fix asteroid polygon origin

-closes #30, but makes the shatter duplication issue much worse...

Author: 0XDE57

core/src/com/spaceproject/generation/EntityFactory.java

@@ -564,7 +564,6 @@ public static Entity createAsteroid(long seed, float x, float y, float velX, flo
         //shift vertices to be centered around 0,0 relatively
         Vector2 center = new Vector2();
         GeometryUtils.polygonCentroid(hull, 0, hull.length, center);
-        center.add(minX, minY);
         for (int index = 0; index < hull.length; index += 2) {
             hull[index] -= center.x;
             hull[index + 1] -= center.y;

core/src/com/spaceproject/systems/AsteroidShatterSystem.java

@@ -126,7 +126,17 @@ private void spawnChildAsteroid(Entity parentAsteroid, float[] vertices) {
                     vertices[p2], vertices[p2 + 1], // xy: 2, 3
                     vertices[p3], vertices[p3 + 1]  // xy: 4, 5
             };
-            GeometryUtils.ensureCCW(hull);
+            
+            //GeometryUtils.ensureCCW(hull);
+            
+            //shift vertices to be centered around 0,0 relatively
+            Vector2 center = new Vector2();
+            GeometryUtils.polygonCentroid(hull, 0, hull.length, center);
+            for (int j = 0; j < hull.length; j += 2) {
+                hull[j] -= center.x;
+                hull[j + 1] -= center.y;
+            }
+            
             float triangleQuality = GeometryUtils.triangleQuality(hull[0], hull[1], hull[2], hull[3], hull[4], hull[5]);
             //if (triangleQuality < 2.0f) {
             //todo: add new vertices to break in half