refactor viewport

types.h

@@ -60,11 +60,11 @@ enum ItemType {
     ITEM_TYPE_COUNT
 };
 
-template <>
+template<>
 struct std::formatter<ItemType> : std::formatter<string_view> {
     bool title_case = false;
 
-    constexpr auto parse(std::format_parse_context& ctx) {
+    constexpr auto parse(std::format_parse_context &ctx) {
         auto it = ctx.begin();
         if (it == ctx.end()) return it;
 
@@ -76,7 +76,7 @@ struct std::formatter<ItemType> : std::formatter<string_view> {
         return it;
     }
 
-    auto format(const ItemType& item_type, std::format_context& ctx) const {
+    auto format(const ItemType &item_type, std::format_context &ctx) const {
         std::string_view item_type_str;
         switch (item_type) {
             case TEARS_UP:
@@ -122,3 +122,33 @@ struct Item {
         assert(0 && "Unreachable.");
     }
 };
+
+struct Viewport {
+    Viewport() = default;
+
+    Viewport(const float screen_width, const float screen_height)
+        : screen_width(screen_width),
+          screen_height(screen_height),
+          padding(50),
+          level_width(screen_width - padding * 2),
+          level_height(screen_height - padding * 2),
+          level_left(padding),
+          level_top(padding),
+          level_right(level_width + padding),
+          level_bottom(level_height + padding) {
+    }
+
+    Viewport& operator=(const Viewport &other) = default;
+
+    float screen_width;
+    float screen_height;
+
+    float padding;
+
+    float level_width;
+    float level_height;
+    float level_left;
+    float level_top;
+    float level_right;
+    float level_bottom;
+};