From 01fbd54df87813b43c96a33c97af76556b84cb54 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Thu, 19 Jul 2012 15:14:17 +0100
Subject: objectified

---
 gpsviewer.pde | 159 ++++++++++++++++++++++++++++++++++++----------------------
 1 file changed, 98 insertions(+), 61 deletions(-)

diff --git a/gpsviewer.pde b/gpsviewer.pde
index 715c79f..b2a0686 100644
--- a/gpsviewer.pde
+++ b/gpsviewer.pde
@@ -1,87 +1,124 @@
-XMLElement kml;
-ArrayList points = new ArrayList();
+p3d max=new p3d(-1000,-1000,-1000,"");
+p3d min=new p3d(1000,1000,1000,"");
+
+float xOffset,yOffset,spanDegrees,pixelsPerDegree;
+
+trace pts1,pts2;
 
 class p3d {
   float x,y,z;
-  p3d(float _x,float _y,float _z) {
+  String time;
+  p3d(float _x,float _y,float _z,String _t) {
     x=_x;
     y=_y;
     z=_z;
   }
 }
 
-p3d max=new p3d(-1000,-1000,-1000);
-p3d min=new p3d(1000,1000,1000);
-
-float xOffset,yOffset,spanDegrees;
-
-void addPoint(String[] coord) {
-  p3d p;
-  if (coord.length>2) {
-    p=new p3d(float(coord[0]),float(coord[1]),float(coord[2]));
-  }      
-  else p=new p3d(float(coord[0]),float(coord[1]),0.0);
-  points.add(p);
-  if (p.x>max.x) max.x=p.x;
-  if (p.y>max.y) max.y=p.y;
-  if (p.z>max.z) max.z=p.z;
-  if (p.x<min.x) min.x=p.x;
-  if (p.y<min.y) min.y=p.y;
-  if (p.z<min.z) min.z=p.z;
-}
-
-void setup() {
-  size(512,512);
-  kml = new XMLElement(this, "tim-openpaths.kml").getChild("Document");
-  //kml = new XMLElement(this, "everytrip-demo.kml").getChild("Document");
-  int num = kml.getChildCount();
-  for (int i = 0; i < num; i++) {
-    if (kml.getChild(i).getName().equals("Placemark")) {
-      if (kml.getChild(i).getChildren("Point").length>0) { //element contains a single coordinate
-        addPoint(kml.getChild(i).getChild("Point").getChild("coordinates").getContent().split(","));
+class trace {
+  ArrayList points = new ArrayList();
+  PApplet parent;
+  trace(PApplet _this,String filename) {
+    parent=_this;
+    parseXml(filename);
+  }
+  void addPoint(float _x,float _y,float _z,String _t) {
+    p3d p=new p3d(_x,_y,_z,_t);
+    points.add(p);
+    if (p.x>max.x) max.x=p.x;
+    if (p.y>max.y) max.y=p.y;
+    if (p.z>max.z) max.z=p.z;
+    if (p.x<min.x) min.x=p.x;
+    if (p.y<min.y) min.y=p.y;
+    if (p.z<min.z) min.z=p.z;
+  }
+  void draw() {
+    for (int i=0;i<points.size()-1;i++) {
+        float x1=((((p3d)points.get(i)).x-min.x)*pixelsPerDegree)+xOffset;
+        float y1=(height-((((p3d)points.get(i)).y-min.y)*pixelsPerDegree))-yOffset;
+        float x2=((((p3d)points.get(i+1)).x-min.x)*pixelsPerDegree)+xOffset;
+        float y2=(height-((((p3d)points.get(i+1)).y-min.y)*pixelsPerDegree))-yOffset;
+        line(x1,y1,x2,y2);
       }
-      if (kml.getChild(i).getChildren("coordinates").length>0) { //element contains a table of coordinates
-        String[] coords=kml.getChild(i).getChild("coordinates").getContent().split("\\n");
-        for (int j=0;j<coords.length;j++) {
-          addPoint(coords[j].split(","));
+    }
+    void parseXml(String _file) {
+      ArrayList pts = new ArrayList();
+        //XMLElement gpx = new XMLElement(this, "2012-07-18 11-25-38-gpstrack.gpx");
+      XMLElement gpx = new XMLElement(parent, _file);
+      //read all the tracks
+      int trks = gpx.getChildCount();
+      for (int i = 0; i < trks; i++) {
+        XMLElement trk=gpx.getChild(i);
+         println("trk children: "+str(trk.getChildCount())+": "+trk.getChild(0).getName());
+        if (trk.getName().equals("trk")) {
+          //read all the tracksegs;
+          int trkseqs = trk.getChildCount();
+          for (int j = 0; j < trkseqs; j++) {
+            XMLElement trkseq=trk.getChild(j);
+            if (trkseq.getName().equals("trkseg")) {
+              //read all the trackpts;
+              int trkpts = trkseq.getChildCount();
+              for (int k = 0; k < trkpts; k++) {
+                XMLElement trkpt=trkseq.getChild(k);
+                if (trkpt.getName().equals("trkpt")) {
+                  float lat=trkpt.getFloat("lat");
+                  float lng=trkpt.getFloat("lon");
+                  float elev=0.0;
+                  String time="";
+                  int trkptchildren = trkpt.getChildCount();
+                  for (int l = 0; l < trkptchildren; l++) {
+                    if (trkpt.getChild(l).getName().equals("ele")) {
+                      elev=Float.parseFloat(trkpt.getChild(l).getContent());
+                    }
+                    if (trkpt.getChild(l).getName().equals("time")) {
+                      time=trkpt.getChild(l).getContent();
+                    }
+                  }
+                  addPoint(lng,lat,elev,time);
+                }
+              }
+            }
+          }
         }
       }
+    //work out offsets
+    if (max.x-min.x>max.y-min.y) {
+      //scale to X
+      xOffset=0;
+      yOffset=(height/2)-((height*((max.y-min.y)/(max.x-min.x))*0.5)); //
     }
+    else {
+      //scale to Y
+      xOffset=(width/2)-((width*((max.x-min.x)/(max.y-min.y))*0.5));
+      println("ratio: "+str((max.x-min.x)/(max.y-min.y)));
+      yOffset=0;
+    }
+    println (_file+" "+str(pts.size())+" data points, bounds: "+str(min.x)+","+str(min.y)+" to "+str(max.x)+","+str(max.y));
   }
-  println ("found "+str(points.size())+" data points");
-  
-  //work out offsets
-  if (max.x-min.x>max.y-min.y) {
-    //scale to X
-    xOffset=0;
-    yOffset=(height/2)-((height*((max.y-min.y)/(max.x-min.x))*0.5)); //
-  }
-  else {
-    //scale to Y
-    xOffset=(width/2)-((width*((max.x-min.x)/(max.y-min.y))*0.5));
-    println("ratio: "+str((max.x-min.x)/(max.y-min.y)));
-    yOffset=0;
-  }
+}
+
+void setup() {
+  size(512,512);
   
