require('strict')
local p = {}
--[=[
Input list of colors and weights
{{color = {r, g, b}, weight = n}, ...}
Output color
{r, g, b}
Also supports RGBA
]=]
function p.weighted_color_blend(args)
local total_weight = 0
local max_len = 0
for k, v in pairs(args) do
total_weight = total_weight + v.weight
if max_len < #(v['color']) then
max_len = #(v['color'])
end
end
if total_weight == 0 then
total_weight = 1
end
max_len = math.max(max_len, 3)
local blend = {}
for i = 1, max_len do
blend[i] = 0
for k, v in pairs(args) do
blend[i] = blend[i] + v['color'][i] * v['weight']/total_weight
end
end
return blend
end
p.colorData = {
-- base colors
[1] = {
name = 'red',
rgb = {226, 81, 52}
},
[2] = {
name = 'yellow',
rgb = {243, 205, 70}
},
[3] = {
name = 'blue',
rgb = {60, 124, 160}
},
[4] = {
name = 'orange',
rgb = {254, 166, 58}
},
[5] = {
name = 'green',
rgb = {123, 180, 135}
},
[6] = {
name = 'purple',
rgb = {183,97, 142}
},
[7] = {
name = 'deep blue',
rgb = {15, 87, 127}
},
[8] = {
name = 'rose lake',
rgb = {231, 86, 115}
},
[9] = {
name = 'lemon yellow',
rgb = {236, 214, 104}
},
[10] = {
name = 'vermilion',
rgb = {252, 120, 90}
},
[11] = {
name = 'gray',
rgb = {142, 136, 112}
},
[12] = {
name = 'black',
rgb = {0, 0, 0}
},
['w'] = {
name = 'white',
rgb = {235, 238, 238} -- work says the white used was zinc white - Approximated here --
}
}
local derived_colors = {
[13] = {{color = p['colorData'][1]['rgb'], weight = 1}, {color = p['colorData'][2]['rgb'], weight = 3}},
[14] = {{color = p['colorData'][1]['rgb'], weight = 1}, {color = p['colorData'][2]['rgb'], weight = 15}},
[15] = {{color = p['colorData'][1]['rgb'], weight = 1}, {color = p['colorData'][2]['rgb'], weight = 3}},
[16] = {{color = p['colorData'][1]['rgb'], weight = 1}, {color = p['colorData'][3]['rgb'], weight = 1}},
[17] = {{color = p['colorData'][1]['rgb'], weight = 5}, {color = p['colorData'][3]['rgb'], weight = 1}},
[18] = {{color = p['colorData'][1]['rgb'], weight = 15}, {color = p['colorData'][3]['rgb'], weight = 1}},
[19] = {{color = p['colorData'][1]['rgb'], weight = 1}, {color = p['colorData'][4]['rgb'], weight = 1}},
[20] = {{color = p['colorData'][1]['rgb'], weight = 1}, {color = p['colorData'][3]['rgb'], weight = 5}},
[24] = {{color = p['colorData'][1]['rgb'], weight = 1}, {color = p['colorData'][7]['rgb'], weight = 1}},
[38] = {{color = p['colorData'][2]['rgb'], weight = 1}, {color = p['colorData'][3]['rgb'], weight = 2}},
[40] = {{color = p['colorData'][2]['rgb'], weight = 1}, {color = p['colorData'][5]['rgb'], weight = 1}},
[45] = {{color = p['colorData'][2]['rgb'], weight = 1}, {color = p['colorData'][7]['rgb'], weight = 1}},
[46] = {{color = p['colorData'][2]['rgb'], weight = 30}, {color = p['colorData'][7]['rgb'], weight = 1}},
[47] = {{color = p['colorData'][2]['rgb'], weight = 100}, {color = p['colorData'][7]['rgb'], weight = 1}},
[48] = {{color = p['colorData'][2]['rgb'], weight = 1}, {color = p['colorData'][10]['rgb'], weight = 1}},
[51] = {{color = p['colorData'][2]['rgb'], weight = 3}, {color = p['colorData'][12]['rgb'], weight = 1}},
[55] = {{color = p['colorData'][3]['rgb'], weight = 1}, {color = p['colorData'][4]['rgb'], weight = 3}},
[59] = {{color = p['colorData'][3]['rgb'], weight = 1}, {color = p['colorData'][6]['rgb'], weight = 2}},
[65] = {{color = p['colorData'][3]['rgb'], weight = 1}, {color = p['colorData'][10]['rgb'], weight = 1}},
[68] = {{color = p['colorData'][3]['rgb'], weight = 1}, {color = p['colorData'][11]['rgb'], weight = 3}},
[71] = {{color = p['colorData'][4]['rgb'], weight = 2}, {color = p['colorData'][5]['rgb'], weight = 1}},
[75] = {{color = p['colorData'][4]['rgb'], weight = 5}, {color = p['colorData'][7]['rgb'], weight = 2}},
[76] = {{color = p['colorData'][4]['rgb'], weight = 1}, {color = p['colorData'][8]['rgb'], weight = 1}},
[83] = {{color = p['colorData'][5]['rgb'], weight = 3}, {color = p['colorData'][7]['rgb'], weight = 1}},
[84] = {{color = p['colorData'][5]['rgb'], weight = 1}, {color = p['colorData'][8]['rgb'], weight = 1}},
[85] = {{color = p['colorData'][5]['rgb'], weight = 1}, {color = p['colorData'][9]['rgb'], weight = 3}},
[88] = {{color = p['colorData'][5]['rgb'], weight = 1}, {color = p['colorData'][10]['rgb'], weight = 1}},
[89] = {{color = p['colorData'][5]['rgb'], weight = 1}, {color = p['colorData'][10]['rgb'], weight = 3}},
[93] = {{color = p['colorData'][6]['rgb'], weight = 3}, {color = p['colorData'][7]['rgb'], weight = 1}},
[94] = {{color = p['colorData'][6]['rgb'], weight = 1}, {color = p['colorData'][8]['rgb'], weight = 1}},
[101] = {{color = p['colorData'][7]['rgb'], weight = 1}, {color = p['colorData'][9]['rgb'], weight = 1}},
[105] = {{color = p['colorData'][7]['rgb'], weight = 1}, {color = p['colorData'][10]['rgb'], weight = 3}},
[110] = {{color = p['colorData'][7]['rgb'], weight = 5}, {color = p['colorData'][12]['rgb'], weight = 1}},
[118] = {{color = p['colorData'][9]['rgb'], weight = 2}, {color = p['colorData'][12]['rgb'], weight = 1}},
[122] = {{color = p['colorData'][10]['rgb'], weight = 1}, {color = p['colorData'][12]['rgb'], weight = 1}},
[149] = {{color = p['colorData'][10]['rgb'], weight = 1}, {color = p['colorData'][12]['rgb'], weight = 40}},
}
for color_key, color_components in pairs(derived_colors) do
p['colorData'][color_key] = {rgb = p.weighted_color_blend(color_components)}
end
return p
