nimrodkerrett
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each-name-a-star
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      2023-11-11-shtika-each-name-a-star-museum-photo-noam-amir.jpg
  3. 29
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  4. 309
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      each-name-a-star.html
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      neopixel-twinkle/neopixel-twinkle.ino
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+work/
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+*.swp
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+*.backup

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2023-11-11-shtika-each-name-a-star-museum-photo-noam-amir.jpg View File


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README.md View File 

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+**Each Name a Star** is an installation used as a centerpiece for meditation circles of [Roaring Silence](https://shtika2023.org).
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+
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+[![A meditation circle around the installation at the hostage vigil at Tel Aviv Museum square](2023-11-11-shtika-each-name-a-star-museum-photo-noam-amir.jpg)](https://cdn.masto.host/tooot/media_attachments/files/111/396/975/164/429/029/original/2f07a789e13175ae.mp4)
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+A meditation circle around the installation at the hostage vigil at Tel Aviv Museum square, November 11, 2023. Photo: Noam Amir.
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+
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+#### [Video](https://cdn.masto.host/tooot/media_attachments/files/111/396/975/164/429/029/original/2f07a789e13175ae.mp4)
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+
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+### Each Name a Star
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+
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+The installation has 3 layers
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+* A neopixel led strip (arranged in a spiral) driven by an Arduino running the [neopixel-twinkle](neopixel-twinkle) sketch.
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+* A white sheet.
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+* Projection from above of [each-name-a-star.html](each-name-a-star.html) with 180-degree rotated names (rotation makes sense when projected from above).
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+
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+### [each-name-a-star.html](https://zzzen.com/each-name-a-star.html) instructions
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+
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+If your projector can display a web browser, you can use the live version
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+
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+* The page is online [here](https://zzzen.com/each-name-a-star.html).
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+* Down arrow turns the names 180 degrees (Up arrow to reverse)
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+* Left arrow hides star backdrop (Right arrow to reverse)
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+
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+### Static video files
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+
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+If your projector can only show local video files (e.g SD card or disk on key), here are two minute long videos:
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+
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+* [enas.mp4](enas.mp4) — Default settings
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+* [enas180.mp4](enas180.mp4) — Names rotated 180-degrees (for projection from above).
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+

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each-name-a-star.html View File 

