add TileMeshCollection/Loader support for MultiModelTileMesh

src/com/blarg/gdx/tilemap3d/tilemesh/TileMeshCollection.java

@@ -49,6 +49,28 @@ public class TileMeshCollection {
 		return addMesh(tileMesh);
 	}
 
+	public int add(
+			Model[] models,
+			Color[] modelColors,
+			Vector3[] scaleModelsToSizes,
+			Vector3[] modelPositionOffsets,
+			Model collisionModel,
+			MaterialTileMapping textures,
+			byte opaqueSides,
+			byte lightValue,
+			boolean alpha,
+			float translucency,
+			Color color,
+			Vector3 scaleToSize,
+			Vector3 positionOffset,
+			Vector3 collisionPositionOffset
+	) {
+		MultiModelTileMesh tileMesh = new MultiModelTileMesh(
+				models, modelColors, scaleModelsToSizes, modelPositionOffsets, collisionModel, textures, opaqueSides, lightValue, alpha, translucency, color, scaleToSize, positionOffset, collisionPositionOffset
+		);
+		return addMesh(tileMesh);
+	}
+
 	public int addCube(
 			TextureRegion topTexture,
 			TextureRegion bottomTexture,

src/com/blarg/gdx/tilemap3d/tilemesh/TileMeshCollectionLoader.java

@@ -171,6 +171,48 @@ public final class TileMeshCollectionLoader {
 				}
 
 				collection.add(model, collisionModel, materialMapping, opaqueSides, lightValue, alpha, translucency, color, scaleToSize, positionOffset, collisionPositionOffset);
+
+			} else if (tileDef.models != null) {
+				int numModels = tileDef.models.size();
+				Model[] submodels = new Model[numModels];
+				Color[] colors = new Color[numModels];
+				Vector3[] scaleToSizes = new Vector3[numModels];
+				Vector3[] positionOffsets = new Vector3[numModels];
+
+				for (int j = 0; j < numModels; ++j) {
+					JsonTileSubModels subModelDef = tileDef.models.get(j);
+
+					submodels[j] = models.get(subModelDef.submodel);
+					if (model == null) {
+						submodels[j] = loader.loadModel(Gdx.files.internal(subModelDef.submodel));
+						models.put(subModelDef.submodel, submodels[j]);
+					}
+
+					if (subModelDef.color == null)
+						colors[j] = new Color(Color.WHITE);
+					else
+						colors[j] = new Color(subModelDef.color);
+
+					scaleToSizes[j] = subModelDef.scaleToSize;
+					positionOffsets[j] = subModelDef.positionOffset;
+				}
+
+				collisionModel = null;
+
+				if (tileDef.collisionModel != null) {
+					//override with a specific collision model
+					collisionModel = models.get(tileDef.collisionModel);
+					if (collisionModel == null) {
+						collisionModel = loader.loadModel(Gdx.files.internal(tileDef.collisionModel));
+						models.put(tileDef.collisionModel, collisionModel);
+					}
+				}
+				if (tileDef.collisionShape != null) {
+					collisionModel = null;   // using a shape instead!
+					throw new NotImplementedException();
+				}
+
+				collection.add(submodels, colors, scaleToSizes, positionOffsets, collisionModel, materialMapping, opaqueSides, lightValue, alpha, translucency, color, scaleToSize, positionOffset, collisionPositionOffset);
 			}
 		}