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liminma8458
315 Views, 2 Replies

What is different between PostMultiplyBy and PreMultiplyBy in Inventor API?

Hi, Exports,

Recently, I looked into below 2 threads on PreMultiplyBy and PostMultiplyBy. Both of these Inventor API functions can apply to Matrix and do multiple rotations, what is different between these two functions? what is different between the results after their operations?

https://forums.autodesk.com/t5/inventor-programming-ilogic/combining-multiple-rotations/m-p/7553161

https://forums.autodesk.com/t5/inventor-programming-ilogic/rotate-block-in-part-sketch/td-p/13026176

Thanks
Limin
Inventor pro 2023 64 bit update 2.1; Windows 10 pro 64 bit version 21H2; Office 2013 32 bit