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InputParticle.C
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InputParticle.C
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#include "InputParticle.h"
#include <maya/MFnAttribute.h>
#include <maya/MFnParticleSystem.h>
#include <maya/MDoubleArray.h>
#include <maya/MGlobal.h>
#include <maya/MMatrix.h>
#include <maya/MPlug.h>
#include <maya/MPlugArray.h>
#include <maya/MStringArray.h>
#include <maya/MVectorArray.h>
#include "hapiutil.h"
#include "util.h"
InputParticle::InputParticle() :
Input()
{
Util::PythonInterpreterLock pythonInterpreterLock;
HAPI_NodeId nodeId;
CHECK_HAPI(HAPI_CreateInputNode(
Util::theHAPISession.get(),
&nodeId,
NULL
));
if(!Util::statusCheckLoop())
{
DISPLAY_ERROR(MString("Unexpected error when creating input asset."));
}
HAPI_NodeInfo nodeInfo;
HAPI_GetNodeInfo(
Util::theHAPISession.get(),
nodeId,
&nodeInfo
);
setTransformNodeId(nodeInfo.parentId);
setGeometryNodeId(nodeId);
}
InputParticle::~InputParticle()
{
CHECK_HAPI(HAPI_DeleteNode(
Util::theHAPISession.get(),
geometryNodeId()
));
}
Input::AssetInputType
InputParticle::assetInputType() const
{
return Input::AssetInputType_Particle;
}
void
InputParticle::setAttributePointData(
const char* attributeName,
HAPI_StorageType storage,
int count,
int tupleSize,
void* data
)
{
HAPI_AttributeInfo attributeInfo;
attributeInfo.exists = true;
attributeInfo.owner = HAPI_ATTROWNER_POINT;
attributeInfo.storage = storage;
attributeInfo.count = count;
attributeInfo.tupleSize = tupleSize;
HAPI_AddAttribute(
Util::theHAPISession.get(),
geometryNodeId(), 0,
attributeName,
&attributeInfo
);
switch(storage)
{
case HAPI_STORAGETYPE_FLOAT:
HAPI_SetAttributeFloatData(
Util::theHAPISession.get(),
geometryNodeId(), 0,
attributeName,
&attributeInfo,
static_cast<float*>(data),
0, count
);
break;
case HAPI_STORAGETYPE_INT:
HAPI_SetAttributeIntData(
Util::theHAPISession.get(),
geometryNodeId(), 0,
attributeName,
&attributeInfo,
static_cast<int*>(data),
0, count
);
break;
default:
break;
}
}
void
InputParticle::setInputGeo(
MDataBlock &dataBlock,
const MPlug &plug
)
{
MStatus status;
// get particle node
MObject particleObj;
{
MPlug srcPlug = Util::plugSource(plug);
if(!srcPlug.isNull())
{
particleObj = srcPlug.node();
}
}
if(particleObj.isNull())
{
return;
}
MFnParticleSystem particleFn(particleObj);
// get original particle node
MObject originalParticleObj;
// status parameter is needed due to a bug in Maya API
if(particleFn.isDeformedParticleShape(&status))
{
originalParticleObj = particleFn.originalParticleShape(&status);
}
else
{
originalParticleObj = particleObj;
}
MFnParticleSystem originalParticleFn(originalParticleObj);
// set up part info
HAPI_PartInfo partInfo;
HAPI_PartInfo_Init(&partInfo);
partInfo.id = 0;
partInfo.faceCount = 0;
partInfo.vertexCount = 0;
partInfo.pointCount = particleFn.count();
HAPI_SetPartInfo(
Util::theHAPISession.get(),
geometryNodeId(), 0,
&partInfo
);
// set per-particle attributes
{
// id
{
MIntArray ids;
// Must get the IDs from the original particle node. Maya will
// crash if we try to get the IDs from the deformed particle node.
