Incorrectly set dirt/rock tiles

[blayzenw]

The way that the tiles are set makes rock tiles that a player can dig. The problem is with the updateAPIMap function in WGenerator.java. It does not set the 4 tiles around the vertice to dirt/grass when processing the type of tile.

The fix for this requires doing three passes when setting the surface tiles:
The first sets everything rock.
The second places 4 dirt tiles around each vertex (set all 9 vertices to dirt to tell wurm to not allow digging on any tile on the dirt border)
The third places bushes and trees so they don't get painted over by the dirt

This is the fixed code

    private void updateAPIMap() {
        MapData map = getAPI().getMapData();
        Random treeRand = new Random(System.currentTimeMillis());

        for (int i = 0; i < heightMap.getMapSize(); i++) {
            for (int j = 0; j < heightMap.getMapSize(); j++) {
                map.setSurfaceHeight(i, j, tileMap.getSurfaceHeight(i, j));
                map.setRockHeight(i, j, tileMap.getRockHeight(i, j));

                if (tileMap.hasOres())
                    map.setCaveTile(i, j, tileMap.getOreType(i, j), tileMap.getOreCount(i, j));

                map.setSurfaceTile(i, j, Tile.TILE_ROCK);
            }
        }
        for (int i = 0; i < heightMap.getMapSize(); i++) {
            for (int j = 0; j < heightMap.getMapSize(); j++) {
                if(tileMap.getType(i, j) != Tile.TILE_ROCK && !tileMap.getType(i, j).isTree() && !tileMap.getType(i, j).isBush()){
                    for(int x = i - 1; x < i + 1; x++)
                        for(int y = j - 1; y < j + 1; y++)
                            if(x > 0 && y > 0 && x < heightMap.getMapSize() && y <heightMap.getMapSize())
                                map.setSurfaceTile(x, y, tileMap.getType(i, j));
                }   
            }
        }
        for (int i = 0; i < heightMap.getMapSize(); i++) {
            for (int j = 0; j < heightMap.getMapSize(); j++) {
                if (tileMap.getType(i, j).isTree())
                    map.setTree(i, j, tileMap.getType(i, j).getTreeType((byte) 0), 
                            FoliageAge.values()[treeRand.nextInt(FoliageAge.values().length)], GrowthTreeStage.MEDIUM);
                else if (tileMap.getType(i, j).isBush())
                    map.setBush(i, j, tileMap.getType(i, j).getBushType((byte) 0), 
                            FoliageAge.values()[treeRand.nextInt(FoliageAge.values().length)], GrowthTreeStage.MEDIUM);
            }
        }
    }