Rabbit Jump - Hand Gesture game - Non-traditional Input Game

Task

Completing the GHW Games challenge - Hand Gesture game - Non-traditional Input Game

What it does

A user can play Rabbit Jump using their hands - video sensing.

How we built it

I've built it on Scratch, using their Video Sensing extension.

Added simple sprites such as a rabbit, trees, and a ground.

For rabbit there are two scripts. First one starts when the game starts. It initiates by positioning the rabbit at (-150, -68), initial rabbit costume (animation frame) as the first costume, turning on the video, setting video transparency. Now define the animation and gravity for rabbit, along with game over condition, as below algorithm.

// rabbit - script 1
Game starts // Starting point
    Position rabbit as (-150, -68)
    Switch the costume to 1
    Turn on video and set transparency to 50
    Initialize score as 0
    Initialize costume value // used later to switch between 1 and 2
    Broadcast and display a instruction message
    While the rabbit is not touching a tree:
        If rabbit is grounded:
            Switch the costumes between 1 and 2 every 0.3 seconds
        If the rabbit is above a certain y-axis value:
            While the rabbit is not grounded:
                Slowly reduce y axis of rabbit.
            Switch costume to 4
            Set the y-axis to value of rabbit -68
            Switch costume to 1
    Stop all OTHER rabbit scripts
    Broadcast and display a game over message
    Turn off video
    Stop ALL scripts

Now in another script define how to make rabbit jump

// rabbit - script 2
If video motion over rabbit > 50:
    Switch to costume 3
    Make rabbit slowly jump to a certain height
    Wait for a second

Now create a script for tree to clone itself in a certain interval.

// tree - script 1
Broadcast for game instruction received // Starting point
    Hide the tree sprite
    Create a clone of itself
    While true: // forever
        Wait for a random time between 2 to 5 seconds
        Create a clone of itself

Define the movement of tree in another script.

// tree - script 2
When a clone is created
    Initialize position as (215, -68)
    Show the sprite
    While tree not touching screen edges:
        Slowly move the tree to the left
        If tree crosses x position of rabbit:
            Increment score
    Delete the clone

Stop all scripts when game over.

// tree - script 3
When Game Over broadcast broadcast is received
    Stop all tree scripts

Challenges we ran into

Trying to make this video sensing work.

Built With

• scratch