337 lines
15 KiB
C++
337 lines
15 KiB
C++
#include <QFile>
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#include <QQuaternion>
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#include <QByteArray>
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#include <QDataStream>
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#include <QFileInfo>
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#include <QDir>
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#include <QtCore/qbuffer.h>
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#include "glb_file.h"
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#include "version.h"
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#include "model.h"
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bool GlbFileWriter::m_enableComment = false;
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GlbFileWriter::GlbFileWriter(dust3d::Object &object,
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const QString &filename,
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QImage *textureImage,
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QImage *normalImage,
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QImage *ormImage) :
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m_filename(filename)
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{
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const std::vector<std::vector<dust3d::Vector3>> *triangleVertexNormals = object.triangleVertexNormals();
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if (m_outputNormal) {
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m_outputNormal = nullptr != triangleVertexNormals;
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}
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const std::vector<std::vector<dust3d::Vector2>> *triangleVertexUvs = object.triangleVertexUvs();
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if (m_outputUv) {
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m_outputUv = nullptr != triangleVertexUvs;
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}
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QDataStream binStream(&m_binByteArray, QIODevice::WriteOnly);
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binStream.setFloatingPointPrecision(QDataStream::SinglePrecision);
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binStream.setByteOrder(QDataStream::LittleEndian);
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auto alignBin = [this, &binStream] {
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while (0 != this->m_binByteArray.size() % 4) {
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binStream << (quint8)0;
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}
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};
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QDataStream jsonStream(&m_jsonByteArray, QIODevice::WriteOnly);
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jsonStream.setFloatingPointPrecision(QDataStream::SinglePrecision);
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jsonStream.setByteOrder(QDataStream::LittleEndian);
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auto alignJson = [this, &jsonStream] {
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while (0 != this->m_jsonByteArray.size() % 4) {
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jsonStream << (quint8)' ';
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}
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};
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int bufferViewIndex = 0;
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int bufferViewFromOffset;
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m_json["asset"]["version"] = "2.0";
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m_json["asset"]["generator"] = APP_NAME " " APP_HUMAN_VER;
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m_json["scenes"][0]["nodes"] = {0};
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m_json["nodes"][0]["mesh"] = 0;
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std::vector<dust3d::Vector3> triangleVertexPositions;
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std::vector<size_t> triangleVertexOldIndices;
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for (const auto &triangleIndices: object.triangles) {
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for (size_t j = 0; j < 3; ++j) {
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triangleVertexOldIndices.push_back(triangleIndices[j]);
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triangleVertexPositions.push_back(object.vertices[triangleIndices[j]]);
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}
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}
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int primitiveIndex = 0;
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if (!triangleVertexPositions.empty()) {
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m_json["meshes"][0]["primitives"][primitiveIndex]["indices"] = bufferViewIndex;
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m_json["meshes"][0]["primitives"][primitiveIndex]["material"] = primitiveIndex;
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int attributeIndex = 0;
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m_json["meshes"][0]["primitives"][primitiveIndex]["attributes"]["POSITION"] = bufferViewIndex + (++attributeIndex);
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if (m_outputNormal)
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m_json["meshes"][0]["primitives"][primitiveIndex]["attributes"]["NORMAL"] = bufferViewIndex + (++attributeIndex);
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if (m_outputUv)
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m_json["meshes"][0]["primitives"][primitiveIndex]["attributes"]["TEXCOORD_0"] = bufferViewIndex + (++attributeIndex);
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int textureIndex = 0;
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m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["baseColorTexture"]["index"] = textureIndex++;
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m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["metallicFactor"] = Model::m_defaultMetalness;
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m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["roughnessFactor"] = Model::m_defaultRoughness;
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if (object.alphaEnabled)
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m_json["materials"][primitiveIndex]["alphaMode"] = "BLEND";
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if (normalImage) {
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m_json["materials"][primitiveIndex]["normalTexture"]["index"] = textureIndex++;
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}
