PointsToShot.java: better handles error when parsing trajectory file.

AMAPVox/AMAPVoxCore/src/main/java/fr/amap/lidar/amapvox/voxelisation/als/PointsToShot.java

@@ -69,7 +69,7 @@ public class PointsToShot extends Process implements IterableWithException<Shot>
     }
 
     public void init() throws Exception {
-        
+
         // read LAS / LAZ points
         lasPoints = readALSPoints(inputFile);
 
@@ -210,11 +210,25 @@ public class PointsToShot extends Process implements IterableWithException<Shot>
         while ((line = reader.readLine()) != null) {
             fireProgress("Reading trajectory file " + file.getName(), count++, nPoint);
             String[] lineSplit = line.split(file.getColumnSeparator());
-            points.add(new TrajectoryPoint(
-                    Double.valueOf(lineSplit[eastingIndex]),
-                    Double.valueOf(lineSplit[northingIndex]),
-                    Double.valueOf(lineSplit[elevationIndex]),
-                    Double.valueOf(lineSplit[timeIndex])));
+            if (lineSplit.length < 4) {
+                StringBuilder msg = new StringBuilder();
+                msg.append("Line ").append(count).append(" from trajectory file has less than four columns. The point is discarded.");
+                msg.append('\n').append(line);
+                LOGGER.warn(msg);
+                continue;
+            }
+            try {
+                double easting = Double.valueOf(lineSplit[eastingIndex]);
+                double northing = Double.valueOf(lineSplit[northingIndex]);
+                double elevation = Double.valueOf(lineSplit[elevationIndex]);
+                double time = Double.valueOf(lineSplit[timeIndex]);
+                points.add(new TrajectoryPoint(easting, northing, elevation, time));
+            } catch (NumberFormatException ex) {
+                StringBuilder msg = new StringBuilder();
+                msg.append("Failed to parse line ").append(count).append(" from trajectory file (number format error). The point is discarded.");
+                msg.append('\n').append(line);
+                LOGGER.warn(msg);
+            }
         }
 
         LOGGER.info("Sorting and trimming trajectory points");
@@ -243,7 +257,7 @@ public class PointsToShot extends Process implements IterableWithException<Shot>
             // shot origin, apply transformation
             Point3d origin = findOrigin(lasPoint);
             vopMatrix.transform(origin);
-            
+
             // shot direction
             Vector3d direction = new Vector3d(point);
             direction.sub(origin);
@@ -406,7 +420,7 @@ public class PointsToShot extends Process implements IterableWithException<Shot>
         // check collinearity
         return Math.abs(1.d - Math.abs(AB.dot(AC))) < epsilon;
     }
-    
+
     private Point3d toPoint3d(LasPoint point) {
         return new Point3d(point.x, point.y, point.z);
     }