API Reference

Types are in CrimsonInput unless noted. BP = Blueprint-callable; BP (pure) = Blueprint pure node; C++ only = no Blueprint node. The binding templates on UCrimsonInputComponent are C++ only.

Config & component

Type	Kind	Description
`UCrimsonInputConfig`	`UDataAsset` (Const)	Maps `UInputAction` assets to tags across `NativeInputActions`, `AbilityInputActions`, `UIInputActions`. BP: `FindNativeInputActionForTag`, `FindAbilityInputActionForTag`, `FindUIInputActionForTag`.
`FCrimsonInputAction`	Struct (BlueprintType)	One `TObjectPtr<const UInputAction>` + `FGameplayTag` pair; the element type of all three config lists.
`UCrimsonInputComponent`	`UEnhancedInputComponent`	C++ only: `BindNativeAction` (tag -> callback, one `ETriggerEvent`), `BindAbilityActions` (press `Triggered`; release `Completed`+`Canceled`; callback `void(FGameplayTag)`), `BindAbilityActionsWithAction` (press `Started`; release `Completed`+`Canceled`; callback `void(UInputAction, FGameplayTag)`), `RemoveBinds`. BP but reserved no-op:* `AddInputMappings` / `RemoveInputMappings` currently do nothing - apply IMCs with `UCrimsonInputHelpers::AddMappingContextWithChordTriggers` instead.

Modifiers & settings provider

Type	Kind	Description
`ICrimsonInputSettingsProvider`	UInterface	Implement on your `ULocalPlayer`. C++ virtuals `GetGamepadMoveStickDeadZone`, `GetGamepadLookStickDeadZone`, `GetGamepadLookSensitivityPreset`, `GetGamepadTargetingSensitivityPreset`, `GetInvertVerticalAxis`, `GetInvertHorizontalAxis`, `GetSharedSettingsObject` (C++ only). Each has a `K2_` BP BlueprintNativeEvent the virtual defaults to.
`UCrimsonInputModifierDeadZone`	`UInputModifier`	Radial/Axial deadzone. Lower threshold from the provider (`DeadzoneStick` = Move/Look); `Type`, `UpperThreshold` are properties. `NotBlueprintable`.
`UCrimsonInputModifierGamepadSensitivity`	`UInputModifier`	Scales look by `SensitivityLevelTable->SensitivityEnumToFloat()` at the player's preset. `TargetingType` (Normal/ADS) selects which preset; `AimingStateTag`, when set, overrides it with the targeting preset for as long as the pawn's ability system owns that tag. Warns once if `SensitivityLevelTable` is unset. `NotBlueprintable`.
`UCrimsonInputModifierAimInversion`	`UInputModifier`	Inverts X and/or Y from provider flags. No properties. `NotBlueprintable`.
`UCrimsonSettingBasedScalar`	`UInputModifier`	Scales axes by named `float`/`double` properties read from `GetSharedSettingsObject()` via reflection. `X/Y/ZAxisScalarSettingName`, `Min/MaxValueClamp`. `NotBlueprintable`.
`ECrimsonTargetingType`	Enum (BlueprintType)	`Normal` / `ADS` - which sensitivity preset the gamepad modifier reads when `AimingStateTag` is unset or the tag is absent.
`EDeadzoneStick`	Enum (BlueprintType)	`MoveStick` / `LookStick` - which deadzone value the deadzone modifier reads.

Chord system & rebinding

Type	Kind	Description
`UInputTriggerCrimsonDynamicChord`	`UInputTrigger`	Enforces a modifier chord (exact match; gamepad bypass). `DefaultChord` (inline default), `MappingName` (set to opt into per-player overrides), `bOverrideSlot`/`OverrideSlot`. `NotBlueprintable`, `NotInputConfigurable`.
`UInputTriggerCrimsonPressAndHold`	`UInputTrigger`	Explicit trigger for Tap/Hold/Toggle: `Triggered` once on actuation, `Ongoing` while held, `Completed` on real release. No properties.
`FCrimsonChordRequirement`	Struct (BlueprintType)	`RequiredModifiers` (`Input.Modifier.*` tags) and `RequiredModifierKeys` (`FKey`), both `SaveGame`. `IsEmpty()`, `Contains()`, `GetDisplayName(FKey, bLongDisplayName)`, `GetModifierPrefix()`.
`UCrimsonInputUserSettings`	`UEnhancedInputUserSettings`	Per-player chord persistence (`ChordMappings`, `SaveGame`). BP: `SetChordRequirement`, `GetChordRequirement`, `GetChordRequirementWithDefaults`, `ClearChordRequirement`, `ClearAllChordRequirements`, `OnSettingsApplied` (BlueprintNativeEvent). BP (pure): `HasChordRequirement`, `FindChordConflict`. Reach it via the subsystem's `Get Enhanced Input User Settings` then cast.
`FCrimsonChordMappingEntry`	Struct (SaveGame)	`MappingName` + `Slot` + `FCrimsonChordRequirement`; the persisted array element in `UCrimsonInputUserSettings`.
`UCrimsonPlayerMappableKeySettings`	`UPlayerMappableKeySettings`	Attach to a `UInputAction` for the rebindable flow; its `Name` keys the per-player overrides. `bApplyDynamicChordTrigger` (default `true`) opts the action's mappings in or out of auto-injected chord triggers - untick it for actions another system chord-gates. BP (pure): `GetTooltipText`; `Tooltip` property.
`UCrimsonInputSettings`	`UDeveloperSettings` (Config=Game)	Project Settings -> Crimson -> Crimson Input Settings. Owns the modifier registry (`ModifierDefinitions`: one `FCrimsonInputModifierDefinition` per chord modifier) + `UIConfirmAction`/`UIBackAction`. BP (pure): `GetUIConfirmAction`, `GetUIBackAction`. (`static Get()` and `GetModifierDefinitions()` are C++ only.)
`UCrimsonInputHelpers`	`UBlueprintFunctionLibrary`	BP: `CreateIMCWithChordTriggers`, `AddMappingContextWithChordTriggers` (subsystem), `AddMappingContextToPlayerWithChordTriggers` (local player).
`UCrimsonInputDisplayStatics`	`UBlueprintFunctionLibrary`	The one resolver for "what key plus modifiers is this action bound to right now". BP (pure): `GetActionDisplayText(LocalPlayer, Action, bLongDisplayName)` - the formatted key+chord label. BP: `DescribeModifierState`. C++ only: `ResolveActionBinding`, `GetChordForMapping`, `GetModifierDisplayKeys`, `DoesHeldStateSatisfy`.

