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Why no rotate property in matrix 2D ? we know the short hand code in matrix 2D transform:matrix(a,b,c,d,x,y) a=scale X b=Skew y c=skew X d=scale Y

x=translate X y=translate Y

why developers didn't create extra place for rotation 2D?

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    $\begingroup$ I can't figure out what you're asking here. Some context is missing. Also, it sounds a bit like a rant. $\endgroup$
    – Yuval Filmus
    Feb 12, 2016 at 15:14

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The 2 x 2 portion of the matrix ($a$, $b$, $c$ and $d$) can represent rotation as well as scaling and skewing. I'd have to see the code to be sure, but if the angle is $\theta$, you would probably set $a$ and $d$ to $cos(\theta)$, $b$ to $-sin(\theta)$ and $c$ to $sin(\theta)$. Put another way, rotation can be constructed as a combination of scaling and skewing.

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