From e810285486808d569dbefcb3224b7a3bc7128057 Mon Sep 17 00:00:00 2001
From: marko <marko.kl.berkenbusch@gmail.com>
Date: Thu, 13 Aug 2020 13:54:33 -0400
Subject: [PATCH 1/9] Fix author

---
 apps.json                             |  17 +-
 apps/viewstl/cube.stl                 |  86 +++
 apps/viewstl/fish_s.stl               | 756 ++++++++++++++++++++++++++
 apps/viewstl/icons8-octahedron-48.png | Bin 0 -> 1107 bytes
 apps/viewstl/icosa.stl                | 142 +++++
 apps/viewstl/tetra.stl                |  30 +
 apps/viewstl/toilet_s.stl             | 516 ++++++++++++++++++
 apps/viewstl/viewstl-icon.js          |   1 +
 apps/viewstl/viewstl.app.js           | 422 ++++++++++++++
 apps/viewstl/viewstl.min.js           | 272 +++++++++
 10 files changed, 2241 insertions(+), 1 deletion(-)
 create mode 100644 apps/viewstl/cube.stl
 create mode 100644 apps/viewstl/fish_s.stl
 create mode 100644 apps/viewstl/icons8-octahedron-48.png
 create mode 100644 apps/viewstl/icosa.stl
 create mode 100644 apps/viewstl/tetra.stl
 create mode 100644 apps/viewstl/toilet_s.stl
 create mode 100644 apps/viewstl/viewstl-icon.js
 create mode 100644 apps/viewstl/viewstl.app.js
 create mode 100644 apps/viewstl/viewstl.min.js

