations for x and z to be 0 degrees.
Added "legacy_rotations" boolean to dimensions.json, which the default base degree rotations for x and z back to -90 degrees.
Changed default values for unset options to be greater than 0.

Local Variables

Variables can now be registered directly in a sky object file, within the "local_variables" json object list.
Local variables can only be used in the sky object it was registered in.

Vertex List

Added "alpha" and "color" entries to individual vertex points.
Slightly improved vertex list rendering performance.

Error Messages

Improved error messages to be more easier to read visually, and to be significantly more useful.
Error messages will state where they occured, and will be slightly more specific as to what is causing the issue.
Error messages will also state if they occured during compilation, or if they occured after.
An error message will now occur when a texture path is invalid.

Color Entries

Added global color entries, located in "celestial/sky/color_entries.json". Global color entries are color entries that can be registered and used in place of HEX color values.
Removed "inherit" option from color entries, as "#skyColor" and "#fogColor" can be used instead. Color Entry Overrides
Renamed "alpha" entry to "ratio".
Added "red_ratio", "gren_ratio", "blue_ratio" entries, which control the ratio of each color.
Added "red", "green", and "blue" entries.
Added three new variables for color entry overrides: "red", "green", and "blue" (Returns the RGB values before the color override is applied). Color Entry Blend Types
Added "blend_type" entry, which determines the method for blending the color override with the base color.
Added "linear_interpolation" blend type, which is the default blend type.
Added "override" blend type, which completely overrides the original color. Useful when using the "red", "green", and "blue" variables. Ratios are ignored for this blend type.
Added "lab" blend type, which uses LAB colors instead of RGB colors when blending. Results in much nicer color blend gradients when used.
Added "apply_fog_additions" blend type, which applies additional fog effects from twilight objects.

Sky Boxes

Sky boxes can now be rotated using base degree rotation values.
Removed unnecessary "texture" entry in skybox properties

Variables and Functions

Removed requirement for variable calls to start with a hashtag. Hashtags will however still be accepted in equations, and will simply be ignored.
Renamed "rainLevel" to "rainAlpha", and changed it to no longer return "1 - (Rain level)".
Renamed "thunderGradient" to "thunderAlpha"
Renamed function "isInBiome" to "inBiome".
Renamed function "isUsing" to "rightClickingWith".
Renamed function "isMiningWith" to "leftClickingWith".
Renamed function "isHolding" to "holding".
Renamed function "isInArea" to "inArea".
Renamed function "distanceToBiomeIgnoreY" to "distanceToBiomeFlat".
Changed function "distanceToBiome" arguments to "distanceToBiome([Distance], [Biome Name]...)".
Changed function "distanceToBiomeFlat" arguments to "distanceToBiomeFlat([Distance], [Y Position], [Biome Name]...)".
Changed function "inBiome" arguments to "inBiome([Biome Name]...)".
Changed function "holding" arguments to "holding([Item ID]...)".
Changed function "leftClickingWith" arguments to "leftClickingWith([Item ID]...)".
Changed function "rightClickingWith" arguments to "rightClickingWith([Item ID]...)".
Renamed variable "isRightClicking" to "rightClicking".
Renamed variable "isLeftClicking" to "leftClicking".
Renamed variable "isSubmerged" to "submerged".
Renamed variable "getGameTime" to "gameTime".
Renamed variable "getWorldTime" to "worldTime".
Renamed variable "getDayTime" to "dayTime".
Renamed variable "xPos" to "posX".
Renamed variable "yPos" to "posY".
Renamed variable "zPos" to "posZ".
Replaced "[Number]m[Min]" format with function "min([Number], [Min]...)".
Replaced "[Number]M[Max]" format with function "max([Number], [Max]...)".
Added variable "bossSkyDarken", which returns the percent of the fog darken effect created by withers/ender dragons.
Added function "colorEntryRed([Color Entry Name])", which returns the red value of a color entry.
Added function "colorEntryGreen([Color Entry Name])", which returns the green value of a color entry.
Added function "colorEntryBlue([Color Entry Name])", which returns the blue value of a color entry.
Added function "modulo([Number], [Divisor])", which returns the modulo of a number.
Added function "repeat([Number], [Lower Bounds], [Upper Bounds])", which clamps a number between two bounds but returns repeating values when going beyond the bounds.
Added function "clamp([Number], [Lower Bounds], [Upper Bounds])", which clamps a number between two bounds.
Added function "lerp([Number 1], [Number 2], [0-1 Ratio])", which returns the linear interpolation between two numbers.
Added function variant of "starAlpha", "starAlpha([Sky Angle])", which allows for a custom sky angle as an argument.
Added function variant of "dayLight", "dayLight([Sky Angle])", which allows for a custom sky angle as an argument.

Twilight Functions

Added various functions to help with the creation of custom twilight effects.
Added function "twilightAlpha([Sky Angle])", which returns the alpha of the twilight effect for a specific sky angle.
Added function "twilightProgress([Sky Angle])", which returns how far the twilight has progressed for a specific sky angle.
Added function "twilightFogEffect([Sky Angle])", which returns the alpha of the twilight fog effect for a specific sky angle.

Sky Object Properties

Added "blend" option, which determines if the object should have transparency blending.
Removed "red", "green", and "blue" entries, as the "color" entry can be used instead.
Removed "ignore_fog", since it didn't really do anything.