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if (ormImage) {
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m_json["materials"][primitiveIndex]["occlusionTexture"]["index"] = textureIndex;
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m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["metallicRoughnessTexture"]["index"] = textureIndex;
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m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["metallicFactor"] = 1.0;
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m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["roughnessFactor"] = 1.0;
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textureIndex++;
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}
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primitiveIndex++;
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bufferViewFromOffset = (int)m_binByteArray.size();
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for (size_t index = 0; index < triangleVertexPositions.size(); index += 3) {
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binStream << (quint16)index << (quint16)(index + 1) << (quint16)(index + 2);
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}
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m_json["bufferViews"][bufferViewIndex]["buffer"] = 0;
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m_json["bufferViews"][bufferViewIndex]["byteOffset"] = bufferViewFromOffset;
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m_json["bufferViews"][bufferViewIndex]["byteLength"] = (int)triangleVertexPositions.size() * sizeof(quint16);
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m_json["bufferViews"][bufferViewIndex]["target"] = 34963;
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Q_ASSERT((int)triangleVertexPositions.size() * sizeof(quint16) == m_binByteArray.size() - bufferViewFromOffset);
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alignBin();
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if (m_enableComment)
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m_json["accessors"][bufferViewIndex]["__comment"] = QString("/accessors/%1: triangle indices").arg(QString::number(bufferViewIndex)).toUtf8().constData();
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m_json["accessors"][bufferViewIndex]["bufferView"] = bufferViewIndex;
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m_json["accessors"][bufferViewIndex]["byteOffset"] = 0;
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m_json["accessors"][bufferViewIndex]["componentType"] = 5123;
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m_json["accessors"][bufferViewIndex]["count"] = triangleVertexPositions.size();
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m_json["accessors"][bufferViewIndex]["type"] = "SCALAR";
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bufferViewIndex++;
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bufferViewFromOffset = (int)m_binByteArray.size();
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m_json["bufferViews"][bufferViewIndex]["buffer"] = 0;
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m_json["bufferViews"][bufferViewIndex]["byteOffset"] = bufferViewFromOffset;
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float minX = 100;
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float maxX = -100;
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float minY = 100;
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float maxY = -100;
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float minZ = 100;
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float maxZ = -100;
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for (const auto &position: triangleVertexPositions) {
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if (position.x() < minX)
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minX = position.x();
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if (position.x() > maxX)
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maxX = position.x();
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if (position.y() < minY)
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minY = position.y();
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if (position.y() > maxY)
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maxY = position.y();
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if (position.z() < minZ)
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minZ = position.z();
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if (position.z() > maxZ)
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maxZ = position.z();
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binStream << (float)position.x() << (float)position.y() << (float)position.z();
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}
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Q_ASSERT((int)triangleVertexPositions.size() * 3 * sizeof(float) == m_binByteArray.size() - bufferViewFromOffset);
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m_json["bufferViews"][bufferViewIndex]["byteLength"] = triangleVertexPositions.size() * 3 * sizeof(float);
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m_json["bufferViews"][bufferViewIndex]["target"] = 34962;
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alignBin();
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if (m_enableComment)
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m_json["accessors"][bufferViewIndex]["__comment"] = QString("/accessors/%1: xyz").arg(QString::number(bufferViewIndex)).toUtf8().constData();
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m_json["accessors"][bufferViewIndex]["bufferView"] = bufferViewIndex;
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m_json["accessors"][bufferViewIndex]["byteOffset"] = 0;
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m_json["accessors"][bufferViewIndex]["componentType"] = 5126;
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m_json["accessors"][bufferViewIndex]["count"] = triangleVertexPositions.size();
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m_json["accessors"][bufferViewIndex]["type"] = "VEC3";
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m_json["accessors"][bufferViewIndex]["max"] = {maxX, maxY, maxZ};
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m_json["accessors"][bufferViewIndex]["min"] = {minX, minY, minZ};
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bufferViewIndex++;
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if (m_outputNormal) {
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bufferViewFromOffset = (int)m_binByteArray.size();
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m_json["bufferViews"][bufferViewIndex]["buffer"] = 0;
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m_json["bufferViews"][bufferViewIndex]["byteOffset"] = bufferViewFromOffset;