diff --git a/apps.json b/apps.json
index b5584b55c..6495883c1 100644
--- a/apps.json
+++ b/apps.json
@@ -2142,5 +2142,20 @@
     {"name": "counter.app.js", "url": "counter.js"},
     {"name": "counter.img", "url": "counter-icon.js", "evaluate": true}
    ]
-  }
+  },
+  { "id": "viewstl",
+  "name": "STL file viewer",
+  "shortName":"ViewSTL",
+  "icon": "icons8-octahedron-48.png",
+  "version":"0.01",
+  "description": "This app allows you to view STL 3D models on your watch",
+  "tags": "tool",
+  "storage": [
+    {"name":"viewstl.min.js","url":"viewstl.min.js"},
+    {"name":"viewstl.img","url":"viewstl-icon.js","evaluate":true},
+    {"name":"tetra.stl","url":"tetra.stl"}
+    {"name":"cube.stl","url":"cube.stl"},
+    {"name":"icosa.stl","url":"icosa.stl"},
+  ]
+ }
 ]
diff --git a/apps/viewstl/cube.stl b/apps/viewstl/cube.stl
new file mode 100644
index 000000000..4214221c9
--- /dev/null
+++ b/apps/viewstl/cube.stl
@@ -0,0 +1,86 @@
+solid OpenSCAD_Model
+  facet normal -0 0 1
+    outer loop
+      vertex -5 5 5
+      vertex 5 -5 5
+      vertex 5 5 5
+    endloop
+  endfacet
+  facet normal 0 0 1
+    outer loop
+      vertex 5 -5 5
+      vertex -5 5 5
+      vertex -5 -5 5
+    endloop
+  endfacet
+  facet normal 0 0 -1
+    outer loop
+      vertex -5 -5 -5
+      vertex 5 5 -5
+      vertex 5 -5 -5
+    endloop
+  endfacet
+  facet normal -0 0 -1
+    outer loop
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+  endfacet
+  facet normal 0 -1 0
+    outer loop
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+    endloop
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+  endfacet
+  facet normal 1 -0 0
+    outer loop
+      vertex 5 -5 5
+      vertex 5 5 -5
+      vertex 5 5 5
+    endloop
+  endfacet
+  facet normal 1 0 0
+    outer loop
+      vertex 5 5 -5
+      vertex 5 -5 5
+      vertex 5 -5 -5
+    endloop
+  endfacet
+  facet normal 0 1 -0
+    outer loop
+      vertex 5 5 -5
+      vertex -5 5 5
+      vertex 5 5 5
+    endloop
+  endfacet
+  facet normal 0 1 0
+    outer loop
+      vertex -5 5 5
+      vertex 5 5 -5
+      vertex -5 5 -5
+    endloop
+  endfacet
+  facet normal -1 0 0
+    outer loop
+      vertex -5 -5 -5
+      vertex -5 5 5
+      vertex -5 5 -5
+    endloop
+  endfacet
+  facet normal -1 -0 0
+    outer loop
+      vertex -5 5 5
+      vertex -5 -5 -5
+      vertex -5 -5 5
+    endloop
+  endfacet
+endsolid OpenSCAD_Model
diff --git a/apps/viewstl/fish_s.stl b/apps/viewstl/fish_s.stl
new file mode 100644
index 000000000..70fd28b9a
--- /dev/null
+++ b/apps/viewstl/fish_s.stl
@@ -0,0 +1,756 @@
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+      vertex -11.3262 -44.522 6.83361
+      vertex -8.13067 -23.6992 -1.30367
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+      vertex 17.3528 -1.79909 6.83361
+      vertex 3.93356 7.88542 6.83361
+      vertex 1.50249 -9.34872 -1.30367
+      vertex -4.32624 -29.3666 -1.30367
+      vertex -8.13067 -23.6992 -1.30367
+      vertex -11.3262 -44.522 6.83361
+      vertex -8.13067 -16.3008 -1.30367
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+      vertex -4.32624 -29.3666 -1.30367
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+      vertex -4.32624 -29.3666 -1.30367
+      vertex 1.50249 -30.6513 -1.30367
+      vertex -8.13067 -16.3008 -1.30367
+      vertex -4.32624 -10.6334 -1.30367
+      vertex -11.3262 4.52203 6.83361
+      vertex 6.62818 -13.0479 -1.30367
+      vertex 17.3528 -1.79909 6.83361
+      vertex 1.50249 -9.34872 -1.30367
+      vertex 8.65248 -20 -1.30367
+      vertex 17.3528 -1.79909 6.83361
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+      vertex 32 20 72
+      vertex 32 45 -50
+      vertex 32 45 72
+      vertex 32 45 -50
+      vertex 32 20 72
+      vertex 32 20 -50
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+      vertex -32 45 -50
+      vertex -32 45 72
+      vertex -32 20 -50
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+      vertex 32 45 -50
+      vertex -32 45 72
+      vertex 32 45 72
+      vertex -32 45 72
+      vertex 32 45 -50
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diff --git a/apps/viewstl/viewstl-icon.js b/apps/viewstl/viewstl-icon.js
new file mode 100644
index 000000000..a7e39b378
--- /dev/null
+++ b/apps/viewstl/viewstl-icon.js
@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEwxH+AH4A/AH4A/AA07iAutF4IwrFwM7mgwqFwU7nQvBGE4uDSAYwmFwovEGEYuGF4owhFw4vGGD4uIF44wdFxM7mgwiFxU7nQvHGDInExOz2eJSBgwYEoll6/X1vX2YvNGCqGFxPXLoIyBF5wwTWwxfB1oyBL54wSFwwrBAAWtBQk0GDYuGr6KCMILvFF5owNFwyNDYIgADnQvNGBYuHAAOzR4dlBYovOGBU6nQwIxOt1ouGF7QABiE0GRIAHFhkPeJwSCGR4tLhMPFxowEGQQvLmguIhIuRGAwyLnQtIFyYwIAAKXGF4otCFyowKGQy4EFzIwMfoYtFFzIwNRQoucGBwuhGBgujGBYukGBQulGBAunGA4uoGAsPF1IwEF1YwDF1n+mkQF1gA/AH4A/ADI"));
diff --git a/apps/viewstl/viewstl.app.js b/apps/viewstl/viewstl.app.js
new file mode 100644
index 000000000..cc4da4371
--- /dev/null
+++ b/apps/viewstl/viewstl.app.js
@@ -0,0 +1,422 @@
+// globals
+var u = [0, 1, 0]; // axis of rotation
+var aux = new Float32Array(12);
+var p_aux = E.getAddressOf(aux, true);
+var a = 0.5;       // angle of rotation
+var light = new Float32Array(12);
+var p_light = E.getAddressOf(light, true);
+light[0] = 1/Math.sqrt(2);
+light[1] = 1/Math.sqrt(2);
+light[2] = 0;
+var filex = new Float32Array(6);
+var p_filex = E.getAddressOf(filex, true);
+var addr = new Int32Array(12);
+var p_addr = E.getAddressOf(addr, true);
+var polyp = new Int32Array(6);
+var p_polyp = E.getAddressOf(polyp, true);
+var polyedge = new Int32Array(8);
+var p_polyedge = E.getAddressOf(polyedge, true);
+var edges;
+var p_edges;
+var zbuf;
+var p_zbuf;
+var zDist;
+var points;
+var p_points;
+var rpoints;
+var p_rpoints;
+var npoints = 0;
+var faces;
+var p_faces;
+var vpoints;
+var p_vpoints;
+var normals;
+var p_normals;
+var rnormals;
+var p_rnormals;
+var lastTime;
+var nFrames = 0;
+var interv;
+var qZrot = false;
+var qWireframe = 0;
+var zBeta = 0;
+
+const c05 = Math.cos(0.05);
+const s05 = Math.sin(0.05);
+
+var c = E.compiledC(`
+// void rotatePoints(int, int, int, int)
+// void projectPoints(int, int, int, int)
+// void popZBuf(int, int, int, int)
+// int processFace(int, int, int)
+// void initEdges(int, int)
+// int findSlot(int, int, int)
+void rotatePoints(float *p, float *res, int len, float *u) {
+  float c = u[3];
+  float s = u[4];
+  for (int i=0; i<len; ++i) {
+    res[3*i  ] = p[3*i]*(c+u[0]*u[0]*(1-c)) + p[3*i+1]*(u[0]*u[1]*(1-c)-u[2]*s) + p[3*i+2]*(u[0]*u[2]*(1-c)+u[1]*s);
+    res[3*i+1] = p[3*i]*(u[1]*u[0]*(1-c)+u[2]*s) + p[3*i+1]*(c+u[1]*u[1]*(1-c)) + p[3*i+2]*(u[1]*u[2]*(1-c)-u[0]*s);
+    res[3*i+2] = p[3*i]*(u[2]*u[0]*(1-c)-u[1]*s) + p[3*i+1]*(u[2]*u[1]*(1-c)+u[0]*s) + p[3*i+2]*(c+u[2]*u[2]*(1-c));
+  }
+}
+void projectPoints(float *p, short *res, int len, int zd) {
+  float zdist = zd/100.0;