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+
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+<!DOCTYPE html>
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+<html lang="he" dir="rtl">
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+
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+<head>
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+    <meta charset="utf-8" />
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+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
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+    <title>כל שם כוכב</title>
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+    <!-- Google fonts-->
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+    <link rel="preconnect" href="https://fonts.googleapis.com">
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+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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+    <link href="https://fonts.googleapis.com/css2?family=Alef:wght@700&display=swap" rel="stylesheet">
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+    <style>
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+    body {
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+        font-family: Alef;
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+        font-size: 3rem;
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+        color: white;
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+        background-color: black;
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+        background-image: url('starfield.png');
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+        background-size: cover;
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+    }
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+    .name {
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+        position: fixed;
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+    }
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+    </style>
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+</head>
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+<body>
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+
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+<script src="https://code.jquery.com/jquery-3.7.1.js" integrity="sha256-eKhayi8LEQwp4NKxN+CfCh+3qOVUtJn3QNZ0TciWLP4=" crossorigin="anonymous"></script>
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+<script>
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+var CYCLE_MILLIS = 50;
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+var P_TWINKLE = 0.23;
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+var DECAY_FACTOR = 0.023;
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+var CUTOFF_LEVEL = 0.1;
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+
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+function cycle() {
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+    if (Math.random()<P_TWINKLE) {
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+        $($(".name")[Math.floor(Math.random()*N)]).css("opacity", 1);
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+    }
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+    $(".name").each(function(index) {
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+        var op = Number($(this).css("opacity"))*(1.0-DECAY_FACTOR);
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+        $(this).css("opacity", op>CUTOFF_LEVEL? op: 0);
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+    });
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+}
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+
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+var names = [
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+    "Anucha",
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+    "Gong",
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+    "Komkrit",
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+    "Manee",
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+    "Natthaporn",
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+    "Owat",
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+    "Pattanayuth",
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+    "אביב",
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+    "אביב",
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+    "אביבה",
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+    "אביגיל",
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+    "אבינתן",
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+    "אביתר",
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+    "אברהם",
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+    "אגם",
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+    "אגם",
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+    "אהד",
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+    "אוהד",
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+    "אוהד",
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+    "אופיר",
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+    "אופיר",
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+    "אופליה",
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+    "אור",
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+    "אור",
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+    "אורי",
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+    "אוריאל",
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+    "אוריה",
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+    "אוריון",
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+    "אורן",
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+    "איוון",
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+    "אילן",
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+    "אילנה",
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+    "אירנה",
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+    "איתי",
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+    "איתי",
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+    "איתי",
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+    "איתן",
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+    "איתן",
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+    "איתן",
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+    "איתן",
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+    "אלה",
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+    "אלון",
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+    "אלון",
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+    "אלי",
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+    "אליה",
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+    "אליה",
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+    "אליהו",
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+    "אליקים",
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+    "אלכס",
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+    "אלכסנדר",
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+    "אלמה",
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+    "אלמוג",
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+    "אלמוג",
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+    "אלעד",
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+    "אלקנה",
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+    "אמה",
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+    "אמילי",
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+    "אמיליה",
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+    "אנדריי",
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+    "אפרת",
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+    "ארבל",
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+    "ארז",
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+    "אריאל",
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+    "אריאל",
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+    "אריה",
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+    "בלאל",
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+    "בר",
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+    "גבריאלה",
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+    "גד",
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+    "גד",
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+    "ג'ודי",
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+    "ג'ושוע",
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+    "ג'ושי",
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+    "גיא",
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+    "גיא",
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+    "ג'ימי",
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+    "גל",
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+    "גלי",
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+    "דוד",
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+    "דוד",
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+    "דולב",
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+    "דורון",
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+    "דורון",
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+    "דיצה",
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+    "דניאל",
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+    "דניאל",
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+    "דניאל",
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+    "דפנה",
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+    "דפנה",
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+    "דרור",
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+    "דרור",
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+    "הגר",
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+    "הילה",
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+    "הירש",
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+    "ויויאן",
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+    "זיו",
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+    "חיים",
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+    "חמזה",
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+    "חן",
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+    "חנה",
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+    "חנה",
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+    "חנן",
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+    "טל",
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+    "טל",
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+    "טל",
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+    "טל",
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+    "יאיר",
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+    "יאיר",
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+    "יגב",
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+    "יגיל",
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+    "יהודית",
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+    "יהל",
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+    "יובל",
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+    "יובל",
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+    "יולי",
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+    "יונתן",
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+    "יוסוף",
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+    "יוסף",
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+    "יוסף",
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+    "יורם",
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+    "יותם",
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+    "ילנה",
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+    "יפה",
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+    "יצחק",
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+    "יצחק",
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+    "ירדן",
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+    "ירדן",
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+    "כפיר",
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+    "כרמל",
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+    "לואיס",
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+    "ליאור",
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+    "ליאם",
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+    "ליאת",
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+    "לירי",
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+    "מורן",
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+    "מיה",
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+    "מיה",
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+    "מייה",
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+    "מייה",
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+    "מיקה",
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+    "מירב",
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+    "מישל",
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+    "מקסים",
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+    "מרגלית",
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+    "מתן",
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+    "מתן",
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+    "נדב",
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+    "נוגה",
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+    "נווה",
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+    "נועה",
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+    "נועה",
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+    "נועם",
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+    "נורלין",
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+    "נילי",
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+    "ניק",
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+    "נמרוד",
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+    "נעם",
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+    "נעמה",
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+    "סאמר",
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+    "סהר",
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+    "סהר",
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+    "סוג'יט",
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+    "ספיר",
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+    "סשה",
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+    "עאישה",
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+    "עדה",
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+    "עדי",
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+    "עדינה",
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+    "עדן",
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+    "עדן",
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+    "עודד",
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+    "עומר",
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+    "עומר",
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+    "עומר",
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+    "עומרי",
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+    "עופר",
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+    "עידן",
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+    "עידן",
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+    "עלמה",
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+    "עמירם",
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+    "עמית",
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+    "עמית",
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+    "עמית",
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+    "ענבר",
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+    "עפרה",
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+    "עפרי",
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+    "פאצ'קו",
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+    "פרננדו",
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+    "צחי",
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+    "קאיד",
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+    "קיריל",
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+    "קית",
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+    "קלמנס",
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+    "קלרה",
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+    "קרינה",
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+    "קרינה",
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+    "קרן",
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+    "רביד",
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+    "רום",
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+    "רומי",
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+    "רון",
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+    "רון",
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+    "רון",
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+    "רוני",
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+    "רונן",
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+    "רותי",
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+    "רז",
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+    "רז",
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+    "רימון",
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+    "רן",
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+    "רעיה",
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+    "שגב",
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+    "שגיא",
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+    "שושן",
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+    "שירי",
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+    "שירי",
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+    "שלומי",
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+    "שלמה",
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+    "שני",
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+    "שני",
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+    "שקד",
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+    "שרון",
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+    "שרון",
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+    "תומר",
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+    "תמיר",
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+    "תמיר",
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+    "תמר"
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+];
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+var N = names.length;
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+$(() => {
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+    for (i=0; i<N; i++) {
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+        var div = $("<div/>").addClass("name").text(names[i]).css("opacity",0);
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+        var yoffset = 50-Math.round(Math.random()*50.0*0.98);
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+        var xoffset = Math.round(50.0-(Math.random()*50.0*0.7*Math.sin(Math.PI*0.5*(yoffset/50.0))));
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+        // *(9.0/16.0)
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+        if (Math.random()<0.5) {
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+            div.css("left", xoffset.toString()+"vw");
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+        } else {
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+            div.css("right", xoffset.toString()+"vw");
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+        }
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+        if (Math.random()<0.5) {
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+            div.css("top", yoffset.toString()+"vh");
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+        } else {
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+            div.css("bottom", yoffset.toString()+"vh");
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+        }
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+        $("body").append(div);
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+    }
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+    window.addEventListener('keydown', (event) => {
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+        console.log(event.key);
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+        if (event.key==="ArrowDown") {
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+            $('.name').css("rotate", "180deg");
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+        } else if (event.key==="ArrowUp") {
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+            $('.name').css("rotate", "0deg");
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+        } else if (event.key==="ArrowLeft") {
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+            $('body').css("background-image", "none");
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+        } else if (event.key==="ArrowRight") {
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+            $('body').css("background-image", "url('starfield.png')").css("background-size", "cover");
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+        }
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+    });
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+    setInterval(cycle, CYCLE_MILLIS);
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+});
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+</script>
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+</body>

