Pygame Rect in Love?

[zorg]

I just realized something. If I change "bottom" to a larger value, should that mean that the rectangle moves down, or that it becomes taller? That's not obvious to me. Maybe functions like "moveToBottom" and "expandToBottom" are better for clarity.

Assigning to size, width or height changes the dimensions of the rectangle; all other assignments move the rectangle without resizing it. Notice that some attributes are integers and others are pairs of integers.

I personally find this less than appealing design, but to each their own, i guess Also, this be löve, so it can be implemented differently, better even.

[59 Byte]

I've written my own thing based on MadByte, Kingdaro, and zorg's examples. Here it is:

Rect.love

(1.05 KiB) Downloaded 152 times

Thanks everyone!

[MadByte]

One thing, you declared your constructor global which shouldn't be the case. Instead try this.

Code: Select all

function Rect:new(x,y,w,h)
	local self = setmetatable({}, Rect)
	self.x = x
	self.y = y
	self.width = w
	self.height = h
	return self
end

-- and at the end of the file return this
return setmetatable({}, {__call=Rect.new})

[zorg]

Code: Select all

-- and at the end of the file return this
return setmetatable({}, {__call=Rect.new})

I always returned just the constructor function in cases like this though, no need for a table to be called

Code: Select all

return Rect.new

Though my constructors are usually local, and if needed, i create a copy method that accesses the constructor.

[MadByte]

You're right.
So I guess it would be better to do

Code: Select all

function Rect.new(x, y, w, h)
 ...
end

...

return Rect.new

or

Code: Select all

local function newRect(x, y, w, h)
 ...
end

...

return newRect

I don't like the second one that much but it works.
There was a reason why I used __call in addition to some other stuff sometimes in the past, but I don't know it anymore :S

[zorg]

If you wanted to return a table full of "class" functions, then that would be a solution, calling the table calling the constructor.

[bobismijnnaam]

I actually implemented the bounding box with the .left or .bottom member thing, if people are interested they can see it here: http://pastebin.com/SG8PgtfM