78 lines
1.7 KiB
Lua
78 lines
1.7 KiB
Lua
-- based of of plan9's Rectangle struct
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-- rect.max is not counted as "in" the rectangle
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Rect = {}
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Rect.__index = Rect
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function Rect:fromPoints(pt1, pt2)
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local o = { min = pt1, max = pt2 }
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setmetatable(o, self)
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return o
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end
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function Rect:fromCoords(x1, y1, x2, y2)
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return Rect:fromPoints(Point:new(x1, y1), Point:new(x2, y2))
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end
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-- clone refers to a deep copy
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function Rect:clone()
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return Rect:fromCoords(self.min.x, self.min.y, self.max.x, self.max.y)
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end
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-- make sure min and max refer to the correct corners
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-- acts in place, returns self
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function Rect:fix()
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if self.min.x > self.max.x then
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self.min.x, self.max.x = self.max.x, self.min.x
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end
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if self.min.y > self.max.y then
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self.min.y, self.max.y = self.max.y, self.min.y
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end
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end
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function Rect:width()
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return self.max.x - self.min.x
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end
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function Rect:height()
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return self.max.y - self.min.y
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end
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function Rect:size()
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return Point:new(self:width(), self:height())
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end
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function Rect:__add(pt)
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return Rect:fromPoints(self.min + pt, self.max + pt)
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end
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function Rect:corners()
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return {
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self.min:copy(), -- top left
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Point:new(self.max.x, self.min.y), -- top right
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Point:new(self.min.x, self.max.y), -- bottom left
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self.max:copy(), -- bottom right
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}
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end
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function Rect:containsPoint(pt)
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return pt.x >= self.min.x
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and pt.y >= self.min.y
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and pt.x <= self.max.x
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and pt.y <= self.max.y
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end
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function Rect:overlapsRect(other)
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return self.min.x < other.max.x
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and self.max.x > other.min.x
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and self.min.y < other.max.y
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and self.max.y > other.min.y
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end
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function Rect:draw(style)
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love.graphics.rectangle(style, self.min.x - Camera.pos.x, self.min.y - Camera.pos.y, self:width(), self:height())
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end
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function Rect:__tostring()
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return "Rect["..tostring(self.min).." "..tostring(self.max).."]"
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end
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