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8 lines
381 B
Lua
8 lines
381 B
Lua
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function weather_mod.set_headwind(player, wind)
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local movement = vector.normalize(player:get_player_velocity())
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local product = vector.dot(movement, wind)
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-- logistic function, scales between 0.5 and 1.5
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-- see https://en.wikipedia.org/wiki/Logistic_function
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local factor = 1 / (1 + math.exp(-0.1 * (product - 0.5))) + 0.5
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weather_mod.add_physics(player, "speed", factor)
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end
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