Change tilemap to dimension and simple generation

client/systems/rendering/dimension.ts

@@ -0,0 +1,37 @@
+import { get_sprite_region } from "$/common/utils.ts";
+import { Dimension } from "$/client/components/dimension.ts";
+import { TEXTURE_SIZE, TILE_SIZE } from "$/common/constants.ts";
+import { Camera, world_to_screen } from "$/client/components/camera.ts";
+
+export function render_dimension(ctx: CanvasRenderingContext2D, tilemap: Dimension, camera: Camera) {
+	ctx.save();
+
+	for (const tile of tilemap.tiles) {
+		const region = get_sprite_region(tile.id);
+
+		const x = tile.x * TILE_SIZE;
+		const y = tile.y * TILE_SIZE;
+
+		const screen_position = world_to_screen(x, y, camera, ctx.canvas.width, ctx.canvas.height);
+		if (
+			screen_position.x + TILE_SIZE < 0 || screen_position.x > ctx.canvas.width ||
+			screen_position.y + TILE_SIZE < 0 || screen_position.y > ctx.canvas.height
+		) {
+			continue;
+		}
+
+		ctx.drawImage(
+			tilemap.image,
+			region.x * TEXTURE_SIZE,
+			region.y * TEXTURE_SIZE,
+			TEXTURE_SIZE,
+			TEXTURE_SIZE,
+			x,
+			y,
+			TILE_SIZE,
+			TILE_SIZE,
+		);
+	}
+
+	ctx.restore();
+}