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stretchMeshCmd.cpp
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// File: stretchMeshCmd.cpp
//
// Description:
// This defines a command that will create a stretch mesh node, and initialize
// all of the relevant attributes for that node (pyramid coordinates etc.). The
// deformer itself is defined in another project (stretchMesh.cpp)
//
#define KS_DOUBLE_EQ(x,v) (((v - 0.00000001) < x) && (x <( v + 0.00000001)))
#include "stretchMeshCmd.h"
#include <math.h>
#include <vector>
#include <algorithm>
#include <maya/MItSelectionList.h>
#include <maya/MString.h>
#include <maya/MArgList.h>
#include <maya/MItMeshVertex.h>
#include <maya/MPointArray.h>
#include <maya/MFnCamera.h>
#include <maya/MGlobal.h>
#include <maya/M3dView.h>
#include <maya/MDagPath.h>
#include <maya/MPlug.h>
#include <maya/MPlugArray.h>
#include <maya/MCommandResult.h>
#include <maya/MFnNurbsCurve.h>
#include <maya/MSyntax.h>
#include <maya/MArgParser.h>
#include <maya/MArgDatabase.h>
#include <maya/MCursor.h>
#include <maya/MMatrix.h>
#include "ksUtils.h"
#include "IncludeMFnPluginClass.h"
using namespace std;
// Custom struct for holding the polar coordinates of connected verts. PolarAngle and polarDistance
// represent the polar coordinates for the connected vert relative to the current vert. We are using the
// vector from the current vert to the 1st connected vert (as returned by getConnectedVertices() ) as the
// xAxis/polarAxis of the polar coordinate system. The wedgeAngle represents the angle between the
// two adjacent connected verts
struct polarCoords {
int vertID;
double polarAngle;
double polarDistance;
double wedgeAngle;
};
// Function for sorting an array of objects of type <polarCoords>
bool polarCoordsCompare (polarCoords i, polarCoords j) {
return (i.polarAngle < j.polarAngle);
}
bool stretchMeshCmd::Registered = false;
stretchMeshCmd::~stretchMeshCmd() {}
void* stretchMeshCmd::creator()
{
return new stretchMeshCmd();
}
MSyntax stretchMeshCmd::newSyntax()
{
MSyntax syntax;
syntax.enableEdit(true);
syntax.addFlag(kCollisionStepFlag, kCollisionStepFlagLong, MSyntax::kDouble);
syntax.addFlag(kIterationFlag, kIterationFlagLong, MSyntax::kDouble);
syntax.addFlag(kStiffnessFlag, kStiffnessFlagLong, MSyntax::kDouble);
syntax.addFlag(kCollisionFlag, kCollisionFlagLong, MSyntax::kBoolean);
syntax.addFlag(kAddColliderFlag, kAddColliderFlagLong, MSyntax::kString);
syntax.addFlag(kAddCurveColliderFlag, kAddCurveColliderFlagLong, MSyntax::kString);
syntax.addFlag(kAddSphereColliderFlag, kAddSphereColliderFlagLong, MSyntax::kString);
syntax.addFlag(kAddAttractorFlag, kAddAttractorFlagLong, MSyntax::kString);
syntax.addFlag(kAddCurveAttractorFlag, kAddCurveAttractorFlagLong, MSyntax::kString);
syntax.addFlag(kScaleSafeFlag, kScaleSafeFlagLong, MSyntax::kBoolean);
syntax.addFlag(kExtendConnectedVertsFlag, kExtendConnectedVertsFlagLong, MSyntax::kBoolean);
syntax.useSelectionAsDefault( true );
syntax.setObjectType( MSyntax::kSelectionList );
return syntax;
}
MStatus stretchMeshCmd::doIt( const MArgList& args )
//
// Description
// Gets the currently selected object, and stores it in the local class data.
// Then calls redoit to actually execute the command.
//
// Note
// The doit method should collect whatever information is
// required to do the task, and store it in local class data.
// It should finally call redoIt to make the command happen.
//
{
MStatus status;
status = parseArgs(args);
if (MS::kSuccess != status)
return status;
return redoIt();
}
MStatus stretchMeshCmd::parseArgs(const MArgList &args)
{
MStatus status;
MArgDatabase argData(syntax(), args);
MSelectionList argObjects;
// Initialize the <attribute>FlagSet variables to false so we can tell later on if they
// were set from the command line.
