Downward-facing light sensors

[psychemedia]

Some thought relating to pros / cons of downward facing light sensors:

• requires ability to draw (coloured) lines on the floor (i.e. to give the sensor something to sense)
  • could these be zero height boxes?
  • would they affect 3D simulation performance?
  • ability to load in a flat PNG or other image type as floor overlay
• how would sensor(s) be indicated on robot and where should they be placed? What sort of resolution should they have:
  • 0..1: "reflectivity"
  • rgb: 3-tuple

Complex behaviour can arise if you have line following robot(s) that also draw a trail of their own (does Jyro have a trail/penup/pendown?)

What sort of activity would it enable?

• line stopper
• line follower

BUT we can sort of do the same with ultrasound sensor? Line X possibly simpler to get your head round; it's also the sort of thing provided by numerous other simple edu-robotics activities so there are lots of activities and solution s to crib from.

[dsblank]

@psychemedia I'm going to take a look at this this weekend. I'm not sure yet what is possible, but I do like the idea of generating art with a pen-down, and then another being able to follow it.

[psychemedia]

Happy to test anything... I'm going start posting stuff here over the next few weeks (in the first instance, largely a simple/direct conversion of current course activities, so they may be a poor fit. Reason for doing this is so I can then compare how "natively" designed activities might differ, which may give pointers to what notebooks are good for in terms of interactive instructional design...)

[psychemedia]

"do like the idea of generating art with a pen-down, and then another being able to follow it"

We did an art piece once: a grid of differently coloured squares with an RCX Mindstorms robot with a pen on the back and a line following behaviour. In the beginning, motion appeared random as robot "followed" different coloured squares and shadows, then it would stumble on its trail and follow that for a bit, before losing the line and wandering off again. (I wanted to call it "Stigmergic exercise" ;-)

[dsblank]

Stigmergy! Bonus points :)

On Fri, Jan 17, 2020 at 6:24 AM Tony Hirst notifications@github.com wrote:

"do like the idea of generating art with a pen-down, and then another being able to follow it"

We did an art piece once: a grid of differently coloured squares with an RCX Mindstorms robot with a pen on the back and a line following behaviour. In the beginning, motion appeared random as robot "followed" different coloured squares and shadows, then it would stumble on its trail and follow that for a bit, before losing the line and wandering off again. (I wanted to call it "Stigmergic exercise" ;-)

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