further work on rack-mount refactor

rack-mount/tray/animate.scad

@@ -0,0 +1,20 @@
+include <../common.scad>
+use <./entry.scad>
+
+$vpt = [100,-42,36];
+$vpr = [70,0,27];
+$vpd = 445;
+$vpf = 22.50;
+
+animateTraySystem(at=$t);
+
+module animateTraySystem(at=$t) {
+
+  trayU = max(1, ceil(at*3));
+  x=100;
+  y=100;
+  dx = abs(lerp(a=-40, b=40, t=at));
+  dy = abs(lerp(a=-30, b=30, t=at));
+
+  traySystem(trayU=trayU, baseWidth=x+dx, baseDepth=y+dy, mountPoints=[]);
+}