Sensitivity & extension bases

Type	Kind	Description
`UCrimsonAimSensitivityData`	`UPrimaryDataAsset` (Const)	`TMap<ECrimsonGamepadSensitivity, float> SensitivityMap`. BP (pure): `SensitivityEnumToFloat`.
`ECrimsonGamepadSensitivity`	Enum (BlueprintType)	10 named presets (`Slow` ... `Insane`). Defined in `Input/CrimsonSensitivityTypes.h`.
`UCrimsonPlayerInput`	`UEnhancedPlayerInput`	Thin extension point for player-input processing (telemetry, latency markers). Optional; dormant in the shipped project.
`UCrimsonPlayerMappableKeyProfile`	`UEnhancedPlayerMappableKeyProfile`	Fires `OnProfileEquipped` / `OnProfileUnequipped` BlueprintNativeEvents on key-profile change.

Game feature actions

Added to a Game Feature Data asset's Actions array. Both derive from UCrimsonInputGameFeatureAction_WorldActionBase and undo themselves on deactivate. See How-To: Add Input with a Game Feature.

Type	Kind	Description
`UCrimsonGameFeatureAction_AddInputContextMapping`	`UGameFeatureAction` ("Add Input Context Mapping")	`InputMappings` - applies each context to every local player through `AddMappingContextWithChordTriggers` and removes it on deactivate. Needs nothing on the pawn.
`FCrimsonInputMappingContextAndPriority`	Struct (BlueprintType)	One `InputMappings` entry: `InputMapping` (soft `UInputMappingContext`), `Priority` (higher applies over lower), `bRegisterWithSettings` (also register the IMC with the Enhanced Input user-settings subsystem, default `true`).
`UCrimsonGameFeatureAction_AddInputBinding`	`UGameFeatureAction` ("Add Input Binding")	`InputConfigs` - hands each soft `UCrimsonInputConfig` to the pawn's `ICrimsonInputConfigReceiver` on activate and takes it back on deactivate. Binds nothing when no receiver is found.
`ICrimsonInputConfigReceiver`	UInterface (C++ only)	What a pawn, or one of its components, implements to receive those configs: `IsReadyToBindInputs()`, `AddAdditionalInputConfig(const UCrimsonInputConfig)`, `RemoveAdditionalInputConfig(const UCrimsonInputConfig)`, plus the static `FindReceiver(AActor*)` - actor first, then the first component that implements it. `CannotImplementInterfaceInBlueprint`.
`UCrimsonInputComponent::NAME_BindInputsNow`	`static const FName` (`"BindInputsNow"`)	The extension event both actions listen for. Send it through `UGameFrameworkComponentManager` on the player controller and the pawn once input is bound, and every already-active feature re-applies. BP: the manager's `Send Extension Event` node with this name.

Related types you will call, from elsewhere

The GAS entries are Epic's own and ship with the GameplayAbilities plugin. The CrimsonCore entry is listed for orientation only - CrimsonCore is free to download but compiles only with all Crimson plugins installed, and every recipe on this wiki has a standalone equivalent that needs none of it.

Type	Ships with	Why it matters here
`UAbilitySystemBlueprintLibrary::GetAbilitySystemComponent`	GameplayAbilities (Epic)	BP + C++ - resolves the ASC through `IAbilitySystemInterface`, the entry point for every ability-input forward. See How-To: Bind Ability Input.
`UAbilitySystemComponent::TryActivateAbilitiesByTag`	GameplayAbilities (Epic)	BP - activates every granted ability whose Asset Tags contain the input tag. This is the Blueprint ability-input path.
`UAbilitySystemComponent::AbilitySpecInputPressed` / `AbilitySpecInputReleased`	GameplayAbilities (Epic)	C++ - delivers a press or release edge to an already-active ability, which is how the C++ forwarder gets a true release.
`ACrimsonCharacter`, `UCrimsonPawnData`	CrimsonCore (orientation only)	The Blueprint fast path: subclass the character, set `PawnData->InputConfig`, and all input auto-binds. See Concept: Full-Stack Integration & Multiplayer.