collisionStepFlagSet = false;
iterationFlagSet = false;
collisionFlagSet = false;
addColliderFlagSet = false;
addAttractorFlagSet = false;
addCurveAttractorFlagSet = false;
stiffnessFlagSet = false;
isEditMode = false;
addCurveColliderFlagSet = false;
addSphereColliderFlagSet = false;
scaleSafeFlagSet = false;
extendConnectedVertsFlagSet = false;
if (argData.isEdit()) { isEditMode = true; }
if (argData.isFlagSet(kCollisionStepFlag)) {
int tmp;
status = argData.getFlagArgument(kCollisionStepFlag, 0, tmp);
if (!status) {
status.perror("collision step flag parsing failed");
return status;
}
collisionStepFlag = tmp;
collisionStepFlagSet = true;
}else{ collisionStepFlag = COLLISION_STEP_DFLT; }
if (argData.isFlagSet(kIterationFlag)) {
int tmp;
status = argData.getFlagArgument(kIterationFlag, 0, tmp);
if (!status) {
status.perror("iteration flag parsing failed");
return status;
}
iterationFlag = tmp;
iterationFlagSet = true;
}else{ iterationFlag = ITERATIONS_DFLT; }
if (argData.isFlagSet(kStiffnessFlag)) {
double tmp;
status = argData.getFlagArgument(kStiffnessFlag, 0, tmp);
if (!status) {
status.perror("stiffness flag parsing failed");
return status;
}
stiffnessFlag = tmp;
stiffnessFlagSet = true;
}else{ stiffnessFlag = STIFFNESS_DFLT; }
if (argData.isFlagSet(kCollisionFlag)) {
bool tmp;
status = argData.getFlagArgument(kCollisionFlag, 0, tmp);
if (!status) {
status.perror("collision flag parsing failed");
return status;
}
collisionFlag = tmp;
collisionFlagSet = true;
}else{ collisionFlag = COLLISION_DFLT; }
if (argData.isFlagSet(kAddColliderFlag)) {
MString tmp;
status = argData.getFlagArgument(kAddColliderFlag, 0, tmp);
if (!status) {
status.perror("Add collider flag parsing failed");
return status;
}
addColliderFlag = tmp;
addColliderFlagSet = true;
}
if (argData.isFlagSet(kAddCurveColliderFlag)) {
MString tmp;
status = argData.getFlagArgument(kAddCurveColliderFlag, 0, tmp);
if (!status) {
status.perror("Add curve collider flag parsing failed");
return status;
}
addCurveColliderFlag = tmp;
addCurveColliderFlagSet = true;
}
if (argData.isFlagSet(kAddSphereColliderFlag)) {
MString tmp;
status = argData.getFlagArgument(kAddSphereColliderFlag, 0, tmp);
if (!status) {
status.perror("Add sphere collider flag parsing failed");
return status;
}
addSphereColliderFlag = tmp;
addSphereColliderFlagSet = true;
}
if (argData.isFlagSet(kAddAttractorFlag)) {
MString tmp;
status = argData.getFlagArgument(kAddAttractorFlag, 0, tmp);
if (!status) {
status.perror("Add attractor flag parsing failed");
return status;
}
addAttractorFlag = tmp;
addAttractorFlagSet = true;
}
if (argData.isFlagSet(kAddCurveAttractorFlag)) {
MString tmp;
status = argData.getFlagArgument(kAddCurveAttractorFlag, 0, tmp);
if (!status) {
status.perror("Add attractor flag parsing failed");
return status;
}
addCurveAttractorFlag = tmp;
addCurveAttractorFlagSet = true;
}
if (argData.isFlagSet(kScaleSafeFlag)) {
bool tmp;
status = argData.getFlagArgument(kScaleSafeFlag, 0, tmp);
if (!status) {
status.perror("scale safe flag parsing failed");
return status;
}
scaleSafeFlag = tmp;
scaleSafeFlagSet = true;
}else{ scaleSafeFlag = SCALE_SAFE_DFLT; }
if (argData.isFlagSet(kExtendConnectedVertsFlag)) {
bool tmp;
status = argData.getFlagArgument(kExtendConnectedVertsFlag, 0, tmp);
if (!status) {
status.perror("Extend connected vert flag parsing failed");
return status;
}
extendConnectedVertsFlag = tmp;
extendConnectedVertsFlagSet = true;
}else{ extendConnectedVertsFlag = EXTEND_CONN_VRTS_DFLT; }
argData.getObjects(argObjects);
if(argObjects.length() == 0){
MGlobal::displayError( "No deformable objects selected." );
}
// if there were objects passed in on the command line, use those. Else use the selected objects
selected = argObjects;
return MS::kSuccess;
}
MStatus stretchMeshCmd::redoIt()
//
// Description
// Creates/modifies a StretchMesh node
//
// Note
// The redoIt method should do the actual work, based on the
// internal data only.
