mirror of https://github.com/mgba-emu/mgba.git
45 lines
1.3 KiB
Lua
45 lines
1.3 KiB
Lua
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math.randomseed(os.time())
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local state = {}
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state.logo = image.load(script.dir .. "/logo.png")
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state.overlay = canvas:newLayer(state.logo.width, state.logo.height)
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state.overlay.image:drawImageOpaque(state.logo, 0, 0)
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state.x = math.random() * (canvas:screenWidth() - state.logo.width)
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state.y = math.random() * (canvas:screenHeight() - state.logo.height)
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state.direction = math.floor(math.random() * 3)
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state.speed = 0.5
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state.overlay:setPosition(math.floor(state.x), math.floor(state.y))
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state.overlay:update()
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function state.update()
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if state.direction & 1 == 1 then
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state.x = state.x + 1
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if state.x > canvas:screenWidth() - state.logo.width then
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state.x = (canvas:screenWidth() - state.logo.width) * 2 - state.x
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state.direction = state.direction ~ 1
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end
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else
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state.x = state.x - 1
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if state.x < 0 then
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state.x = -state.x
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state.direction = state.direction ~ 1
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end
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end
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if state.direction & 2 == 2 then
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state.y = state.y + 1
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if state.y > canvas:screenHeight() - state.logo.height then
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state.y = (canvas:screenHeight() - state.logo.height) * 2 - state.y
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state.direction = state.direction ~ 2
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end
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else
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state.y = state.y - 1
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if state.y < 0 then
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state.y = -state.y
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state.direction = state.direction ~ 2
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end
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end
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state.overlay:setPosition(math.floor(state.x), math.floor(state.y))
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end
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callbacks:add("frame", state.update)
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