first .osm format import

- import osm convert it to Drawing and use it as resolved path.
- Not ready , first test over lab/valbonne_oct_2020.osm

java/org/artisanlogiciel/osm/convert/OsmToDrawing.java

@@ -0,0 +1,59 @@
+package org.artisanlogiciel.osm.convert;
+
+import org.artisanlogiciel.graphics.Drawing;
+import org.artisanlogiciel.graphics.DrawingLine;
+import org.artisanlogiciel.osm.Node;
+import org.artisanlogiciel.osm.NodeRef;
+import org.artisanlogiciel.osm.Way;
+
+import java.awt.*;
+import java.util.List;
+
+/**
+ * Take a way with resolved ref ( ie with NodeRef having non null getNode() )
+ * and create a Drawing from it.
+ */
+public class OsmToDrawing {
+
+    double refx = 0;
+    double refy = 0;
+    int mulx = 1;
+    int muly = 1;
+
+    public OsmToDrawing()
+    {
+
+    }
+
+    public OsmToDrawing(int mulx, int muly) {
+        this.mulx = mulx;
+        this.muly = muly;
+    }
+
+    public OsmToDrawing(double refx, double refy, int mulx, int muly) {
+        this.refx = refx;
+        this.refy = refy;
+        this.mulx = mulx;
+        this.muly = muly;
+    }
+
+    public DrawingLine getDrawingLine(Way way)
+    {
+        DrawingLine drawingLine = new DrawingLine();
+        for (NodeRef nr : way.getNdlist())
+        {
+            Node node = nr.getNode();
+            drawingLine.addPoint(new Point((int) ( (node.getLat() - refx)* mulx ) , (int) ( (node.getLon() - refy ) * muly) ));
+        }
+        return drawingLine;
+    }
+
+    public Drawing getDrawing(List<Way> ways)
+    {
+        Drawing drawing = new Drawing();
+        for (Way way : ways) {
+            drawing.addLine(getDrawingLine(way));
+        }
+        return drawing;
+    }
+}