GMU:I and my Max/Elizabeth McTernan: Difference between revisions

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Elizabeth McTernan

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+FEBRUARY 2021
+Final patch:
+[[:File:210201_ultrasonic_drawing.maxpat]]
+'''Project Summary'''
+''Sounding Landshapes'' – digital drawings of objects as sensed with sound. Data collected by scanning objects repeatedly over time with a self-devised ultrasonic sensor device.
+Sounding is traditionally a technique by which a boat, outfitted with a sonar device, floats atop the surface of a body of water and measures its depths. Meanwhile, sonography is a method that uses sound to read and image surfaces, most commonly in medicine and geology. In this work, I am interested in sounding as the action and sonography in the sense of its literal etymological meaning “drawing with sound.”
+I have chosen sound over other higher-precision options, such as lasers, because I am interested in sound as a specifically Earth-bound medium – sound cannot travel through the void of outer space, so it is a particularly Earthly medium; it is explicitly terrestrial. This interests me when trying to (re)connect to the Earth through artistic practice, using sensors beyond my own body’s senses.
+After having made a series of 2D hypothetical sounding studies using ink on paper, I have built my own self-devised sonar tool in the hope of extending the hypothetical 2D sounding studies of my drawings into the 3D space of the “real” world. For the Max/MSP aspect of the project, I mounted the ultrasonic sensor device on my hand and passed it over objects at a steady pace in a level line, so I could still make sense of the data while also having more freedom for imperfection and gesture over a duration of time. So, to take readings, I move my hand back and forth like a scanner over the surface of whatever object I put on the ground. The sensor obtains a reading by emitting regular ultrasonic clicks that hit the surface of the object and then bounce back to the device. The data collected during this process is sent into Max/MSP and used to reconstitute the form of the object in digital space (via a jit.lcd object). The resulting image is the object as seen through sound. Below is my process over several months to develop a Max/MSP patch to this end, along with the resulting images.
+JANUARY 2021
+With Miga's help I was finally able to offset the lines of the digital drawings so that they layer in a more interesting way. I've uploaded my updated patch here, to which I've added some notes so it's easier for everyone to access:
+[[:File:210125_ultrasonic_drawing.maxpat]]
+I've also made a video screen capture, so you can see the patch in action:
+[https://vimeo.com/504393675 Jit.lcd drawing with ultrasonic sensor input]
+A new question has arisen: How do I make it so that every time the data input restarts (after having been stopped), it restarts at the far left of the window rather than in the middle? You can see in my video that when I restart the data input, the lines start from the middle of the window, not the far left. This makes things too messy when I want to start a fresh image.
+<gallery>
+File:Screen Shot 2021-01-27 at 3.43.57 PM.png
+</gallery>
+Below are my most recent ultrasonic scans of a stool.
+[[File:Screen Shot 2021-01-20 at 23.49.23.png|400px]]
+[[File:Screen Shot 2021-01-20 at 23.51.14.png|400px]]
+[[File:Screen Shot 2021-01-20 at 23.54.48.png|400px]]
+Here are two more free-hand versions:
+[[File:Screen Shot 2021-01-20 at 22.18.56.png|400px]]
+[[File:Screen Shot 2021-01-25 at 15.10.24.png|400px]]
+JANUARY 2021
+Just for fun, now that I've figured out fullscreen mode, here's a screenshot of the visualization without the fade, so the mappings simply layer on top of each other. Now you see that it could be more aesthetically interesting to have the lines offset so the next layer doesn't always erase the last (although I do like the idea of keeping a palimpsestic element).
+[[File:Screen Shot 2021-01-18 at 17.15.43.png|400px]]
+And two more of sounding a stool free-hand:
+[[File:Screen Shot 2021-01-19 at 16.38.29.png|400px]]
+[[File:Screen Shot 2021-01-19 at 16.45.11.png|400px]]
+JANUARY 2021
+Just FYI, I figured out how to output my jit.lcd visual to fullscreen via a jit.window. Here is the link to the tutorial I used: https://docs.cycling74.com/max5/tutorials/jit-tut/jitterchapter38.html
+And here is my updated project patch:
+[[:File:210116_ultrasonic_drawing_with_fullscreen.maxpat]]
+JANUARY 2021
+The starting point of my counter is also recognizable as the starting point of my line segments moving from left to right. In order to shift this starting point over by one pixel every other round, so that the layering lines are offset, I had the idea to define an if/then statement by even and odd numbers (that is, integers that are divisible by 2 versus those that are not), assign them the numbers 1 and 2, and then select 1 for a certain operation and 2 for another. The patch successfully gives off respective bangs for evens and odds, and even appears to apply the addition object when triggered, but the addition of +1 and -1 at the bottom still doesn't work when applied to my bigger project patch, and I don't know why yet.
+Here is the smaller patch focused on selecting evens and odds:
+[[:File:210115_odd&even.maxpat]]
+And here is my current main patch (using the number slider rather than my sensor data, so you can use it without the sensor), where the line does not appear to be offset every other round as I intended. Maybe it's simply not connected up properly?
+[[:File:210115_ultrasonic_drawing.maxpat]]
+Regarding my main patch above, I have one additional small question. For the object "jit.op @op + @val 1" (which you can see on the left), I would like to slow down how often the value is added (like maybe every 4th bang rather than every bang?), if that's the right way to think about it? That way the lines wouldn't fade as quickly in the image. The goal is to have more layering than is happening now. Any suggestions?
 JANUARY 2021