How to check whether the Cell is copied from another cell, or how to check two Cells has the same geometries?

Hi Rick cheng

Although other element comparison APIs may exist, I (quickly) found two MDL native C API functions that may help.

Hint: If you transform both elements to the identity (in memory) you may be able to use the first function, otherwise the 2nd function provides the most flexibility of this otherwise complex topic.

1. mdlElmdscr_areTwoIdentical. This takes two elmDscr and performs a high level and rigorous comparison.
2. mdlElmdscr_areIdenticalToTolerance. This function takes two elmDscr for comparison and providing a number of flexible COMPAREOPT_ ComparisonFlags contexts (see: Mstn\MdlApi\mselmdsc.fdf:2852) and tolerance values you can tune to ensure matches have the level of equality needed.

HTH,
Bob

Hi Rick cheng

Although other element comparison APIs may exist, I (quickly) found two MDL native C API functions that may help.

Hint: If you transform both elements to the identity (in memory) you may be able to use the first function, otherwise the 2nd function provides the most flexibility of this otherwise complex topic.

1. mdlElmdscr_areTwoIdentical. This takes two elmDscr and performs a high level and rigorous comparison.
2. mdlElmdscr_areIdenticalToTolerance. This function takes two elmDscr for comparison and providing a number of flexible COMPAREOPT_ ComparisonFlags contexts (see: Mstn\MdlApi\mselmdsc.fdf:2852) and tolerance values you can tune to ensure matches have the level of equality needed.

HTH,
Bob

Hi Bob,

Robert Hook said:

Although other element comparison APIs may exist, I (quickly) found two MDL native C API functions that may help.

That's great, I still thought I saw some comparison function in the past, but was not able to find it ;-)

Although it's another question, it would be nice to develop this topic further from API development perspective, because CE API has moved from C style based on data structures to OOP access based on element handlers, where underlying data structures are not visible as not important. So it would be nice to know what approach can be used to achieve the same but without working with ElmDscr.

Regards,

  Jan

Thanks Bob, I will have a try with those api to varify whether it works for my case. where I just copied a cell multiple times.

Hi Jan,

Yes, I certainly agree this could be a fine: a.) API enhancement, and b.) source code "diffing example" for inclusion in the SDK.

Once MSCE SDK U12 goes out I will return to adding these to our backlog items.

Thank you,
Bob