View source for RGBToHSV

{{Useful Function}}
__NOTOC__
This function convert RGB to HSV color space

==Syntax==
<syntaxhighlight lang="lua">
string RGBToHSV ( int red, int green, int blue )
</syntaxhighlight>

===Required Arguments=== 
* '''red:''' The amount of [http://en.wikipedia.org/wiki/RGBA_color_space red] in the color (0-255).
* '''green:''' The amount of [http://en.wikipedia.org/wiki/RGBA_color_space green] in the color (0-255).
* '''blue:''' The amount of [http://en.wikipedia.org/wiki/RGBA_color_space blue] in the color (0-255).

===Returns===
Returns a hue, saturation and value of HSV color space

==Code==
<section name="Function source" class="both" show="true">
<syntaxhighlight lang="lua">
function RGBToHSV(r, g, b)
	local h, s, v
	local r = r / 255
	local g = g / 255
	local b = b / 255
	
	local maxColor = math.max(r, g, b)
	local minColor = math.min(r, g, b)
	
	local difference = maxColor - minColor
	
	if r == maxColor then
		h = (60 * ((g - b)/difference) + 360) % 360;
	elseif g == maxColor then
		h = (60 * ((b - r)/difference) + 120) % 360;
	elseif b == maxColor then
		h = (60 * ((r - g)/difference) + 240) % 360;
	else
		h = 0
	end
	
	if maxColor == 0 then
		s = 0
	else
		s = (difference/maxColor) * 100;
	end
	
	v = maxColor * 100;
	
	return math.ceil(h), math.floor(s), v
end
</syntaxhighlight>
</section>

Author: Olez14

==See Also==
{{Useful_Functions}}