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SDL_DollarGestureEvent

A structure that contains complex gesture event information.

Data Fields

Uint32

type

SDL_DOLLARGESTURE or SDL_DOLLARRECORD

Uint32

timestamp

timestamp of the event

SDL_TouchID

touchId

the touch device id

SDL_GestureID

gestureId

the unique id of the closest gesture to the performed stroke

Uint32

numFingers

the number of fingers used to draw the stroke

float

error

the difference between the gesture template and the actual performed gesture (lower error is a better match)

float

x

the normalized center of gesture

float

y

the normalized center of gesture

Remarks

SDL_DollarGestureEvent is a member of the SDL_Event union and is used when an event of type SDL_DOLLARGESTURE is reported. You would access it through the event's dgesture field.

x and y are in range 0 to 1.

For SDL_DOLLARRECORD only touchId and gestureId are valid.

For more information see: README-gesture.md

SDL_EventType
SDL_Event
SDL_MultiGestureEvent

CategoryStruct, CategoryEvents, CategoryDraft


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