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visual3d:documentation:pipeline:expressions:mathematical_operators

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visual3d:documentation:pipeline:expressions:mathematical_operators [2024/11/04 20:28] – wikisysopvisual3d:documentation:pipeline:expressions:mathematical_operators [2024/11/04 20:30] (current) – wikisysop
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 Note: Visual3D parses the mathematical operators before it parses the signal names. If you have a signal name that contains a mathematical operator (e.g. R-Foot1), Visual3D will probably not be able to parse the equation expression properly. Note: Visual3D parses the mathematical operators before it parses the signal names. If you have a signal name that contains a mathematical operator (e.g. R-Foot1), Visual3D will probably not be able to parse the equation expression properly.
  
-==== Arithmetic Operators ====+===== Arithmetic Operators =====
  
 Arithmetic operations can generally be performed using syntax that is similar to that found in a variety of programming and scripting languages. Arithmetic operations can generally be performed using syntax that is similar to that found in a variety of programming and scripting languages.
  
-=== Plus ===+==== Plus ====
  
 Addition is accomplished using the + character. An alternative syntax is **add(a,b)** where a and b are expressions that evaluate to numbers.  Addition is accomplished using the + character. An alternative syntax is **add(a,b)** where a and b are expressions that evaluate to numbers. 
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 </code> </code>
  
-=== Minus ===+==== Minus ====
  
 Subtraction is accomplished using the - character. Subtraction is accomplished using the - character.
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 </code> </code>
  
-=== Multiply ===+==== Multiply ====
  
 Multiplication is accomplished using the * character. Multiplication is accomplished using the * character.
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 </code> </code>
  
-=== Divide ===+==== Divide ====
  
 Division is accomplished using the / character. Division is accomplished using the / character.
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 </code> </code>
  
-=== Power ===+==== Power ====
  
 Exponentiation is accomplished using the ^ character. Exponentiation is accomplished using the ^ character.
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 </code> </code>
  
-==== Boolean Operators ====+===== Boolean Operators =====
  
 Boolean operators deal with boolean values, such as TRUE and FALSE. These are represented numerically as 1 (TRUE) and 0 (FALSE). Boolean operators deal with boolean values, such as TRUE and FALSE. These are represented numerically as 1 (TRUE) and 0 (FALSE).
  
-=== Logical OR ===+==== Logical OR ====
  
 The Logical OR operator is signified by the | character. It takes two boolean values as input and returns TRUE if either of the input values is TRUE. The Logical OR operator is signified by the | character. It takes two boolean values as input and returns TRUE if either of the input values is TRUE.
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 </code> </code>
  
-=== Logical AND ===+==== Logical AND ====
  
 The Logical AND operator is signified by the & character. It takes two boolean values as input and returns TRUE when both input values are TRUE. The Logical AND operator is signified by the & character. It takes two boolean values as input and returns TRUE when both input values are TRUE.
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 </code> </code>
  
-=== The Adjective NOT ===+==== The Adjective NOT ====
  
 The logical adjective NOT can be used with both the logical AND and logical OR operators. It takes one boolean value as input and negates that boolean value. The logical adjective NOT can be used with both the logical AND and logical OR operators. It takes one boolean value as input and negates that boolean value.
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 </code> </code>
  
-==Example==+===Example===
  
 Given a workspace containing 3 trials (*trial1.c3d, *trial2.c3d, and *trial3.c3d). Given a workspace containing 3 trials (*trial1.c3d, *trial2.c3d, and *trial3.c3d).
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 This command results in *trial2.c3d and *trial3.c3d being active. This command results in *trial2.c3d and *trial3.c3d being active.
  
-==== Comparison Operators ====+===== Comparison Operators =====
  
 Comparison operators take two inputs of the same type and return a boolean value. Comparison operators take two inputs of the same type and return a boolean value.
  
-=== Equals ===+==== Equals ====
  
 Equality is tested using either = or ==. It returns TRUE if the two inputs have the same value and FALSE if they do not. Equality is tested using either = or ==. It returns TRUE if the two inputs have the same value and FALSE if they do not.
  
-==Example==+===Example===
  
 Consider a model metric that is defined as a string and compare it to an explicitly defined string. Consider a model metric that is defined as a string and compare it to an explicitly defined string.
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 The text strings are equal, so the resulting signal contains a 1 (indicating TRUE). The text strings are equal, so the resulting signal contains a 1 (indicating TRUE).
  