+  for (int i=0; i<len; ++i) {
+    float dz = p[3*i+2]-zdist;
+    res[2*i+0] = (short)(120.0+320.0*p[3*i+0]/dz);
+    res[2*i+1] = (short)(80.0+320.0*p[3*i+1]/dz);
+  }
+}
+void quick_sort(int *base, unsigned int nel)
+{
+  int *pivot;
+  int tmp;
+  unsigned int left, right;
+  if (nel < 2) return;
+  pivot = base;
+  left  = 0;
+  right = nel-1;
+  while (left < right) {
+    while (*(base+left)>*pivot && left<right) left++;
+	while (*(base+right)<*pivot && left<right) right--;
+	if (left<right && *(base+left)!=*(base+right)) {
+	  if (base+left==pivot) {
+		pivot = base+right;
+	  } else if (base+right==pivot) {
+		pivot = base+left;
+	  }
+      tmp = *(base+left); *(base+left) = *(base+right); *(base+right) = tmp;
+	} else {
+	  left++;
+    }
+  }
+  quick_sort(base, left-1);
+  quick_sort(base+left, nel-left);
+}
+void popZBuf(float *p, unsigned short *f, int *zb, int len) {
+  for (int i=0; i<len; ++i) {
+    int z = int(1000.0*(p[f[i*3]*3+2]+p[f[i*3+1]*3+2]+p[f[i*3+2]*3+2]));
+    zb[i] = (z<<10) | i;
+  }
+  quick_sort(zb, len);
+}
+int processFace(int *p, int z, int qWire) {
+  short *faces    = (short *)p[0];
+  float *rnormals = (float *)p[1];
+  short *vpoints  = (short *)p[2];
+  int *polyp      = (int *)p[3];
+  float *light    = (float *)p[4];
+  char *edges     = (char *)p[5];
+  int *polyedge   = (int *)p[6];
+  int shade;
+  z = z & 0x3ff;
+  if (rnormals[z*3+2]>0) {
+    for (int j=0; j<3; ++j) {
+      polyp[j*2+0] = vpoints[faces[z*3+j]*2];
+      polyp[j*2+1] = vpoints[faces[z*3+j]*2+1];
+    }
+    if (qWire) {
+      char e = edges[z];
+      switch(e) {
+        case 1:
+          polyedge[0]=polyp[0];polyedge[1]=polyp[1];
+          polyedge[2]=polyp[2];polyedge[3]=polyp[3];
+          polyedge[4]=polyp[0];polyedge[5]=polyp[1];
+          polyedge[6]=polyp[2];polyedge[7]=polyp[3];
+          break;
+        case 2:
+          polyedge[0]=polyp[2];polyedge[1]=polyp[3];
+          polyedge[2]=polyp[4];polyedge[3]=polyp[5];
+          polyedge[4]=polyp[2];polyedge[5]=polyp[3];
+          polyedge[6]=polyp[4];polyedge[7]=polyp[5];
+          break;
+        case 4:
+          polyedge[0]=polyp[4];polyedge[1]=polyp[5];
+          polyedge[2]=polyp[0];polyedge[3]=polyp[1];
+          polyedge[4]=polyp[4];polyedge[5]=polyp[5];
+          polyedge[6]=polyp[0];polyedge[7]=polyp[1];
+          break;
+        case 7:
+          for (int k=0; k<6; ++k) polyedge[k] = polyp[k];
+          polyedge[6] = polyp[0]; polyedge[7] = polyp[1];
+          break;
+        case 3:
+          for (int k=0; k<6; ++k) polyedge[k] = polyp[k];
+          polyedge[6]=polyp[4]; polyedge[7]=polyp[5];
+          break;
+        case 5:
+          polyedge[0]=polyp[4];polyedge[1]=polyp[5];
+          polyedge[2]=polyp[0];polyedge[3]=polyp[1];
+          polyedge[4]=polyp[2];polyedge[5]=polyp[3];
+          polyedge[6]=polyp[2];polyedge[7]=polyp[3];
+          break;
+        case 6:
+          polyedge[0]=polyp[2];polyedge[1]=polyp[3];
+          polyedge[2]=polyp[4];polyedge[3]=polyp[5];
+          polyedge[4]=polyp[0];polyedge[5]=polyp[1];
+          polyedge[6]=polyp[0];polyedge[7]=polyp[1];
+          break;
+        default:
+          for (int k=0; k<8; ++k) polyedge[k]=-1;
+      }
+    }
+    float s = 0.2+(1.0+rnormals[3*z+0]*light[0]+rnormals[3*z+1]*light[1]+rnormals[3*z+2]*light[2])/2.9;
+    shade = int(s*31) | (int(s*63)<<5) | (int(s*31)<<11);
+    return shade;
+  }
+  else return 0;
+}
+void initEdges(int *p, int len) {
+  short *faces   = (short *)p[0];
+  char *edges    = (char *)p[5];
+  float *normals = (float *)p[7];
+  for (int i=0; i<len; ++i) {
+    char r=0;
+    for (int j=0; j<3; ++j) {
+      short e1=faces[j+i*3];
+      short e2=faces[((j+1) % 3)+i*3];
+      int k = len;
+      while (k--) {
+        if (i!=k && ((faces[k*3+1]==e1 && faces[k*3]==e2) || (faces[k*3+2]==e1 && faces[k*3+1]==e2) || (faces[k*3]==e1 && faces[k*3+2]==e2))) {
+          if (normals[k*3]*normals[i*3]+normals[k*3+1]*normals[i*3+1]+normals[k*3+2]*normals[i*3+2] < 0.95) r |= (1<<j);
+          k=0;
+        }
+      }
+    }
+    edges[i] = r;
+  }
+}
+int findSlot(float *p, float *x, int len) {
+  for (int i=0; i<len; ++i) 
+    if (p[3*i]-x[0]<0.0001 && p[3*i]-x[0]>-0.0001 && p[3*i+1]-x[1]<0.0001 && p[3*i+1]-x[1]>-0.0001 && p[3*i+2]-x[2]<0.0001 && p[3*i+2]-x[2]>-0.0001) return i;
+  p[3*len] = x[0];
+  p[3*len+1] = x[1];
+  p[3*len+2] = x[2];
+  return len;
+}
+typedef unsigned int uint32_t;
+typedef signed int int32_t;
+typedef unsigned char uint8_t;
+/*
+https://github.com/espruino/Espruino/blob/master/targetlibs/nrf5x_12/components/toolchain/cmsis/include/cmsis_gcc.h
+*/
+__attribute__( ( always_inline ) ) static inline uint32_t __get_FPSCR(void)
+{
+  uint32_t result;
+  /* Empty asm statement works as a scheduling barrier */
+  __asm volatile ("");
+  __asm volatile ("VMRS %0, fpscr" : "=r" (result) );
+  __asm volatile ("");
+  return(result);
+}
+__attribute__( ( always_inline ) ) static inline void __set_FPSCR(uint32_t fpscr)
+{
+  /* Empty asm statement works as a scheduling barrier */
+  __asm volatile ("");
+  __asm volatile ("VMSR fpscr, %0" : : "r" (fpscr) : "vfpcc");
+  __asm volatile ("");
+}
+`);
+
+function initNormals() {
+  var i = faces.length/3;
+  while (i--) {
+    normals[i*3+0] = (points[faces[3*i+1]*3+1]-points[faces[3*i+0]*3+1])*(points[faces[3*i+2]*3+2]-points[faces[3*i+0]*3+2]) - (points[faces[3*i+1]*3+2]-points[faces[3*i+0]*3+2])*(points[faces[3*i+2]*3+1]-points[faces[3*i+0]*3+1]);
+    normals[i*3+1] = (points[faces[3*i+1]*3+2]-points[faces[3*i+0]*3+2])*(points[faces[3*i+2]*3+0]-points[faces[3*i+0]*3+0]) - (points[faces[3*i+1]*3+0]-points[faces[3*i+0]*3+0])*(points[faces[3*i+2]*3+2]-points[faces[3*i+0]*3+2]);
+    normals[i*3+2] = (points[faces[3*i+1]*3+0]-points[faces[3*i+0]*3+0])*(points[faces[3*i+2]*3+1]-points[faces[3*i+0]*3+1]) - (points[faces[3*i+1]*3+1]-points[faces[3*i+0]*3+1])*(points[faces[3*i+2]*3+0]-points[faces[3*i+0]*3+0]);
+    var n = Math.sqrt(normals[i*3]*normals[i*3]+normals[i*3+1]*normals[i*3+1]+normals[i*3+2]*normals[i*3+2]);
+    if (n>0) {
+      normals[i*3] /= -n;
+      normals[i*3+1] /= -n;
+      normals[i*3+2] /= -n;
+    }
+  }
+}
+
+function readSTL(fn) {
+  var fb = require("Storage").read(fn);
+  var nverts=0,i=0; while(i=fb.indexOf("vertex",i)+1) nverts++;
+  points = new Float32Array(nverts);
+  p_points = E.getAddressOf(points, true);
+  faces = new Uint16Array(nverts);
+  p_faces = E.getAddressOf(faces, true);
+  edges = new Uint8Array(Math.max(faces.length/3,24))
+  p_edges = E.getAddressOf(edges, true);
+  var fp=0, p=0;
+  var nf = 0;
+  g.setColor(0.9, 0.9, 0.9);
+  g.drawRect(20, 140, 220, 160);
+  g.setColor(0.6, 0.6, 0.9);
+  while (p<fb.length) {
+    var line = '';
+    while (fb[p]!="\n") line += fb[p++];
+    p++;
