37 lines
989 B
Lua
37 lines
989 B
Lua
util={}
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function util.inside(x, y, rectangle)
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if x >= rectangle[1] and
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y >= rectangle[2] and
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x < rectangle[3]+rectangle[1] and
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y < rectangle[4]+rectangle[2] then
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return true
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else
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return false
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end
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end
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function util.aabb(sprite)
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local x = sprite.pos.x + sprite.bbo.left
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local y = sprite.pos.y + sprite.bbo.top
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local w = sprite.size.w - sprite.bbo.right - sprite.bbo.left
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local h = sprite.size.h - sprite.bbo.bottom - sprite.bbo.top
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return x, y, w, h
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end
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function util.check_aabb_collision(x1,y1,w1,h1, x2,y2,w2,h2)
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return ( x1 < x2 + w2 and x1 + w1 > x2 and y1 < y2 + h2 and y1 + h1 > y2 )
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end
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function util.luminance(r, g, b)
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return (0.2126*r + 0.7152*g + 0.0722*b)/255
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end
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function util.normalize(v)
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local magnitud = math.sqrt(v.x * v.x + v.y * v.y)
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if magnitud == 0 then
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return {x = 0, y = 0} -- evita división por cero
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end
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return {x = v.x / magnitud, y = v.y / magnitud}
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end
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