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neopixel-twinkle/neopixel-twinkle.ino View File 

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+// Twinkling neopixel led strip. Used for "Each name a star"
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+// installation at hostage release vigils 2023
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+// by Roaring Silence https://shtika2023.org
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+
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+// * Connect strip to pin 6, gnd, and +5V
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+// * Set LED_COUNT according to your strip's LED counts
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+// * You might need to change NEO_* arguments to fit your hardware
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+
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+// NEOPIXEL BEST PRACTICES for most reliable operation:
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+// - Add 1000 uF CAPACITOR between NeoPixel strip's + and - connections.
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+// - MINIMIZE WIRING LENGTH between microcontroller board and first pixel.
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+// - NeoPixel strip's DATA-IN should pass through a 300-500 OHM RESISTOR.
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+// - AVOID connecting NeoPixels on a LIVE CIRCUIT. If you must, ALWAYS
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+//   connect GROUND (-) first, then +, then data.
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+// - When using a 3.3V microcontroller with a 5V-powered NeoPixel strip,
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+//   a LOGIC-LEVEL CONVERTER on the data line is STRONGLY RECOMMENDED.
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+// (Skipping these may work OK on your workbench but can fail in the field)
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+
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+#include <Adafruit_NeoPixel.h>
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+#ifdef __AVR__
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+#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
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+#endif
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+
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+// Which pin on the Arduino is connected to the NeoPixels?
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+// On a Trinket or Gemma we suggest changing this to 1:
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+#define LED_PIN    6
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+
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+// How many NeoPixels are attached to the Arduino?
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+#define LED_COUNT 55
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+
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+// Declare our NeoPixel strip object:
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+Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_RGB + NEO_KHZ800);
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+// Argument 1 = Number of pixels in NeoPixel strip
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+// Argument 2 = Arduino pin number (most are valid)
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+// Argument 3 = Pixel type flags, add together as needed:
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+//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
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+//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
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+//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
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+//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
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+//   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
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+
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+#define P_TWINKLE 0.15
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+#define DECAY_FACTOR 0.023
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+#define CUTOFF_LEVEL 0.1
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+#define R_FACTOR 191
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+#define G_FACTOR 127
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+#define B_FACTOR 31
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+
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+#define CYCLE_MILLIS 23
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+#define MIN_INITIAL 0.75
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+#define MAX_INITIAL 1.0
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+
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+#define FRAND(minval, maxval) (random(minval*1000, maxval*1000)/1000.0)
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+
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+float levels[LED_COUNT] = { 0.0 };
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+
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+
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+// setup() function -- runs once at startup --------------------------------
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+
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+void setup() {
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+  // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
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+  // Any other board, you can remove this part (but no harm leaving it):
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+#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
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+  clock_prescale_set(clock_div_1);
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+#endif
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+  // END of Trinket-specific code.
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+
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+  strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
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+  strip.show();            // Turn OFF all pixels ASAP
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+  strip.setBrightness(191); // Set BRIGHTNESS to about 1/5 (max = 255)
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+}
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+
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+
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+// loop() function -- runs repeatedly as long as board is on ---------------
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+
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+void loop() {
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+  if (FRAND(0.0, 1.1) < P_TWINKLE) {
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+    levels[random(0, LED_COUNT)] = FRAND(MIN_INITIAL, MAX_INITIAL);
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+
80 
+  }
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+  for (int i = 0; i < LED_COUNT; i++) { // For each pixel in strip...
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+    levels[i] *= (1 - DECAY_FACTOR);
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+    if (levels[i] < CUTOFF_LEVEL) {
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+      levels[i] = 0.0;
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+    }
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+    strip.setPixelColor(i, strip.Color(R_FACTOR * levels[i], G_FACTOR * levels[i], B_FACTOR * levels[i]));   //  Set pixel's color (in RAM)
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+  }
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+  strip.show();                          //  Update strip to match
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+  delay(CYCLE_MILLIS);                           //  Pause for a moment
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+}

BIN
starfield.png View File


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