+    if (line.toLowerCase().includes("vertex")) {
+      var v = line.trim().split(/\s+/);
+      filex[0] = v[1];
+      filex[1] = v[3];
+      filex[2] = v[2];
+      var slot = 0|c.findSlot(p_points, p_filex, npoints);
+      if (slot==npoints) npoints++;
+      faces[fp++] = slot;
+      if (fp%3 == 0) g.fillRect(21, 141, 21+198*fp/nverts, 159);
+    }
+  }
+  vpoints = new Uint16Array(Math.max(12,2*npoints));
+  p_vpoints = E.getAddressOf(vpoints, true);
+  normals = new Float32Array(faces.length);
+  p_normals = E.getAddressOf(normals, true);
+  initNormals();
+  rnormals = new Float32Array(faces.length);
+  p_rnormals = E.getAddressOf(rnormals, true);
+  rpoints = new Float32Array(points.length);
+  p_rpoints = E.getAddressOf(rpoints, true);
+  zbuf = new Int32Array(Math.max(12,faces.length/3));
+  p_zbuf = E.getAddressOf(zbuf, true);
+  addr[0] = p_faces;
+  addr[1] = p_rnormals;
+  addr[2] = p_vpoints;
+  addr[3] = p_polyp; 
+  addr[4] = p_light; 
+  addr[5] = p_edges;
+  addr[6] = p_polyedge;
+  addr[7] = p_normals;
+  c.initEdges(p_addr, faces.length/3);
+  console.log(edges);
+}
+
+function rotV(v, u, c, s) { 
+  "ram"
+  return [v[0]*(c+u[0]*u[0]*(1-c)) + v[1]*(u[0]*u[1]*(1-c)-u[2]*s) + v[2]*(u[0]*u[2]*(1-c)+u[1]*s),
+          v[0]*(u[1]*u[0]*(1-c)+u[2]*s) + v[1]*(c+u[1]*u[1]*(1-c)) + v[2]*(u[1]*u[2]*(1-c)-u[0]*s),
+          v[0]*(u[2]*u[0]*(1-c)-u[1]*s) + v[1]*(u[2]*u[1]*(1-c)+u[0]*s) + v[2]*(c+u[2]*u[2]*(1-c))]; 
+}
+
+function largestExtent(pts) {
+  var x = 0;
+  var i = pts.length/3;
+  while (i--) {
+    var e = pts[3*i]*pts[3*i]+pts[3*i+1]*pts[3*i+1]+pts[3*i+2]*pts[3*i+2];
+    if (e>x) x = e;
+  }
+  return Math.sqrt(x);
+}
+
+function draw() {
+  "ram"
+  const n = [1, 0, 0];
+  if (qZrot) {
+    var ca=Math.cos(a), sa=Math.sin(a), cb=Math.cos(zBeta), sb=Math.sin(zBeta);
+    var ul = Math.sqrt(sb*sb+ca*ca*sb*sb+2*sa*sa*cb+2*ca*sb*sb+2*sa*sa);
+    u = [(sb+ca*sb)/ul, (-sa-sa*cb)/ul, (-sa*sb)/ul];
+    var ra = Math.acos((ca+cb+ca*cb-1)/2);
+    if (ra<0) ra += Math.PI;
+    aux[3] = Math.cos(ra);
+    aux[4] = Math.sin(ra);
+  }
+  else {
+    u = rotV(u, n, c05, s05);
+    aux[3] = Math.cos(a);
+    aux[4] = Math.sin(a);
+  }
+  a += 0.08;
+  aux[0] = u[0]; aux[1]=u[1]; aux[2]=u[2];
+  c.rotatePoints(p_points, p_rpoints, npoints, p_aux);
+  c.rotatePoints(p_normals, p_rnormals, faces.length/3, p_aux);
+  c.projectPoints(p_rpoints, p_vpoints, npoints, 0|zDist*100);
+  c.popZBuf(p_rpoints, p_faces, p_zbuf, faces.length/3);
+  g.clear();
+  var z, shade;
+  if (qWireframe>0) {
+    var i = faces.length/3;
+    while (i--) {
+      z = zbuf[i];
+      shade = 0|c.processFace(p_addr, z, 1);
+      if (shade > 0) {
+        if (qWireframe==1) g.setColor(shade).fillPoly(polyp).setColor(0).drawPoly(polyedge);
+        else {
+          g.setColor(0).fillPoly(polyp).setColor(shade);
+          if (qWireframe==2) g.drawPoly(polyedge);
+          else g.drawPoly(polyp, true);
+        }
+      }
+    } 
+  }
+  else {
+    var i = faces.length/3;
+    while (i--) {
+      z = zbuf[i];
+      shade = 0|c.processFace(p_addr, z, 0);
+      if (shade > 0) g.setColor(shade).fillPoly(polyp);
+    }
+  }
+  nFrames++;
+  var fps = Math.round(nFrames*100000/(Date.now()-lastTime))/100;
+  g.setColor(0.7, 0.7, 0.7);
+  g.setFont("6x8", 1);
+  g.drawString("fps:"+fps.toString(), 20, 0);
+  g.flip();
+}
+
+function loadFile(fn) {
+  Bangle.setLCDMode("direct");
+  g.clear();
+  E.showMenu();
+  E.showMessage("Loading...", fn);
+  readSTL(fn);
+  zDist = 5*largestExtent(points);
+  g.clear();
+  g.setColor(1, 1, 1);
+  g.setFont("6x8", 2);
+  g.setFontAlign(-1, -1);
+  g.setColor(1, 0.5, 0.5);
+  g.drawString("Model info",15, 40);
+  g.setColor(1, 1, 1);
+  g.drawString("# faces: "+faces.length/3, 15, 80);
+  g.drawString("# vertices: "+npoints, 15, 110);
+  g.drawString("max extent: "+Math.round(100*(zDist/5))/100, 15, 140);
+  g.flip();
+  setWatch(function() {
+    if (interv) { 
+      interv = clearInterval(interv);
+      load();
+    }
+    else {
+      Bangle.setLCDMode("doublebuffered");
+      lastTime = Date.now();
+      nFrames = 0;
+      interv = setInterval(function() { draw();}, 30);
+    } }, BTN2, {repeat:true, debounce:50});
+  setWatch(function() {
+    if (qZrot && zBeta<2*Math.PI/2-0.08) zBeta += 0.08;
+    else zDist *= 0.9;
+  }, BTN1, {repeat:true});
+  setWatch(function() {
+    if (qZrot && zBeta>-2*Math.PI/2-0.08) zBeta -= 0.08;
+    else zDist /= 0.9;
+  }, BTN3, {repeat:true});
+  Bangle.on('swipe', function(direction){
+    switch(direction){
+      case 1:
+        qZrot = !qZrot;
+        break;
+      case -1:
+        qWireframe = (qWireframe+1)%4;
+        break;
+  }});
+}
+
+function drawMenu() {
+  const menu = {
+    '': { 'title': 'STL files' }
+  };
+  var files = require("Storage").list(".stl");
+  for (var i=0; i<files.length; ++i) {
+    menu[files[i]] = loadFile.bind(null, files[i]);
+  }
+  menu['Exit'] = function() { load(); };
+  E.showMenu(menu);
+}
+
+drawMenu();
diff --git a/apps/viewstl/viewstl.min.js b/apps/viewstl/viewstl.min.js
new file mode 100644
index 000000000..e4b506161
--- /dev/null
+++ b/apps/viewstl/viewstl.min.js
@@ -0,0 +1,272 @@
+// globals
+var u = [0, 1, 0]; // axis of rotation
+var aux = new Float32Array(12);
+var p_aux = E.getAddressOf(aux, true);
+var a = 0.5;       // angle of rotation
+var light = new Float32Array(12);
+var p_light = E.getAddressOf(light, true);
+light[0] = 1/Math.sqrt(2);
+light[1] = 1/Math.sqrt(2);
+light[2] = 0;
+var filex = new Float32Array(6);
+var p_filex = E.getAddressOf(filex, true);
+var addr = new Int32Array(12);
+var p_addr = E.getAddressOf(addr, true);
+var polyp = new Int32Array(6);
+var p_polyp = E.getAddressOf(polyp, true);
+var polyedge = new Int32Array(8);
+var p_polyedge = E.getAddressOf(polyedge, true);
+var edges;
+var p_edges;
+var zbuf;
+var p_zbuf;
+var zDist;
+var points;
+var p_points;
+var rpoints;
+var p_rpoints;
+var npoints = 0;
+var faces;
+var p_faces;
+var vpoints;
+var p_vpoints;
+var normals;
+var p_normals;
+var rnormals;
+var p_rnormals;
+var lastTime;
+var nFrames = 0;
+var interv;
+var qZrot = false;
+var qWireframe = 0;
+var zBeta = 0;
+
+const c05 = Math.cos(0.05);
+const s05 = Math.sin(0.05);
+
+var c = (function(){
+  var bin=atob("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");
+  return {
+    rotatePoints:E.nativeCall(1253, "void(int, int, int, int)", bin),
+    projectPoints:E.nativeCall(1121, "void(int, int, int, int)", bin),
+    popZBuf:E.nativeCall(1021, "void(int, int, int, int)", bin),
+    processFace:E.nativeCall(461, "int(int, int, int)", bin),
+    initEdges:E.nativeCall(209, "void(int, int)", bin),
+    findSlot:E.nativeCall(57, "int(int, int, int)", bin),
+    clearFPU:E.nativeCall(25, "void()", bin),
+    getFPSCR:E.nativeCall(1, "int()", bin),
