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@t-karcher

t-karcher/scientific_notation.gd

Last active October 4, 2023 13:42
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GDScipt function converting a floating point number to a string in scientific notation
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scientific_notation.gd
func test_output():
print (get_scientific_notation(123456789.0, 0)) # 1e8
print (get_scientific_notation(123456789.0, 1)) # 1.2e8
print (get_scientific_notation(123456789.0)) # 1.2345678e8
print (get_scientific_notation(0.123456789, 0)) # 1e-1
print (get_scientific_notation(0.123456789, 1)) # 1.2e-1
print (get_scientific_notation(0.123456789)) # 1.2345678e-1
print (get_scientific_notation(12345, 0, true)) # 12e3
print (get_scientific_notation(1234567, 0, true)) # 1e6
print (get_scientific_notation(123456789, 0, true)) # 123e6
func get_scientific_notation(number: float, precision: int = 99, use_engineering_notation: bool = false) -> String:
var sign_ = sign(number)
number = abs(number)
if number < 1:
var exp_ = step_decimals(number)
if use_engineering_notation: exp_ = stepify(exp_ + 1, 3)
var coeff = sign_ * number * pow(10, exp_)
return String(stepify(coeff, pow(10, -precision))) + "e" + String(-exp_)
elif number >= 10:
var exp_ = String(number).split(".")[0].length() - 1
if use_engineering_notation: exp_ = stepify(exp_ - 1, 3)
var coeff = sign_ * number / pow(10, exp_)
return String(stepify(coeff, pow(10, -precision))) + "e" + String(exp_)
else:
return String(stepify(sign_ * number, pow(10, -precision))) + "e0"
@t-karcher
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Thanks! 👍 I hadn't even noticed yet that stepify has been renamed to snapped. I'll leave my code as it is, so whoever finds this page can choose between a working version for 3.x and 4.x. 😊

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