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COLLADA2GLTFWriter.cpp
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COLLADA2GLTFWriter.cpp
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// Copyright (c) 2012, Motorola Mobility, Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Motorola Mobility, Inc. nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// reminder; to run recursively against all dae files: find . -name '*.dae' -exec dae2json {} \;
#include "COLLADA2GLTFWriter.h"
#include "GLTFOpenCOLLADAUtils.h"
#include "GLTFExtraDataHandler.h"
#include "COLLADASaxFWLLoader.h"
#include "COLLADAFWFileInfo.h"
#include "GLTF-Open3DGC.h"
#include "profiles/webgl-1.0/GLTFWebGL_1_0_Profile.h"
#include "GitSHA1.h"
#include <algorithm>
#include "commonProfileShaders.h"
#include "helpers/encodingHelpers.h"
#include "COLLADAFWFileInfo.h"
#include "Math/COLLADABUMathPrerequisites.h"
#include "COLLADAFWAnimationList.h"
#if __cplusplus <= 199711L
using namespace std::tr1;
#endif
using namespace std;
using namespace COLLADAFW;
using namespace COLLADABU;
using namespace COLLADASaxFWL;
namespace
{
const double radianPerDegree = Math::PI / 180.0;
}
namespace GLTF
{
/*
*/
COLLADA2GLTFWriter::COLLADA2GLTFWriter(shared_ptr<GLTFAsset> asset) :
_asset(asset),
_visualScene(0){
}
/*
*/
COLLADA2GLTFWriter::~COLLADA2GLTFWriter() {
}
/*
*/
void COLLADA2GLTFWriter::reportError(const std::string& method, const std::string& message) {
printf("ERROR: method:%s message:%s\n", method.c_str(), message.c_str());
}
/*
*/
bool COLLADA2GLTFWriter::write() {
this->_extraDataHandler = new ExtraDataHandler();
//To comply with macro to access config
GLTFAsset *asset = this->_asset.get();
asset->setExtras(this->_extraDataHandler->allExtras());
asset->prepareForProfile(shared_ptr <GLTFWebGL_1_0_Profile>(new GLTFWebGL_1_0_Profile()));
COLLADAFW::Root root(&this->_loader, this);
this->_loader.registerExtraDataCallbackHandler(this->_extraDataHandler);
const std::string& fileData = asset->getInputFileData();
if (fileData.empty())
{
// We don't have any data so read the file
if (!root.loadDocument(asset->getInputFilePath())) {
delete _extraDataHandler;
return false;
}
}
else
{
// We have the data in memory so use it
if (!root.loadDocument(asset->getInputFilePath(), fileData.data(), (int)fileData.size())) {
delete _extraDataHandler;
return false;
}
}
asset->write();
// Cleanup IDs and Technique cache in case we have another conversion
GLTFUtils::resetIDCount();
clearCommonProfileTechniqueCache();
delete _extraDataHandler;
return true;
}
//--------------------------------------------------------------------
void COLLADA2GLTFWriter::cancel(const std::string& errorMessage) {
printf("CONVERTION ABORTED: message:%s\n", errorMessage.c_str());
}
//--------------------------------------------------------------------
void COLLADA2GLTFWriter::start() {
}
//--------------------------------------------------------------------
void COLLADA2GLTFWriter::finish() {
}
//--------------------------------------------------------------------
bool COLLADA2GLTFWriter::writeGlobalAsset(const COLLADAFW::FileInfo* globalAsset) {
GLTFAsset* asset = this->_asset.get();
shared_ptr<JSONObject> assetObject = asset->root()->createObjectIfNeeded(kAsset);
std::string version = "collada2gltf@" + std::string(g_GIT_SHA1);
const COLLADAFW::FileInfo::ValuePairPointerArray& valuePairs = globalAsset->getValuePairArray();
for (size_t i = 0, count = valuePairs.getCount(); i < count; ++i)
{
const COLLADAFW::FileInfo::ValuePair* valuePair = valuePairs[i];
const COLLADAFW::String& key = valuePair->first;
const COLLADAFW::String& value = valuePair->second;
const char *sketchUp = "Google SketchUp";
if ((key == "authoring_tool") && value.length() > 0) {
if (value.find(sketchUp) != string::npos) {
//isolate x.y (version) that is the latest token from a string that is possibily x.y.z
size_t end = value.find_last_of(" ", value.length() - 1);
if (end != string::npos) {
std::string version = value.substr(end);
size_t major = version.find(".", 0);
if (major != string::npos) {
size_t minor = version.find(".", major + 1);
if (minor != string::npos) {
version = version.substr(0, minor);
double sketchUpVersion = atof(version.c_str());
if (sketchUpVersion < 7.1) {
asset->converterConfig()->config()->setBool("invertTransparency", true);
this->_asset->log("WARNING: Fixing transparency - by inverting it - as we convert an asset generated from SketchUp version:%s \n", version.c_str());
}
}
