introduction to maya programming

8/7/2019 Introduction to Maya Programming

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Introduction toMaya Programming

Shuen-Huei GuanCML, CSIE, National Taiwan University2003/10/7


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2Shuen-Huei Guan, CMLAB, CSIE,

NTU @2003

Ove r v iew

IntroductionPhilosophy b e hind MayaMaya programmingT utorial: ex port e r Assignm e nt


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3Shuen-Huei Guan, CMLAB, CSIE,

NTU @2003

W hy?

Maya is eve ry w h e r e, e sp e ciallyin gam e / film / animation.

Maya ex p e rt := A rtist + Comput e r Sci e ntist.

U ncl e Sam n ee ds you.


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4 Shuen-Huei Guan, CMLAB, CSIE,NTU @2003

Introduction to A lias

A lias R e s e arch , 1983.W a ve front Te chnologi e s , 1984.A lias| W a ve front und e r SGI , 1995.A lias , 2003.


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Introduction to Maya

R e le as e d in 1998.

Rumor has it thatImpl e m e nt e d by o ve r 200 PhDs.T oo big s.t. no on e kno w s it we ll.

A lias is going bigg e r.


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L e t s U s e Maya

B asic transformation.S e le ction by obj e ct , compon e nt.Polygonal mod e ling.Mirror.


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L e ctur e O utlin e

IntroductionPhilosophy b e hind MayaMaya programmingT utorial: ex port e r Assignm e nt


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Philosophy b e hind Maya

Be for e b e ing a programm e r , b e aphilosoph e r first.

T ruly , It is ugly. B ut luckily , it isnot that ugly as Microsoft things.


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Philosophy Ove r v iew

N aming Con ve rsion

Data Structur e

F unction S e ts


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N aming Con ve rsion

Pr e fi x L ogical Grouping E x ampl e

M Maya class MPoint

MPx Proxy object MPxNode

MIt Iterator class MItDag

MFn Function set MFnMesh


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3D R e nd e ring Pip e lin e

Static mod e lShading

Tex tur eAnimationR e nd e ring


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See test.avi


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Pip e lin e : Data

Mod e l

Tex tur e d Mod e l

Animat e d Mod e l

Vi ew point of data


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Pip e lin e : O p e rators

Polygon Manipulator

Shad e r

Animation Cur ve

Vi ew point of op e rators


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16 Shuen-Huei Guan, CMLAB, CSIE,

NTU @2003

Structur e in Maya

N od e Structur e

Dir e ct e d Acyclic Graph

De p e nd e ncy Graph


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NTU @2003

N od e Hi e rarchy


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NTU @2003

F unction S e ts

O bj e cts ar e hidd e n as handl e s(IDs).

U s e F unction s e ts to acc e ssobj e cts.


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NTU @2003

F unction S e ts in DiagramData Hi e rarchy

Group

GraphicsGrp DSPGrp Ne t w orkGrp

F unction S e t Hi e rarchy

Group F n

GraphicsGrp F n DSPGrp F n Ne t w orkGrp F n


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NTU @2003

E x ampl e : T raditional Class

CMesh* poMesh = poScene->getMesh(dove);

poVexArray = poMesh->getVexArray();

iPolyNum = poMesh->getPolyNum();

for (i=0; i


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NTU @2003

E x ampl e : F unction S e ts

MMesh oMesh = oScene.getMesh (dove);MFnMesh oMeshFn(oMesh);

MArray oArray = oMeshFn.getVexArray ();iPolyNum = oMeshFn.getPolyNum ();

for (i=0; i


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NTU @2003


IntroductionPhilosophy b e hind Maya

Maya programmingT utorial: ex port e r Assignm e nt


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NTU @2003

Maya Programming

2 choic e s for Maya programmingMaya Emb e dd e d L anguag e (ME L )

C++ API

N ot ex clusi ve to e ach oth e r.

N ot a s e t-r e lationship.


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NTU @2003

Introduction to ME L

F amiliar C-styl e grammar.G U I mak e r.

A ll you do is through ME L .

Maya := D LL s + ME L .


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NTU @2003





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NTU @2003

T utorial: ex port e r

E x port e r:Input: sc e n e fil e (.mb/.ma)

Platform: MayaO utput: obj fil e (.obj)


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NTU @2003

T hings you n ee d to kno w

F oundation.lib O p e nMaya.lib.U s e Maya w izard to e as e lif e .

Inh e rit from MP xF il eT ranslator.Put plug-in in ~Maya/bin/plug-ins.

Sampl e : l e p T ranslator.


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NTU @2003

E x port e r

T ra ve rs e all nod e s.Pick out m e sh nod e s.

E x tract data.Ve rtic e sPolygons

Mat e rialsAnimation cur ve s


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NTU @2003

E x port e r: Initialization

Entri e s of plug-in (dll / mll).initializ e Plugin()

uninitializ e Plugin()Ps e udo constructor to Maya

MP xF il eT ranslator::cr e ator()

Entry for ex port e r MP xF il eT ranslator:: w rit e r()


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NTU @2003

E x port e r: ex tract ve rtic e s

MItDag dagIter( MItDag::kBreadthFirst, MFn::kInvalid, &status);for ( ; !dagIter.isDone(); dagIter.next()) {

MObject obj = dagIter.item ();MFnMesh (obj, &status);

MPointArray vertexList;fnMesh.getPoints (vertexList, MSpace::kWorld );

for (i=0; i< vertexList.length(); i++) {vertexList[i].cartesianize ();MPoint point = vertexList[i];

}}


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NTU @2003

E x port e r: ex tract polygons

MItDag dagIter( MItDag::kBreadthFirst, MFn::kInvalid, &status);for ( ; !dagIter.isDone(); dagIter.next()) {

MObject obj = dagIter.item ();MFnMesh (obj, &status);

MPointArray vertexList;fnMesh.getPoints (vertexList, MSpace::kWorld );

MItMeshPolygon piter (obj, &status);for (; !piter.isDone(); piter.next()) {

}

}


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E x port e r: not e s

Ignor e Int e rm e diat e nod e s.U nload plug-in b e for e you

r e plac e it.U s e m e mory as e ff e cti ve ly aspossibl e .

Maya D eve lop e r's T ool Kit.


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Assignm e nt


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NTU @2003

R e f e r e nc e

Maya API W hit e Pap e r B ook:

Da v id Gould. Compl e t e MayaProgramming , Morgan-KaufmannPublish e rs3D U s e r Magazin e

W e b:

http:// www .alias w a ve front.com/http:// www .high e nd3d.com/http:// www .l e arning-maya.com/


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NTU @2003

App e ndi x

Maya P e rsonal L e arning Editionfor Maya Compl e t e 5

F r ee do w nloading coming O ct. 15 , 2003.N o Maya D ev -kit.Plug-ins do e s not w ork.


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T hanks for your att e ndanc e

introduction to maya programming

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