+    getFPUPendingIRQ:E.nativeCall(9, "int()", bin),
+  };
+})();
+
+function initNormals() {
+  var i = faces.length/3;
+  while (i--) {
+    normals[i*3+0] = (points[faces[3*i+1]*3+1]-points[faces[3*i+0]*3+1])*(points[faces[3*i+2]*3+2]-points[faces[3*i+0]*3+2]) - (points[faces[3*i+1]*3+2]-points[faces[3*i+0]*3+2])*(points[faces[3*i+2]*3+1]-points[faces[3*i+0]*3+1]);
+    normals[i*3+1] = (points[faces[3*i+1]*3+2]-points[faces[3*i+0]*3+2])*(points[faces[3*i+2]*3+0]-points[faces[3*i+0]*3+0]) - (points[faces[3*i+1]*3+0]-points[faces[3*i+0]*3+0])*(points[faces[3*i+2]*3+2]-points[faces[3*i+0]*3+2]);
+    normals[i*3+2] = (points[faces[3*i+1]*3+0]-points[faces[3*i+0]*3+0])*(points[faces[3*i+2]*3+1]-points[faces[3*i+0]*3+1]) - (points[faces[3*i+1]*3+1]-points[faces[3*i+0]*3+1])*(points[faces[3*i+2]*3+0]-points[faces[3*i+0]*3+0]);
+    var n = Math.sqrt(normals[i*3]*normals[i*3]+normals[i*3+1]*normals[i*3+1]+normals[i*3+2]*normals[i*3+2]);
+    if (n>0) {
+      normals[i*3] /= -n;
+      normals[i*3+1] /= -n;
+      normals[i*3+2] /= -n;
+    }
+  }
+}
+
+function readSTL(fn) {
+  var fb = require("Storage").read(fn);
+  var nverts=0,i=0; while(i=fb.indexOf("vertex",i)+1) nverts++;
+  points = new Float32Array(nverts);
+  p_points = E.getAddressOf(points, true);
+  faces = new Uint16Array(nverts);
+  p_faces = E.getAddressOf(faces, true);
+  edges = new Uint8Array(Math.max(faces.length/3,24))
+  p_edges = E.getAddressOf(edges, true);
+  var fp=0, p=0;
+  var nf = 0;
+  g.setColor(0.9, 0.9, 0.9);
+  g.drawRect(20, 140, 220, 160);
+  g.setColor(0.6, 0.6, 0.9);
+  while (p<fb.length) {
+    var line = '';
+    while (fb[p]!="\n") line += fb[p++];
+    p++;
+    if (line.toLowerCase().includes("vertex")) {
+      var v = line.trim().split(/\s+/);
+      filex[0] = v[1];
+      filex[1] = v[3];
+      filex[2] = v[2];
+      var slot = 0|c.findSlot(p_points, p_filex, npoints);
+      if (slot==npoints) npoints++;
+      faces[fp++] = slot;
+      if (fp%3 == 0) g.fillRect(21, 141, 21+198*fp/nverts, 159);
+    }
+  }
+  vpoints = new Uint16Array(Math.max(12,2*npoints));
+  p_vpoints = E.getAddressOf(vpoints, true);
+  normals = new Float32Array(faces.length);
+  p_normals = E.getAddressOf(normals, true);
+  initNormals();
+  rnormals = new Float32Array(faces.length);
+  p_rnormals = E.getAddressOf(rnormals, true);
+  rpoints = new Float32Array(points.length);
+  p_rpoints = E.getAddressOf(rpoints, true);
+  zbuf = new Int32Array(Math.max(12,faces.length/3));
+  p_zbuf = E.getAddressOf(zbuf, true);
+  addr[0] = p_faces;
+  addr[1] = p_rnormals;
+  addr[2] = p_vpoints;
+  addr[3] = p_polyp; 
+  addr[4] = p_light; 
+  addr[5] = p_edges;
+  addr[6] = p_polyedge;
+  addr[7] = p_normals;
+  c.initEdges(p_addr, faces.length/3);
+  console.log(edges);
+}
+
+function rotV(v, u, c, s) { 
+  "ram"
+  return [v[0]*(c+u[0]*u[0]*(1-c)) + v[1]*(u[0]*u[1]*(1-c)-u[2]*s) + v[2]*(u[0]*u[2]*(1-c)+u[1]*s),
+          v[0]*(u[1]*u[0]*(1-c)+u[2]*s) + v[1]*(c+u[1]*u[1]*(1-c)) + v[2]*(u[1]*u[2]*(1-c)-u[0]*s),
+          v[0]*(u[2]*u[0]*(1-c)-u[1]*s) + v[1]*(u[2]*u[1]*(1-c)+u[0]*s) + v[2]*(c+u[2]*u[2]*(1-c))]; 
+}
+
+function largestExtent(pts) {
+  var x = 0;
+  var i = pts.length/3;
+  while (i--) {
+    var e = pts[3*i]*pts[3*i]+pts[3*i+1]*pts[3*i+1]+pts[3*i+2]*pts[3*i+2];
+    if (e>x) x = e;
+  }
+  return Math.sqrt(x);
+}
+
+function draw() {
+  "ram"
+  const n = [1, 0, 0];
+  if (qZrot) {
+    var ca=Math.cos(a), sa=Math.sin(a), cb=Math.cos(zBeta), sb=Math.sin(zBeta);
+    var ul = Math.sqrt(sb*sb+ca*ca*sb*sb+2*sa*sa*cb+2*ca*sb*sb+2*sa*sa);
+    u = [(sb+ca*sb)/ul, (-sa-sa*cb)/ul, (-sa*sb)/ul];
+    var ra = Math.acos((ca+cb+ca*cb-1)/2);
+    if (ra<0) ra += Math.PI;
+    aux[3] = Math.cos(ra);
+    aux[4] = Math.sin(ra);
+  }
+  else {
+    u = rotV(u, n, c05, s05);
+    aux[3] = Math.cos(a);
+    aux[4] = Math.sin(a);
+  }
+  a += 0.08;
+  aux[0] = u[0]; aux[1]=u[1]; aux[2]=u[2];
+  c.rotatePoints(p_points, p_rpoints, npoints, p_aux);
+  c.rotatePoints(p_normals, p_rnormals, faces.length/3, p_aux);
+  c.projectPoints(p_rpoints, p_vpoints, npoints, 0|zDist*100);
+  c.popZBuf(p_rpoints, p_faces, p_zbuf, faces.length/3);
+  g.clear();
+  var z, shade;
+  if (qWireframe>0) {
+    var i = faces.length/3;
+    while (i--) {
+      z = zbuf[i];
+      shade = 0|c.processFace(p_addr, z, 1);
+      if (shade > 0) {
+        if (qWireframe==1) {
+          g.setColor(shade);
+          g.fillPoly(polyp);
+          g.setColor(0);
+          g.drawPoly(polyedge);
+        }
+        else {
+          g.setColor(0);
+          g.fillPoly(polyp);
+          g.setColor(shade);
+          if (qWireframe==2) g.drawPoly(polyedge);
+          else g.drawPoly(polyp, true);
+        }
+      }
+    } 
+  }
+  else {
+    var i = faces.length/3;
+    while (i--) {
+      z = zbuf[i];
+      shade = 0|c.processFace(p_addr, z, 0);
+      if (shade > 0) {
+        g.setColor(shade);
+        g.fillPoly(polyp);
+      }
+    }
+  }
+  nFrames++;
+  var fps = Math.round(nFrames*100000/(Date.now()-lastTime))/100;
+  g.setColor(0.7, 0.7, 0.7);
+  g.setFont("6x8", 1);
+  g.drawString("fps:"+fps.toString(), 20, 0);
+  g.flip();
+}
+
+function loadFile(fn) {
+  Bangle.setLCDMode("direct");
+  g.clear();
+  E.showMenu();
+  E.showMessage("Loading...", fn);
+  readSTL(fn);
+  zDist = 5*largestExtent(points);
+  g.clear();
+  g.setColor(1, 1, 1);
+  g.setFont("6x8", 2);
+  g.setFontAlign(-1, -1);
+  g.setColor(1, 0.5, 0.5);
+  g.drawString("Model info",15, 40);
+  g.setColor(1, 1, 1);
+  g.drawString("# faces: "+faces.length/3, 15, 80);
+  g.drawString("# vertices: "+npoints, 15, 110);
+  g.drawString("max extent: "+Math.round(100*(zDist/5))/100, 15, 140);
+  g.flip();
+  setWatch(function() {
+    if (interv) { 
+      interv = clearInterval(interv);
+      c.clearFPU(); load();
+    }
+    else {
+      Bangle.setLCDMode("doublebuffered");
+      lastTime = Date.now();
+      nFrames = 0;
+      interv = setInterval(function() { draw();}, 30);
+    } }, BTN2, {repeat:true, debounce:50});
+  setWatch(function() {
+    if (qZrot && zBeta<2*Math.PI/2-0.08) zBeta += 0.08;
+    else zDist *= 0.9;
+  }, BTN1, {repeat:true});
+  setWatch(function() {
+    if (qZrot && zBeta>-2*Math.PI/2-0.08) zBeta -= 0.08;
+    else zDist /= 0.9;
+  }, BTN3, {repeat:true});
+  Bangle.on('swipe', function(direction){
+    switch(direction){
+      case 1:
+        qZrot = !qZrot;
+        break;
+      case -1:
+        qWireframe = (qWireframe+1)%4;
+        break;
+  }});
+}
+
+function drawMenu() {
+  const menu = {
+    '': { 'title': 'STL files' }
+  };
+  var files = require("Storage").list(".stl");
+  for (var i=0; i<files.length; ++i) {
+    menu[files[i]] = loadFile.bind(null, files[i]);
+  }
+  menu['Exit'] = function() { c.clearFPU(); load(); };
+  E.showMenu(menu);
+}
+
+drawMenu();

