add roughing flat passes option

src/kiri/core/conf.js

@@ -565,6 +565,7 @@ export const conf = {
                 camRegisterThru: 5,
                 camRoughAll: true,
                 camRoughDown: 2,
+                camRoughFlat: false,
                 camRoughIn: true,
                 camRoughOmitThru: false,
                 camRoughOmitVoid: false,

src/kiri/mode/cam/cl-ops.js

@@ -227,6 +227,7 @@ export function createPopOps() {
         leave: 'camRoughStock',
         leavez: 'camRoughStockZ',
         all: 'camRoughAll',
+        flats: 'camRoughFlat',
         inside: 'camRoughIn',
         omitthru: 'camRoughOmitThru',
         ov_topz: 0,
@@ -246,6 +247,7 @@ export function createPopOps() {
         sep: UC.newBlank({ class: "pop-sep" }),
         all: UC.newBoolean(LANG.cr_clst_s, undefined, { title: LANG.cr_clst_l, show: () => !env.poppedRec.inside || env.poppedRec.all }),
         inside: UC.newBoolean(LANG.cr_olin_s, undefined, { title: LANG.cr_olin_l, show: () => !env.poppedRec.all || env.poppedRec.inside }),
+        flats: UC.newBoolean(LANG.cr_clrf_s, undefined, { title: LANG.cr_clrf_l }),
         omitthru: UC.newBoolean(LANG.co_omit_s, undefined, { title: LANG.co_omit_l }),
         sep: UC.newBlank({ class: "pop-sep" }),
         exp: UC.newExpand("overrides"),

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

@@ -28,7 +28,8 @@ class OpArea extends CamOp {
 
     async slice(progress) {
         let { op, state } = this;
-        let { direction, down, expand, follow, mode, outline, over, rename, smooth, tool } = op;
+        let { direction, down, expand, flats, flatOff, follow } = op;
+        let { mode, outline, over, rename, smooth, tool } = op;
         let { addSlices, color, cutTabs, settings } = state;
         let { shadowAt, setToolDiam, tabs, widget, workarea } = state;
 
@@ -129,7 +130,10 @@ class OpArea extends CamOp {
             newArea();
 
             if (mode === 'clear') {
-                let zs = down ? base_util.lerp(zTop, zBottom, down) : [ bounds.min.z ];
+                let zMov = flatOff ?? 0;
+                let zs = flats ?
+                    flats.filter(z => z <= zTop && z >= zBottom).map(v => v + zMov ?? 0) :
+                    down ? base_util.lerp(zTop, zBottom, down) : [ bounds.min.z ];
                 let zroc = 0;
                 let zinc = 1 / zs.length;
                 let lzo;
@@ -152,7 +156,7 @@ class OpArea extends CamOp {
                     let firstOff = -(toolDiam / 2 + (op.leave_xy ?? 0));
                     POLY.subtract([ area ], shadow, clip, undefined, undefined, 0);
                     POLY.offset(clip, [ firstOff, -toolOver ], {
-                        count: op.steps ?? 999, outs, flat: true, z, minArea: 0
+                        count: op.steps ?? 999, outs, flat: true, z: z - zMov, minArea: 0
                     });
                     // if we see no offsets, re-check the mesh bottom Z then exit
                     if (outs.length === 0) {

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

@@ -14,10 +14,8 @@ class OpRough extends CamOp {
 
     async slice(progress) {
         let { op, state } = this;
-        let { shadow, stock, tool, widget } = state;
+        let { newSlicer, shadow, stock, tool, widget } = state;
-        let { workarea } = state;
 
-        let cutThruBypass = op.down > workarea.top_stock - workarea.bottom_part;
         let cutOutside = !op.inside;
         let shadowBase = shadow.base;
 
@@ -54,9 +52,36 @@ class OpRough extends CamOp {
             surfaces: {}
         }));
 
+        if (op.flats) {
+            let slicer = newSlicer();
+            ops_list.push(new OpArea(state, {
+                rename: op.rename ?? "flats",
+                spindle: op.spindle,
+                direction: op.direction,
+                tool: op.tool,
+                rate: op.rate,
+                plunge: op.plunge,
+                mode: 'clear',
+                over: op.step,
+                down: op.down,
+                expand: 0,
+                smooth: 0,
+                outline: true,
+                omitthru: op.omitthru,
+                leave_xy: op.leave,
+                leave_z: op.leavez,
+                ov_botz: op.ov_botz,
+                ov_topz: op.ov_topz,
+                areas: { [widget.id]: areas.map(p => p.toArray()) },
+                surfaces: {},
+                flats: Object.keys(slicer.zFlat).map(v => parseFloat(v)).sort((a,b) => b-a),
+                flatOff: 0.01
+            }));
+        }
+
         if (cutOutside) {
             ops_list.push(new OpArea(state, {
-                rename: op.rename ?? "rough",
+                rename: op.rename ?? "cutout",
                 spindle: op.spindle,
                 direction: op.direction === 'climb' ? 'conventional' : 'climb',
                 tool: op.tool,

src/kiri/mode/cam/slice.js

@@ -173,6 +173,7 @@ export async function cam_slice(settings, widget, onupdate, ondone) {
         cutTabs,
         dark,
         isIndexed,
+        newSlicer,
         ops: opList,
         setAxisIndex,
         setToolDiam,
@@ -218,8 +219,12 @@ export async function cam_slice(settings, widget, onupdate, ondone) {
         }
     }
 
-    function updateSlicer() {
+    function newSlicer(opts) {
-        slicer = state.slicer = new cam_slicer(widget);
+        return new cam_slicer(widget, opts);
+    }
+
+    function updateSlicer(opts) {
+        return slicer = state.slicer = new cam_slicer(widget, opts);
     }
 
     async function computeShadows() {

web/kiri/lang/en.js

@@ -544,6 +544,8 @@ self.lang['en-us'] = {
     cr_clrt_l:      ["run a clearing pass over","the bounding area of the part","at z = 0"],
     cr_olin_s:      "inside only",
     cr_olin_l:      ["limit cutting to","inside part boundaries"],
+    cr_clrf_s:      "clear faces",
+    cr_clrf_l:      ["add additional clearing passes","for detected z planar flat areas"],
 
     // CNC OUTLINE
     co_menu:        "outline",