-=== Not Equals ===+==== Not Equals ====
  
 Non-equality is tested using either <> or ><. Its behaviour is opposite that of equality. Non-equality is tested using either <> or ><. Its behaviour is opposite that of equality.
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 If (a==b) is TRUE then (a<>b) is FALSE. Similarly, if (a==b) is FALSE, then (a<>b) is TRUE. If (a==b) is TRUE then (a<>b) is FALSE. Similarly, if (a==b) is FALSE, then (a<>b) is TRUE.
  
-=== Less Than ===+==== Less Than ====
  
 We can test is one value is less than another using the < character. We can test is one value is less than another using the < character.
  
-==Example==+===Example===
  
 Given two signals TARGET::ORIGINAL::RFT1 and TARGET::ORIGINAL::LFT1, use the Boolean operator < to identify when the Z component of RFT1 is less than the Z component of LFT1. Given two signals TARGET::ORIGINAL::RFT1 and TARGET::ORIGINAL::LFT1, use the Boolean operator < to identify when the Z component of RFT1 is less than the Z component of LFT1.
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 The output signal will be 1 when RFT1::Z is less than LFT1::Z and 0 otherwise The output signal will be 1 when RFT1::Z is less than LFT1::Z and 0 otherwise
  
-==Example - Foot Clearance==+===Example - Foot Clearance===
  
 Heel and toe clearance are defined by two paths. It is possible to model "foot clearance" as the lower value of the heel and toe clearance values at each frame. Heel and toe clearance are defined by two paths. It is possible to model "foot clearance" as the lower value of the heel and toe clearance values at each frame.
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 {{:heel_toe_clearance2.jpg}} {{:heel_toe_clearance2.jpg}}
  
-=== Less Than Or Equals ===+==== Less Than Or Equals ====
  
 This boolean operator uses one of the following syntaxes: <= or =<. This boolean operator uses one of the following syntaxes: <= or =<.
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 The expression (a <= b) is equivalent logically to ((a < b) | (a == b)). The expression (a <= b) is equivalent logically to ((a < b) | (a == b)).
  
-==Example==+===Example===
  
 Given two signals TARGET::ORIGINAL::RFT1 and TARGET::ORIGINAL::LFT1, use the Boolean operator <= or the boolean operative =< to identify when the Z component of RFT1 is less than or equal to the Z component of LFT1. Given two signals TARGET::ORIGINAL::RFT1 and TARGET::ORIGINAL::LFT1, use the Boolean operator <= or the boolean operative =< to identify when the Z component of RFT1 is less than or equal to the Z component of LFT1.
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 The output signal will be 1 (indicating TRUE) when RFT1::Z is less than or equal to LFT1::Z and 0 (indicating FALSE) otherwise. The output signal will be 1 (indicating TRUE) when RFT1::Z is less than or equal to LFT1::Z and 0 (indicating FALSE) otherwise.
  
-=== Greater Than ===+==== Greater Than ====
  
 We can test is one value is less than another using the > character. We can test is one value is less than another using the > character.
  
-==Example==+===Example===
  
 Given two signals TARGET::ORIGINAL::RFT1 and TARGET::ORIGINAL::LFT1, use the Boolean operator > to identify when the Y component of RFT1 is greater than the Y component of LFT1. Given two signals TARGET::ORIGINAL::RFT1 and TARGET::ORIGINAL::LFT1, use the Boolean operator > to identify when the Y component of RFT1 is greater than the Y component of LFT1.
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 The output signal will be 1 (indicating TRUE) when RFT1::Y is greater than LFT1::Y and 0 (indicating FALSE) otherwise. The output signal will be 1 (indicating TRUE) when RFT1::Y is greater than LFT1::Y and 0 (indicating FALSE) otherwise.
  
-=== Greater Than Or Equals ===+==== Greater Than Or Equals ====
  
 This boolean operator uses one of the following syntaxes: >= or =>. This boolean operator uses one of the following syntaxes: >= or =>.
visual3d/documentation/pipeline/expressions/mathematical_operators.1730752116.txt.gz · Last modified: 2024/11/04 20:28 by wikisysop