working json to sprite conversion

1 files changed, 42 insertions, 0 deletions

diff --git a/app/helpers/00_tileset.rb b/app/helpers/00_tileset.rb
new file mode 100644
index 0000000..d6e6cf3
--- /dev/null
+++ b/app/helpers/00_tileset.rb
@@ -0,0 +1,42 @@
+class Helper
+  # Returns a loaded map and its dependecies(images,json)
+  # If any are missing then it will load them from files
+
+  @json_data = {}
+  class <<self
+    attr_accessor :json_data
+
+    def get_json_tiles(json_name)
+      if self.json_data[json_name].nil?
+        self.json_data[json_name] = $gtk.parse_json_file "assets/json/#{json_name}.json"
+        raise Exception.new "#{json_name} is null and not loaded. Cannot get json tile" if self.json_data[json_name].nil?
+
+        #puts self.json_data[json_name].inspect
+        #puts json_name
+        if self.json_data[json_name]['type'] == 'map' #json_name.split("_").first == 'map'
+          self.json_data[json_name]['tilesets'].each do |tileset|
+            tileset = Helper.get_json_tiles(tileset['source'].split('/').last.delete_suffix('.tsx'))
+            # download tileset here
+            # $gtk.args.gtk.http_get 'https://mysite.net/#{tileset['name']}.png'
+          end
+        end
+      end
+      self.json_data[json_name]
+    end
+
+    def get_tile(json_name:, tile_index:)
+      json_tiles = self.get_json_tiles(json_name)
+      return puts "Error, json file not a tileset" unless json_tiles['type'] == 'tileset'
+      return tile_index - json_tiles['tilecount'] if tile_index > json_tiles['tilecount']
+      source_height_tiles = (tile_index.to_i / json_tiles['columns'].to_i).to_i# * json_tiles['tileheight']
+      { w: json_tiles['tilewidth'],
+        h: json_tiles['tileheight'],
+        path: json_tiles['image'].split('mygame/').last.delete('\\'),
+        source_x: ((tile_index % json_tiles['columns']) - 1) * json_tiles['tilewidth'],
+        # source_y gets special treatment
+        source_y: json_tiles['imageheight'] - ((source_height_tiles + 1) * json_tiles['tileheight']),
+        source_w: json_tiles['tilewidth'],
+        source_h: json_tiles['tileheight'] }
+    end
+  end
+end