PolyExtrude_local scale

[sidd-kl01]

About Extrude face:

First of all I want to mention, I do understand the polymodifier plug-in and I know I must have to mannage myself the history issue from bottom, while dealing with polymodification. Now my question is :

if I want to Extrude the face with local scale manipulation then how to write this in c++ API. For better understanding I have attached an image.

By manual oparation in Maya, If I just scale a face inward , it does not create new faces arround it. But when i use polyExtrude and local scale manitpulator, the result looks like the attached image.. I want to automate this procedure in c++ API.

I am quite capable to manage the history issue with polymodifier in maya. Just i do not know how to do this local scale during polyExtrude. I do understand how tweak works. But tweak only scale the face or move vertex from one place to another. Tweak does not create new faces arround the given face. Please have a look at the attached image.

Many thanks

**I do not need any advice on history issue.. My queation is very basic, just about addressing local scale within polyExtrude command. How can I get same result in maya API.. The process can be different. Please help

MStatus status;

MFnMesh meshFn(fMesh);
MVector F_Normal(0, 0, 0);

meshFn.getPolygonNormal(fComponentIDs[0],F_Normal);

int divisionCount = 2;
MFloatVector translation;
translation = F_Normal;

bool extrudeTogether =false;

status = meshFn.extrudeFaces(fComponentIDs, divisionCount,&translation, extrudeTogether);

return status;

[joojaa]

Calculate the center, matrix multiply each point of the face by scale matrix located at center.

Its not the same tool you dont get all the functionality just the construction of the extrude itself, you get no acces to the other functions thet the exctrude node has you have to implement them ALL BY YOURSELF. There are no shortcuts, c++ is lowlevel and with few support function exceptions like the extrude covenience most of teh functionality is not there like amagic button. Just because the gui does something does NOT mean theres any eqivalent function in the api.

I want to automate this procedure in c++ API.

Then why dont you use the nodes that maya has? So do NOT use MFnMesh at all. Yes that means you gain no speed improvement, but its exteremely unlikey you would get any speed improvement anyway, becaue the existing maya nodes do work at fully optimized c++ speeds anyway irrespectively wether you use c++ nor not.

Only use mfnMesh if and ONLY if you plan to write a node or possibly a importer/exporter but you really should use nodes even in importers.

[sidd-kl01]

Many thanks Joojaa!! It is a great description and really helpfull for me.. I am looking at the matter accordingly..as you have described above.

Regards