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use enums for mutually exclusive options in simplify filter (#966)
authortsteven4 <13596209+tsteven4@users.noreply.github.com>
Fri, 30 Dec 2022 21:33:14 +0000 (14:33 -0700)
committerGitHub <noreply@github.com>
Fri, 30 Dec 2022 21:33:14 +0000 (14:33 -0700)
* clean up simplify options

* tweak names

* fiddle with simplify test trying to be plaform neutral.

* use stable sort when testing simplify filter

for cross platform matching.

reference/simplify_error_crosstrack.gpx [new file with mode: 0644] patch | blob
reference/simplify_error_length.gpx [new file with mode: 0644] patch | blob
smplrout.cc patch | blob | history
smplrout.h patch | blob | history
testo.d/simplify.test patch | blob | history

diff --git a/reference/simplify_error_crosstrack.gpx b/reference/simplify_error_crosstrack.gpx
new file mode 100644 (file)
index 0000000..7bc6648
--- /dev/null
+++ b/reference/simplify_error_crosstrack.gpx
@@ -0,0 +1,1853 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx version="1.0" creator="GPSBabel - https://www.gpsbabel.org" xmlns="http://www.topografix.com/GPX/1/0">
+  <time>1970-01-01T00:00:00Z</time>
+  <bounds minlat="48.154215105" minlon="11.807058938" maxlat="48.198396452" maxlon="11.895879619"/>
+  <wpt lat="48.186895391" lon="11.858545868">
+    <name>LAP001</name>
+    <cmt>LAP001</cmt>
+    <desc>LAP001</desc>
+  </wpt>
+  <trk>
+    <trkseg>
+      <trkpt lat="48.189526470" lon="11.858895309">
+        <ele>512.800</ele>
+        <time>2012-04-12T12:53:58Z</time>
+        <speed>6.823000</speed>
+      </trkpt>
+      <trkpt lat="48.189850515" lon="11.859066384">
+        <ele>510.200</ele>
+        <time>2012-04-12T12:54:05Z</time>
+        <speed>4.681000</speed>
+      </trkpt>
+      <trkpt lat="48.189893346" lon="11.858994300">
+        <ele>510.200</ele>
+        <time>2012-04-12T12:54:07Z</time>
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+      </trkpt>
+      <trkpt lat="48.189789243" lon="11.858393485">
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diff --git a/reference/simplify_error_length.gpx b/reference/simplify_error_length.gpx
new file mode 100644 (file)
index 0000000..4a16223
--- /dev/null
+++ b/reference/simplify_error_length.gpx
@@ -0,0 +1,1688 @@
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+        <speed>5.486000</speed>
+      </trkpt>
+      <trkpt lat="48.185261004" lon="11.867565047">
+        <ele>529.400</ele>
+        <time>2012-04-12T13:51:18Z</time>
+        <speed>6.681000</speed>
+      </trkpt>
+      <trkpt lat="48.186064661" lon="11.867585666">
+        <ele>529.400</ele>
+        <time>2012-04-12T13:51:31Z</time>
+        <speed>6.152000</speed>
+      </trkpt>
+      <trkpt lat="48.186160047" lon="11.867624056">
+        <ele>529.400</ele>
+        <time>2012-04-12T13:51:33Z</time>
+        <speed>5.175000</speed>
+      </trkpt>
+      <trkpt lat="48.186224671" lon="11.867518360">
+        <ele>529.400</ele>
+        <time>2012-04-12T13:51:35Z</time>
+        <speed>4.630000</speed>
+      </trkpt>
+      <trkpt lat="48.186202124" lon="11.867366061">
+        <ele>529.400</ele>
+        <time>2012-04-12T13:51:37Z</time>
+        <speed>5.394000</speed>
+      </trkpt>
+      <trkpt lat="48.186184689" lon="11.865461441">
+        <ele>533.600</ele>
+        <time>2012-04-12T13:51:58Z</time>
+        <speed>6.307000</speed>
+      </trkpt>
+      <trkpt lat="48.186138505" lon="11.864733472">
+        <ele>536.400</ele>
+        <time>2012-04-12T13:52:08Z</time>
+        <speed>5.016000</speed>
+      </trkpt>
+      <trkpt lat="48.186149569" lon="11.864121677">
+        <ele>539.400</ele>
+        <time>2012-04-12T13:52:17Z</time>
+        <speed>4.804000</speed>
+      </trkpt>
+      <trkpt lat="48.186195418" lon="11.863884218">
+        <ele>540.200</ele>
+        <time>2012-04-12T13:52:21Z</time>
+        <speed>4.605000</speed>
+      </trkpt>
+      <trkpt lat="48.186216708" lon="11.863832669">
+        <ele>540.200</ele>
+        <time>2012-04-12T13:52:22Z</time>
+        <speed>4.407000</speed>
+      </trkpt>
