bump rev 2.9.D8 -- default y belt offset to 1/2 layer height

package.json

@@ -1,6 +1,6 @@
 {
     "name": "grid-apps",
-    "version": "2.9.7D",
+    "version": "2.9.8D",
     "description": "grid.space 3d slice & modeling tools",
     "author": "Stewart Allen <sa@grid.space>",
     "license": "MIT",

src/kiri.js

@@ -6,7 +6,7 @@
 
     if (!self.kiri) {
         self.kiri = {
-            beta: 2907,
+            beta: 2908,
             driver: {}, // driver modules
             loader: []  // module loading: array of functions
         };

src/license.js

@@ -3,7 +3,7 @@
     let terms = {
         COPYRIGHT: "Copyright (C) Stewart Allen <sa@grid.space> - All Rights Reserved",
         LICENSE: "See the license.md file included with the source distribution",
-        VERSION: "2.9.D7"
+        VERSION: "2.9.D8"
     };
 
     if (typeof(module) === 'object') {

src/mode/fdm/export.js

@@ -55,7 +55,7 @@
             blast = 0,
             blastz = 0,
             process = settings.process,
-            belt_add_y = process.firstLayerYOffset || 0,
+            belt_add_y = (process.firstLayerYOffset || 0) - (print.belty || 0),
             loops = process.outputLoops || 0,
             zhop = process.zHopDistance || 0, // range
             seekMMM = process.outputSeekrate * 60,

src/mode/fdm/prepare.js

@@ -468,6 +468,8 @@
                     thresh = Math.min(thresh, point.z - point.y);
                 }
             }
+            // store this offset to be removed from Y values in export
+            print.belty = thresh;
             thresh = thresh + firstLayerHeight * 0.25;
             // iterate over layers, find extrusion on belt and
             // apply corrections and add brim when specified