From bfe87bec8b99a8d61aeaad0ef1b73f93bc4dc79b Mon Sep 17 00:00:00 2001
From: julien delnatte <julien.delnatte@gmail.com>
Date: Sat, 29 Oct 2022 20:20:32 +0200
Subject: [PATCH 1/3] add "random" and "position" sliceLayerStart and fix
 origin

---
 src/kiri-mode/fdm/prepare.js | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/kiri-mode/fdm/prepare.js b/src/kiri-mode/fdm/prepare.js
index ce7f54e4..abb6d3c4 100644
--- a/src/kiri-mode/fdm/prepare.js
+++ b/src/kiri-mode/fdm/prepare.js
@@ -784,9 +784,11 @@ FDM.prepare = async function(widgets, settings, update) {
 function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
     const { settings } = print;
     const { device } = settings;
+    const { bedWidth, bedDepth, bedRound } = device;
 
     let preout = [],
         process = opt.params || settings.process,
+        originCenter = process.outputOriginCenter || bedRound,
         extruder = slice.extruder || 0,
         nozzleSize = process.sliceLineWidth || device.extruders[extruder].extNozzle,
         firstLayer = opt.first || false,
@@ -810,6 +812,15 @@ function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
         antiBacklash = process.antiBacklash,
         wipeDist = process.outputRetractWipe || 0,
         isBelt = device.bedBelt,
+        bedOffset = originCenter ? {
+            x: 0,
+            y: 0,
+            z: 0
+        } : {
+            x: bedWidth/2,
+            y: isBelt ? 0 : bedDepth/2,
+            z: 0
+        },
         beltFirst = process.outputBeltFirst || false,
         startClone = startPoint.clone(),
         seedPoint = opt.seedPoint || startPoint,
@@ -1376,11 +1387,24 @@ function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
             switch (process.sliceLayerStart) {
                 case "last":
                     break;
+                case "random":
+                    let bounds = top.poly.bounds;
+                    let center = bounds.center();
+                    let radius = Math.max(bounds.width(), bounds.height());
+                    let angle = Math.random()*Math.PI*2;
+                    let x = center.x + Math.cos(angle)*radius;
+                    let y = center.y + Math.sin(angle)*radius;
+                    startPoint = newPoint(x,y,startPoint.z);
+                    break;
                 case "center":
                     startPoint = newPoint(0,0,startPoint.z);
                     break;
                 case "origin":
-                    startPoint = origin.clone();
+                    startPoint = newPoint(-bedOffset.x, -bedOffset.y, startPoint.z);
+                    break;
+                case "position":
+                    startPoint = newPoint(-bedOffset.x+process.sliceLayerStartX, -bedOffset.y+process.sliceLayerStartY, startPoint.z);
+                    console.log("startPoint", top);
                     break;
             }
 

From c414305bede5ff99f20c5cb6646780644ad824b2 Mon Sep 17 00:00:00 2001
From: julien delnatte <julien.delnatte@gmail.com>
Date: Sat, 29 Oct 2022 20:29:19 +0200
Subject: [PATCH 2/3] add "random" to choice lists

---
 src/kiri/consts.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/kiri/consts.js b/src/kiri/consts.js
index 9ca5e68e..eb73b0b6 100644
--- a/src/kiri/consts.js
+++ b/src/kiri/consts.js
@@ -29,6 +29,7 @@ const LISTS = {
         { name: "last" },
         { name: "center" },
         { name: "origin" },
+        { name: "random" },
     ],
     infill: [
         { name: "hex" },

From f324b2cf83a56395cbf20c88ac343f4cf7d3a727 Mon Sep 17 00:00:00 2001
From: julien delnatte <julien.delnatte@gmail.com>
Date: Sat, 29 Oct 2022 20:38:21 +0200
Subject: [PATCH 3/3] add sliceLayerStartX and sliceLayerStartY to conf.js

---
 src/kiri/conf.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/kiri/conf.js b/src/kiri/conf.js
index ef93dff6..ff3419d1 100644
--- a/src/kiri/conf.js
+++ b/src/kiri/conf.js
@@ -302,6 +302,8 @@ const conf = exports({
                 sliceShells: 3,
                 sliceShellOrder: "in-out",
                 sliceLayerStart: "last",
+                sliceLayerStartX: 0,
+                sliceLayerStartY: 0,
                 sliceLineWidth: 0,
                 sliceFillGrow: 0,
                 sliceFillAngle: 45,