assimp/code/AssetLib/FBX/FBXDeformer.cpp

/*
Open Asset Import Library (assimp)
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  following disclaimer.

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*/

/** @file  FBXNoteAttribute.cpp
 *  @brief Assimp::FBX::NodeAttribute (and subclasses) implementation
 */

#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER

#include "FBXParser.h"
#include "FBXDocument.h"
#include "FBXMeshGeometry.h"
#include "FBXImporter.h"
#include "FBXDocumentUtil.h"

namespace Assimp {
namespace FBX {

using namespace Util;

// ------------------------------------------------------------------------------------------------
Deformer::Deformer(uint64_t id, const Element& element, const Document& doc, const std::string& name) :
        Object(id,element,name) {
    const Scope& sc = GetRequiredScope(element);

    const std::string& classname = ParseTokenAsString(GetRequiredToken(element,2));
    props = GetPropertyTable(doc,"Deformer.Fbx" + classname,element,sc,true);
}

// ------------------------------------------------------------------------------------------------
Deformer::~Deformer() = default;

// ------------------------------------------------------------------------------------------------
Cluster::Cluster(uint64_t id, const Element& element, const Document& doc, const std::string& name)
: Deformer(id,element,doc,name)
, node()
{
    const Scope& sc = GetRequiredScope(element);

    const Element* const Indexes = sc["Indexes"];
    const Element* const Weights = sc["Weights"];

    const Element& Transform = GetRequiredElement(sc,"Transform",&element);
    const Element& TransformLink = GetRequiredElement(sc,"TransformLink",&element);

    transform = ReadMatrix(Transform);
    transformLink = ReadMatrix(TransformLink);

    // it is actually possible that there be Deformer's with no weights
    if (!!Indexes != !!Weights) {
        DOMError("either Indexes or Weights are missing from Cluster",&element);
    }

    if(Indexes) {
        ParseVectorDataArray(indices,*Indexes);
        ParseVectorDataArray(weights,*Weights);
    }

    if(indices.size() != weights.size()) {
        DOMError("sizes of index and weight array don't match up",&element);
    }

    // read assigned node
    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"Model");
    for(const Connection* con : conns) {
        const Model* const mod = ProcessSimpleConnection<Model>(*con, false, "Model -> Cluster", element);
        if(mod) {
            node = mod;
            break;
        }
    }

    if (!node) {
        DOMError("failed to read target Node for Cluster",&element);
    }
}


// ------------------------------------------------------------------------------------------------
Cluster::~Cluster() = default;

// ------------------------------------------------------------------------------------------------
Skin::Skin(uint64_t id, const Element& element, const Document& doc, const std::string& name)
: Deformer(id,element,doc,name)
, accuracy( 0.0f ) {
    const Scope& sc = GetRequiredScope(element);

    const Element* const Link_DeformAcuracy = sc["Link_DeformAcuracy"];
    if(Link_DeformAcuracy) {
        accuracy = ParseTokenAsFloat(GetRequiredToken(*Link_DeformAcuracy,0));
    }

    // resolve assigned clusters
    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"Deformer");

    clusters.reserve(conns.size());
    for(const Connection* con : conns) {

        const Cluster* const cluster = ProcessSimpleConnection<Cluster>(*con, false, "Cluster -> Skin", element);
        if(cluster) {
            clusters.push_back(cluster);
            continue;
        }
    }
}


// ------------------------------------------------------------------------------------------------
Skin::~Skin() = default;
// ------------------------------------------------------------------------------------------------
BlendShape::BlendShape(uint64_t id, const Element& element, const Document& doc, const std::string& name)
    : Deformer(id, element, doc, name)
{
    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(), "Deformer");
    blendShapeChannels.reserve(conns.size());
    for (const Connection* con : conns) {
        const BlendShapeChannel* const bspc = ProcessSimpleConnection<BlendShapeChannel>(*con, false, "BlendShapeChannel -> BlendShape", element);
        if (bspc) {
            blendShapeChannels.push_back(bspc);
            continue;
        }
    }
}
// ------------------------------------------------------------------------------------------------
BlendShape::~BlendShape() = default;
// ------------------------------------------------------------------------------------------------
BlendShapeChannel::BlendShapeChannel(uint64_t id, const Element& element, const Document& doc, const std::string& name)
    : Deformer(id, element, doc, name)
{
    const Scope& sc = GetRequiredScope(element);
    const Element* const DeformPercent = sc["DeformPercent"];
    if (DeformPercent) {
        percent = ParseTokenAsFloat(GetRequiredToken(*DeformPercent, 0));
    }
    const Element* const FullWeights = sc["FullWeights"];
    if (FullWeights) {
        ParseVectorDataArray(fullWeights, *FullWeights);
    }
    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(), "Geometry");
    shapeGeometries.reserve(conns.size());
    for (const Connection* con : conns) {
        const ShapeGeometry* const sg = ProcessSimpleConnection<ShapeGeometry>(*con, false, "Shape -> BlendShapeChannel", element);
        if (sg) {
            shapeGeometries.push_back(sg);
            continue;
        }
    }
}
// ------------------------------------------------------------------------------------------------
BlendShapeChannel::~BlendShapeChannel() = default;
// ------------------------------------------------------------------------------------------------
}
}
#endif