Improve Poi3DLayer:

- insert MIN_ZOOM
- support multiple models / multiple tags
- parameter RANDOM_TRANSFORM
- use ground scale

vtm-playground/src/org/oscim/test/gdx/poi3d/ModelHolder.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2018 Gustl22
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.oscim.test.gdx.poi3d;
+
+import com.badlogic.gdx.graphics.g3d.Model;
+
+class ModelHolder {
+    Model mModel;
+    String mPath;
+
+    ModelHolder(String path) {
+        mPath = path;
+    }
+
+    public Model getModel() {
+        return mModel;
+    }
+
+    public String getPath() {
+        return mPath;
+    }
+
+    public void setModel(Model model) {
+        mModel = model;
+    }
+}