+      <trkpt lat="48.186324751" lon="11.863736026">
+        <ele>541.600</ele>
+        <time>2012-04-12T13:52:25Z</time>
+        <speed>4.724000</speed>
+      </trkpt>
+      <trkpt lat="48.187041068" lon="11.863661427">
+        <ele>542.400</ele>
+        <time>2012-04-12T13:52:39Z</time>
+        <speed>6.285000</speed>
+      </trkpt>
+      <trkpt lat="48.187131425" lon="11.863551121">
+        <ele>542.400</ele>
+        <time>2012-04-12T13:52:41Z</time>
+        <speed>6.516000</speed>
+      </trkpt>
+      <trkpt lat="48.187141400" lon="11.863372084">
+        <ele>542.400</ele>
+        <time>2012-04-12T13:52:43Z</time>
+        <speed>6.389000</speed>
+      </trkpt>
+      <trkpt lat="48.187122289" lon="11.863070419">
+        <ele>542.400</ele>
+        <time>2012-04-12T13:52:47Z</time>
+        <speed>5.047000</speed>
+      </trkpt>
+      <trkpt lat="48.186960854" lon="11.861977419">
+        <ele>542.400</ele>
+        <time>2012-04-12T13:53:05Z</time>
+        <speed>6.500000</speed>
+      </trkpt>
+      <trkpt lat="48.186960015" lon="11.861270573">
+        <ele>541.200</ele>
+        <time>2012-04-12T13:53:13Z</time>
+        <speed>4.951000</speed>
+      </trkpt>
+      <trkpt lat="48.186945682" lon="11.861221204">
+        <ele>540.600</ele>
+        <time>2012-04-12T13:53:14Z</time>
+        <speed>4.097000</speed>
+      </trkpt>
+      <trkpt lat="48.186678048" lon="11.860932782">
+        <ele>540.200</ele>
+        <time>2012-04-12T13:53:23Z</time>
+        <speed>4.188000</speed>
+      </trkpt>
+      <trkpt lat="48.186668577" lon="11.860871762">
+        <ele>540.200</ele>
+        <time>2012-04-12T13:53:24Z</time>
+        <speed>4.243000</speed>
+      </trkpt>
+      <trkpt lat="48.186726077" lon="11.860760450">
+        <ele>540.200</ele>
+        <time>2012-04-12T13:53:26Z</time>
+        <speed>5.234000</speed>
+      </trkpt>
+      <trkpt lat="48.187475670" lon="11.860320903">
+        <ele>535.800</ele>
+        <time>2012-04-12T13:53:38Z</time>
+        <speed>6.961000</speed>
+      </trkpt>
+      <trkpt lat="48.187532164" lon="11.860205233">
+        <ele>535.800</ele>
+        <time>2012-04-12T13:53:40Z</time>
+        <speed>5.215000</speed>
+      </trkpt>
+      <trkpt lat="48.187396461" lon="11.859730566">
+        <ele>534.400</ele>
+        <time>2012-04-12T13:53:46Z</time>
+        <speed>6.156000</speed>
+      </trkpt>
+      <trkpt lat="48.187339548" lon="11.859684130">
+        <ele>533.600</ele>
+        <time>2012-04-12T13:53:47Z</time>
+        <speed>6.643000</speed>
+      </trkpt>
+      <trkpt lat="48.187173670" lon="11.859686393">
+        <ele>531.200</ele>
+        <time>2012-04-12T13:53:50Z</time>
+        <speed>5.861000</speed>
+      </trkpt>
+      <trkpt lat="48.187064705" lon="11.859621014">
+        <ele>531.200</ele>
+        <time>2012-04-12T13:53:53Z</time>
+        <speed>3.743000</speed>
+      </trkpt>
+      <trkpt lat="48.186969068" lon="11.859503584">
+        <ele>531.200</ele>
+        <time>2012-04-12T13:53:59Z</time>
+        <speed>1.853000</speed>
+      </trkpt>
+      <trkpt lat="48.186926655" lon="11.859408701">
+        <ele>531.200</ele>
+        <time>2012-04-12T13:54:02Z</time>
+        <speed>2.958000</speed>
+      </trkpt>
+      <trkpt lat="48.186870245" lon="11.859121704">
+        <ele>531.200</ele>
+        <time>2012-04-12T13:54:08Z</time>
+        <speed>3.912000</speed>
+      </trkpt>
+      <trkpt lat="48.186898911" lon="11.858547460">
+        <ele>529.400</ele>
+        <time>2012-04-12T13:54:17Z</time>
+        <speed>2.303000</speed>
+      </trkpt>
+      <trkpt lat="48.186895391" lon="11.858545868">
+        <ele>529.000</ele>
+        <time>2012-04-12T13:54:19Z</time>
+        <speed>0.000000</speed>
+      </trkpt>
+    </trkseg>
+  </trk>
+</gpx>
diff --git a/smplrout.cc b/smplrout.cc
index 1a4814f732771e5c0b0537912b9ec5bdcbb76d4b..405ab3da66db270420b42179d048b2fc81051277 100644 (file)
--- a/smplrout.cc
+++ b/smplrout.cc
@@ -76,7 +76,6 @@ void SimplifyRouteFilter::free_xte(struct xte* xte_rec)
   delete xte_rec->intermed;
 }
 
