Merge pull request 'fix(tracer): Fixed first point of advanced flag incorrect calc order' (#254) from fix-tracer-advanced-flag-first-tick-calc into master

Reviewed-on: #254

BauSystem_Main/src/de/steamwar/bausystem/features/tracer/rendering/ViewFlag.java

@@ -34,6 +34,9 @@ import java.util.stream.Stream;
  * A settable flag that changes how a trace is rendered
  */
 public abstract class ViewFlag {
+    public static final Vector GRAVATY = new Vector(0.0, -0.04, 0.0);
+    public static final Vector DRAG_FACTOR = new Vector(0.98, 0.98, 0.98);
+
     /**
      * Static registry of static flags
      */
@@ -122,9 +125,8 @@ public abstract class ViewFlag {
                 if (prev.isEmpty()) continue;
 
                 TNTPoint previous = prev.get();
-                Vector previousVelocity = previous.getVelocity();
-
                 Location delta = representative.getLocation().clone().subtract(previous.getLocation());
+                Vector previousVelocity  = previous.isAfterFirstExplosion() ? previous.getVelocity() : delta.toVector().clone().divide(DRAG_FACTOR).subtract(GRAVATY);
 
                 Location yLocation = previous.getLocation().clone().add(0, delta.getY(), 0);
                 if (yLocation.distanceSquared(representative.getLocation()) >= 1.0 / 256.0 && yLocation.distanceSquared(previous.getLocation()) >= 1.0 / 256.0) {