From fe0969657984889ccf034be8445480fa353e2bf7 Mon Sep 17 00:00:00 2001
From: marko <marko.kl.berkenbusch@gmail.com>
Date: Thu, 13 Aug 2020 13:59:00 -0400
Subject: [PATCH 2/9] Fix app list

---
 apps.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/apps.json b/apps.json
index 6495883c1..2cfc40b10 100644
--- a/apps.json
+++ b/apps.json
@@ -2153,9 +2153,9 @@
   "storage": [
     {"name":"viewstl.min.js","url":"viewstl.min.js"},
     {"name":"viewstl.img","url":"viewstl-icon.js","evaluate":true},
-    {"name":"tetra.stl","url":"tetra.stl"}
+    {"name":"tetra.stl","url":"tetra.stl"},
     {"name":"cube.stl","url":"cube.stl"},
-    {"name":"icosa.stl","url":"icosa.stl"},
+    {"name":"icosa.stl","url":"icosa.stl"}
   ]
  }
 ]

From ed1970456da872cdf623e7901e91dabf23ffe1ae Mon Sep 17 00:00:00 2001
From: marko <marko.kl.berkenbusch@gmail.com>
Date: Thu, 13 Aug 2020 14:06:51 -0400
Subject: [PATCH 3/9] Fix another app list typo

