add global slicePre similar to sliceAll (which should be renamed slicePost)

add shared cam operational state so index+stock can run once for all instances

src/kiri/app/function.js

@@ -137,6 +137,10 @@ function prepareSlices(callback, scale = 1, offset = 0) {
         client.rotate(settings);
     }
 
+    function sliceSetup() {
+        client.slicePre(settings, sliceNext);
+    }
+
     function sliceNext() {
         if (toSlice.length) {
             // while more widgets to slice
@@ -309,8 +313,9 @@ function prepareSlices(callback, scale = 1, offset = 0) {
         space.refresh();
     }
 
-    // kick off slicing chain
-    sliceNext();
+    // do any global setup / state management
+    // then kick off slicing chain
+    sliceSetup();
 }
 
 /**

src/kiri/app/workers.js

@@ -211,6 +211,13 @@ export const client = {
         });
     },
 
+
+    // called once at the beginning of slice operations
+    // setup any global shared state
+    slicePre(settings, callback) {
+        send("slicePre", { settings }, callback);
+    },
+
     // called once for each widget
     slice(settings, widget, callback) {
         send("slice", {

src/kiri/mode/cam/driver-be.js

@@ -1,7 +1,7 @@
 /** Copyright Stewart Allen <sa@grid.space> -- All Rights Reserved */
 
 import { codec } from '../../core/codec.js';
-import { cam_slice, holes, traces } from './slice.js';
+import { cam_slice_pre, cam_slice, holes, traces } from './slice.js';
 import { cam_prepare } from './prepare.js';
 import { cam_export } from './export.js';
 import { tool as mesh_tool } from '../../../mesh/tool.js';
@@ -114,6 +114,7 @@ export const CAM = {
     init,
     surface_prep,
     surface_find,
+    slicePre: cam_slice_pre,
     slice: cam_slice,
     prepare: cam_prepare,
     export: cam_export

src/kiri/mode/cam/op-level.js

@@ -14,9 +14,11 @@ class OpLevel extends CamOp {
 
     async slice(progress) {
         let { op, state } = this;
-        let { addSlices, color, settings, shadow, updateToolDiams, zMax, ztOff } = state;
+        let { addSlices, color, settings, shadow } = state;
+        let { share, updateToolDiams, zMax, ztOff } = state;
         let { down, tool, step, stepz, inset } = op;
         let { stock } = settings;
+        let { center } = stock;
 
         let toolDiam = new Tool(settings, tool).fluteDiameter();
         let stepOver = this.stepOver = toolDiam * step;
@@ -25,11 +27,23 @@ class OpLevel extends CamOp {
         let zBot = zTop - down;
         let zList = stepz && down ? util.lerp(zTop, zBot, stepz) : [ zBot ];
 
+        if (share.ran) {
+            console.log('skip');
+            this.skip = true;
+            return;
+        } else if (op.stock) {
+            share.ran = true;
+        }
+
         updateToolDiams(toolDiam);
 
         let points = [];
         let clear = op.stock ?
-            [ newPolygon().centerRectangle({x:-wpos.x,y:-wpos.y,z:wpos.z}, stock.x + toolDiam/2, stock.y) ] :
+            [ newPolygon().centerRectangle({
+                x: -wpos.x + center.x,
+                y: -wpos.y + center.y,
+                z:  wpos.z + center.z
+            }, stock.x + toolDiam/2, stock.y) ] :
             POLY.outer(POLY.offset(shadow.base, toolDiam * (inset || 0)));
 
         POLY.fillArea(clear, 1090, stepOver, points);
@@ -50,10 +64,14 @@ class OpLevel extends CamOp {
     }
 
     prepare(ops, progress) {
-        let { layers, stepOver } = this;
+        let { layers, skip, stepOver } = this;
         let { printPoint } = ops;
         let { newLayer, tip2tipEmit, camOut } = ops;
 
+        if (skip) {
+            return;
+        }
+
         for (let lines of layers) {
             lines = lines.map(p => { return { first: p.first(), last: p.last(), poly: p } });
             printPoint = tip2tipEmit(lines, printPoint, (el, point, count) => {

src/kiri/mode/cam/slice.js

@@ -11,6 +11,13 @@ import { Slicer as cam_slicer } from './slicer_cam.js';
 import { Tool } from './tool.js';
 import { util } from '../../../geo/base.js';
 
+// state shared across all widget slicing
+let shared;
+
+export function cam_slice_pre(settings) {
+    shared = { ops: { } };
+}
+
 /**
  * DRIVER SLICE CONTRACT
  *
@@ -306,7 +313,7 @@ export async function cam_slice(settings, widget, onupdate, ondone) {
     }
 
     if (false) {
-        opList.push(new OPS.xray(state, { type: "xray" }));
+        opList.push({ op: new OPS.xray(state, { type: "xray" }) });
     }
 
     // find index ops
@@ -315,14 +322,14 @@ export async function cam_slice(settings, widget, onupdate, ondone) {
     if (isIndexed) {
         // preface op list with OpIndex
         if (activeOps.length === 0 || activeOps[0].type !== 'index') {
-            opList.push(new OPS.index(state, { type: "index", degrees: 0, absolute: true }));
-            opTot += opList.peek().weight();
+            opList.push({ op: new OPS.index(state, { type: "index", degrees: 0, absolute: true }) });
+            opTot += opList.peek().op.weight();
 
         }
     } else {
         // preface op list with OpShadow
-        opList.push(new OPS.shadow(state, { type: "shadow", silent: true }));
-        opTot += opList.peek().weight();
+        opList.push({ op: new OPS.shadow(state, { type: "shadow", silent: true }) });
+        opTot += opList.peek().op.weight();
     }
 
     // LOOP EXPANSION - duplicate next N operations M times
@@ -354,6 +361,7 @@ export async function cam_slice(settings, widget, onupdate, ondone) {
     activeOps = expandedOps;
 
     // determine # of steps and step weighting for progress bar
+    let opos = 0;
     for (let op of activeOps) {
         if (op.type === '|') {
             break;
@@ -361,15 +369,20 @@ export async function cam_slice(settings, widget, onupdate, ondone) {
         let opfn = OPS[op.type];
         if (opfn) {
             let opin = new opfn(state, op);
-            opList.push(opin);
             opTot += opin.weight();
+            opos++;
+            let share = shared.ops[opos];
+            if (!share) {
+                share = shared.ops[opos] =  {};
+            }
+            opList.push({ op: opin, share });
         }
     }
 
     // call slice() function on all ops in order
     await setAxisIndex();
     updateSlicer();
-    for (let op of opList) {
+    for (let { op, share } of opList) {
         let weight = op.weight();
         // apply operation override vars
         let workover = var_compute();
@@ -392,6 +405,7 @@ export async function cam_slice(settings, widget, onupdate, ondone) {
         let layername = named.length ? named : (note ? `${type} (${note})` : type);
         Object.assign(state, {
             layername,
+            share,
             stock,
             tool,
             zBottom,

src/kiri/run/worker.js

@@ -420,6 +420,18 @@ const dispatch = {
         send.done({});
     },
 
+    slicePre(data, send) {
+        const { settings } = data;
+        const { mode } = settings;
+        const driver = drivers[mode];
+
+        if (driver.slicePre) {
+            driver.slicePre(settings);
+        }
+
+        send.done();
+    },
+
     slice(data, send) {
         send.data({ update:0.001, updateStatus:"slicing" });