Module:Sandbox/AlexNB/nmColor: Difference between revisions

Revision as of 22:28, 26 September 2014

Latest revision as of 23:15, 27 September 2014

(55 intermediate revisions by the same user not shown)

Line 73:

local widthYellow = maxYellow - minYellow

local minOrange = 580

local maxOrange = 645650 -- originally, it was 620

local widthOrange = maxOrange - minOrange

local minRed = 645650 -- originally, it was 620

local maxRed = 780 -- originally, it was 800

local widthRed = maxRed - minRed

Line 89:

wavelength_vis = (wavelength_abs - minOrange)*widthBlue/widthOrange + minBlue

elseif (wavelength_abs>minRed) and (wavelength_abs<=maxRed) then

wavelength_vis = (wavelength_abs - minRed)*widthGreen/(widthRed + 20) + minGreen

-- one of the "corrected" versions: wavelength_vis = (wavelength_abs - minRed - 30)*widthGreen/widthRed + minGreen

end

return wavelength_vis

end

local minAntiMagenta = 550

local maxAntiMagenta = 570

local function process_magenta(wavelength_abs)

local redvalue_RED

local bluevalue_RED

local greenvalue_RED

local redvalue_BLUE

local bluevalue_BLUE

local greenvalue_BLUE

local widthAntiMagenta = maxAntiMagenta - minAntiMagenta

local bias_BLUE = (wavelength_abs - minAntiMagenta)/widthAntiMagenta

local bias_RED = (maxAntiMagenta - wavelength_abs)/widthAntiMagenta

nm2RGB(700, false)

redvalue_RED = redvalue*bias_RED

bluevalue_RED = bluevalue*bias_RED

greenvalue_RED = greenvalue*bias_RED

nm2RGB(400, false)

redvalue_BLUE = redvalue*bias_BLUE

bluevalue_BLUE = bluevalue*bias_BLUE

greenvalue_BLUE = greenvalue*bias_BLUE

redvalue = 0.6+ 0.4*(redvalue_RED + redvalue_BLUE)

bluevalue = 0.7 + 0.3*(bluevalue_RED + bluevalue_BLUE)

greenvalue = greenvalue_RED + greenvalue_BLUE

end

Line 98 ⟶ 124:

-- this function returns the string "#RRGGBB" with approximate RGB value for a complementary color (reflection) to a color, defined as a wavelength passed as a first argument

local wavelength = tonumber(frame.args[1])

-- adding magentas to smoothen red->blue transition. Trying 540..570 nm

nm2RGB(absorption_to_visible(wavelength), false)

if (wavelength>=minAntiMagenta) and (wavelength<=maxAntiMagenta) then

process_magenta(wavelength)

else nm2RGB(absorption_to_visible(wavelength), false)

end

local result='#' .. string.format("%.2X%.2X%.2X", 255*redvalue, 255*greenvalue, 255*bluevalue)

return result