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eyes:flowcontrol:condition [2018/01/16 10:45] sfiedle [Usage] |
eyes:flowcontrol:condition [2018/01/22 16:04] (current) sfiedle [Example] |
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| ===== Usage ===== | ===== Usage ===== | ||
| - | [[https://www.lua.org/manual/5.1/manual.html#2.5.2 | Relational operators from Lua]] are used to construct valid condition statements. All statements formulated with relational operators return true or false. The condition will not modify the I/O. It only passes the IO to either the true or false output stream.\\ | + | {{ :eyes:flowcontrol:conditionprop.png?nolink&600|}} |
| + | [[https://www.lua.org/manual/5.1/manual.html#2.5.2 | Relational operators from Lua]] are used to construct valid condition statements. All statements formulated with relational operators return true or false. The condition will not modify the I/O. It only passes the IO to either the then - true or else - false output stream.\\ | ||
| - | In order to verify a specification of an I/O it is necessary to formulate a conditional statement. | + | In order to verify a specification of an I/O it is necessary to formulate a conditional statement. |
| - | |< 100% 50% >| | + | |
| - | ^ ^ ^ | + | To compare a certain I/O header value it is possible to read this value by standard Lua scripting.\\ |
| - | |To compare a certain I/O header value it is possible to read this value by standard Lua scripting.\\ | + | |
| **cow.io[0]["image header value name"] == value** \\ | **cow.io[0]["image header value name"] == value** \\ | ||
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| A third option is to compare a header value of an I/O with a Variable.\\ | A third option is to compare a header value of an I/O with a Variable.\\ | ||
| - | **cow.VariableName < = cow.io[0]["image header value name"]** |{{ :eyes:flowcontrol:conditionprop.png?nolink| }} | | + | **cow.VariableName < = cow.io[0]["image header value name"]** |
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| ===== Example ==== | ===== Example ==== | ||
| - | {{ :eyes:flowcontrol:condition.png?nolink |}} | + | {{ :eyes:flowcontrol:condition.png?nolink800 |}} |
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| + | **Properties Window** | ||
| + | |< 100% 5% 40% >| | ||
| + | ^ ^ ^ ^ | ||
| + | |{{:eyes:flowcontrol:a.png?nolink&40|}}|{{:eyes:flowcontrol:conditionproperties.png?nolink|}}|The condition here in the example verifies the dimension of the I/O from the Import logic on the first position of the I/O. It checks whether the header key dimensionality is equal to three. In this case the condition is true and therefore the statement will pass the I/O to the logic Projection. The logic ran through and went green. The logic FourierProcesses is pending.| | ||
| ===== Parameters and I/O ===== | ===== Parameters and I/O ===== | ||