add ease down angle setting in UI triggered when ease down enabled

src/geo/polygon.js

@@ -1141,9 +1141,9 @@ class Polygon {
      * 1. Travel from fromPoint to closest point on polygon, to rampZ above that that point,
      * 2. ease-down starts, following the polygonal path, decreasing Z at a fixed slope until target Z is hit,
      * 3. then the rest of the path is completed and repeated at target Z until touchdown point is reached.
-     *
+     * 4. this function should probably move to CAM prepare since it's only called from there
      */
-    forEachPointEaseDown(fn, fromPoint) {
+    forEachPointEaseDown(fn, fromPoint, degrees = 45) {
         let index = this.findClosestPointTo(fromPoint).index,
             fromZ = fromPoint.z,
             offset = 0,
@@ -1156,10 +1156,6 @@ class Polygon {
             next,
             done;
 
-        // XXX: These should be UI configurable options.
-
-        // "Slope" of the ease-down path in degrees, or an approximation thereof.
-        const degrees = 1;
         // Slope for computations.
         const slope = Math.tan((degrees * Math.PI) / 180);
         // Z height above polygon Z from which to start the ease-down.

src/kiri-mode/cam/prepare.js

@@ -88,6 +88,7 @@ function prepEach(widget, settings, print, firstPoint, update) {
         origin = newPoint(originx + wmx, originy + wmy, zmax),
         output = print.output,
         easeDown = process.camEaseDown,
+        easeAngle = process.camEaseAngle,
         depthFirst = process.camDepthFirst,
         engageFactor = process.camFullEngage,
         tolerance = 0,
@@ -581,7 +582,7 @@ function prepEach(widget, settings, print, firstPoint, update) {
         if (easeDown && poly.isClosed()) {
             last = poly.forEachPointEaseDown(function(point, offset) {
                 camOut(point.clone(), offset > 0, undefined, scale);
-            }, fromPoint);
+            }, fromPoint, easeAngle);
         } else {
             poly.forEachPoint(function(point, pidx, points, offset) {
                 last = point;

src/kiri/conf.js

@@ -569,6 +569,7 @@ const conf = exports({
                 camTabsMidline: false,
                 camDepthFirst: false,
                 camEaseDown: false,
+                camEaseAngle: 10,
                 camOriginTop: true,
                 camZAnchor: "middle",
                 camZOffset: 0,

src/kiri/init.js

@@ -1957,6 +1957,7 @@ gapp.register("kiri.init", [], (root, exports) => {
             camFirstZMax:        newBoolean(LANG.ou_z1st_s, onBooleanClick, {title:LANG.ou_z1st_l}),
             camForceZMax:        newBoolean(LANG.ou_forz_s, onBooleanClick, {title:LANG.ou_forz_l}),
             separator:           newBlank({ class:"set-sep", driven }),
+            camEaseAngle:        newInput(LANG.ou_eang_s, {title:LANG.ou_eang_l, convert:toFloat, bound:bound(0.1,85), show:() => ui.camEaseDown.checked}),
             camFullEngage:       newInput(LANG.ou_feng_s, {title:LANG.ou_feng_l, convert:toFloat, bound:bound(0.1,1.0)}),
             _____:               newGroup(LANG.co_menu, $('cam-origin'), { modes:CAM, driven, separator }),
             camOriginTop:        newBoolean(LANG.or_topp_s, onBooleanClick, {title:LANG.or_topp_l}),

web/kiri/lang/en.js

@@ -738,6 +738,8 @@ self.kiri.lang['en-us'] = {
     ou_z1st_l:      "first move in the job will be to Z max (travel distance above stock)",
     ou_feng_s:      "engage factor",
     ou_feng_l:      "speed scale (0.1-1) when endmill is fully engaged on a new cut. stepped over cuts when the endmill is less than fully engaged run at a factor of 1 relative to output speed. typically this relates to roughing or any operation with step over.",
+    ou_eang_s:      "ease angle",
+    ou_eang_l:      "descent angle for ease down in degrees",
 
     // CAM STOCK
     cs_menu:        "stock",