//
{
MStatus status;
// We only want the polygonal meshes from the selection list
MItSelectionList iter(selected, MFn::kMesh, &status );
if (MS::kSuccess != status) {
cerr << "redoIt: could not create selection list iterator\n";
return status;
}
MString currSelected;
MSelectionList selectionList;
MPlug deformerPlug;
//unsigned int numShapes;
int prevIndex;
MVector nrml;
MPoint currVrtPt;
MVector currVrtPos;
MPointArray inputPts;
MPoint connVrtPt;
MVector connVrtPos;
MVector currVrtProj;
MVector connVrtProj;
MVector projected;
double d;
MDoubleArray mvWeights;
MPoint conn1Pt;
MVector conn1Pos;
MVector conn1Proj;
MVector vec1;
MPoint conn2Pt;
MVector conn2Pos;
MVector conn2Proj;
MVector vec2;
MVector vec;
MStringArray melResult;
MIntArray connVerts;
MIntArray connVertsReverse;
MIntArray degenerateVertIds;
MPlug polarCoordsPlug;
MPlug nrmlOrderPlug;
MPlug connVrtIdPlug;
MPlug connVrtIdNrmlOrderPlug;
MPlug connVrtIdPlugArray;
MPlug connVrtIdNrmlOrderPlugArray;
MSelectionList degenerateVertList;
degenerateVertList.clear();
clearResult();
// First, we must determine if we're in edit mode
if (isEditMode){
if(selected.length() != 1){
MGlobal::displayError("A single deformer should be specified in edit/query mode.");
return MStatus::kFailure;
}
// Find the StretchMesh node from the selected object
MObject argObj;
MObject stretchMeshObj;
selected.getDependNode(0, argObj);
MFnDependencyNode argFn;
argFn.setObject(argObj);
// First, we check to see if argObj is the StretchMesh node.
if(argFn.typeName() == "stretchMesh"){
deformerFnDepNode.setObject(argObj);
}else{
// If we've gotten here, the argument to the command was not the stretchMesh, so we
// have to search for it in the input to this mesh's inMesh attr.
MDagPath argDagPath;
selected.getDagPath(0, argDagPath);
argDagPath.extendToShapeDirectlyBelow(0);
argFn.setObject(argDagPath.node());
MPlug inMeshPlug;
inMeshPlug = argFn.findPlug("inMesh");
if(!inMeshPlug.isConnected()){
MStringArray selectionStrings;
selected.getSelectionStrings(selectionStrings);
MGlobal::displayError("Expected a stretchMesh deformer or a deformed shape. Found '" + selectionStrings[0] + "' instead.");
return MStatus::kFailure;
}
// get the plug connected to the inMesh, this should be a StretchMesh, if not, print error and exit.
MPlugArray connectedPlugs;
MPlug connectedPlug;
inMeshPlug.connectedTo(connectedPlugs, true, false);
argFn.setObject(connectedPlugs[0].node());
if(argFn.typeName() == "stretchMesh"){
deformerFnDepNode.setObject(connectedPlugs[0].node());
}else{
MGlobal::displayError("Expected a stretchMesh deformer or a deformed shape.");
return MStatus::kFailure;
}
}
// If we've made it here, deformerFnDepNode contains the stretchMesh node.
// Set the attributes to be edited. Only the attributes that were specified to the
// command should be set, we can determine this from the <attribute>FlagSet boolean
// member attributes.
MPlug stretchMeshPlug;
// get the plug for nodeState, disable the stretchMesh deformer so it's not evaluating as we go.
stretchMeshPlug = deformerFnDepNode.findPlug("nodeState");
int nodeState;
stretchMeshPlug.getValue(nodeState);
stretchMeshPlug.setValue( 1 );
if(collisionStepFlagSet){
// Store the attribute values before making any changes for undo purposes.
stretchMeshPlug = deformerFnDepNode.findPlug("collisionStep");
stretchMeshPlug.getValue(collisionStepOrig);
stretchMeshPlug.setValue( collisionStepFlag );
}
if(iterationFlagSet){
// Store the attribute values before making any changes for undo purposes.
stretchMeshPlug = deformerFnDepNode.findPlug("iterations");
stretchMeshPlug.getValue(iterationOrig);
stretchMeshPlug.setValue( iterationFlag );
}
if(stiffnessFlagSet){
// Store the attribute values before making any changes for undo purposes.
stretchMeshPlug = deformerFnDepNode.findPlug("stiffnessList");
stretchMeshPlug = stretchMeshPlug.elementByLogicalIndex(0);
stretchMeshPlug = stretchMeshPlug.child(0);
stiffnessOrigArray.clear();
stiffnessOrigArray.setLength(stretchMeshPlug.numElements());
for(int itr = 0; itr < stiffnessOrigArray.length(); itr++){
stretchMeshPlug = deformerFnDepNode.findPlug("stiffnessList");
stretchMeshPlug = stretchMeshPlug.elementByLogicalIndex(0);
stretchMeshPlug = stretchMeshPlug.child(0);
stretchMeshPlug = stretchMeshPlug.elementByLogicalIndex(itr);
stretchMeshPlug.getValue(stiffnessOrigArray[itr]);
}
// set the stiffness values
for(int itr = 0; itr < stiffnessOrigArray.length(); itr++){
stretchMeshPlug = deformerFnDepNode.findPlug("stiffnessList");
stretchMeshPlug = stretchMeshPlug.elementByLogicalIndex(0);
stretchMeshPlug = stretchMeshPlug.child(0);
stretchMeshPlug = stretchMeshPlug.elementByLogicalIndex(itr);
stretchMeshPlug.setValue( stiffnessFlag );
}
}
if(scaleSafeFlagSet){
// Store the attribute values before making any changes for undo purposes.
