Maya教程之maya 履带动画绑定插件-职坐标

Maya教程之maya 履带动画绑定插件

凌雪 2018-07-30 来源：网络阅读 3026 评论 0

摘要：本文将带你了解Maya教程之maya 履带动画绑定插件，希望本文对大家学Maya有所帮助

本文将带你了解Maya教程之maya 履带动画绑定插件，希望本文对大家学Maya有所帮助

下面的maya api源码，需要大家自己在vs里编译。

//首先是头文件代码:

//头文件名称:glideDeformer.h

#ifndef glideDeformer_h
#define glideDeformer_h

#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include

class glideDeformer:public MPxDeformerNode
{
public:
    glideDeformer(){};

    virtual
~glideDeformer(){};

    static
void * creator(){return new glideDeformer;};
    static
MStatus initializeAttr();

    virtual
MStatus  deform(MDataBlock
&block, MItGeometry &iter, const MMatrix &mat, unsigned
int multiIndex);

    bool
getClosestUVParam(MPoint & point,MFnNurbsSurface &
surfaceFn,MObject surfaceData,double & paramU,double &
paramV);
    bool
getPointFroamSurfacePoint(MPoint & point,MFnNurbsSurface
& surfaceFn,MObject surfaceData,double & paramU,double
& paramV,MPoint & outPoint);
    bool
getPointAfterDeformed(MPoint &
pointInSurfaceMatrix,MFnNurbsSurface & surfaceFn,MObject
surfaceData,double & paramU,double & paramV,MPoint &
pointAffterDeformed);

    static
MString nodeName;
    static
MTypeId nodeId;

    static
MObject glide;
    static
MObject fixedBase;
    static
MObject aimDirection;
    static
MObject drivenSurface;
    static
MObject baseSurface;
};
#endif

//CPP文件

#include "glideDeformer.h"

MString glideDeformer::nodeName=MString("glideDeformer");
MTypeId glideDeformer::nodeId=MTypeId(0x87031);

MObject glideDeformer::glide;
MObject glideDeformer::fixedBase;
MObject glideDeformer::aimDirection;
MObject glideDeformer::drivenSurface;
MObject glideDeformer::baseSurface;

using std::cout;
using std::endl;

MStatus glideDeformer::initializeAttr()
{
    MFnNumericAttribute
numattr;
    MFnTypedAttribute
typedattr;
    MFnEnumAttribute
enumattr;

    glide=numattr.create("glide","gld",MFnNumericData::kFloat,0.0);

    numattr.setKeyable(true);

    numattr.setStorable(true);

    fixedBase=numattr.create("fixedBase","fxb",MFnNumericData::kBoolean,0);

    numattr.setKeyable(true);

    numattr.setStorable(true);

    aimDirection=enumattr.create("aimDirection","adr",0);

    enumattr.addField("directionU",0);

    enumattr.addField("directionV",1);

    enumattr.setKeyable(true);

    enumattr.setStorable(true);

    drivenSurface=typedattr.create("drivenSurface","dsf",MFnData::kNurbsSurface);

    typedattr.setStorable(false);

    baseSurface=typedattr.create("baseSurface","bsf",MFnData::kNurbsSurface);

    typedattr.setStorable(false);

    //addAttribtue

    addAttribute(glide);

    addAttribute(fixedBase);

    addAttribute(drivenSurface);

    addAttribute(baseSurface);

    addAttribute(aimDirection);

    attributeAffects(glide,outputGeom);

    attributeAffects(fixedBase,outputGeom);

    attributeAffects(aimDirection,outputGeom);

    attributeAffects(drivenSurface,outputGeom);

    attributeAffects(baseSurface,outputGeom);

    return
MS::kSuccess;
};

bool glideDeformer::getClosestUVParam(MPoint &
point,MFnNurbsSurface & surfaceFn,MObject surfaceData,double
& paramU,double & paramV)
{
    surfaceFn.setObject(surfaceData);

    MPoint
tmpPoint=surfaceFn.closestPoint(point,0,0,false,0.001,MSpace::kWorld);

    MStatus
stat=surfaceFn.getParamAtPoint(tmpPoint,paramU,paramV,true,MSpace::kWorld,0.001);

    return
true;
};

bool glideDeformer::getPointFroamSurfacePoint(MPoint &
point,MFnNurbsSurface & surfaceFn,MObject surfaceData,double
& paramU,double & paramV,MPoint & outPoint)
{
    surfaceFn.setObject(surfaceData);

    MVector
tangentU;
    MVector
tangentV;
    MVector
normal;
    MPoint
surfacePoint;
    surfaceFn.getPointAtParam(paramU,paramV,surfacePoint,MSpace::kWorld);

    normal=surfaceFn.normal(paramU,paramV,MSpace::kWorld);

    surfaceFn.getTangents(paramU,paramV,tangentU,tangentV,MSpace::kWorld);

    tangentU.normalize();

    tangentV.normalize();

    normal.normalize();

    double
matrix[4][4]={{tangentU.x,tangentU.y,tangentU.z,0.0},{normal.x,normal.y,normal.z,0.0},{tangentV.x,tangentV.y,tangentV.z,0.0},{surfacePoint.x,surfacePoint.y,surfacePoint.z,1.0}};

    MMatrix
surfacePointMatrix=MMatrix(matrix);
    //cout<<"baseSurfacePointMatrix:"<<surfacePointMatrix<<endl;



    outPoint=point*surfacePointMatrix.inverse();

