Rotate animation doesn't work when Node has translation

[galexite]

How do I animate an explicit Transform in Macaw? My app involves a compass, which is a Node on a MacawView. I only want to animate rotation, so what I really wanted was to do this:

myNode.placeVar.animate(transform: Transform.rotate(...))

Therefore retaining (but not modifying) my scaling set to myNode.place.

I do understand that there is animate(to: Transform), but I loose my scaling. If I use animate(to: myNode.place.rotate(...)), I get rather weird issues with the node resizing almost seemingly randomly.

Is this possible in Macaw?

Thanks

[ystrot]

Hi George,

There is actually a special method for rotate animation:

myNode.placeVar.animate(angle: .pi)

This method can be used to rotate node around its center. You can also specify another point:

myNode.placeVar.animate(angle: .pi, x: x, y: y)

However these methods only available in the master version. You can switch to master by using:

pod 'Macaw', :git => 'https://github.com/exyte/Macaw.git'

[galexite]

placeVar.animate(angle: Double) doesn't seem to work as expected; i.e., my Node looks like this with no rotation called:

As soon as I use placeVar.animate(angle: Double):

The dial moves off-screen.

[vhailor13]

Hello @galexite ,
Can you provide us .svg source of your node? It seems like there is special case for bounds calculation. We will fix it asap.

[galexite]

I tried it with a brand new SVG of the same size and the same problem occurs (attached). I believe it is a problem with applying a positioning and scaling to the Node, and that this is being undone by animate(angle: Double), however, and not the SVG itself.

test.svg.zip

[galexite]

Are the bounds changed when a Transform is set, I wonder?

[galexite]

@vhailor13 The rotation animation works when no scaling or positioning is applied to the Node. Therefore, the problem isn't the SVG, it's the calculation of the origin when the Node has had a Transform set to its place.

[galexite]

Requires issue #134 to be fixed. I'll try doing it myself.

[vhailor13]

Fixed with f7c4acb. You can try it via pod update for master branch.

[galexite]

@vhailor13 Wow! Thanks! Testing now.

[galexite]

Solved. Thank you again @vhailor13!