X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=org.simantics.district.maps%2Fsrc%2Forg%2Fsimantics%2Fmaps%2FMapScalingTransform.java;h=7a47777dfec4cfe238e8f51267921494dce93f08;hb=b018055e3c5809d33161154aebdc47f733721cdb;hp=f64a99f43c108e5931c822b10deb4c4d8f4fa99e;hpb=36d6d10e40cf262fd59ec67351f8e5d966af0fb6;p=simantics%2Fdistrict.git

diff --git a/org.simantics.district.maps/src/org/simantics/maps/MapScalingTransform.java b/org.simantics.district.maps/src/org/simantics/maps/MapScalingTransform.java
index f64a99f4..7a47777d 100644
--- a/org.simantics.district.maps/src/org/simantics/maps/MapScalingTransform.java
+++ b/org.simantics.district.maps/src/org/simantics/maps/MapScalingTransform.java
@@ -6,8 +6,9 @@ public class MapScalingTransform {
 
     private MapScalingTransform() {
     }
-
-    public static final AffineTransform INSTANCE = new AffineTransform(10000, 0, 0, 10000, 0, 0);
+    public static final double scale = 256.0d / 360.0d;
+    public static final AffineTransform INSTANCE = AffineTransform.getScaleInstance(scale, scale);
+    public static final AffineTransform INVERSE = AffineTransform.getScaleInstance(1/scale, 1/scale);
 
     public static double getScaleX() {
         return INSTANCE.getScaleX();
@@ -16,4 +17,15 @@ public class MapScalingTransform {
     public static double getScaleY() {
         return INSTANCE.getScaleY();
     }
+    
+    public static int zoomLevel(AffineTransform current) {
+        double org = INSTANCE.getScaleX();
+        double cur = current.getScaleX();
+        double f = cur / org;
+        double zoomLevel = Math.log10(f) / Math.log10(2);
+        if (zoomLevel < 0) {
+            zoomLevel = 0;
+        }
+        return (int) zoomLevel;
+    }
 }