rotate a drawing object

[Degenerate Tech]

i have a rectangle i want to rotate by 90 degree ..how to do in pure python

[Elliot Garbus]

Have you tried converting the example to use python rather than kv?

 

https://kivy.org/doc/stable/examples/gen__canvas__rotation__py.html

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[Degenerate Tech]

sir i want to rotate 3 Rectangle objects with different angle ..i dont want to rotate Canvas object 

On Monday, November 23, 2020 at 1:13:48 AM UTC+5:30, ElliotG wrote:

Have you tried converting the example to use python rather than kv?

 

https://kivy.org/doc/stable/examples/gen__canvas__rotation__py.html

 

 

From: Degenerate Tech
Sent: Sunday, November 22, 2020 11:46 AM
To: Kivy users support
Subject: [kivy-users] rotate a drawing object

 

i have a rectangle i want to rotate by 90 degree ..how to do in pure python

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[planckp...@gmail.com]

Remember the trigonometry class at school?  Use sin() and cos() to recalculate the position of each of corners of the rectangle.

[Elliot Garbus]

It is not clear what you are trying to do.

Any item drawn is ultimately a canvas object.

 

Other Options:

Use a Scatter Widget

Draw a rectangle using Line.points, and recalculate the x,y positions for the rotation.

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[planckp...@gmail.com]

Its a Python question, see the answer here:

https://stackoverflow.com/questions/39879924/rotate-a-rectangle-consisting-of-4-tuples-to-left-or-right

[Alexander Taylor]

If you want arbitrary rotations, use a Rotate canvas instruction.

If you specifically want to rotate by 90 degrees, just invert the aspect ratio as others have said.