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GrayScale ( color )

Returns the given color turned to grey as compound RGB color

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Theo Ros - Show more from this author

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/* -------------------------------------------------------------------------- Returns the given color turned to grey as compound RGB color. This function calculates the value as 'TRUE' (Photographic) gray In: color - the compound color to calculate the greyscale from GrayScale ( RGB ( 64 ; 92 ; 128 ) ) --> 5789784 Note: Calculations in this formula are in Dutch numberformat (decimal COMMA). Change this if your regional settings use decimal POINTS. Theo Ros -------------------------------------------------------------------------- */ Let ( [ red = Div ( color ; 65536 ) ; green = Div ( Mod ( color ; 65536 ) ; 256 ) ; blue = Mod ( color ; 256 ) ; gray = Int ( red * ,222 + green * ,707 + blue * ,071 ) ] ; RGB ( gray ; gray ; gray ) ) Click to copy

Returns the given color turned to grey as compound RGB color.
This function calculates the value as 'TRUE' (Photographic) gray

In: color - the compound color to calculate the greyscale from

GrayScale ( RGB ( 64 ; 92 ; 128 ) ) --> 5789784

Note: Calculations in this formula are in Dutch numberformat (decimal COMMA). Change this if your regional settings use decimal POINTS.

Theo Ros

 

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