Difference between revisions of "love.math.colorToBytes"
(Created page with "{{newin|11.3|113|type=function}} Converts a color from 0..1 to 0..255 range. == Function == === Synopsis === <source lang="lua"> rb, gb, bb, ab = love.math.colorToBytes(...") |
m (Add clamp01 function) |
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Line 30: | Line 30: | ||
a = a ~= nil and floor(clamp01(a) * 255 + 0.5) or nil | a = a ~= nil and floor(clamp01(a) * 255 + 0.5) or nil | ||
return r, g, b, a | return r, g, b, a | ||
+ | end | ||
+ | </source> | ||
+ | Where <code>clamp01</code> is defined as follows | ||
+ | <source lang="lua"> | ||
+ | local function clamp01(x) | ||
+ | return math.min(math.max(x, 0), 1) | ||
end | end | ||
</source> | </source> |
Latest revision as of 02:25, 20 December 2018
Available since LÖVE 11.3 |
This function is not supported in earlier versions. |
Converts a color from 0..1 to 0..255 range.
Function
Synopsis
rb, gb, bb, ab = love.math.colorToBytes( r, g, b, a )
Arguments
number r
- Red color component.
number g
- Green color component.
number b
- Blue color component.
number a (nil)
- Alpha color component.
Returns
number rb
- Red color component in 0..255 range.
number gb
- Green color component in 0..255 range.
number bb
- Blue color component in 0..255 range.
number ab (nil)
- Alpha color component in 0..255 range or nil if alpha is not specified.
Notes
Here's implementation for 11.2 and earlier.
function love.math.colorToBytes(r, g, b, a)
if type(r) == "table" then
r, g, b, a = r[1], r[2], r[3], r[4]
end
r = floor(clamp01(r) * 255 + 0.5)
g = floor(clamp01(g) * 255 + 0.5)
b = floor(clamp01(b) * 255 + 0.5)
a = a ~= nil and floor(clamp01(a) * 255 + 0.5) or nil
return r, g, b, a
end
Where clamp01
is defined as follows
local function clamp01(x)
return math.min(math.max(x, 0), 1)
end
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