////  ModelScriptingInterface.cpp//  libraries/script-engine/src////  Created by Seth Alves on 2017-1-27.//  Copyright 2017 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include <QScriptEngine>#include <QScriptValueIterator>#include <QtScript/QScriptValue>#include "ScriptEngine.h"#include "ModelScriptingInterface.h"#include "OBJWriter.h" ModelScriptingInterface::ModelScriptingInterface(QObject* parent) : QObject(parent) {    _modelScriptEngine = qobject_cast<ScriptEngine*>(parent);} QScriptValue meshToScriptValue(QScriptEngine* engine, MeshProxy* const &in) {    return engine->newQObject(in, QScriptEngine::QtOwnership,                              QScriptEngine::ExcludeDeleteLater | QScriptEngine::ExcludeChildObjects);} void meshFromScriptValue(const QScriptValue& value, MeshProxy* &out) {    out = qobject_cast<MeshProxy*>(value.toQObject());} QScriptValue meshesToScriptValue(QScriptEngine* engine, const MeshProxyList &in) {    return engine->toScriptValue(in);} void meshesFromScriptValue(const QScriptValue& value, MeshProxyList &out) {    QScriptValueIterator itr(value);    while(itr.hasNext()) {        itr.next();        MeshProxy* meshProxy = qscriptvalue_cast<MeshProxyList::value_type>(itr.value());        if (meshProxy) {            out.append(meshProxy);        }    }} QString ModelScriptingInterface::meshToOBJ(MeshProxyList in) {    QList<MeshPointer> meshes;    foreach (const MeshProxy* meshProxy, in) {        meshes.append(meshProxy->getMeshPointer());    }     return writeOBJToString(meshes);} QScriptValue ModelScriptingInterface::appendMeshes(MeshProxyList in) {    // figure out the size of the resulting mesh    size_t totalVertexCount { 0 };    size_t totalAttributeCount { 0 };    size_t totalIndexCount { 0 };    foreach (const MeshProxy* meshProxy, in) {        MeshPointer mesh = meshProxy->getMeshPointer();        totalVertexCount += mesh->getNumVertices();         int attributeTypeNormal = gpu::Stream::InputSlot::NORMAL; // libraries/gpu/src/gpu/Stream.h        const gpu::BufferView& normalsBufferView = mesh->getAttributeBuffer(attributeTypeNormal);        gpu::BufferView::Index numNormals = (gpu::BufferView::Index)normalsBufferView.getNumElements();        totalAttributeCount += numNormals;         totalIndexCount += mesh->getNumIndices();    }     // alloc the resulting mesh    gpu::Resource::Size combinedVertexSize = totalVertexCount * sizeof(glm::vec3);    unsigned char* combinedVertexData  = new unsigned char[combinedVertexSize];    unsigned char* combinedVertexDataCursor = combinedVertexData;     gpu::Resource::Size combinedNormalSize = totalAttributeCount * sizeof(glm::vec3);    unsigned char* combinedNormalData  = new unsigned char[combinedNormalSize];    unsigned char* combinedNormalDataCursor = combinedNormalData;     gpu::Resource::Size combinedIndexSize = totalIndexCount * sizeof(uint32_t);    unsigned char* combinedIndexData  = new unsigned char[combinedIndexSize];    unsigned char* combinedIndexDataCursor = combinedIndexData;     uint32_t indexStartOffset { 0 };     foreach (const MeshProxy* meshProxy, in) {        MeshPointer mesh = meshProxy->getMeshPointer();        mesh->forEach(            [&](glm::vec3 position){                memcpy(combinedVertexDataCursor, &position, sizeof(position));                combinedVertexDataCursor += sizeof(position);            },            [&](glm::vec3 normal){                memcpy(combinedNormalDataCursor, &normal, sizeof(normal));                combinedNormalDataCursor += sizeof(normal);            },            [&](uint32_t index){                index += indexStartOffset;                memcpy(combinedIndexDataCursor, &index, sizeof(index));                combinedIndexDataCursor += sizeof(index);            });         gpu::BufferView::Index numVertices = (gpu::BufferView::Index)mesh->getNumVertices();        indexStartOffset += numVertices;    }     model::MeshPointer result(new model::Mesh());     gpu::Element vertexElement = gpu::Element(gpu::VEC3, gpu::FLOAT, gpu::XYZ);    gpu::Buffer* combinedVertexBuffer = new gpu::Buffer(combinedVertexSize, combinedVertexData);    gpu::BufferPointer combinedVertexBufferPointer(combinedVertexBuffer);    gpu::BufferView combinedVertexBufferView(combinedVertexBufferPointer, vertexElement);    result->setVertexBuffer(combinedVertexBufferView);     int attributeTypeNormal = gpu::Stream::InputSlot::NORMAL; // libraries/gpu/src/gpu/Stream.h    gpu::Element normalElement = gpu::Element(gpu::VEC3, gpu::FLOAT, gpu::XYZ);    gpu::Buffer* combinedNormalsBuffer = new gpu::Buffer(combinedNormalSize, combinedNormalData);    gpu::BufferPointer combinedNormalsBufferPointer(combinedNormalsBuffer);    gpu::BufferView combinedNormalsBufferView(combinedNormalsBufferPointer, normalElement);    result->addAttribute(attributeTypeNormal, combinedNormalsBufferView);     gpu::Element indexElement = gpu::Element(gpu::SCALAR, gpu::UINT32, gpu::RAW);    gpu::Buffer* combinedIndexesBuffer = new gpu::Buffer(combinedIndexSize, combinedIndexData);    gpu::BufferPointer combinedIndexesBufferPointer(combinedIndexesBuffer);    gpu::BufferView combinedIndexesBufferView(combinedIndexesBufferPointer, indexElement);    result->setIndexBuffer(combinedIndexesBufferView);     std::vector<model::Mesh::Part> parts;    parts.emplace_back(model::Mesh::Part((model::Index)0, // startIndex                                         (model::Index)result->getNumIndices(), // numIndices                                         (model::Index)0, // baseVertex                                         model::Mesh::TRIANGLES)); // topology    result->setPartBuffer(gpu::BufferView(new gpu::Buffer(parts.size() * sizeof(model::Mesh::Part),                                                          (gpu::Byte*) parts.data()), gpu::Element::PART_DRAWCALL));      MeshProxy* resultProxy = new MeshProxy(result);    return meshToScriptValue(_modelScriptEngine, resultProxy);}   QScriptValue ModelScriptingInterface::transformMesh(glm::mat4 transform, MeshProxy* meshProxy) {    if (!meshProxy) {        return QScriptValue(false);    }    MeshPointer mesh = meshProxy->getMeshPointer();    if (!mesh) {        return QScriptValue(false);    }     model::MeshPointer result = mesh->map([&](glm::vec3 position){ return glm::vec3(transform * glm::vec4(position, 1.0f)); },                                          [&](glm::vec3 normal){ return glm::vec3(transform * glm::vec4(normal, 0.0f)); },                                          [&](uint32_t index){ return index; });    MeshProxy* resultProxy = new MeshProxy(result);    return meshToScriptValue(_modelScriptEngine, resultProxy);}