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# raylib-jamstack: Raylib + MRuby + RmlUi with Ruby data binding.
Rl.init_window(720, 720, "raylib-jamstack: data binding")
Rl.target_fps = 60
Rml.init
Rml.load_font("game/ui/LatoLatin-Regular.ttf")
Rml.load_font("game/ui/LatoLatin-Bold.ttf")
ui = Rml::Context.new("main")
# --- game state ---
score = 0
hp = 3
x = 350
# --- data model: binds Ruby state to the RML view (must precede load_document) ---
model = ui.data_model("hud") do |m|
m.bind(:score) { score }
m.bind(:hp) { hp }
m.bind(:bar_width) { "#{(hp / 3.0 * 100).to_i}%" }
m.event(:reset) { score = 0 }
end
ui.load_document("game/ui/hud.rml").show
Rl.while_window_open do
ui.process_input
score += 1
hp -= 1 if Rl.key_pressed?(:h) && hp > 0
x += 200 * Rl.frame_time if Rl.key_down?(:d)
x -= 200 * Rl.frame_time if Rl.key_down?(:a)
# tell the view what changed this frame
model.dirty(:score, :hp, :bar_width)
Rl.draw(clear_color: Rl::BLACK) do
Rl.draw_text(text: "game layer: A/D move, H damage, click Reset",
x: 200, y: 410, font_size: 16, color: Rl::GRAY)
Rl.draw_text(text: "@", x: x.to_i, y: 300, font_size: 40, color: Rl::RED)
ui.update
ui.render
end
end
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