library-mirrors/light_world.lua
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better screen range checking

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Tim Anema 2014-12-10 21:31:17 -05:00
parent 4a969a0aec
commit 3c559635e9
1 changed files with 6 additions and 3 deletions
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lib/body.lua
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@ -507,12 +507,15 @@ function body:isInLightRange(light)
end
function body:isInRange(l, t, w, h, s)
local bx, by, bw, bh
local radius
if self.type == 'circle' then
bx, by, bw, bh = self.x - self.radius, self.y - self.radius, self.radius * 2, self.radius * 2
radius = self.radius
else
bx, by, bw, bh = self.x, self.y, self.width, self.height
radius = (self.width > self.height and self.width or self.height)
end
local bx, by, bw, bh = self.x - radius, self.y - radius, radius * 2, radius * 2
return self.visible and (bx+bw) > (-l/s) and bx < (-l+w)/s and (by+bh) > (-t/s) and by < (-t+h)/s
end