How to tranform cordinates with respect to csys?

Altair Forum User

Hi all,

 

I have a node , say 659801 and I have coordinates as (138, 150 ,0) and coordinate system id =345

Now, I want the above coordinates with respect to some other coordinate system say, 400.

I am not able to locate HM-APIs which does this transformation?

Please suggest me a way or API to do this transformation of coordinates..

 

Regards

Gopal

 

tinh

Hi,

try hm_xpointlocal system_id x y z

x y z are global coord, and system_id is a local system

above function will return coordinate x in the local system

tinh

Anyway, even if there is no available api, can you write it your self? it's just some 3x3-matrix operations.

Altair Forum User

Hi Tinh,

I was able to do the transformation using the command suggested by you.

First I got global x, y z using below commands

    set ngx [hm_getentityvalue nodes $node globalx 0]
    set ngy [hm_getentityvalue nodes $node globaly 0]
    set ngz [hm_getentityvalue nodes $node globalz 0]

Then used the below command for getting coordinate with respect to local system id of need.

set xnode [hm_xpointlocal $n_systemId $ngx $ngy $ngz]    
 set znode [hm_zpointlocal $n_systemId $ngx $ngy $ngz]    

 

It is working perfectly..

Thanks for your valuable suggestion.It saved a lot of time for me.

 

Regards

Gopal