Module:Sandbox/AlexNB/nmColor: Difference between revisions

Revision as of 21:18, 26 September 2014

Latest revision as of 23:15, 27 September 2014

(66 intermediate revisions by the same user not shown)

Line 28:

greenvalue = (645 - wavelength) / 65

bluevalue = 0

elseif (wavelength >= 645) and (wavelength <= 780) then

redvalue = 1

greenvalue = 0

Line 60:

-- code based on a color wheel drawn at: http://www2.chemistry.msu.edu/faculty/reusch/virttxtjml/spectrpy/uv-vis/spectrum.htm

local wavelength_vis

local minVioletIndigo = 380 -- originally, it was 400

local maxVioletIndigo = 430

local widthVioletIndigo = maxVioletIndigo - minVioletIndigo

Line 73:

local widthYellow = maxYellow - minYellow

local minOrange = 580

local maxOrange = 650 -- originally, it was 620

local widthOrange = maxOrange - minOrange

local minRed = 650 -- originally, it was 620

local maxRed = 780 -- originally, it was 800

local widthRed = maxRed - minRed

if (wavelength_abs>=minVioletIndigo) and (wavelength_abs<=maxVioletIndigo) then

wavelength_vis = (wavelength_abs - minVioletIndigo)*widthYellow/widthVioletIndigo + minYellow

elseif (wavelength_abs>minBlue) and (wavelength_abs<=maxBlue) then

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 redsum = 0redvalue_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(wlcycle700, false)

redvalue_RED = redvalue*bias_RED

bluevalue_RED = bluevalue*bias_RED

greenvalue_RED = greenvalue*bias_RED

-- nm2RGB(wavelength400, 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 97 ⟶ 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

-- if wlcycle < process_magenta(wavelength then)

else nm2RGB(absorption_to_visible(wavelength), false)

-- end

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

return result

end

function p.absorption_old(frame)

-- 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

-- The following formula is used for the complimentary color: {0xFF - RR, 0xFF - (RR + BB)/2, 0xFF - BB}

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

-- nm2RGB(wavelength)

-- local result='#' .. string.format("%.2X%.2X%.2X", 255*(1-redvalue), 255*(1-greenvalue), 255*(1-bluevalue))

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

local redsum = 0

local greensum = 0

local bluesum = 0

local intensityfactor = 0

local numofitems = 400

-- for wlcycle = 380,780,1 do

-- nm2RGB(wlcycle, false)

-- if wlcycle < wavelength then

-- intensityfactor = (wlcycle - 380) / (wavelength - 380)

-- else

-- intensityfactor = (wlcycle - wavelength) / (380 - wavelength) + 1

-- end

-- if intensityfactor < 0 then

-- intensityfactor = 0

-- numofitems = numofitems - 1

-- end

-- redsum = redsum + redvalue*intensityfactor*1.8

-- greensum = greensum + greenvalue*intensityfactor*1.5

-- bluesum = bluesum + bluevalue*intensityfactor*1

-- end

-- local result='#' .. string.format("%.2X%.2X%.2X", 255*(redsum/numofitems), 255*(greensum/numofitems), 255*(bluesum/numofitems))

nm2RGB(1160-wavelength, true)

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

return result

end

return p