integrated stereoview in regular viewser

[serve0] / static / stereoview.js

diff --git a/static/stereoview.js b/static/stereoview.js
new file mode 100755 (executable)
index 0000000..b2eac9a
--- /dev/null
+++ b/static/stereoview.js
@@ -0,0 +1,84 @@
+/*  Copyright 2018 Paul Hänsch
+   
+    This file is part of Serve0
+    
+    Serve0 is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+    
+    Serve0 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+    
+    You should have received a copy of the GNU Affero General Public License
+    along with Serve0  If not, see <http://www.gnu.org/licenses/>. 
+*/
+
+var render, video;
+var x, y = [], z = [], ox = 0, cnt = 0, ty, tz;
+var scale, lv, rv, debug;
+var w, h, scale;
+
+function draw() {
+  ty = 0; y.forEach( function(n, i){ ty += n;} ); ty /= 6;
+  tz = 0; z.forEach( function(n, i){ tz += n;} ); tz /= 6;
+  v = tz / 9.81 / 2;
+  r = ty / 9.81 * -90;
+  ox = ox + ty * 2;
+
+  if ( layout == "180" ) {
+    if      (ox > w / 8)   { ox = w / 8; } else if (ox < w / -8) { ox = w / -8; }
+    sy = ( v * h + h / 4) |0;
+    lc.drawImage(video, (w / 8     + ox) % (w/2) |0, sy, w / 4 |0, h / 2, 0, 0, lv.width, h / 2 * scale);
+    rc.drawImage(video, (w / 8 * 5 + ox) % (w/2) |0, sy, w / 4 |0, h / 2, 0, 0, rv.width, h / 2 * scale);
+  } else {
+    sx = (w / 8 * 3 + ox) % (w) |0;
+    lc.drawImage(video, sx, (v * h + h / 8)     |0, w / 4 |0, h / 2, 0, 0, lv.width, h / 2 * scale);
+    rc.drawImage(video, sx, (v * h + h / 8 * 5) |0, w / 4 |0, h / 2, 0, 0, rv.width, h / 2 * scale);
+    if (sx < 0) {
+      lc.drawImage(video, sx + w, (v * h + h / 8)     |0, w / 4 |0, h / 2, 0, 0, lv.width, h / 2 * scale);
+      rc.drawImage(video, sx + w, (v * h + h / 8 * 5) |0, w / 4 |0, h / 2, 0, 0, rv.width, h / 2 * scale);
+    } else if ( sx + w / 4 > w) {
+      lc.drawImage(video, sx - w, (v * h + h / 8)     |0, w / 4 |0, h / 2, 0, 0, lv.width, h / 2 * scale);
+      rc.drawImage(video, sx - w, (v * h + h / 8 * 5) |0, w / 4 |0, h / 2, 0, 0, rv.width, h / 2 * scale);
+    }
+  }
+
+  lv.style.transform = "rotate(" + r + "deg)"
+  rv.style.transform = "rotate(" + r + "deg)"
+
+  requestAnimationFrame(draw);
+};
+
+function stereoview(layout, video) {
+  this.layout = layout; this.video = video;
+  document.body.appendChild( lv = document.createElement("canvas") );
+  document.body.appendChild( rv = document.createElement("canvas") );
+  // debug = document.getElementById("debug");
+  
+  lv.setAttribute( "style", "position: fixed; top: 0; left:  0 ; width: 50%; height: 100%; z-index: 100;");
+  rv.setAttribute( "style", "position: fixed; top: 0; left: 50%; width: 50%; height: 100%; z-index: 100;");
+
+  lv.setAttribute( "width", "" + lv.offsetWidth);
+  rv.setAttribute( "width", "" + rv.offsetWidth);
+  lv.setAttribute("height", "" + lv.offsetHeight);
+  rv.setAttribute("height", "" + rv.offsetHeight);
+  
+  lc = lv.getContext("2d");
+  rc = rv.getContext("2d");
+  
+  window.addEventListener("devicemotion", function(event) {
+    // x[cnt] = event.accelerationIncludingGravity.x;
+    y[cnt] = event.accelerationIncludingGravity.y;
+    z[cnt] = event.accelerationIncludingGravity.z;
+    cnt = (cnt + 1) % 6;
+  }, true);
+
+  w = video.videoWidth; h = video.videoHeight;
+  scale = lv.width / (w / 4); 
+  video.play();
+  // video.setAttribute("style", "display: none;");
+  draw();
+};