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nicer demo app

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This commit is contained in:
Matthias Richter 2016-01-02 14:39:54 +01:00
parent 5b3c05a415
commit c1f2d96c02
1 changed files with 22 additions and 18 deletions
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40
docs/index.rst
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@ -44,7 +44,7 @@ Example code
-- generate some assets (below)
function love.load()
snd = generateClickySound()
normal, hot = generateImageButton()
normal, hover, active = generateImageButton()
smallerFont = love.graphics.newFont(10)
end
@ -122,9 +122,11 @@ Example code
-- but the image may be bigger or smaller
-- the button shows the image `normal' when the mouse is outside the image
-- or above a transparent pixel
-- the button shows the image `hot` if the mouse is above an opaque pixel
-- the button shows the image `hover` if the mouse is above an opaque pixel
-- of the image `normal'
suit.ImageButton({normal, hot = hot}, suit.layout.row(200,100))
-- the button shows the image `active` if the mouse is above an opaque pixel
-- of the image `normal' and the mouse button is pressed
suit.ImageButton(normal, {hover = hover, active = active}, suit.layout.row(200,100))
-- if the checkbox is checked, display a precomputed layout
if chk.checked then
@ -183,22 +185,24 @@ Example code
end
function generateImageButton()
local normal, hot = love.image.newImageData(200,100), love.image.newImageData(200,100)
normal:mapPixel(function(x,y)
local d = (x/200-.5)^2 + (y/100-.5)^2
if d < .12 then
return 200,160,20,255
local metaballs = function(t, r,g,b)
return function(x,y)
local px, py = 2*(x/200-.5), 2*(y/100-.5)
local d1 = math.exp(-((px-.6)^2 + (py-.1)^2))
local d2 = math.exp(-((px+.7)^2 + (py+.1)^2) * 2)
local d = (d1 + d2)/2
if d > t then
return r,g,b, 255 * ((d-t) / (1-t))^.2
end
return 0,0,0,0
end
return 0,0,0,0
end)
hot:mapPixel(function(x,y)
local d = (x/200-.5)^2 + (y/100-.5)^2
if d < .13 then
return 255,255,255,255
end
return 0,0,0,0
end)
return love.graphics.newImage(normal), love.graphics.newImage(hot)
end
local normal, hover, active = love.image.newImageData(200,100), love.image.newImageData(200,100), love.image.newImageData(200,100)
normal:mapPixel(metaballs(.48, 188,188,188))
hover:mapPixel(metaballs(.46, 50,153,187))
active:mapPixel(metaballs(.43, 255,153,0))
return love.graphics.newImage(normal), love.graphics.newImage(hover), love.graphics.newImage(active)
end
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