stretchMeshPlug = deformerFnDepNode.findPlug("enableScaleSafe");
stretchMeshPlug.getValue(scaleSafeOrig);
stretchMeshPlug.setValue( scaleSafeFlag );
}
if(addColliderFlagSet){
addCollider();
}
if(addCurveColliderFlagSet){
addCurveCollider();
}
if(addSphereColliderFlagSet){
addSphereCollider();
}
if(addAttractorFlagSet){
addAttractor();
}
if(addCurveAttractorFlagSet){
addCurveAttractor();
}
// turn nodeState back to what is was before we started
stretchMeshPlug = deformerFnDepNode.findPlug("nodeState");
stretchMeshPlug.setValue( nodeState );
melResult.append(deformerFnDepNode.name());
/////////////////////////////////////////////////////////////////////////////
// END EDIT MODE ////////
/////////////////////////////////////////////////////////////////////////////
}else{
// We're not in edit mode, so just iterate through the selection list and apply a
// stretchMesh to any selected poly mesh
for(iter.reset(); !iter.isDone(); iter.next() )
{
MDagPath selectedItem;
iter.getDagPath(selectedItem);
if(selectedItem.apiType() != MFn::kMesh){
MGlobal::displayError("StretchMesh must be applied to a polygonal mesh");
continue;
}
// First off... create the stretchMesh deformer
MStringArray deformerResult;
MGlobal::executeCommand( "deformer -type stretchMesh " + selectedItem.fullPathName(), deformerResult );
melResult.append(deformerResult[0]);
// Add the deformer string to the member list so it can be removed during undo.
stretchMeshesCreated.append(deformerResult[0]);
selectionList.clear();
selectionList.add( deformerResult[0] );
MObject deformerObj;
selectionList.getDependNode(0, deformerObj);
deformerFnDepNode.setObject(deformerObj);
// set the version of stretchMesh that was used to create this node
deformerPlug = deformerFnDepNode.findPlug("stretchMeshVersion");
deformerPlug.setValue( SM_VERSION );
// get the plug for nodeState, disable the stretchMesh deformer so it's not evaluating as we go.
deformerPlug = deformerFnDepNode.findPlug("nodeState");
deformerPlug.setValue( 1 );
// Populate an array with the input point positions
MItMeshVertex vertIter( selectedItem );
int vertCount = vertIter.count();
inputPts.clear();
inputPts.setLength(vertCount);
for(vertIter.reset(); !vertIter.isDone(); vertIter.next() ){
inputPts[vertIter.index()] = vertIter.position( MSpace::kWorld );
}
connVrtIdPlugArray = deformerFnDepNode.findPlug("connVrtIdList");
connVrtIdPlugArray.setNumElements(vertCount);
connVrtIdNrmlOrderPlugArray = deformerFnDepNode.findPlug("connVrtIdNrmlOrderList");
connVrtIdNrmlOrderPlugArray.setNumElements(vertCount);
// iterate through each vertex, and set the corresponding pyramid coords on the deformer
for(int vertId = 0; vertId < vertCount; vertId++){
MItMeshVertex pyramidCoordsIter( selectedItem );
pyramidCoordsIter.setIndex(vertId, prevIndex);
connVerts.clear();
if(extendConnectedVertsFlag){
getConnectedVerts(pyramidCoordsIter, connVerts, vertId);
}else{
pyramidCoordsIter.getConnectedVertices( connVerts );
}
// // The paper calls for the connected verts to be in counter clockwise order, but getConnectedVertices returns
// // them in clockwise order. I'm reversing them here to be consistent with the paper...
