Difference between revisions of "Square Root"
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Oblivion does '''not''' include a square root function. The [[:Category: Oblivion Script Extender|Oblivion Script Extender]] does - you can find out about it at [[SquareRoot]]. Without OBSE, you must use this code: | |||
This uses Newton-Raphson approximation, and gives accuracy to two decimal places for numbers less than or equal to 100. Adding more steps to it increases accuracy very quickly. | This uses Newton-Raphson approximation, and gives accuracy to two decimal places for numbers less than or equal to 100. Adding more steps to it increases accuracy very quickly. | ||
NOTE: For a check such as the distance between two points it's not required to actually take the square root. The Forumal of Pythagoras goes A^2 + B^2 = C^2, so instead of "if sqrt(X*X + Y*Y) == C" one can use "If (X*X + Y*Y) == (C*C)", where C is the distance you want to have checked. (For the mundane stuff GetDistance should work, but you may not always want to work in units) | |||
This is a [[:Category:Stage_Functions|Stage Function]], and as such must be created as a [[Quest Stages Tab|Quest Stage]] of a global script and called as a function. This assumes a [[Quest]] called Wiki with the variables declared. Therefore, you must modify this code to include the name of your [[Quest]] (assuming it is not Wiki, which it shouldn't be). Alternatively, however, it would not be difficult to incorporate this code into your script directly. | This is a [[:Category:Stage_Functions|Stage Function]], and as such must be created as a [[Quest Stages Tab|Quest Stage]] of a global script and called as a function. This assumes a [[Quest]] called Wiki with the variables declared. Therefore, you must modify this code to include the name of your [[Quest]] (assuming it is not Wiki, which it shouldn't be). Alternatively, however, it would not be difficult to incorporate this code into your script directly. | ||
The list of variables you will need declared in your [[Global Script]]: | The list of variables you will need declared in your [[Global Script]]: | ||
float input (the number whose root you need) | float input ;(the number whose root you need) | ||
float SqRt (the root, your answer) | float SqRt ;(the root, your answer) | ||
Your input variable need not necessarily be a float, it could be a short or long, but SqRt needs to be a float, as few square roots are integers. You are free to rename either, but remember to change the function code. | Your input variable need not necessarily be a float, it could be a short or long, but SqRt needs to be a float, as few square roots are integers. You are free to rename either, but remember to change the function code. | ||
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[[category: Stage Functions]] | [[category: Stage Functions]] | ||
[[category: | [[category: Math Functions (CS 1.0)]] | ||
Latest revision as of 20:18, 25 April 2010
Oblivion does not include a square root function. The Oblivion Script Extender does - you can find out about it at SquareRoot. Without OBSE, you must use this code:
This uses Newton-Raphson approximation, and gives accuracy to two decimal places for numbers less than or equal to 100. Adding more steps to it increases accuracy very quickly.
NOTE: For a check such as the distance between two points it's not required to actually take the square root. The Forumal of Pythagoras goes A^2 + B^2 = C^2, so instead of "if sqrt(X*X + Y*Y) == C" one can use "If (X*X + Y*Y) == (C*C)", where C is the distance you want to have checked. (For the mundane stuff GetDistance should work, but you may not always want to work in units)
This is a Stage Function, and as such must be created as a Quest Stage of a global script and called as a function. This assumes a Quest called Wiki with the variables declared. Therefore, you must modify this code to include the name of your Quest (assuming it is not Wiki, which it shouldn't be). Alternatively, however, it would not be difficult to incorporate this code into your script directly.
The list of variables you will need declared in your Global Script:
float input ;(the number whose root you need) float SqRt ;(the root, your answer)
Your input variable need not necessarily be a float, it could be a short or long, but SqRt needs to be a float, as few square roots are integers. You are free to rename either, but remember to change the function code.
;originally supplied by Galerion set Wiki.SqRt to input/2 set Wiki.SqRt to ( Wiki.SqRt + ( Wiki.input / Wiki.SqRt ) ) / 2 set Wiki.SqRt to ( Wiki.SqRt + ( Wiki.input / Wiki.SqRt ) ) / 2 set Wiki.SqRt to ( Wiki.SqRt + ( Wiki.input / Wiki.SqRt ) ) / 2 set Wiki.SqRt to ( Wiki.SqRt + ( Wiki.input / Wiki.SqRt ) ) / 2