76 lines
1.5 KiB
Lua
76 lines
1.5 KiB
Lua
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rectgen = {}
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function rectgen:new(x,y,w,h)
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Rect = {x,y,w,h}
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function Rect:move(x,y)
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self[1] = self[1] + x
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self[2] = self[2] + y
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self:reAdapt()
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end
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function Rect:move_ip(x,y)
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self[1] = x
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self[2] = y
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self:reAdapt()
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end
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function Rect:setSize(w,h)
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self[3] = w
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self[4] = h
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self:reAdapt()
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end
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function Rect:move_center(x,y)
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self[1] = x-self.w/2
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self[2] = y-self.h/2
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self:reAdapt()
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end
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function Rect:reAdapt()
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self.x = self[1]
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self.y = self[2]
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self.w = self[3]
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self.h = self[4]
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self.center = {self.x+self.w/2,self.y+self.h/2}
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self.center.x = self.x+self.w/2
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self.center.y = self.y+self.h/2
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self.up = self.y
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self.left = self.x
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self.right = self.x+self.w
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self.down = self.y+self.h
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end
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function Rect:colliderect(orect,xoffset,yoffset,semisolid) -- AABB collision check
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local result = true
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local offx = xoffset or 0
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local offy = yoffset or 0
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if self.right+offx <= orect.left or self.left+offx>=orect.right then result = false end
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if self.down+offy <= orect.up or self.up+offy>=orect.down then result = false end
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if semi and result then
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if not self.bottom<orect.top then result = false end
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end
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return result
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end
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function Rect:collidepoint(x,y)
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return self.x<x and x<self.x+self.w and self.y<y and y<self.y+self.h
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end
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function Rect:colliderects(recttable,xoffset,yoffset,semisolid)
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local result = {}
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for i,v in pairs(recttable) do
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if self:colliderect(v,xoffset,yoffset,semisolid) then table.insert(result,v) end
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end
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return result
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end
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Rect:reAdapt()
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return Rect
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end
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return rectgen
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