---
 apps.json                   | 2 +-
 apps/viewstl/viewstl.min.js | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/apps.json b/apps.json
index 2cfc40b10..b7b23c173 100644
--- a/apps.json
+++ b/apps.json
@@ -2151,7 +2151,7 @@
   "description": "This app allows you to view STL 3D models on your watch",
   "tags": "tool",
   "storage": [
-    {"name":"viewstl.min.js","url":"viewstl.min.js"},
+    {"name":"viewstl.apps.js","url":"viewstl.min.js"},
     {"name":"viewstl.img","url":"viewstl-icon.js","evaluate":true},
     {"name":"tetra.stl","url":"tetra.stl"},
     {"name":"cube.stl","url":"cube.stl"},
diff --git a/apps/viewstl/viewstl.min.js b/apps/viewstl/viewstl.min.js
index e4b506161..b6f49675d 100644
--- a/apps/viewstl/viewstl.min.js
+++ b/apps/viewstl/viewstl.min.js
@@ -123,7 +123,6 @@ function readSTL(fn) {
   addr[6] = p_polyedge;
   addr[7] = p_normals;
   c.initEdges(p_addr, faces.length/3);
-  console.log(edges);
 }
 
 function rotV(v, u, c, s) { 

From d2aa245a0e1749ae6edcf517ae09f80e0b3ff54a Mon Sep 17 00:00:00 2001
From: marko <marko.kl.berkenbusch@gmail.com>
Date: Thu, 13 Aug 2020 14:11:02 -0400
Subject: [PATCH 4/9] And another typo

---
 apps.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps.json b/apps.json
index b7b23c173..d6011e002 100644
--- a/apps.json
+++ b/apps.json
@@ -2151,7 +2151,7 @@
   "description": "This app allows you to view STL 3D models on your watch",
   "tags": "tool",
   "storage": [
-    {"name":"viewstl.apps.js","url":"viewstl.min.js"},
+    {"name":"viewstl.app.js","url":"viewstl.min.js"},
     {"name":"viewstl.img","url":"viewstl-icon.js","evaluate":true},
     {"name":"tetra.stl","url":"tetra.stl"},
     {"name":"cube.stl","url":"cube.stl"},

From c5eac5707401e059bea436075b0f237f1864c35f Mon Sep 17 00:00:00 2001
From: marko <marko.kl.berkenbusch@gmail.com>
Date: Thu, 13 Aug 2020 17:15:07 -0400
Subject: [PATCH 5/9] Add README.md

---
 apps/viewstl/README.md | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 apps/viewstl/README.md

diff --git a/apps/viewstl/README.md b/apps/viewstl/README.md
new file mode 100644
index 000000000..bd54f15bb
--- /dev/null
+++ b/apps/viewstl/README.md
@@ -0,0 +1,23 @@
+# ViewSTL
+
+A simple viewer to render 3D models on-screen. The STL files have to be of the ASCII (non-binary) type. The rendering process can become quite slow
+for models with more than ~200-300 facets.
+
+The app contains a number of inlined C routines and makes use of the microcontroller's FPU. Therefore, the app installed on the watch contains a base64 encoded binary
+blob with those routines. The full C code is provided on github.
+
+## Controls
+
+The app supports 4 different rendering modes, swiping right-to-left on the touch screen cycles through them:
+- shaded polygons
+- shaded polygons with edge highlighting
+- wireframe, only edges between non-coplanar facets visible
+- wireframe, all facet (triangle) edges visible
+
+There are two different rotation modes that slightly alter the function of buttons 1 and 3, swiping left-to-right toggles between the two modes:
+- free rotation: button 1 zooms in, button 3 out
+- Z-axis (vertical axis) rotation: buttons 1 and 3 tilt the Z-axis
+
+There is currently no interface to upload STL files to the watch, the web IDE storage icon can be used instead.
+A future version might contain rotation based on accelerometer/magnetometer readings.
+