-#define HUGEVAL 2000000000
 
 void SimplifyRouteFilter::routesimple_waypt_pr(const Waypoint* wpt)
 {
@@ -101,24 +100,26 @@ void SimplifyRouteFilter::compute_xte(struct xte* xte_rec)
   double reslat, reslon;
   /* if no previous, this is an endpoint and must be preserved. */
   if (!xte_rec->intermed->prev) {
-    xte_rec->distance = HUGEVAL;
+    xte_rec->distance = kHugeValue;
     return;
   }
   const Waypoint* wpt1 = xte_rec->intermed->prev->wpt;
 
   /* if no next, this is an endpoint and must be preserved. */
   if (!xte_rec->intermed->next) {
-    xte_rec->distance = HUGEVAL;
+    xte_rec->distance = kHugeValue;
     return;
   }
   const Waypoint* wpt2 = xte_rec->intermed->next->wpt;
 
-  if (xteopt) {
+  switch (metric) {
+  case metric_t::crosstrack:
     xte_rec->distance = radtomiles(linedist(
                                      wpt1->latitude, wpt1->longitude,
                                      wpt2->latitude, wpt2->longitude,
                                      wpt3->latitude, wpt3->longitude));
-  } else if (lenopt) {
+    break;
+  case metric_t::length:
     xte_rec->distance = radtomiles(
                           gcdist(wpt1->latitude, wpt1->longitude,
                                  wpt3->latitude, wpt3->longitude) +
@@ -126,14 +127,15 @@ void SimplifyRouteFilter::compute_xte(struct xte* xte_rec)
                                  wpt2->latitude, wpt2->longitude) -
                           gcdist(wpt1->latitude, wpt1->longitude,
                                  wpt2->latitude, wpt2->longitude));
-  } else if (relopt) {
+    break;
+  case metric_t::relative:
     if (wpt3->hdop == 0) {
       fatal(MYNAME ": relative needs hdop information.\n");
     }
     // if timestamps exist, distance to interpolated point
     if (wpt1->GetCreationTime() != wpt2->GetCreationTime()) {
       double frac = (double)(wpt3->GetCreationTime().toTime_t() - wpt1->GetCreationTime().toTime_t()) /
-        (wpt2->GetCreationTime().toTime_t() - wpt1->GetCreationTime().toTime_t());
+                    (wpt2->GetCreationTime().toTime_t() - wpt1->GetCreationTime().toTime_t());
       linepart(wpt1->latitude, wpt1->longitude,
                wpt2->latitude, wpt2->longitude,
                frac, &reslat, &reslon);
@@ -149,7 +151,7 @@ void SimplifyRouteFilter::compute_xte(struct xte* xte_rec)
     // error relative to horizontal precision
     xte_rec->distance /= (6 * wpt3->hdop);
     // (hdop->meters following to J. Person at <http://www.developerfusion.co.uk/show/4652/3/>)
-
+    break;
   }
 }
 
@@ -158,14 +160,14 @@ int SimplifyRouteFilter::compare_xte(const void* a, const void* b)
   const auto* xte_a = static_cast<const struct xte*>(a);
   const auto* xte_b = static_cast<const struct xte*>(b);
 
-  if (HUGEVAL == xte_a->distance) {
-    if (HUGEVAL == xte_b->distance) {
+  if (kHugeValue == xte_a->distance) {
+    if (kHugeValue == xte_b->distance) {
       return 0;
     }
     return -1;
   }
 
-  if (HUGEVAL == xte_b->distance) {
+  if (kHugeValue == xte_b->distance) {
     return 1;
   }
 
@@ -197,7 +199,7 @@ void SimplifyRouteFilter::routesimple_head(const route_head* rte)
   totalerror = 0;
 
