e6e4eca188
- Integrated Lua 5.4 engine (32-bit mode for embedded ARM) - Created LuaGame wrapper class implementing Game interface - Added C++ bindings exposing renderer, game state, and input to Lua - Implemented SD card loader for automatic .lua game discovery - Updated GameLauncher to support std::function for lambda captures - Made Game class members public for Lua bindings access - Added example Lua games: counter, snake, bouncing ball - Included comprehensive API documentation Games can now be written as .lua text files on SD card and loaded without recompilation. Build size: 747KB UF2, Lua VM uses ~50-80KB RAM.
82 lines
2.7 KiB
Lua
82 lines
2.7 KiB
Lua
-- NAME: Bouncing Ball
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-- DESC: Physics demo with state management
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-- States
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local STATE_PAUSED = 0
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local STATE_RUNNING = 1
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function init()
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game.vars.state = STATE_PAUSED
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game.vars.ball_x = game.width() / 2
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game.vars.ball_y = game.height() / 2
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game.vars.vel_x = 3
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game.vars.vel_y = 2
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game.vars.radius = 10
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game.vars.frame_count = 0
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print("Bouncing Ball initialized")
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end
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function update(event)
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-- Toggle pause on tap
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if event.type == INPUT.TOUCH_DOWN or event.type == INPUT.BUTTON_0 or event.type == INPUT.BUTTON_1 then
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if game.vars.state == STATE_PAUSED then
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game.vars.state = STATE_RUNNING
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else
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game.vars.state = STATE_PAUSED
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end
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return true
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end
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-- Update physics if running
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if game.vars.state == STATE_RUNNING then
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-- Move ball
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game.vars.ball_x = game.vars.ball_x + game.vars.vel_x
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game.vars.ball_y = game.vars.ball_y + game.vars.vel_y
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-- Bounce off walls
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if game.vars.ball_x - game.vars.radius < 0 or game.vars.ball_x + game.vars.radius > game.width() then
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game.vars.vel_x = -game.vars.vel_x
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game.vars.ball_x = math.max(game.vars.radius, math.min(game.width() - game.vars.radius, game.vars.ball_x))
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end
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if game.vars.ball_y - game.vars.radius < 0 or game.vars.ball_y + game.vars.radius > game.height() then
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game.vars.vel_y = -game.vars.vel_y
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game.vars.ball_y = math.max(game.vars.radius, math.min(game.height() - game.vars.radius, game.vars.ball_y))
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end
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game.vars.frame_count = game.vars.frame_count + 1
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return true -- Always redraw when running
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end
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return false
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end
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function draw()
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renderer.clear(false)
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-- Draw ball
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renderer.circle(game.vars.ball_x, game.vars.ball_y, game.vars.radius, true, true)
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-- Draw trail (previous positions)
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local trail_radius = game.vars.radius - 2
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if trail_radius > 2 then
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renderer.circle(game.vars.ball_x - game.vars.vel_x,
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game.vars.ball_y - game.vars.vel_y,
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trail_radius, true, false)
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end
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-- Draw status
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if game.vars.state == STATE_PAUSED then
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renderer.text(10, 10, "PAUSED - Tap to start", true)
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else
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renderer.text(10, 10, "Frames: " .. tostring(game.vars.frame_count), true)
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renderer.text(10, 25, "Tap to pause", true)
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end
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-- Draw velocity vector
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local arrow_x = game.vars.ball_x + game.vars.vel_x * 3
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local arrow_y = game.vars.ball_y + game.vars.vel_y * 3
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renderer.line(game.vars.ball_x, game.vars.ball_y, arrow_x, arrow_y, true, 2)
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end
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