Files
basic1/games/lua_examples/counter.lua
Adolfo Reyna b22170b62c Fix Lua game float-to-int conversion errors for renderer.circle()
All games had the same issue: renderer.circle() requires integer arguments,
but float calculations produced non-integer coordinates.

Fixed in all games using math.floor(x + 0.5) for proper rounding:
- pong.lua: Ball position
- air_hockey.lua: Puck position
- asteroids.lua: Asteroid positions
- ball.lua: Ball and trail positions, velocity line
- breakout.lua: Ball position
- flappy_bird.lua: Bird Y position
- counter.lua: Last touch marker position
- snake.lua: Food position (center calculation)
- tic_tac_toe.lua: O circle center position

Also fixed floating-point coordinate calculations in ball and line
drawing to ensure all coordinates are integers.
2026-02-12 20:51:26 -05:00

50 lines
1.5 KiB
Lua

-- NAME: Touch Counter
-- DESC: Simple tap counter demo
-- Initialize game state
function init()
game.vars.count = 0
game.vars.last_x = 0
game.vars.last_y = 0
print("Counter initialized")
end
-- Update game logic based on input
function update(event)
-- Check if touch/button pressed
if event.type == INPUT.TOUCH_DOWN or event.type == INPUT.BUTTON_0 or event.type == INPUT.BUTTON_1 then
game.vars.count = game.vars.count + 1
game.vars.last_x = event.x
game.vars.last_y = event.y
print("Count: " .. game.vars.count)
return true -- Request redraw
end
return false -- No redraw needed
end
-- Draw the game
function draw()
-- Clear screen
renderer.clear(true)
-- Draw title
renderer.text(20, 20, "Touch Counter", true)
-- Draw count (centered)
local count_text = "Count: " .. tostring(game.vars.count)
renderer.text(game.width() / 2 - 40, game.height() / 2 - 10, count_text, true)
-- Draw last touch position
if game.vars.count > 0 then
local pos_text = "Last: (" .. tostring(game.vars.last_x) .. ", " .. tostring(game.vars.last_y) .. ")"
renderer.text(20, game.height() - 30, pos_text, true)
-- Draw marker at last touch (convert to integers)
renderer.circle(math.floor(game.vars.last_x + 0.5), math.floor(game.vars.last_y + 0.5), 5, true, false)
end
-- Draw instructions
renderer.text(20, 50, "Tap screen to increment", true)
end