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QStringList normalList;
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for (const auto &normals: (*triangleVertexNormals)) {
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for (const auto &it: normals) {
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binStream << (float)it.x() << (float)it.y() << (float)it.z();
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if (m_enableComment && m_outputNormal)
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normalList.append(QString("<%1,%2,%3>").arg(QString::number(it.x())).arg(QString::number(it.y())).arg(QString::number(it.z())));
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}
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}
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Q_ASSERT((int)triangleVertexNormals->size() * 3 * 3 * sizeof(float) == m_binByteArray.size() - bufferViewFromOffset);
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m_json["bufferViews"][bufferViewIndex]["byteLength"] = triangleVertexNormals->size() * 3 * 3 * sizeof(float);
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m_json["bufferViews"][bufferViewIndex]["target"] = 34962;
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alignBin();
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if (m_enableComment)
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m_json["accessors"][bufferViewIndex]["__comment"] = QString("/accessors/%1: normal %2").arg(QString::number(bufferViewIndex)).arg(normalList.join(" ")).toUtf8().constData();
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m_json["accessors"][bufferViewIndex]["bufferView"] = bufferViewIndex;
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m_json["accessors"][bufferViewIndex]["byteOffset"] = 0;
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m_json["accessors"][bufferViewIndex]["componentType"] = 5126;
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m_json["accessors"][bufferViewIndex]["count"] = triangleVertexNormals->size() * 3;
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m_json["accessors"][bufferViewIndex]["type"] = "VEC3";
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bufferViewIndex++;
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}
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if (m_outputUv) {
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bufferViewFromOffset = (int)m_binByteArray.size();
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m_json["bufferViews"][bufferViewIndex]["buffer"] = 0;
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m_json["bufferViews"][bufferViewIndex]["byteOffset"] = bufferViewFromOffset;
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for (const auto &uvs: (*triangleVertexUvs)) {
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for (const auto &it: uvs)
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binStream << (float)it.x() << (float)it.y();
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}
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m_json["bufferViews"][bufferViewIndex]["byteLength"] = m_binByteArray.size() - bufferViewFromOffset;
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alignBin();
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if (m_enableComment)
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m_json["accessors"][bufferViewIndex]["__comment"] = QString("/accessors/%1: uv").arg(QString::number(bufferViewIndex)).toUtf8().constData();
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m_json["accessors"][bufferViewIndex]["bufferView"] = bufferViewIndex;
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m_json["accessors"][bufferViewIndex]["byteOffset"] = 0;
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m_json["accessors"][bufferViewIndex]["componentType"] = 5126;
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m_json["accessors"][bufferViewIndex]["count"] = triangleVertexUvs->size() * 3;
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m_json["accessors"][bufferViewIndex]["type"] = "VEC2";
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bufferViewIndex++;
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}
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}
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m_json["samplers"][0]["magFilter"] = 9729;
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m_json["samplers"][0]["minFilter"] = 9987;
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m_json["samplers"][0]["wrapS"] = 33648;
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m_json["samplers"][0]["wrapT"] = 33648;
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int imageIndex = 0;
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int textureIndex = 0;
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// Images should be put in the end of the buffer, because we are not using accessors
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if (nullptr != textureImage) {
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m_json["textures"][textureIndex]["sampler"] = 0;
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m_json["textures"][textureIndex]["source"] = imageIndex;
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bufferViewFromOffset = (int)m_binByteArray.size();
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m_json["bufferViews"][bufferViewIndex]["buffer"] = 0;
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m_json["bufferViews"][bufferViewIndex]["byteOffset"] = bufferViewFromOffset;
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QByteArray pngByteArray;
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QBuffer buffer(&pngByteArray);
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textureImage->save(&buffer, "PNG");
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binStream.writeRawData(pngByteArray.data(), pngByteArray.size());
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alignBin();
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m_json["bufferViews"][bufferViewIndex]["byteLength"] = m_binByteArray.size() - bufferViewFromOffset;
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m_json["images"][imageIndex]["bufferView"] = bufferViewIndex;
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m_json["images"][imageIndex]["mimeType"] = "image/png";
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bufferViewIndex++;
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imageIndex++;
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textureIndex++;
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}
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if (nullptr != normalImage) {
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m_json["textures"][textureIndex]["sampler"] = 0;
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m_json["textures"][textureIndex]["source"] = imageIndex;
