BatchNode now preserves the lineWidth for Line meshes when batching.

jme3-core/src/main/java/com/jme3/scene/BatchNode.java

@@ -444,6 +444,7 @@ public class BatchNode extends GeometryGroupNode {
         int maxWeights = -1;
 
         Mesh.Mode mode = null;
+        float lineWidth = 1f;
         for (Geometry geom : geometries) {
             totalVerts += geom.getVertexCount();
             totalTris += geom.getTriangleCount();
@@ -452,6 +453,7 @@ public class BatchNode extends GeometryGroupNode {
                 maxVertCount = geom.getVertexCount();
             }
             Mesh.Mode listMode;
+            float listLineWidth = 1f;
             int components;
             switch (geom.getMesh().getMode()) {
                 case Points:
@@ -462,6 +464,7 @@ public class BatchNode extends GeometryGroupNode {
                 case LineStrip:
                 case Lines:
                     listMode = Mesh.Mode.Lines;
+                    listLineWidth = geom.getMesh().getLineWidth();
                     components = 2;
                     break;
                 case TriangleFan:
@@ -493,11 +496,19 @@ public class BatchNode extends GeometryGroupNode {
                         + " primitive types: " + mode + " != " + listMode);
             }            
             mode = listMode;
+            if (mode == Mesh.Mode.Lines) {
+                if (lineWidth != 1f && listLineWidth != lineWidth) {
+                    throw new UnsupportedOperationException("When using Mesh Line mode, cannot combine meshes with different line width "
+                            + lineWidth + " != " + listLineWidth);
+                }
+                lineWidth = listLineWidth;
+            }
             compsForBuf[VertexBuffer.Type.Index.ordinal()] = components;
         }
 
         outMesh.setMaxNumWeights(maxWeights);
         outMesh.setMode(mode);
+        outMesh.setLineWidth(lineWidth);
         if (totalVerts >= 65536) {
             // make sure we create an UnsignedInt buffer so
             // we can fit all of the meshes