+  pts1 = new trace(this,"2012-07-18 11-25-38-gpstrack.gpx");
+  pts2 = new trace(this,"1667831-gpstrack.gpx");
   
   background(0);
   stroke(255);
+  
+  spanDegrees=max(max.x-min.x,max.y-min.y);
+  if (max.x-min.x>max.y-min.y) pixelsPerDegree=width/spanDegrees; //maximum span of latitude/longitude
+  else pixelsPerDegree=height/spanDegrees; 
 }
 
 void draw() {
-  spanDegrees=max(max.x-min.x,max.y-min.y); 
   if (spanDegrees==0.0) println("no movement!");
   else {
-    float pixelsPerDegree;
-    if (max.x-min.x>max.y-min.y) pixelsPerDegree=width/spanDegrees; //maximum span of latitude/longitude
-    else pixelsPerDegree=height/spanDegrees;
-    for (int i=0;i<points.size()-1;i++) {
-      float x1=((((p3d)points.get(i)).x-min.x)*pixelsPerDegree)+xOffset;
-      float y1=(height-((((p3d)points.get(i)).y-min.y)*pixelsPerDegree))-yOffset;
-      float x2=((((p3d)points.get(i+1)).x-min.x)*pixelsPerDegree)+xOffset;
-      float y2=(height-((((p3d)points.get(i+1)).y-min.y)*pixelsPerDegree))-yOffset;
-      line(x1,y1,x2,y2);
-    }
+    stroke(255,255,0);
+    pts1.draw();
+    stroke(255,128,128);
+    pts2.draw();
   }
   noLoop();
+  saveFrame();
 }
-- 
cgit v1.2.3