originalParticleFn.particleIds(ids);
CHECK_HAPI(hapiSetPointAttribute(
geometryNodeId(), 0,
1,
"id",
ids
));
}
// vector attributes
{
MVectorArray vectorArray;
// query the original particle for names of the per-particle
// attributes
MString getAttributesCommand = "particle -q -perParticleVector ";
getAttributesCommand += originalParticleFn.fullPathName();
// get the per-particle attribute names
MStringArray attributeNames;
MGlobal::executeCommand(getAttributesCommand, attributeNames);
for(unsigned int i = 0; i < attributeNames.length(); i++)
{
const MString attributeName = attributeNames[i];
MObject attributeObj = originalParticleFn.attribute(attributeName);
if(attributeObj.isNull())
{
continue;
}
// mimics "listAttr -v -w" from AEokayAttr
MFnAttribute attributeFn(attributeObj);
if(!(!attributeFn.isHidden() && attributeFn.isWritable())
&& (attributeName != "age"
&& attributeName != "finalLifespanPP"))
{
continue;
}
// get the per-particle data
if(attributeName == "position")
{
// Need to use position() so that we get the right
// positions in the case of deformed particles.
particleFn.position(vectorArray);
}
else
{
// Maya will automatically use the original
// particle node in the case of deformed particles.
particleFn.getPerParticleAttribute(
attributeName,
vectorArray
);
}
// When particle node is initially loaded from a scene file, if
// the attribute is driven by expressions, then
// MFnParticleSystem doesn't initially seem to have data.
if(partInfo.pointCount != (int) vectorArray.length())
{
vectorArray.setLength(partInfo.pointCount);
}
// map the attribute name
const char* mappedAttributeName = attributeName.asChar();
if(strcmp(mappedAttributeName, "position") == 0)
{
mappedAttributeName = "P";
}
else if(strcmp(mappedAttributeName, "velocity") == 0)
{
mappedAttributeName = "v";
}
else if(strcmp(mappedAttributeName, "acceleration") == 0)
{
mappedAttributeName = "force";
}
else if(strcmp(mappedAttributeName, "rgbPP") == 0)
{
mappedAttributeName = "Cd";
}
CHECK_HAPI(hapiSetPointAttribute(
geometryNodeId(), 0,
3,
mappedAttributeName,
Util::reshapeArray<
3,
std::vector<double>
>(vectorArray)
));
}
}
// double attributes
{
MDoubleArray doubleArray;
// query the original particle for names of the per-particle
// attributes
MString getAttributesCommand = "particle -q -perParticleDouble ";
getAttributesCommand += originalParticleFn.fullPathName();
// get the per-particle attribute names
MStringArray attributeNames;
MGlobal::executeCommand(getAttributesCommand, attributeNames);
// explicitly include some special per-particle attributes that
// aren't returned by the MEL command
attributeNames.append("age");
for(unsigned int i = 0; i < attributeNames.length(); i++)
{
const MString attributeName = attributeNames[i];
MObject attributeObj = originalParticleFn.attribute(attributeName);
if(attributeObj.isNull())
{
continue;
}
// mimics "listAttr -v -w" from AEokayAttr
MFnAttribute attributeFn(attributeObj);
if(!(!attributeFn.isHidden() && attributeFn.isWritable())
&& (attributeName != "age"
&& attributeName != "finalLifespanPP"))
{
continue;
}
// get the per-particle data
// Maya will automatically use the original
// particle node in the case of deformed particles.
particleFn.getPerParticleAttribute(
attributeName,
doubleArray
);
// When particle node is initially loaded from a scene file, if
// the attribute is driven by expressions, then
// MFnParticleSystem doesn't initially seem to have data.
if(partInfo.pointCount != (int) doubleArray.length())
{
doubleArray.setLength(partInfo.pointCount);
}
// map the parameter name
const char* mappedAttributeName = attributeName.asChar();
if(strcmp(mappedAttributeName, "opacityPP") == 0)
{
mappedAttributeName = "Alpha";
}
else if(strcmp(mappedAttributeName, "radiusPP") == 0)
{
mappedAttributeName = "pscale";
}
else if(strcmp(mappedAttributeName, "finalLifespanPP") == 0)
{
mappedAttributeName = "life";
}
CHECK_HAPI(hapiSetPointAttribute(
geometryNodeId(), 0,
1,
mappedAttributeName,
doubleArray
));
}
}
}
Input::setInputName(
geometryNodeId(), 0,
HAPI_ATTROWNER_POINT, partInfo.pointCount,
plug
);
// Commit it
HAPI_CommitGeo(
Util::theHAPISession.get(),
geometryNodeId()
);
}