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iOS Intermediate Swift Properties Computed Properties

Posted by Taha Ahsan
Taha Ahsan
4,717 Points

Confused in regards to how to get centerX and Y as well as Center Value

At 6:00 We add width of the rectangle divided by 2,"Why do we divide by 2?

Also, at 8:03 why subtract width and height from centervalue x and y to get origin x and y?

1 Answer

Deysha Rivera
Deysha Rivera
5,088 Points
Deysha Rivera
Deysha Rivera
5,088 Points

We divide by 2, because the center of the rectangle is at the half of the length and half of the width. This "gets" us the center value.

The second part is not explained very well. We are changing the origin (originally 0,0) to match the center value of the rectangle, so we subtract what we know about the rectangle's center in order to shift it.