This module defines NimGodotObject and toVariant/fromVariant converters for Nim types. The converters are used by gdobj macro to import/export values from/to Godot (editor, GDScript).

You can also allow conversion of any custom type MyType by implementing:

proc godotTypeInfo*(T: typedesc[MyType]): GodotTypeInfo
proc toVariant*(self: MyType): Variant
proc fromVariant*(self: var MyType, val: Variant): ConversionResult

Implementing godotTypeInfo is optional and is necessary only if you want the type to be editable from the editor.

Types

NimGodotObject = ref object of RootObj godotObject: ptr GodotObject linkedObject: NimGodotObject ## Wrapper around native object that is the container of the Nim "script" ## This is needed for `of` checks and `as` conversions to work as ## expected. For example, Nim type may inherit from ``Spatial``, but the ## script is attached to ``Particles``. In this case conversion to ## ``Particles`` is valid, but Nim type system is not aware of that. ## This works in both directions - for linked native object this ## reference points to Nim object. isRef*: bool isFinalized: bool isNative: bool: The base type all Godot types inherit from. Manages lifecycle of the wrapped GodotObject. Source Edit
ConversionResult = enum OK, TypeError, ## Type mismatch RangeError ## Types match, but the value is out of range. ## Mainly used for numeric (ordinal) types.: Conversion result to return from fromVariant procedure. Source Edit
CallError = object of Exception err*: VariantCallError ## The error as returned by Godot: Raised by wrappers in case of an incorrect dynamic invocation. For example, if incorrect number of arguments were passed or they had unexpected types. Source Edit
GodotTypeInfo = object variantType*: VariantType hint*: GodotPropertyHint hintStr*: string ## Format depends on the type and the hint. ## For example, for Enum ``hint`` this is a comma separated list of ## values. ## See documentation of ``GodotPropertyHint`` for description of formats.: Type information provided to Godot editor Source Edit

Vars

classRegistryStatic: TableRef[cstring, ObjectInfo]: Compile-time variable used for implementation of several procedures and macros Source Edit
refClasses = newSeq(0): Source Edit

Procs

proc isFinalized(obj: NimGodotObject): bool {. inline, raises: [], tags: [] .}

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proc print(parts: varargs[string, `$`]) {. raises: [], tags: [] .}

Prints concatenated parts to Godot log. Source Edit

proc getClassName(o: NimGodotObject): string {. raises: [], tags: [] .}

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proc deinit(obj: NimGodotObject) {. raises: [], tags: [] .}

Destroy the object. You only need to call this for objects not inherited from Reference, where manual lifecycle control is necessary. Source Edit

proc nimGodotObjectFinalizer[T: NimGodotObject](obj: T)

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proc asNimGodotObject[T: NimGodotObject](godotObject: ptr GodotObject; forceNativeObject, noRef: bool = false): T

Wraps godotObject into Nim type T. This is used by godotapigen and should rarely be used by anything else. Source Edit

proc newVariant(obj: NimGodotObject): Variant {. inline, raises: [], tags: [] .}

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proc asObject[T: NimGodotObject](v: Variant): T {. inline .}

Converts v to object of type T. Returns nil if the conversion cannot be performed (v's type is not an Object or it's an object of an incompatible type) Source Edit

proc asObject(v: Variant; T: typedesc[NimGodotObject]): T:type {. inline .}

Converts v to object of type T. Returns nil if the conversion cannot be performed (v's type is not an Object or it's an object of an incompatible type) Source Edit

proc `as`[T: NimGodotObject](obj: NimGodotObject; t: typedesc[T]): T

Converts the obj into the specified type. Returns nil if the conversion cannot be performed (the obj is not of the type T)

This can be used either in dot notation (node.as(Button)) or infix notation (node as Button).