// int connVertsItr = connVertsReverse.length();
// connVertsItr = connVertsItr - 1;
// connVerts.clear();
// for( ; connVertsItr >= 0; connVertsItr--){
// connVerts.append( connVertsReverse[connVertsItr] );
// }
nrml = getCurrNormal(inputPts, connVerts);
// Determine the d term of the projection plane equation
currVrtPt = inputPts[vertId];
currVrtPos.x = currVrtPt.x; currVrtPos.y = currVrtPt.y; currVrtPos.z = currVrtPt.z;
d = 0.0;
for(int j = 0; j < connVerts.length(); j++){
connVrtPt = inputPts[connVerts[j]];
connVrtPos.x = connVrtPt.x; connVrtPos.y = connVrtPt.y; connVrtPos.z = connVrtPt.z;
d = d + nrml*connVrtPos;
}
d = -(d/connVerts.length());
// project the current vertex and each neighboring vertex onto the projection plane, we'll call these v' and vi'
// respectively
currVrtProj = projectVrtToPlane(currVrtPos, nrml, d);
// NOTE: I'm not sure if this is necessary... connVrtProj isn't used anywhere else in the python version of this
// script... which is what I'm porting from.
connVrtProj.x = 0; connVrtProj.y = 0; connVrtProj.z = 0;
// Here, we're converting all connected points to polar coordinates. This is a bug fix for vertices that were degenerate.
// Converting to polar coordinates ensures that the total of all angles between adjacent connected verts and
// the current vert equals 360. First we need to define 2d cartesian coordinates based on the planed defined by
// "nrml". Here, we define the x and y axes of the 2d cartesian coordinate system:
MPoint xAxisPt = inputPts[connVerts[0]];
MVector xAxis;
xAxis.x = xAxisPt.x; xAxis.y = xAxisPt.y; xAxis.z = xAxisPt.z;
xAxis = projectVrtToPlane(xAxis, nrml, d);
xAxis = xAxis - currVrtProj;
xAxis.normalize();
MVector yAxis;
yAxis = nrml^xAxis;
yAxis.normalize();
// now convert all the connected verts to polar coordinates with respect to the plane defined by "nrml":
vector<polarCoords> polarCoordsArray;
polarCoordsArray.clear();
for(int connVrtItr = 0; connVrtItr < connVerts.length(); connVrtItr++){
double xCoord, yCoord;
MPoint connPt = inputPts[connVerts[connVrtItr]];
MVector connVec;
connVec.x = connPt.x; connVec.y = connPt.y; connVec.z = connPt.z;
connVec = projectVrtToPlane(connVec, nrml, d);
connVec = connVec - currVrtProj;
xCoord = connVec*xAxis;
yCoord = connVec*yAxis;
polarCoords currPolarCoords;
currPolarCoords.vertID = connVerts[connVrtItr];
currPolarCoords.polarDistance = sqrt((xCoord*xCoord) + (yCoord*yCoord));
// Using the polar coordinate coversion descirbed on wikipedia
if(xCoord > 0 && (yCoord > 0 || KS_DOUBLE_EQ(yCoord, 0.0))){
currPolarCoords.polarAngle = atan(yCoord/xCoord);
}else if(xCoord > 0 && yCoord < 0){
currPolarCoords.polarAngle = atan(yCoord/xCoord) + (2.0 * PI);
}else if(xCoord < 0){
currPolarCoords.polarAngle = atan(yCoord/xCoord) + PI;
}else if(KS_DOUBLE_EQ(xCoord, 0.0) && yCoord > 0){
currPolarCoords.polarAngle = PI/2.0;
}else if(KS_DOUBLE_EQ(xCoord, 0.0) && yCoord < 0){
currPolarCoords.polarAngle = (3.0 * PI)/2.0;
}else if(KS_DOUBLE_EQ(xCoord, 0.0) && KS_DOUBLE_EQ(yCoord, 0.0)){ // Handling the case of colocated verts
currPolarCoords.polarAngle = 0.0;
}
// fill the polarCoords struct
polarCoordsArray.push_back(currPolarCoords);
}
// sort the polar coords array according to the polar angle:
sort(polarCoordsArray.begin(), polarCoordsArray.end(), polarCoordsCompare );
// We have the polar angles, but now we need to calculate the wedgeAngles which actually
// represent the angles we're interested in (see description in polarCoords struct definition above)
for(int i = 0; i < polarCoordsArray.size(); i++){
if(i==0){
polarCoordsArray[i].wedgeAngle = polarCoordsArray[i].polarAngle;
}else{
polarCoordsArray[i].wedgeAngle = polarCoordsArray[i].polarAngle - polarCoordsArray[i-1].polarAngle;
}
}
// The first wedgeAngle is incorrectly set to zero, fixing that here:
polarCoordsArray[0].wedgeAngle = (2.0*PI) - polarCoordsArray.back().polarAngle;
// set the attributes representing the connected verts.
