Making an arrow image point at a particular coordinate

Hello,

 

I have about 85% of this solution I just need a little assistance if
possible to cap it off.  Here is the scenario:  I have an image of an arrow
(attached) where the arrow 'tip' is at 208,0 (roughly).  I need to rotate
this image about that point an arbitrary amount (for my example I'm using 45
degrees but it would be a variable).  Once it is rotated properly I need to
overlay that rotated image onto of another image and have the arrow tip
'point' to a particular X,Y coordinate (which I have - another variable).
The thing I cannot quite figure out is after I rotate how can I place the
image at a particular point but it uses the top-left (0,0) to place the
images as opposed to the rotated 'tip'.  Any suggestions would be greatly
appreciated.

 

- "arrow.png" (attached)    --- Arrow "Point" is at 208,0 (roughly)

- The variables I would receive from the program would be the rotation
amount (angle) and the X,Y of where to put the tip on the resulting image.

- this rotates the arrow 45 degrees and places it at 50,50 on the logo:
image but I want to 'tip' at 50,50 not the top-left.

 

convert logo: ( "C:\TEMP\arrow.png" -virtual-pixel transparent +distort SRT
"208,0 45" ) -geometry +50+50 -composite "C:\TEMP\testlogo.png"

 

Thanks again for any suggestions.

 

Matt

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