From abbfd27b6b7f60e9e7ccaa13ee55c47cc82b6f49 Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Thu, 24 Jun 2021 12:39:47 -0400
Subject: [PATCH] a few simple SLA fixes

---
 src/mode/fdm/slice.js  | 4 ++--
 src/mode/sla/export.js | 4 ++--
 src/mode/sla/slice.js  | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/mode/fdm/slice.js b/src/mode/fdm/slice.js
index f321d5f5..3ca7d3a1 100644
--- a/src/mode/fdm/slice.js
+++ b/src/mode/fdm/slice.js
@@ -665,9 +665,9 @@
      * @param {number} fillOffset
      * @param {Obejct} options
      */
-    function doShells(slice, count, offsetN, fillOffset, opt = {}) {
+    function doShells(slice, count, offset1, offsetN, fillOffset, opt = {}) {
         for (let top of slice.tops) {
-            doTopShells(slice.z, top, count, offsetN / 2, offsetN, fillOffset, opt);
+            doTopShells(slice.z, top, count, offset1, offsetN, fillOffset, opt);
         }
     }
 
diff --git a/src/mode/sla/export.js b/src/mode/sla/export.js
index 61c9df24..026643ca 100644
--- a/src/mode/sla/export.js
+++ b/src/mode/sla/export.js
@@ -528,7 +528,7 @@
             let slice = widget.slices[index];
             if (slice) {
                 if (slice.synth) count++;
-                let polys = slice.solids.unioned;
+                let polys = slice.unioned;
                 if (!polys) polys = slice.tops.map(t => t.poly);
                 if (slice.supports) polys.appendAll(slice.supports);
                 array.appendAll(polys.map(poly => {
@@ -576,7 +576,7 @@
             if (slice) {
                 // prevent premature exit on empty synth slice
                 if (slice.synth) count++;
-                let polys = slice.solids.unioned;
+                let polys = slice.unioned;
                 if (!polys) polys = slice.tops.map(t => t.poly);
                 if (slice.supports) polys.appendAll(slice.supports);
                 polys.forEach(poly => {
diff --git a/src/mode/sla/slice.js b/src/mode/sla/slice.js
index d7c25379..003bef93 100644
--- a/src/mode/sla/slice.js
+++ b/src/mode/sla/slice.js
@@ -160,7 +160,7 @@
                     let trims = slice.solids || [];
                     traces.appendAll(trims);
                     let union = POLY.union(traces, undefined, true);
-                    slice.unioned = union;
+                    slice.unioned = POLY.setZ(union, slice.z);
                 }, "solid");
             } else {
                 forSlices(slices, 10, (slice) => {