connVrtIdPlug = connVrtIdPlugArray.elementByLogicalIndex(vertId);
connVrtIdPlug = connVrtIdPlug.child(0);
connVrtIdPlug.setNumElements(connVerts.length());
connVrtIdNrmlOrderPlug = connVrtIdNrmlOrderPlugArray.elementByLogicalIndex( vertId );
connVrtIdNrmlOrderPlug = connVrtIdNrmlOrderPlug.child(0);
connVrtIdNrmlOrderPlug.setNumElements(connVerts.length());
for(int j = 0; j < connVerts.length(); j++ ){
// We have to store connected vertices in two ways (for backward compatibility),
// one in an order consistent with the way the normal is calculated, and one in
// a way that is consistent with the way the polar angles are stored. Polar
// angle order here:
polarCoordsPlug = connVrtIdPlug.elementByLogicalIndex(j);
polarCoordsPlug.setValue(polarCoordsArray[j].vertID);
// ... and normal order here:
nrmlOrderPlug = connVrtIdNrmlOrderPlug.elementByLogicalIndex(j);
nrmlOrderPlug.setValue(connVerts[j]);
}
// Determine the mean-value weights:
//
mvWeights.clear();
double weightsSum = 0.0;
for(int j = 0; j < connVerts.length(); j++){
if(connVerts.length() > MAX_NUM_CONN_VRTS){
MGlobal::executeCommand( "error \"stretchMesh currently only supports meshes with 32 or fewer connected vertices per vertex\"" );
return MStatus::kFailure;
}
double alpha1 = polarCoordsArray[j].wedgeAngle;
double alpha2 = polarCoordsArray[(j+1)%connVerts.length()].wedgeAngle;
weightsSum = weightsSum + (tan(alpha1/2) + tan(alpha2/2))/polarCoordsArray[j].polarDistance;
mvWeights.append((tan(alpha1/2) + tan(alpha2/2))/polarCoordsArray[j].polarDistance);
}
int weightItr = 0;
for(int j = 0; j < mvWeights.length(); j++){
mvWeights[j] = mvWeights[j]/weightsSum;
deformerPlug = deformerFnDepNode.findPlug("meanWeightsList");
deformerPlug = deformerPlug.elementByLogicalIndex( vertId );
deformerPlug = deformerPlug.child(0);
deformerPlug = deformerPlug.elementByLogicalIndex( j );
deformerPlug.setValue( mvWeights[j] );
weightItr = weightItr + 1;
}
// Determine the normal component of the pyramid coords (the "b" term in the paper)
vec = currVrtPos - currVrtProj;
double b = vec.length();
if ( vec*nrml < 0 ){
b = -b;
}
deformerPlug = deformerFnDepNode.findPlug("b");
deformerPlug = deformerPlug.elementByLogicalIndex(vertId);
deformerPlug.setValue( b );
// This is an alternate method for determining "b". This method produces better
// results when scaling the mesh.
for(int j = 0; j < polarCoordsArray.size(); j++){
if(polarCoordsArray.size() > MAX_NUM_CONN_VRTS){
MGlobal::executeCommand( "error \"stretchMesh currently only supports meshes with 32 or fewer connected vertices per vertex\"" );
return MStatus::kFailure;
}
// To represent the normal component of vi with respect to the local frame, we
// calculate the signed cosine of the angle between each edge incident to vi and the
// normal
connVrtPt = inputPts[polarCoordsArray[j].vertID];
MVector connPtToCurrPt;
connPtToCurrPt = (currVrtPos - connVrtPt);
double cos = (connPtToCurrPt * nrml)/connPtToCurrPt.length();
double bScales = (cos)/(sqrt(1 - (cos*cos)));
deformerPlug = deformerFnDepNode.findPlug("bScalableList");
deformerPlug = deformerPlug.elementByLogicalIndex( vertId );
deformerPlug = deformerPlug.child(0);
deformerPlug = deformerPlug.elementByLogicalIndex( j );
deformerPlug.setValue( bScales );
}
deformerPlug = deformerFnDepNode.findPlug("stiffnessList");
// "stiffnessList" is a compound attribute that has children that correspond to the
// individual vert stiffness values. It must be a compound attribute in order to support
// weight painting.