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bufferViewFromOffset = (int)m_binByteArray.size();
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m_json["bufferViews"][bufferViewIndex]["buffer"] = 0;
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m_json["bufferViews"][bufferViewIndex]["byteOffset"] = bufferViewFromOffset;
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QByteArray pngByteArray;
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QBuffer buffer(&pngByteArray);
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normalImage->save(&buffer, "PNG");
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binStream.writeRawData(pngByteArray.data(), pngByteArray.size());
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alignBin();
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m_json["bufferViews"][bufferViewIndex]["byteLength"] = m_binByteArray.size() - bufferViewFromOffset;
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m_json["images"][imageIndex]["bufferView"] = bufferViewIndex;
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m_json["images"][imageIndex]["mimeType"] = "image/png";
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bufferViewIndex++;
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imageIndex++;
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textureIndex++;
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}
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if (nullptr != ormImage) {
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m_json["textures"][textureIndex]["sampler"] = 0;
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m_json["textures"][textureIndex]["source"] = imageIndex;
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bufferViewFromOffset = (int)m_binByteArray.size();
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m_json["bufferViews"][bufferViewIndex]["buffer"] = 0;
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m_json["bufferViews"][bufferViewIndex]["byteOffset"] = bufferViewFromOffset;
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QByteArray pngByteArray;
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QBuffer buffer(&pngByteArray);
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ormImage->save(&buffer, "PNG");
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binStream.writeRawData(pngByteArray.data(), pngByteArray.size());
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alignBin();
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m_json["bufferViews"][bufferViewIndex]["byteLength"] = m_binByteArray.size() - bufferViewFromOffset;
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m_json["images"][imageIndex]["bufferView"] = bufferViewIndex;
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m_json["images"][imageIndex]["mimeType"] = "image/png";
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bufferViewIndex++;
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imageIndex++;
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textureIndex++;
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}
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m_json["buffers"][0]["byteLength"] = m_binByteArray.size();
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auto jsonString = m_enableComment ? m_json.dump(4) : m_json.dump();
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jsonStream.writeRawData(jsonString.data(), jsonString.size());
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alignJson();
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}
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bool GlbFileWriter::save()
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{
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QFile file(m_filename);
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if (!file.open(QIODevice::WriteOnly)) {
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return false;
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}
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QDataStream output(&file);
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output.setFloatingPointPrecision(QDataStream::SinglePrecision);
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output.setByteOrder(QDataStream::LittleEndian);
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uint32_t headerSize = 12;
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uint32_t chunk0DescriptionSize = 8;
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uint32_t chunk1DescriptionSize = 8;
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uint32_t fileSize = headerSize +
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chunk0DescriptionSize + m_jsonByteArray.size() +
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chunk1DescriptionSize + m_binByteArray.size();
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qDebug() << "Chunk 0 data size:" << m_jsonByteArray.size();
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qDebug() << "Chunk 1 data size:" << m_binByteArray.size();
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qDebug() << "File size:" << fileSize;
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//////////// Header ////////////
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// magic
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output << (uint32_t)0x46546C67;
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// version
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output << (uint32_t)0x00000002;
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// length
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output << (uint32_t)fileSize;
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//////////// Chunk 0 (Json) ////////////
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// length
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output << (uint32_t)m_jsonByteArray.size();
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// type
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output << (uint32_t)0x4E4F534A;
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// data
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output.writeRawData(m_jsonByteArray.data(), m_jsonByteArray.size());
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//////////// Chunk 1 (Binary Buffer) ///
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// length
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output << (uint32_t)m_binByteArray.size();
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// type
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output << (uint32_t)0x004E4942;
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// data
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output.writeRawData(m_binByteArray.data(), m_binByteArray.size());
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return true;
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}
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