introduce script to generate assembly animation. still needs cleanup

rack/assembly/propUpBottomXYTraywithSideWalls.scad

@@ -0,0 +1,32 @@
+include <./common.scad>
+use <./insertDowelsIntoSideWall.scad>
+use <./connectXYTrayWithMainRails.scad>
+
+$vpt = [96,110,70];
+$vpr = [68,0,36];
+$vpd = 700;
+$vpf = 22.50;
+
+propUpBottomXYTraywithSideWalls(at=$t, r=0);
+
+module propUpBottomXYTraywithSideWalls(at=0, r=0) {
+
+  t = lerp(a=10,b=0,t=at);
+
+  function sideWallToYBarTrans(t=0,r=0) =
+    yBarMirrorOtherCornerTrans *
+    yBarSideModuleConnectorTrans * // bring to y bar space
+    mirror(v=[0,1,0]) *
+    translate(v=[0,0,t]) *
+    translate(v=[sideWallConnW/2.0, -hingePoleR, sideWallZHingeTotalClearance]) * // bring to side module space
+    rotate(a=[0,0,-r]) *
+    translate(v=[-hingePoleDx, -hingePoleDy, 0]);
+
+  connectXYTrayWithMainRails(at=1);
+
+  multmatrix(sideWallToYBarTrans(t=t, r=r))
+    insertDowelsIntoSideWall(at=1);
+
+  multmatrix(xBarSpaceToYBarSpace * xBarMirrorOtherCornerTrans * yBarSpaceToXBarSpace * sideWallToYBarTrans(t=t,r=r))
+    insertDowelsIntoSideWall(at=1);
+}