1 files changed, 54 insertions, 0 deletions
diff --git a/src/context.zig b/src/context.zig
new file mode 100644
index 0000000..f3e88f2
--- /dev/null
+++ b/src/context.zig
@@ -0,0 +1,54 @@
+const std = @import("std");
+const rl = @cImport(@cInclude("raylib.h"));
+const root = @import("root.zig");
+
+pub var camera: rl.Camera2D = undefined;
+pub var grid: []root.MyRect = undefined;
+
+pub const Grid = struct {
+    buffer: std.MultiArrayList(root.Hex),
+    cursor: usize,
+    size: usize,
+    const Self = @This();
+
+    const GridError = error{
+        OutOfBounds,
+    };
+
+    //TODO think about what size really means
+    pub fn init(
+        allocator: std.mem.Allocator,
+        size: usize,
+    ) !Grid {
+        var buffer: std.MultiArrayList(root.Hex) = .{};
+        try buffer.ensureTotalCapacity(allocator, size * size);
+        return .{
+            .buffer = buffer,
+            .cursor = 0,
+            .size = size,
+        };
+    }
+
+    // should only be used when standing up the buffer, afterwards should use q, r indexing
+    pub fn initPush(self: *Self, hex: root.Hex) GridError!void {
+        if (self.cursor >= self.size * 2) {
+            return GridError.OutOfBounds;
+        }
+        self.buffer.insertAssumeCapacity(self.cursor, hex);
+    }
+
+    pub fn set(self: *Self, hex: root.Hex) GridError!void {
+        const idx = hex.qr[1] * self.size + hex.qr[0];
+        if (idx >= self.size * 2) {
+            return GridError.OutOfBounds;
+        }
+
+        self.buffer.set(idx, hex);
+    }
+};
+pub var hex_grid: Grid = undefined;
+pub var hovered_coords: root.HexCoord = root.HexCoord{ .q = 0, .r = 0 };
+pub var hovered_handle: ?usize = null;
+
+var Gpa = std.heap.GeneralPurposeAllocator(.{}){};
+pub var gpa: std.mem.Allocator = Gpa.allocator();