fix belt support fill and support perimeter speed

release.md

@@ -3,7 +3,7 @@
 Full docs @ https://docs.grid.space/projects/kiri-moto
 
 
-# Release 3.9 (2023-03-11)
+# Release 3.9 (2023-03-12)
 
 * more graceful handling of security contexts blocking SharedArrayBuffer
 * FDM refactor the 'detect' support feature for auto-placing manual supports
@@ -19,6 +19,8 @@ Full docs @ https://docs.grid.space/projects/kiri-moto
 * CAM add lathe worker parallelization (2x - 6x speedup)
 - add "common" overrides in ops (z top/bottom/thru, direction)
 - fix lathe yellow path in normal (not dark) mode
+- fix pocket/trace selection with flip op
+- fix supports in belt mode
 
 
 # Release 3.8 (2023-01-21)

src/kiri-mode/fdm/prepare.js

@@ -790,7 +790,7 @@ function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
         originCenter = process.outputOriginCenter || bedRound,
         extruder = slice.extruder || 0,
         nozzleSize = process.sliceLineWidth || device.extruders[extruder].extNozzle,
-        firstLayer = opt.first || false,
+        firstLayer = (opt.first || false) && !opt.support,
         thinWall = nozzleSize * (opt.thinWall || 1.75),
         retractDist = opt.retractOver || 2,
         fillMult = opt.mult || process.outputFillMult,

src/kiri-mode/fdm/slice.js

@@ -831,7 +831,8 @@ FDM.slice = function(settings, widget, onupdate, ondone) {
         }
 
         // fill all supports (auto and manual)
-        if (!isBelt && supportDensity) {
+        // if (!isBelt && supportDensity) {
+        if (supportDensity) {
             profileStart("support-fill");
             let promises = false && isConcurrent ? [] : undefined;
             forSlices(0.8, promises ? 0.88 : 0.9, slice => {