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This replaces the way we invoke methods and set/get properties.
This first iteration rids us of runtime type checking in those
cases, as it's now done at compile time.
Later it will also stop needing the use of reflection. After that,
we will only depend on reflection for generic Godot Array and
Dictionary. We're stuck with reflection in generic collections
for now as C# doesn't support generic/template specialization.
This is only the initial implementation. Further iterations are
coming, specially once we switch to the native extension system
which completely changes the way members are accessed/invoked.
For example, with the native extension system we will likely need
to create `UnmanagedCallersOnly` invoke wrapper methods and return
function pointers to the engine.
Other kind of members, like event signals will be receiving the
same treatment in the future.
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We're targeting .NET 5 for now to make development easier while
.NET 6 is not yet released.
TEMPORARY REGRESSIONS
---------------------
Assembly unloading is not implemented yet. As such, many Godot
resources are leaked at exit. This will be re-implemented later
together with assembly hot-reloading.
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The main focus here was to remove the majority of code that relied on
Mono's embedding APIs, specially the reflection APIs. The embedding
APIs we still use are the bare minimum we need for things to work.
A lot of code was moved to C#. We no longer deal with any managed
objects (`MonoObject*`, and such) in native code, and all marshaling
is done in C#.
The reason for restructuring the code and move away from embedding APIs
is that once we move to .NET Core, we will be limited by the much more
minimal .NET hosting.
PERFORMANCE REGRESSIONS
-----------------------
Some parts of the code were written with little to no concern about
performance. This includes code that calls into script methods and
accesses script fields, properties and events.
The reason for this is that all of that will be moved to source
generators, so any work prior to that would be a waste of time.
DISABLED FEATURES
-----------------
Some code was removed as it no longer makes sense (or won't make sense
in the future).
Other parts were commented out with `#if 0`s and TODO warnings because
it doesn't make much sense to work on them yet as those parts will
change heavily when we switch to .NET Core but also when we start
introducing source generators.
As such, the following features were disabled temporarily:
- Assembly-reloading (will be done with ALCs in .NET Core).
- Properties/fields exports and script method listing (will be
handled by source generators in the future).
- Exception logging in the editor and stack info for errors.
- Exporting games.
- Building of C# projects. We no longer copy the Godot API assemblies
to the project directory, so MSBuild won't be able to find them. The
idea is to turn them into NuGet packages in the future, which could
also be obtained from local NuGet sources during development.
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We are moving in the direction of no dynamic code generation,
so this is no longer desired.
The feature can still be easily implemented by any project that
still want it.
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We will be progressively moving most code to C#.
The plan is to only use Mono's embedding APIs to set things at launch.
This will make it much easier to later support CoreCLR too which
doesn't have rich embedding APIs.
Additionally the code in C# is more maintainable and makes it easier
to implement new features, e.g.: runtime codegen which we could use to
avoid using reflection for marshaling everytime a field, property or
method is accessed.
SOME NOTES ON INTEROP
We make the same assumptions as GDNative about the size of the Godot
structures we use. We take it a bit further by also assuming the layout
of fields in some cases, which is riskier but let's us squeeze out some
performance by avoiding unnecessary managed to native calls.
Code that deals with native structs is less safe than before as there's
no RAII and copy constructors in C#. It's like using the GDNative C API
directly. One has to take special care to free values they own.
Perhaps we could use roslyn analyzers to check this, but I don't know
any that uses attributes to determine what's owned or borrowed.
As to why we maily use pointers for native structs instead of ref/out:
- AFAIK (and confirmed with a benchmark) ref/out are pinned
during P/Invoke calls and that has a cost.
- Native struct fields can't be ref/out in the first place.
- A `using` local can't be passed as ref/out, only `in`. Calling a
method or property on an `in` value makes a silent copy, so we want
to avoid `in`.
REGARDING THE BUILD SYSTEM
There's no longer a `mono_glue=yes/no` SCons options. We no longer
need to build with `mono_glue=no`, generate the glue and then build
again with `mono_glue=yes`. We build only once and generate the glue
(which is in C# now).
However, SCons no longer builds the C# projects for us. Instead one
must run `build_assemblies.py`, e.g.:
```sh
%godot_src_root%/modules/mono/build_scripts/build_assemblies.py \
--godot-output-dir=%godot_src_root%/bin \
--godot-target=release_debug`
```
We could turn this into a custom build target, but I don't know how
to do that with SCons (it's possible with Meson).
