fix z bottom for topo

notes.md

@@ -2,6 +2,7 @@
 
 NEXT
 - contour tabs support
+- flat render
 - path arrows
 - help dialog
 - full bug reports
@@ -9,9 +10,9 @@ NEXT
 
 ## `C` cosmetic, `F` functional, `P` performance, `B` bug fix
 
+* `F` 2D image import
 * `F` detect and report slow framerates
 * `F` implement an in-app bug reporting system. add workspace to export option.
-* `F` 2D image import
 * `P` improve decimation speed by avoiding in/out of Point?
 * `P` duplicate objects should share same slice data unless rotated or scaled
 * `P` worker state cache cleanup and organization

package.json

@@ -1,6 +1,6 @@
 {
     "name": "grid-apps",
-    "version": "2.3.D6",
+    "version": "2.3.D7",
     "description": "grid.space 3d slice & modeling tools",
     "author": "Stewart Allen <sa@grid.space>",
     "license": "MIT",

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: "2.3.D6"
+        VERSION: "2.3.D7"
     };
 
     if (typeof(module) === 'object') {

src/mode/cam/topo.js

@@ -36,6 +36,7 @@
                 minY = bounds.min.y,
                 maxY = bounds.max.y,
                 zBottom = proc.camZBottom,
+                zMin = Math.max(bounds.min.z, zBottom) + 0.0001,
                 boundsX = maxX - minX,
                 boundsY = maxY - minY,
                 maxangle = proc.camContourAngle,
@@ -86,17 +87,12 @@
                     let ty = profile[i++] + y;
                     let tz = profile[i++];
                     if (tx < 0 || tx > xl || ty < 0 || ty > yl) {
-                        // if outside max topo steps, use 0
-                        gv = 0;
+                        // if outside max topo steps, use zMin
+                        gv = zMin;
                     } else {
                         // lookup grid value @ tx, ty
-                        gv = topo.data[tx * sy + ty] || 0;
+                        gv = topo.data[tx * sy + ty] || zMin;
                     }
-                    // inside the topo but off the part
-                    // if (floormax && gv === 0) {
-                    //     // return topo.bounds.max.z;
-                    //     gv = topo.bounds.max.z;
-                    // }
                     // update the rest
                     mz = Math.max(tz + gv, mz);
                 }
@@ -142,7 +138,6 @@
                     gridy,
                     gridi, // index
                     gridv, // value
-                    zMin = Math.max(bounds.min.z, zBottom) + 0.0001,
                     x, y, tv, ltv;
 
                 // for each Y slice, find z grid value (x/z swapped)