deformerPlug = deformerPlug.elementByLogicalIndex(0);
deformerPlug = deformerPlug.child(0);
// Now get the actual stiffness plug
deformerPlug = deformerPlug.elementByLogicalIndex(vertId);
deformerPlug.setValue( stiffnessFlag );
}
//
// Set iterations to 1, and compare the vertex positions to input mesh points. This will determine which verts are
// degenerate and should have stiffness values of 1.0
MObject degenerateVert;
bool stiffnessWarning = false;
deformerPlug = deformerFnDepNode.findPlug("iterations");
deformerPlug.setValue( 1 );
deformerPlug = deformerFnDepNode.findPlug("nodeState");
deformerPlug.setValue( 0 );
deformerPlug = deformerFnDepNode.findPlug("enableScaleSafe");
deformerPlug.setValue( false );
degenerateVertIds.clear();
for(vertIter.reset( selectedItem ); !vertIter.isDone(); vertIter.next() ){
int currVrtId = vertIter.index();
if(!vertIter.position(MSpace::kWorld).isEquivalent( inputPts[currVrtId], .00001)){
degenerateVert = vertIter.currentItem();
degenerateVertList.add(selectedItem, degenerateVert);
stiffnessWarning = true;
degenerateVertIds.append(currVrtId);
}
}
// iterate through one more time to find degenerate verts... this time with scale safe on
// to find degenerate scale safe verts
deformerPlug = deformerFnDepNode.findPlug("enableScaleSafe");
deformerPlug.setValue( true );
for(vertIter.reset( selectedItem ); !vertIter.isDone(); vertIter.next() ){
int currVrtId = vertIter.index();
if(!vertIter.position(MSpace::kWorld).isEquivalent( inputPts[currVrtId], .00001)){
degenerateVert = vertIter.currentItem();
degenerateVertList.add(selectedItem, degenerateVert);
stiffnessWarning = true;
degenerateVertIds.append(currVrtId);
}
}
//Turn off the deformer again while we modify the actual stiffness values: optimization
deformerPlug = deformerFnDepNode.findPlug("nodeState");
deformerPlug.setValue( 1 );
for(int degenItr = 0; degenItr < degenerateVertIds.length(); degenItr++){
deformerPlug = deformerFnDepNode.findPlug("stiffnessList");
deformerPlug = deformerPlug.elementByLogicalIndex(0);
deformerPlug = deformerPlug.child(0);
// Now get the actual stiffness plug
deformerPlug = deformerPlug.elementByLogicalIndex(degenerateVertIds[degenItr]);
deformerPlug.setValue( 1.0 );
}
if(stiffnessWarning){
MGlobal::displayWarning("Warning: StretchMesh stiffness has been set to 1.0 for one or more vertices. See documentation for details.");
MGlobal::setActiveSelectionList(degenerateVertList);
}
// Last thing we need to do: set the iterations step to something reasonable. It defaults to zero so the deformer
// isn't trying to evaluate itself during the initialization procedure above:
deformerPlug = deformerFnDepNode.findPlug("iterations");
deformerPlug.setValue( iterationFlag );
deformerPlug = deformerFnDepNode.findPlug("collisionStep");
deformerPlug.setValue( collisionStepFlag );
deformerPlug = deformerFnDepNode.findPlug("collisions");
deformerPlug.setValue( collisionFlag );
deformerPlug = deformerFnDepNode.findPlug("enableScaleSafe");
deformerPlug.setValue( scaleSafeFlag );
// add collisions if there are any
if(addColliderFlagSet){
addCollider();
}
// add attractors
if(addAttractorFlagSet){
addAttractor();
}
deformerPlug = deformerFnDepNode.findPlug("nodeState");
deformerPlug.setValue( 0 );
}
}
dgModifier.doIt();
setResult( melResult );
return MS::kSuccess;
}
MStatus stretchMeshCmd::undoIt()
//
// Description
// the undo routine
//
{
if(isEditMode){
MPlug stretchMeshPlug;
// If we're in edit mode, undo anything done in edit mode
if(collisionStepFlagSet){
stretchMeshPlug = deformerFnDepNode.findPlug("collisionStep");
stretchMeshPlug.setValue( collisionStepOrig );
}
if(iterationFlagSet){
stretchMeshPlug = deformerFnDepNode.findPlug("iterations");
stretchMeshPlug.setValue( iterationOrig );
}
if(stiffnessFlagSet){
// set the stiffness values to original values
for(int itr = 0; itr < stiffnessOrigArray.length(); itr++){
stretchMeshPlug = deformerFnDepNode.findPlug("stiffnessList");
stretchMeshPlug = stretchMeshPlug.elementByLogicalIndex(0);
stretchMeshPlug = stretchMeshPlug.child(0);
stretchMeshPlug = stretchMeshPlug.elementByLogicalIndex(itr);
stretchMeshPlug.setValue( stiffnessOrigArray[itr] );
}
}
if(collisionFlagSet){
stretchMeshPlug = deformerFnDepNode.findPlug("collisions");
stretchMeshPlug.setValue( collisionsOrig );
}
if(addColliderFlagSet){
dgModifier.undoIt();
}
if(addAttractorFlagSet){
dgModifier.undoIt();
}
if(scaleSafeFlagSet){
stretchMeshPlug = deformerFnDepNode.findPlug("enableScaleSafe");
stretchMeshPlug.setValue( scaleSafeOrig );
}
}else{
// ...otherwise, delete any stretchMesh nodes that were created.
for(int i = 0; i < stretchMeshesCreated.length(); i++){
MGlobal::executeCommand("delete " + stretchMeshesCreated[i]);
}
}
return MS::kSuccess;
}
bool stretchMeshCmd::isUndoable() const
//
// Description
// Make the command eligable for undo.
