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@@ -37,6 +37,8 @@ antipode_dist_km = math.pi * mean_earth_radius_km
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min_dist_km = 0.15 # if you're within 150m, you get a perfect score
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# if you're more than 1/4 of the Earth away, you get 0
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max_dist_km = antipode_dist_km / 2
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+# this has been tuned by hand based on the max dist to get a nice Gaussian
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+exp_denom = max_dist_km * max_dist_km / 4
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perfect_score = 5000
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@@ -55,5 +57,6 @@ def score(target, guess):
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if dist_km >= max_dist_km:
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return 0, dist_km
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- # TODO probably still needs tweaking
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- return int(perfect_score * (1 - ((dist_km - min_dist_km) / max_dist_km) ** 0.5)), dist_km
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+ # Gaussian, with some manual tuning to get good fall off
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+ exponent = -((dist_km - min_dist_km) ^ 2) / exp_denom
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+ return int(perfect_score * math.exp(exponent)), dist_km
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