How do i rotate a Polygon programmaticly?

Question

Original User: mmoles

I know the toolbar has a rotate option, but how can i rotate polygons programmaticly.

There must be some rotate function  like rotate(myPolygon, deg, centerPoint) somewhere in there.  If not, i guess i will need to write one myself =(

watch2.jpg

watch1.jpg

Anonymous User · Answer

Original User: mmoles

awesome, i knew that was in there somewhere.  I also edited my post after your reply asking 1 last question.

setGeometry(geometry) .... whats geometry do i pass in? The tempGraphicsLayer.graphics[2].getDojoShape() object that i did the transformation says it has no getExtent method.  Same goes with trying to pass in  tempGraphicsLayer.graphics[2].geometry funny enough.

JianHuang · Answer

Please take a look:
https://developers.arcgis.com/javascript/jsapi/map-amd.html#toscreen

Anonymous User · Answer

Original User: mmolesThat code snippet is what we are using in the API to rotate the shape. Once it's done, you need to call graphic.setGeometry() to make it permanent.
There are a lot math going on, but still gfx library can do a lot heavy lifting part.

Is it better to do it this way, or to modify the object and having it redraw?

I was using the mercator system and i was trying var tx = dojox.gfx.matrix.rotategAt(45, -10372784, 3316853)  which sadly doesnt work.   So, how can i convert a geo point to a browser coordinate?

Aaaand, last question... setGeometry(geometry)   .... whats geometry do i pass in?  The tempGraphicsLayer.graphics[2].getDojoShape() object that i did the transformation says it has no getExtent method.