    //cout<<"pointInSurfaceMatrixPosition:"<<outPoint<<endl;

    return
true;
};

bool glideDeformer::getPointAfterDeformed(MPoint &
pointInSurfaceMatrix,MFnNurbsSurface & surfaceFn,MObject
surfaceData,double & paramU,double & paramV,MPoint &
pointAffterDeformed)
{
    surfaceFn.setObject(surfaceData);

    MVector
tangentU;
    MVector
tangentV;
    MVector
normal;
    MPoint
surfacePoint;

    surfaceFn.getPointAtParam(paramU,paramV,surfacePoint,MSpace::kWorld);

    normal=surfaceFn.normal(paramU,paramV,MSpace::kWorld);

    surfaceFn.getTangents(paramU,paramV,tangentU,tangentV,MSpace::kWorld);

    tangentU.normalize();

    tangentV.normalize();

    normal.normalize();

    double
matrix[4][4]={{tangentU.x,tangentU.y,tangentU.z,0.0},{normal.x,normal.y,normal.z,0.0},{tangentV.x,tangentV.y,tangentV.z,0.0},{surfacePoint.x,surfacePoint.y,surfacePoint.z,1.0}};

    MMatrix
surfacePointMatrix=MMatrix(matrix);
    //cout<<"drivenSurfacePointMatrix:"<<surfacePointMatrix<<endl;

    pointAffterDeformed=pointInSurfaceMatrix*surfacePointMatrix;

    //cout<<"pointAffterDeformedPosition:"<<pointAffterDeformed<<endl;

    return
true;
};

MStatus  glideDeformer::deform(MDataBlock
&block, MItGeometry & iter, const MMatrix &mat,
unsigned int multiIndex)
{
    //cout<<"deform()方法调用..."<<endl;

    MDataHandle
envelopehandle=block.inputValue(envelope);
    MDataHandle
glidehandle=block.inputValue(glide);
    MDataHandle
fixedBasehandle=block.inputValue(fixedBase);
    MDataHandle
aimDirectionhandle=block.inputValue(aimDirection);


    float
envelopevalue=envelopehandle.asFloat();
    float
glidevalue=glidehandle.asFloat();
    short
aimDirectionvalue=aimDirectionhandle.asShort();
    bool
fixedBasevalue=fixedBasehandle.asBool();

    if
(envelopevalue==0.0)
    {

        //cout<<"envelope值为0,跳过deform方法..."<<endl;

        return
MS::kSuccess;
    };

    MDataHandle
drivenSurfacehandle=block.inputValue(drivenSurface);
    MDataHandle
baseSurfacehandle=block.inputValue(baseSurface);

    MFnNurbsSurfaceData
surfaceDataFn;
    MFnNurbsSurface
surfaceFn;

    MObject
drivenSurfaceData=drivenSurfacehandle.asNurbsSurface();
    MObject
baseSurfaceData=baseSurfacehandle.asNurbsSurface();

    MObject
drivenSurfaceObj=surfaceDataFn.create();
    MObject
baseSurfaceObj=surfaceDataFn.create();

    surfaceFn.setObject(drivenSurfaceData);

    surfaceFn.copy(drivenSurfaceObj);

    int
drivenSurfaceCvU=surfaceFn.numCVsInU();
    int
drivenSurfaceCvV=surfaceFn.numCVsInV();


    surfaceFn.setObject(baseSurfaceData);

    surfaceFn.copy(baseSurfaceObj);

    int
baseSurfaceCvU=surfaceFn.numCVsInU();
    int
baseSurfaceCvV=surfaceFn.numCVsInV();

    cout<<drivenSurfaceCvU<<"  "<<drivenSurfaceCvV<<"  "<<baseSurfaceCvU<<"  "<<baseSurfaceCvV<<" "<<endl;

    if
(drivenSurfaceCvU==0||drivenSurfaceCvV==0||drivenSurfaceCvU==0||baseSurfaceCvU==0||baseSurfaceCvV==0)

    {

        //cout<<"drivenSurface或baseSurface不正确，变形不产生..."<<endl;

        MGlobal::displayWarning("drivenSurface或baseSurface不正确，变形不产生...");

        return
MS::kSuccess;
    };

if
(drivenSurfaceCvU!=baseSurfaceCvU||drivenSurfaceCvV!=baseSurfaceCvV)

{
        //cout<<"drivenSurface与baseSurface不匹配，变形不产生..."<<endl;

        MGlobal::displayWarning("drivenSurface与baseSurface不匹配，变形不产生...");

        return
MS::kSuccess;
};


    MPoint
pt;
    MPoint
ptAfterDeformed;
    MPoint
pointInSurfacePointMatrix;
    double
paramU;
    double
paramV;
    double
newParamU;
    double
newParamV;
    int
index;
    float
weight;
    bool
test;
    if
(fixedBasevalue==false)
    {

        //cout<<"履带模式..."<<endl;

        for(iter.reset();!iter.isDone();iter.next())

        {

            index=iter.index();

            //cout<<"index:"<<index<<endl;

            weight=weightValue(block,multiIndex,index);

            //cout<<"weight:"<<weight<<endl;

            if
(weight==0)
            {

                //cout<<"权重为0,此点变形不产生..."<<endl;

                continue;

            };

            pt=iter.position(MSpace::kObject);

            pt=pt*mat;

            //cout<<"position:"<<pt<<endl;