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local class = require'r.class'
local Pos = require'r.pos'
local Rect = class()
function Rect.from_coords(cls, x0, y0, x1, y1)
assert(x0<x1,"x coords interchanged")
assert(y0<y1,"y coords interchanged")
return setmetatable({
tl=Pos:make(x0,y0),
br=Pos:make(x1,y1),
x0=x0, y0=y0, x1=x1, y1=y1,
w=x1-x0, h=y1-y0,
}, cls)
end
function Rect.from_pos(cls, tl, br)
assert(tl.x<br.x,"x coords interchanged")
assert(tl.y<br.y,"y coords interchanged")
return setmetatable({
tl=tl, br=br,
x0=tl.x, y0=tl.y, x1=br.x, y1=br.y,
w=br.x-tl.x, h=br.y-tl.y,
}, cls)
end
function Rect.from_xywh(cls, x0,y0, width,hight)
assert(0<width, "nonpositive width")
assert(0<hight, "nonpositive hight")
return setmetatable({
tl=Pos:make(x0,y0),
br=Pos:make(x0+width,y0+hight),
x0=x0, y0=y0,
x1=x0+width,
y1=y0+hight,
w=width, h=hight,
}, cls)
end
function Rect.from_centre_dims(cls, centre, width, hight)
assert(0<width, "nonpositive width")
assert(0<hight, "nonpositive hight")
local x0,x1 = centre.x-width/2, centre.x+width/2
local y0,y1 = centre.y-hight/2, centre.y+hight/2
return setmetatable({
tl=Pos:make(x0,y0),
br=Pos:make(x1,y1),
x0=x0,y0=y0,x1=x1,y1=y1,
w=width, h=hight,
}, cls)
end
function Rect.has(self, point)
return self.x0 <= point.x and point.x <= self.x1
and self.y0 <= point.y and point.y <= self.y1
end
function Rect.vals(self)
return self.x0, self.y0, self.w, self.h
end
function Rect.draw(self, mode)
love.graphics.rectangle(mode or 'line', self:vals())
end
function Rect.__tostring(self)
return tostring(self.tl).."\u{25af}"..tostring(self.br)
end
return Rect
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