Scale factor for short vertices calculation, fix #537

vtm/src/org/oscim/renderer/MapRenderer.java

@@ -1,6 +1,7 @@
 /*
  * Copyright 2012, 2013 Hannes Janetzek
  * Copyright 2016 Longri
+ * Copyright 2018 devemux86
  *
  * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
  *
@@ -17,6 +18,7 @@
  */
 package org.oscim.renderer;
 
+import org.oscim.backend.CanvasAdapter;
 import org.oscim.backend.GL;
 import org.oscim.backend.GLAdapter;
 import org.oscim.backend.canvas.Color;
@@ -75,6 +77,17 @@ public class MapRenderer {
         setBackgroundColor(Color.DKGRAY);
     }
 
+    /**
+     * Calculate scale factor for short vertices.
+     * <p>
+     * CanvasAdapter.dpi must be set before!
+     */
+    public static float calculateCoordScale() {
+        if (CanvasAdapter.dpi > 420)
+            return 4.0f;
+        return 8.0f;
+    }
+
     public static void setBackgroundColor(int color) {
         mClearColor = GLUtils.colorToFloat(color);
     }

vtm/src/org/oscim/utils/Parameters.java

@@ -21,6 +21,11 @@ public final class Parameters {
      */
     public static boolean ANIMATOR2 = false;
 
+    /**
+     * Allow custom scale factor for short vertices instead of the calculated one.
+     */
+    public static boolean CUSTOM_COORD_SCALE = false;
+
     /**
      * Allow custom tile size instead of the calculated one.
      */