https://github.com/acul4321/dollar-p-recognizer-godot

a godot implementation of the $p+ point cloud recognizer
https://github.com/acul4321/dollar-p-recognizer-godot

Last synced: 3 months ago
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a godot implementation of the $p+ point cloud recognizer

• Host: GitHub
• URL: https://github.com/acul4321/dollar-p-recognizer-godot
• Owner: Acul4321
• Created: 2025-01-03T19:48:15.000Z (5 months ago)
• Default Branch: main
• Last Pushed: 2025-01-04T00:12:10.000Z (5 months ago)
• Last Synced: 2025-01-04T01:21:34.585Z (5 months ago)
• Language: GDScript
• Size: 3.91 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# dollar-p-recognizer-godot

A godot implementation of the [Dollar P+ Point Cloud Recognizer](https://depts.washington.edu/acelab/proj/dollar/pdollarplus.html)

## About

>The $P+ Point-Cloud Recognizer is a 2-D gesture recognizer designed for rapid prototyping of gesture-based user interfaces, especially for people with low vision.

>

>$P+ improves the accuracy of the $P Point-Cloud Recognizer. $P+ was developed by carefully studying the stroke-gesture performance of people with low vision, which generated insights for how to improve $P for all users.

[Radu-Daniel Vatavu](http://www.eed.usv.ro/~vatavu/), University Stefan cel Mare of Suceava

## Usage

In the Godot Project Settings, upload the **gesture_recognizer.gd** as an Autoload script(Also known as a Singleton)[^1]

![image](https://github.com/user-attachments/assets/5bb3e271-aed4-4424-821c-1b4e34345960)

Now You must define In code The Recognizer and gestures you wish to classify.

#### Demo

``` gdscript

# if Autoload has been defined as 'PRecognizer' as above, we instantiate a Recognizer class

var Recognizer = PRecognizer.PDollarPlusRecognizer.new()

# Create the gesture, each containing a name and an array of 'GesturePoint' objects

# The 'GesturePoint' object has a x , y component aswell as an id(what stoke the point belongs to) and an angle

var gestureT = PRecognizer.Gesture.new("T",[

    PRecognizer.GesturePoint.new(30,7,1),

    PRecognizer.GesturePoint.new(103,7,1),

    PRecognizer.GesturePoint.new(66,7,2),

    PRecognizer.GesturePoint.new(66,87,2)])

var gestureLine = PRecognizer.Gesture.new("Line",[

    PRecognizer.GesturePoint.new(12,347,1),

    PRecognizer.GesturePoint.new(119,347,1)])

# Register what gestures a Recognizer can classify by appending to the 'gestures' array of Gesture objects

Recognizer.gestures.append(gestureT)

Recognizer.gestures.append(gestireLine)

# To classify the gestures we call the Recognize method to match with the previously registered Gesture objects

var result = Recognizer.Recognize([

    PRecognizer.GesturePoint.new(134,220,1),

    PRecognizer.GesturePoint.new(477,178,1),

    PRecognizer.GesturePoint.new(316,218,2),

    PRecognizer.GesturePoint.new(329,430,2)])

print("Result: " + str(result.name) + " (" + str(round(result.score*100)) + ")  in " + str(round(result.time*1000)) + "ms")

# Output : Result: T (28)  in 7ms

```

[^1]: Singleton: A global script which contains functions and variables used throughtout the program.