   /* short-circuit if we already have fewer than the max points */
-  if (countopt && count >= rte->rte_waypt_ct()) {
+  if ((limit_basis == limit_basis_t::count) && count >= rte->rte_waypt_ct()) {
     return;
   }
 
@@ -245,8 +247,12 @@ void SimplifyRouteFilter::routesimple_tail(const route_head* rte)
   auto compare_xte_lambda = [](const xte& a, const xte& b)->bool {
     return compare_xte(&a, &b) < 0;
   };
-  std::sort(xte_recs, xte_recs + xte_count, compare_xte_lambda);
-  
+  if (gpsbabel_testmode()) {
+    std::stable_sort(xte_recs, xte_recs + xte_count, compare_xte_lambda);
+  } else {
+    std::sort(xte_recs, xte_recs + xte_count, compare_xte_lambda);
+  }
+
 
   for (i = 0; i < xte_count; i++) {
     xte_recs[i].intermed->xte_rec = xte_recs+i;
@@ -261,19 +267,24 @@ void SimplifyRouteFilter::routesimple_tail(const route_head* rte)
   }
 
   /* while we still have too many records... */
-  while ((xte_count) && ((countopt && count < xte_count) || (erroropt && totalerror < error))) {
+  while ((xte_count) &&
+         (((limit_basis == limit_basis_t::count) && (count < xte_count)) ||
+          ((limit_basis == limit_basis_t::error) && (totalerror < error)))) {
     i = xte_count - 1;
     /* remove the record with the lowest XTE */
-    if (erroropt) {
-      if (xteopt || relopt) {
+    if (limit_basis == limit_basis_t::error) {
+      switch (metric) {
+      case metric_t::crosstrack:
+      case metric_t::relative:
         if (i > 1) {
           totalerror = xte_recs[i-1].distance;
         } else {
           totalerror = xte_recs[i].distance;
         }
-      }
-      if (lenopt) {
+        break;
+      case metric_t::length:
         totalerror += xte_recs[i].distance;
+        break;
       }
     }
     (*waypt_del_fnp)(const_cast<route_head*>(rte),
@@ -320,20 +331,29 @@ void SimplifyRouteFilter::init()
 {
   count = 0;
 
-  if (!!countopt == !!erroropt) {
+  if (!countopt && erroropt) {
+    limit_basis = limit_basis_t::error;
+  } else if (countopt && !erroropt) {
+    limit_basis = limit_basis_t::count;
+  } else {
     fatal(MYNAME ": You must specify either count or error, but not both.\n");
   }
-  if ((!!xteopt + !!lenopt + !!relopt) > 1) {
+
+  if (!lenopt && !relopt) {
+    metric = metric_t::crosstrack; /* default */
+  } else if (!xteopt && lenopt && !relopt) {
+    metric = metric_t::length;
+  } else if (!xteopt && !lenopt && relopt) {
+    metric = metric_t::relative;
+  } else {
     fatal(MYNAME ": You may specify only one of crosstrack, length, or relative.\n");
   }
-  if (!xteopt && !lenopt && !relopt) {
-    xteopt = (char*) "";
-  }
 
-  if (countopt) {
+  switch (limit_basis) {
+  case limit_basis_t::count:
     count = strtol(countopt, nullptr, 10);
-  }
-  if (erroropt) {
+    break;
+  case limit_basis_t::error: {
     int res = parse_distance(erroropt, &error, 1.0, MYNAME);
     if (res == 0) {
       error = 0;
@@ -341,6 +361,8 @@ void SimplifyRouteFilter::init()
       error = METERS_TO_MILES(error);
     }
   }
+  break;
+  }
 }
 
 #endif // FILTERS_ENABLED
diff --git a/smplrout.h b/smplrout.h
index 2386432ca3735f4a6470362a5e4d915140a1c58b..d847371d2d7dc662e5c8b46fa34d92d85e71e525 100644 (file)
--- a/smplrout.h
+++ b/smplrout.h
@@ -59,16 +59,21 @@
 #ifndef SMPLROUT_H_INCLUDED_
 #define SMPLROUT_H_INCLUDED_
 
-#include <QVector>         // for QVector
+#include <QString>   // for QString
+#include <QVector>   // for QVector
 
 #include "defs.h"    // for route_head (ptr only), Waypoint (ptr only), ARGT...
 #include "filter.h"  // for Filter
 
+
 #if FILTERS_ENABLED
 
 class SimplifyRouteFilter:public Filter
 {
 public:
+
+  /* Member Functions */
+
   QVector<arglist_t>* get_args() override
   {
     return &args;
@@ -78,16 +83,61 @@ public:
 
 private:
 
