Rgb

From codeTank

Contents 1 Description 2 Arguments 3 Returns 4 Example 5 See Also

Description

rgb creates tables that holds color information. It is primarily used to specify color for paint or image functions.

Arguments

rgb() -- equivalent to rgb(0, 0, 0)
rgb(red) -- equivalent to rgb(red, 0, 0)
rgb(red, green) -- equivalent to rgb(red, green, 0)
rgb(red, green, blue)

There are three optional arguments for rgb. Each argument specifies an amount of intensity per color channel. The three color channels are red, green, and blue. Each channel can range from 0 (void of color), to 255 (maximum color).

Examples:

rgb(255, 0, 0) -- pure red
rgb(0, 255, 0) -- pure green
rgb(0, 0, 255) -- pure blue
rgb(84, 84, 84) -- dark gray
rgb(255, 140, 0) -- dark orange
rgb(178, 34, 34) -- fire brick

Note: As added convenience, rgb can also accept a table instead of a list of arguments.

Returns

rgb will return a table, with the appropriate values set. rgb is equivalent to:

function rgb(r, g, b)
    r = tonumber(r) or 0
    g = tonumber(g) or 0
    b = tonumber(b) or 0
    return {r, g, b, red = r, green = g, blue = b, r = r, g = g, b = b}
end

Example

window_color = rgb(100, 200, 255)

wnd = window.create{
    onerasebkgnd = function(wnd, pnt)
        pnt:rectangle(0, 0, wnd.width, wnd.height, false, window_color)
        return false
    end,
    }

while window.getcount() > 0 do
    window.pumpmessages()
end

See Also

• rgba
• paint
• image