Scratch and web-cams in Scratch 3

Scratch 3 was launched on 2nd January 2019, so I wanted to know would Webcams still work with Scratch 3 as it did with Scratch 2. For example, in a previous post Scratch, webcams, cats and explosions the cat (Scratch) moved across the screen and a button burst when the object moved in the camera onto it. 



Can the same thing be done in Scratch 3? The short answer is yes, but it is done slightly differently.

The first change the video capture is not there in the blocks automatically; but is an extension that needs to be added. First, you need to add the extension blocks for video sensing. Go to the little icon at the bottom left of the screen (as shown below) this takes you to the extensions menu.


Next, find the Video Sensing option and selected. The webcam, if enabled, with start automatically.

A video sensing set of blocks is now in the list of block options. 

The rest is very similar to doing this in Scratch 2.

Moving Scratch: The code below moves the cat backwards and forwards depending on whether the object is moving left to right on the screen, or not.


The bursting bubble is done with the code below. When the object in the camera is on the button; make a popping noise, switch to an image (costume) that of a burst button, wait 1 second and return to the whole button image.

The code is available at https://scratch.mit.edu/projects/276892758/ please feel free to improve it and let me know. 



All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

Top 5 posts in 2018 from the Robots and Physical Computing blog




All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

How to videos... Web based Augmented Reality


Video 1: How to produce a simple web-based augmented reality application.





Video 2: Using AFrame and AR.js to create AR - this time adding an image and rotation to an AR object.



Related Links



All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

Scratch, webcams, cats and explosions

Still enjoying playing with Scratch and webcam. in this post, initially improving on the example shown in a previous post Webcam and Scratch; enhancing the movement of Scratch the Cat by adding the interim step and facing in the direction of the 'moving finger' (see the code below).















 Please go to the code at https://scratch.mit.edu/projects/263334488/  to try it yourself.


Going to add one more feature to experiment with getting objects to react to the motion. In this case to explode a button or change a button to a small ball by moving the finger onto the button. The motion on the sprite is used to do this.



Please try the code yourself at https://scratch.mit.edu/projects/266837380/






All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

Getting Adafruit Circuit Playground Express to respond to music

In a previous post, Adafruit Circuit Playground reacting to music (updated with simulator) using vibrations to change the RGB of pixels on the Circuit Playground Express was played with (it is too much fun to not). Here I am going to go even simpler, using the sound level directly, again using MakeCode.




The circuit playground includes a microphone so sound levels can be used directly, by using them to vary the RGB inputs and brightness of the pixel (see the code above). You can try the idea out on the simulator below; the circle bottom left can be used to simulate varying the sound level. 

Please feel free to alter the code and share; the code is available at https://makecode.com/_8UPY8oD54bmE










All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

Webcam and Scratch

I have to admit I do enjoy playing with Scratch. I heard you can connect a webcam to Scratch and though there might be quite a lot of set-up. I was wrong, it is was very easy just one block really. So in this very short post, I share my (very simple) code. Getting Scratch the Cat to follow my finger left or right.





I am intrigued to see what else can be done.

Code is at https://scratch.mit.edu/projects/263334488/ 

All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

Strictly Cube:Bit

In previous posts I looked at using the 4Tronix Cube:Bit with Python (http://bit.ly/2DcXcei) or Adafruit Circuit Playground with MakeCode (http://bit.ly/2T0ddcN) both used to make a 'Disco-Light' essentially reacting to vibrations from a speaker and therefore indirectly react to music.

In this post, a short experiment with the Cube:Bit combined with MakeCode is shown. First thing once you are in https://makecode.microbit.org/# is to add the MakeCode package for the Cube released by 4tronix; details on setting this up are at https://4tronix.co.uk/blog/?p=1770.

So the basic (and it is basic) idea in the code, is change one of the pixel/LEDs colour in response to the acceleration in the three axes, with each axis controlling either the amount of Red, Green or Blue in the LED's output. The colour is shifted one pixel along each time and the process repeats. The effect is run the colours through all the LEDs. The code is shown below:





One of the other things of found I quite enjoy doing with it; is putting the cube at different angles and see what colours are produced.



All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon

Scratch and web-cams in Scratch 3

Scratch 3 was launched on 2nd January 2019, so I wanted to know would Webcams still work with Scratch 3 as it did with Scratch 2. For exampl...