+  /* Types */
+
+  enum class limit_basis_t {count, error};
+  enum class metric_t {crosstrack, length, relative};
+
+  struct xte_intermed;
+
+  struct xte {
+    double distance{0.0};
+    struct xte_intermed* intermed {
+      nullptr
+    };
+  };
+
+  struct xte_intermed {
+    struct xte* xte_rec {
+      nullptr
+    };
+    struct xte_intermed* next {
+      nullptr
+    };
+    struct xte_intermed* prev {
+      nullptr
+    };
+    const Waypoint* wpt{nullptr};
+  };
+
+  /* Constants */
+
+  static constexpr double kHugeValue = 2000000000;
+
+  /* Member Functions */
+
+  static void free_xte(struct xte* xte_rec);
+  void routesimple_waypt_pr(const Waypoint* wpt);
+  void compute_xte(struct xte* xte_rec);
+  static int compare_xte(const void* a, const void* b);
+  void routesimple_head(const route_head* rte);
+  void shuffle_xte(struct xte* xte_rec);
+  void routesimple_tail(const route_head* rte);
+
+  /* Data Members */
+
   int count = 0;
   double totalerror = 0;
   double error = 0;
+  limit_basis_t limit_basis{limit_basis_t::error};
+  metric_t metric{metric_t::crosstrack};
 
   char* countopt = nullptr;
   char* erroropt = nullptr;
   char* xteopt = nullptr;
   char* lenopt = nullptr;
   char* relopt = nullptr;
-  void (*waypt_del_fnp)(route_head* rte, Waypoint* wpt){};
+  void (*waypt_del_fnp)(route_head* rte, Waypoint* wpt) {};
 
   QVector<arglist_t> args = {
     {
@@ -112,34 +162,10 @@ private:
     },
   };
 
-  struct xte_intermed;
-
-  struct xte {
-    double distance{0.0};
-    struct xte_intermed* intermed{nullptr};
-  };
-
-  struct xte_intermed {
-    struct xte* xte_rec{nullptr};
-    struct xte_intermed* next{nullptr};
-    struct xte_intermed* prev{nullptr};
-    const Waypoint* wpt{nullptr};
-  };
-
-  static void free_xte(struct xte* xte_rec);
-
   struct xte_intermed* tmpprev = nullptr;
   int xte_count = 0;
   const route_head* cur_rte = nullptr;
   struct xte* xte_recs = nullptr;
-
-  void routesimple_waypt_pr(const Waypoint* wpt);
-  void compute_xte(struct xte* xte_rec);
-  static int compare_xte(const void* a, const void* b);
-  void routesimple_head(const route_head* rte);
-  void shuffle_xte(struct xte* xte_rec);
-  void routesimple_tail(const route_head* rte);
-
 };
 
 #endif // FILTERS_ENABLED
diff --git a/testo.d/simplify.test b/testo.d/simplify.test
index 2539e44150a626d32f87607fd4c7e6ce22e139f5..7771702bba39a5a95dc6877a65e0698d7c384562 100644 (file)
--- a/testo.d/simplify.test
+++ b/testo.d/simplify.test
@@ -7,3 +7,19 @@ gpsbabel -r -i gpx -f ${REFERENCE}/route/route.gpx \
          -o arc -F ${TMPDIR}/simplify.txt
 compare ${REFERENCE}/simplify_output.txt ${TMPDIR}/simplify.txt
 
+gpsbabel -i gpx -f ${REFERENCE}/track/garmin-edge-800-output.gpx \
+         -x simplify,error=2m,crosstrack \
+         -o gpx -F ${TMPDIR}/simplify_error_crosstrack.gpx
+compare ${REFERENCE}/simplify_error_crosstrack.gpx ${TMPDIR}/simplify_error_crosstrack.gpx
+
+# verify the default matches crosstrack
+gpsbabel -i gpx -f ${REFERENCE}/track/garmin-edge-800-output.gpx \
+         -x simplify,error=2m \
+         -o gpx -F ${TMPDIR}/simplify_error.gpx
+compare ${REFERENCE}/simplify_error_crosstrack.gpx ${TMPDIR}/simplify_error.gpx
+
+gpsbabel -i gpx -f ${REFERENCE}/track/garmin-edge-800-output.gpx \
+         -x simplify,error=1000m,length \
+         -o gpx -F ${TMPDIR}/simplify_error_length.gpx
+compare ${REFERENCE}/simplify_error_length.gpx ${TMPDIR}/simplify_error_length.gpx
+
Unnamed repository; edit this file 'description' to name the repository.