Source Edit

proc `of`[T: NimGodotObject](obj: NimGodotObject; t: typedesc[T]): bool {. inline .}

Godot-specific inheritance check. Source Edit

proc getSingleton[T: NimGodotObject](): T

Returns singleton of type T. Normally, this should not be used, because godotapigen wraps singleton methods so that singleton objects don't have to be provided as parameters. Source Edit

proc gdnew[T: NimGodotObject](): T

Instantiates new object of type T. Source Edit

proc newCallError(err: VariantCallError): ref CallError {. raises: [], tags: [] .}

Instantiates CallError from Godot err. Source Edit

proc newConversionError(err: ConversionResult): ref ValueError {. raises: [], tags: [] .}

Instantiates error raised by godotapigen generated code in case of a conversion error. Source Edit

proc setGodotObject(nimObj: NimGodotObject; obj: ptr GodotObject) {. inline, raises: [], tags: [] .}

Used from Godot constructor produced by gdobj macro. Do not call. Source Edit

proc setNativeObject(nimObj: NimGodotObject; nativeObj: NimGodotObject) {. inline, raises: [], tags: [] .}

Used from Godot constructor produced by gdobj macro. Do not call. Source Edit

proc removeGodotObject(nimObj: NimGodotObject) {. inline, raises: [], tags: [] .}

Used from Godot destructor produced by gdobj macro. Do not call. Source Edit

proc `==`(self, other: NimGodotObject): bool {. inline, raises: [], tags: [] .}

Compares objects by referential equality. Source Edit

proc godotObject(nimObj: NimGodotObject): ptr GodotObject {. inline, raises: [], tags: [] .}

Returns raw poitner to GodotObject. Use only if you know what you are doing. Source Edit

proc godotTypeInfo(T: typedesc[NimGodotObject]): GodotTypeInfo {. inline .}

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proc toVariant(self: NimGodotObject): Variant {. inline, raises: [], tags: [] .}

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proc fromVariant[T: NimGodotObject](self: var T; val: Variant): ConversionResult

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proc toVariant(self: Variant): Variant {. inline, raises: [], tags: [] .}

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proc fromVariant(self: var Variant; val: Variant): ConversionResult {. inline, raises: [], tags: [] .}

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proc godotTypeInfo(T: typedesc[SomeGodotOrNum]): GodotTypeInfo {. inline .}

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proc godotTypeInfo(T: typedesc[range]): VariantType {. inline .}

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proc toVariant[T: SomeGodotOrNum](val: T): Variant {. inline .}

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proc fromVariant[T: SomeSignedInt or SomeUnsignedInt](self: var T; val: Variant): ConversionResult

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proc godotTypeInfo(T: typedesc[enum]): GodotTypeInfo

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proc toVariant[T: enum](self: T): Variant {. inline .}

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proc fromVariant[T: enum](self: var T; val: Variant): ConversionResult {. inline .}

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proc fromVariant[T: SomeFloat](self: var T; val: Variant): ConversionResult

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proc fromVariant[T: SomeGodot](self: var T; val: Variant): ConversionResult

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proc godotTypeInfo(T: typedesc[string]): GodotTypeInfo {. inline .}

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proc toVariant(s: string): Variant {. inline, raises: [], tags: [] .}

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proc fromVariant(s: var string; val: Variant): ConversionResult {. raises: [], tags: [] .}

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proc godotTypeInfo(T: typedesc[seq]): GodotTypeInfo

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proc godotTypeInfo(T: typedesc[array]): GodotTypeInfo

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proc toVariant[T](s: seq[T]): Variant

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proc toVariant[I, T](s: array[I, T]): Variant

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proc fromVariant[T](s: var seq[T]; val: Variant): ConversionResult

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proc fromVariant[T: array](s: var T; val: Variant): ConversionResult

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proc godotTypeInfo(T: typedesc[Table | TableRef]): GodotTypeInfo {. inline .}

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proc toVariant[T: Table or TableRef](t: T): Variant

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proc fromVariant[T: Table or TableRef](t: var T; val: Variant): ConversionResult

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proc getNativeLibHandle(): pointer {. raises: [], tags: [] .}

Returns NativeScript library handle used to register type information in Godot. Source Edit

proc registerFrameCallback(cb: proc () {. closure .}) {. raises: [], tags: [] .}

Source Edit

Templates

template printWarning(warning: typed): Prints warning to Godot log, adding filename and line information. Source Edit
template printError(error: typed): Prints error to Godot log, adding filename and line information. Source Edit
template registerClass(T: typedesc; godotClassName: cstring; native: bool): Registers the specified Godot type. Used by gdobj macro and godotapigen. Source Edit

Module godotnim

Imports

Types

Vars

Procs

Templates