//
{
return true;
}
bool stretchMeshCmd::getConnectedVerts(MItMeshVertex& meshIter, MIntArray& connVerts, int currVertIndex)
{
meshIter.getConnectedVertices(connVerts);
MIntArray scndDegreeConnVerts;
MIntArray connVertsDup = connVerts;
// for each connected vertex, find the connected vertices and add them to the connVerts
// array
for(int connVertsIter = 0; connVertsIter < connVertsDup.length(); connVertsIter++){
int prevIndex;
meshIter.setIndex(connVertsDup[connVertsIter], prevIndex);
meshIter.getConnectedVertices(scndDegreeConnVerts);
for(int vertIter = 0; vertIter < scndDegreeConnVerts.length(); vertIter++){
// MGlobal::displayInfo(MString("Hello!"));
//first, check that this vert isn't already in the connVertsArray
bool vertIdIsDuplicate = false;
for(int i = 0; i < connVerts.length(); i++){
if(connVerts[i] == scndDegreeConnVerts[vertIter]){
vertIdIsDuplicate=true;
}
}
if(scndDegreeConnVerts[vertIter] != currVertIndex && !vertIdIsDuplicate){
connVerts.append(scndDegreeConnVerts[vertIter]);
}
}
}
/* // iterate through the connected verts array and only add non-duplicate verts
connVertsDup = connVerts;
MIntArray connVertsResult = connVerts;
MIntArray vertIDsToRemove;
for(int i = 0; i < connVerts.length(); i++){
for(int j = 0 ; j < connVerts.length(); j++){
// MGlobal::displayInfo(MString("Greetings!"));
if(connVerts[i] == connVerts[j]){
vertIDsToRemove.append(i);
}
}
}
//bubble sort the verIDsToRemove array
bubbleSort(vertIDsToRemove);
// bubbleSort(connVertsResult);
for(int i=0; i<vertIDsToRemove.length(); i++){
MGlobal::displayInfo(MString("\tvert id to remove") + (vertIDsToRemove[i]-i));
connVertsResult.remove(vertIDsToRemove[i]-i);
}
connVerts = connVertsResult;
*/
return true;
}
bool stretchMeshCmd::bubbleSort(MIntArray& vertsToRemove)
{
bool swapped;
do
{
swapped=false;
for(int i=0; i < (vertsToRemove.length()-1); i++){
if(vertsToRemove[i] > vertsToRemove[i+1]){
int swap1 = vertsToRemove[i];
int swap2 = vertsToRemove[i+1];
vertsToRemove[i] = swap2;
vertsToRemove[i+1] = swap1;
swapped = true;
}
}
}while(swapped);
return true;
}
/*procedure bubbleSort( A : list of sortable items ) defined as:
do
swapped := false
for each i in 0 to length(A) - 2 inclusive do:
if A[i] > A[i+1] then
swap( A[i], A[i+1] )
swapped := true
end if
end for
while swapped
end procedure
*/
MVector stretchMeshCmd::getCurrNormal(MPointArray& inputPts, MIntArray& connVerts)
{
// Compute the average position of all the connected verts (the "l" term in the paper)
MVector vrtAvg(0.0, 0.0, 0.0);
MVector crossSum(0.0, 0.0, 0.0);
MVector vec_1;
MVector vec_2;
MVector cross(0.0, 0.0, 0.0);
MVector cross_sum(0.0, 0.0, 0.0);
MPoint pt;
MPoint pt_1;
MPoint pt_2;
for(unsigned int i = 0; i < connVerts.length(); i++){
pt = inputPts[connVerts[i]];
vrtAvg.x = vrtAvg.x + pt.x;
vrtAvg.y = vrtAvg.y + pt.y;
vrtAvg.z = vrtAvg.z + pt.z;
}
vrtAvg.x = vrtAvg.x/connVerts.length();
vrtAvg.y = vrtAvg.y/connVerts.length();
vrtAvg.z = vrtAvg.z/connVerts.length();
// next, we need to sum the cross products between adjacent verts and the vrt_avg
for(unsigned int i = 0; i < connVerts.length(); i++){
pt_1 = inputPts[connVerts[(i+1)%connVerts.length()]];
vec_1.x = pt_1.x; vec_1.y = pt_1.y; vec_1.z = pt_1.z;
pt_2 = inputPts[connVerts[i]];
vec_2.x = pt_2.x; vec_2.y = pt_2.y; vec_2.z = pt_2.z;
cross = vec_1^vec_2;
cross_sum = cross_sum + cross;
}
cross_sum.normalize();
return cross_sum;
}
MVector stretchMeshCmd::projectVrtToPlane(MVector vrt, MVector nrml, double d)
{
// Using the algorithm described in the paper...
double x;
MVector vrtProj;
x = d + (vrt*nrml);
vrtProj = x*nrml;
vrtProj = vrt - vrtProj;
return vrtProj;
}
bool stretchMeshCmd::addCollider()
{