From deb597b307c3211c2e9198f84e82ef392ce2fd3b Mon Sep 17 00:00:00 2001
From: marko <marko.kl.berkenbusch@gmail.com>
Date: Thu, 13 Aug 2020 17:20:06 -0400
Subject: [PATCH 6/9] Add viewstl README.md to apps.json

---
 apps.json | 1 +
 1 file changed, 1 insertion(+)

diff --git a/apps.json b/apps.json
index d6011e002..57f2d1e1e 100644
--- a/apps.json
+++ b/apps.json
@@ -2150,6 +2150,7 @@
   "version":"0.01",
   "description": "This app allows you to view STL 3D models on your watch",
   "tags": "tool",
+  "readme": "README.md",
   "storage": [
     {"name":"viewstl.app.js","url":"viewstl.min.js"},
     {"name":"viewstl.img","url":"viewstl-icon.js","evaluate":true},

From c06e3b2458af11bbbd94be056a7289320da26a12 Mon Sep 17 00:00:00 2001
From: marko <marko.kl.berkenbusch@gmail.com>
Date: Thu, 13 Aug 2020 18:16:53 -0400
Subject: [PATCH 7/9] Remove spurous semicolon from icon.js

---
 apps/viewstl/viewstl-icon.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/viewstl/viewstl-icon.js b/apps/viewstl/viewstl-icon.js
index a7e39b378..afa7c1538 100644
--- a/apps/viewstl/viewstl-icon.js
+++ b/apps/viewstl/viewstl-icon.js
@@ -1 +1 @@
-require("heatshrink").decompress(atob("mEwxH+AH4A/AH4A/AA07iAutF4IwrFwM7mgwqFwU7nQvBGE4uDSAYwmFwovEGEYuGF4owhFw4vGGD4uIF44wdFxM7mgwiFxU7nQvHGDInExOz2eJSBgwYEoll6/X1vX2YvNGCqGFxPXLoIyBF5wwTWwxfB1oyBL54wSFwwrBAAWtBQk0GDYuGr6KCMILvFF5owNFwyNDYIgADnQvNGBYuHAAOzR4dlBYovOGBU6nQwIxOt1ouGF7QABiE0GRIAHFhkPeJwSCGR4tLhMPFxowEGQQvLmguIhIuRGAwyLnQtIFyYwIAAKXGF4otCFyowKGQy4EFzIwMfoYtFFzIwNRQoucGBwuhGBgujGBYukGBQulGBAunGA4uoGAsPF1IwEF1YwDF1n+mkQF1gA/AH4A/ADI"));
+require("heatshrink").decompress(atob("mEwxH+AH4A/AH4A/AA07iAutF4IwrFwM7mgwqFwU7nQvBGE4uDSAYwmFwovEGEYuGF4owhFw4vGGD4uIF44wdFxM7mgwiFxU7nQvHGDInExOz2eJSBgwYEoll6/X1vX2YvNGCqGFxPXLoIyBF5wwTWwxfB1oyBL54wSFwwrBAAWtBQk0GDYuGr6KCMILvFF5owNFwyNDYIgADnQvNGBYuHAAOzR4dlBYovOGBU6nQwIxOt1ouGF7QABiE0GRIAHFhkPeJwSCGR4tLhMPFxowEGQQvLmguIhIuRGAwyLnQtIFyYwIAAKXGF4otCFyowKGQy4EFzIwMfoYtFFzIwNRQoucGBwuhGBgujGBYukGBQulGBAunGA4uoGAsPF1IwEF1YwDF1n+mkQF1gA/AH4A/ADI"))

From 6294402ebe9d2e8658e26d0da7257a2e9c22a6d2 Mon Sep 17 00:00:00 2001
From: marko <marko.kl.berkenbusch@gmail.com>
Date: Thu, 13 Aug 2020 18:44:50 -0400
Subject: [PATCH 8/9] Attempt to pacify automatic checker

---
 apps/viewstl/viewstl.app.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/viewstl/viewstl.app.js b/apps/viewstl/viewstl.app.js
index cc4da4371..c732ef298 100644
--- a/apps/viewstl/viewstl.app.js
+++ b/apps/viewstl/viewstl.app.js
@@ -236,7 +236,7 @@ function initNormals() {
 
 function readSTL(fn) {
   var fb = require("Storage").read(fn);
-  var nverts=0,i=0; while(i=fb.indexOf("vertex",i)+1) nverts++;
+  var nverts=0,i=0; while((i=fb.indexOf("vertex",i)+1)!=0) nverts++;
   points = new Float32Array(nverts);
   p_points = E.getAddressOf(points, true);
   faces = new Uint16Array(nverts);

From 1cdf5d5ba8473b63d49431095bbe5dea7c658313 Mon Sep 17 00:00:00 2001
From: marko <marko.kl.berkenbusch@gmail.com>
Date: Thu, 13 Aug 2020 21:49:50 -0400
Subject: [PATCH 9/9] Pacify travis

---
 apps/viewstl/viewstl.min.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/viewstl/viewstl.min.js b/apps/viewstl/viewstl.min.js
index b6f49675d..227143f6f 100644
--- a/apps/viewstl/viewstl.min.js
+++ b/apps/viewstl/viewstl.min.js
@@ -76,7 +76,7 @@ function initNormals() {
 
 function readSTL(fn) {
   var fb = require("Storage").read(fn);
-  var nverts=0,i=0; while(i=fb.indexOf("vertex",i)+1) nverts++;
+  var nverts=0,i=0; while((i=fb.indexOf("vertex",i)+1)!=0) nverts++;
   points = new Float32Array(nverts);
   p_points = E.getAddressOf(points, true);
   faces = new Uint16Array(nverts);