OTHER NOTES
Most of the moved code doesn't follow the C# naming convention and
still has the word Mono in the names despite no longer dealing with
Mono's embedding APIs. This is just temporary while transitioning,
to make it easier to understand what was moved where.
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bluenote10/feature/rename_translated_to_translated_local
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- RPC configurations are now dictionaries.
- Script.get_rpc_methods renamed to Script.get_rpc_config.
- Node.rpc[_id] and Callable.rpc now return an Error.
- Refactor MultiplayerAPI to allow extension.
- New MultiplayerAPI.rpc method with Array argument (for scripts).
- Move the default MultiplayerAPI implementation to a module.
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The / operator was wrongly documented as a multiplication.
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Replace old RPC attributes with a new single `RPCAttribute` which works
like the GDScript `@rpc` annotation.
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Adds a `BezierInterpolate` method for floats in `Mathf` and for vectors
in `Vector2` and `Vector3`.
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Comments have been added for the following:
modules/mono/glue/GodotSharp/GodotSharp/Core/GodotTaskScheduler.cs
modules/mono/glue/GodotSharp/GodotSharp/Core/GodotSynchronizationContext.cs
modules/mono/glue/GodotSharp/GodotSharp/Core/Attributes/AssemblyHasScriptsAttribute.cs
modules/mono/glue/GodotSharp/GodotSharp/Core/Attributes/DisableGodotGeneratorsAttribute.cs
modules/mono/glue/GodotSharp/GodotSharp/Core/Attributes/ExportAttribute.cs
modules/mono/glue/GodotSharp/GodotSharp/Core/Attributes/GodotMethodAttribute.cs
modules/mono/glue/GodotSharp/GodotSharp/Core/Attributes/ScriptPathAttribute.cs
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- Add support for explicit values in properties using `PROPERTY_HINT_FLAGS`
that works the same way it does for enums.
- Fix enums and flags in VisualScriptEditor (it wasn't considering the
explicit value).
- Use `PROPERTY_HINT_FLAGS` for C# enums with the FlagsAttribute instead
of `PROPERTY_HINT_ENUM`.
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See https://docs.microsoft.com/en-us/dotnet/csharp/fundamentals/functional/deconstruct#user-defined-types
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String.Capitalize() in C# now matches the behaviour of String::capitalize() in C++
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in C++
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Found via ` codespell -q 3 -S ./thirdparty,*.po,./DONORS.md -L ackward,ang,ans,ba,beng,cas,childs,childrens,dof,doubleclick,expct,fave,findn,gird,hist,inout,leapyear,lod,nd,numer,ois,ony,paket,seeked,sinc,switchs,te,uint,varn`
Update editor/import/resource_importer_layered_texture.cpp
Co-authored-by: Raul Santos <raulsntos@gmail.com>
Update doc/classes/TileSetScenesCollectionSource.xml
Co-authored-by: Raul Santos <raulsntos@gmail.com>
Update scene/gui/graph_edit.cpp
Co-authored-by: Raul Santos <raulsntos@gmail.com>
Update scene/resources/animation.cpp
Co-authored-by: Raul Santos <raulsntos@gmail.com>
Update scene/resources/animation.cpp
Co-authored-by: Raul Santos <raulsntos@gmail.com>
Update scene/resources/animation.cpp
Co-authored-by: Raul Santos <raulsntos@gmail.com>
Update scene/gui/rich_text_label.cpp
Co-authored-by: Raul Santos <raulsntos@gmail.com>
Revert previously committed change
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To keep consistency with GDScript, the method `Quaternion()` is renamed
`GetQuaternion()`, and made `internal` so it's not exposed to scripting.
The documentation references are also fixed.
Also, the methods `GetQuaternion()` and `GetRotationQuaternion()` are
moved below `GetEuler()` to follow alphabetic order.
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If the class is generic, we must get its generic type definition and use
it to retrieve the delegates.
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Some cleanup with Vector3(i)'s methods so that it is consistent with Vector2, for example it returns enums internally (GDScript still gets ints).
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Renames parameters that were named differently across different
scripting languages or their documentation to use the same name
everywhere.
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Reimplement ping-pong animation and reverse playback
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