}
}
}
}
}
assetObject->setString("generator", version);
assetObject->setBool(kPremultipliedAlpha, CONFIG_BOOL(asset, kPremultipliedAlpha));
assetObject->setValue(kProfile, asset->profile()->id());
assetObject->setString(kVersion, glTFVersion);
_metersPerUnit = globalAsset->getUnit().getLinearUnitMeter();
if (globalAsset->getUpAxisType() == COLLADAFW::FileInfo::X_UP ||
globalAsset->getUpAxisType() == COLLADAFW::FileInfo::Z_UP)
{
COLLADABU::Math::Matrix4 matrix = COLLADABU::Math::Matrix4::IDENTITY;
if (globalAsset->getUpAxisType() == COLLADAFW::FileInfo::X_UP)
{
// Rotate -90 deg around Z
matrix.setElement(0, 0, 0.0f);
matrix.setElement(0, 1, -1.0f);
matrix.setElement(1, 0, 1.0f);
matrix.setElement(1, 1, 0.0f);
}
else // Z_UP
{
// Rotate 90 deg around X
matrix.setElement(1, 1, 0.0f);
matrix.setElement(1, 2, 1.0f);
matrix.setElement(2, 1, -1.0f);
matrix.setElement(2, 2, 0.0f);
}
_rootTransform = std::shared_ptr<GLTF::JSONObject>(new GLTF::JSONObject());
_rootTransform->setString(kName, "Y_UP_Transform");
_rootTransform->setValue("matrix", serializeOpenCOLLADAMatrix4(matrix));
shared_ptr <GLTF::JSONArray> childrenArray(new GLTF::JSONArray());
_rootTransform->setValue(kChildren, childrenArray);
}
asset->setDistanceScale(globalAsset->getUnit().getLinearUnitMeter());
return true;
}
//--------------------------------------------------------------------
float COLLADA2GLTFWriter::getTransparency(const COLLADAFW::EffectCommon* effectCommon) {
static bool loggedOnce = false;
GLTFAsset* asset = this->_asset.get();
//super naive for now, also need to check sketchup work-around
if (effectCommon->getOpacity().isTexture()) {
return 1;
}
COLLADAFW::EffectCommon::OpaqueMode opaqueMode;
float transparency = 1.0;
opaqueMode = effectCommon->getOpaqueMode();
ColorOrTexture transparent = effectCommon->getTransparent();
double transparentAlpha = (transparent.getType() == ColorOrTexture::COLOR) ? transparent.getColor().getAlpha() : 1.0;
switch (opaqueMode) {
case COLLADAFW::EffectCommon::OpaqueMode::RGB_ZERO:
case COLLADAFW::EffectCommon::OpaqueMode::A_ZERO:
transparency = static_cast<float>(1.0 - transparentAlpha * effectCommon->getTransparency().getFloatValue());
if (!loggedOnce) {
this->_asset->log("WARNING: unsupported opaque mode:%s fallback to A_ONE\n", opaqueModeToString(opaqueMode).c_str());
loggedOnce = true;
}
break;
case COLLADAFW::EffectCommon::OpaqueMode::RGB_ONE:
transparency = static_cast<float>(transparentAlpha * effectCommon->getTransparency().getFloatValue());
if (!loggedOnce) {
this->_asset->log("WARNING: unsupported opaque mode:%s fallback to A_ONE\n", opaqueModeToString(opaqueMode).c_str());
loggedOnce = true;
}
break;
case COLLADAFW::EffectCommon::OpaqueMode::A_ONE:
transparency = static_cast<float>(transparentAlpha * effectCommon->getTransparency().getFloatValue());
break;
case COLLADAFW::EffectCommon::OpaqueMode::UNSPECIFIED_OPAQUE:
default:
transparency = static_cast<float>(effectCommon->getOpacity().getColor().getAlpha());
break;
}
return CONFIG_BOOL(asset, "invertTransparency") ? 1 - transparency : transparency;
}
float COLLADA2GLTFWriter::isOpaque(const COLLADAFW::EffectCommon* effectCommon) {
return getTransparency(effectCommon) >= 1;
}
void COLLADA2GLTFWriter::registerObjectWithOriginalUID(std::string originalId, shared_ptr <JSONObject> obj, shared_ptr <JSONObject> objLib) {
if (this->_asset->_originalIDToTrackedObject.count(originalId) == 0) {
if (!objLib->contains(originalId)) {
objLib->setValue(originalId, obj);
this->_asset->_originalIDToTrackedObject[originalId] = obj;
}
else {
this->_asset->log("WARNING:Object with id:%s is already tracked, failed attempt to add object\n", originalId.c_str());
}
}
else {
this->_asset->log("WARNING:Object with id:%s is already tracked, failed attempt to add object\n", originalId.c_str());
}
}
void COLLADA2GLTFWriter::_storeMaterialBindingArray(const std::string& prefix,
const std::string& nodeUID,
const std::string& meshUID,
MaterialBindingArray &materialBindings) {
if (this->_asset->containsValueForUniqueId(meshUID) == false) {
return;
}
shared_ptr <GLTFMesh> mesh = static_pointer_cast<GLTFMesh>(this->_asset->getValueForUniqueId(meshUID));
this->_asset->setOriginalId(meshUID, mesh->getID());
MaterialBindingsForNodeUID& mb = this->_asset->materialBindingsForNodeUID();
shared_ptr <MaterialBindingsForMeshUID> materialBindingsMap;
if (mb.count(nodeUID) == 0) {
materialBindingsMap = shared_ptr<MaterialBindingsForMeshUID>(new MaterialBindingsForMeshUID());
mb[nodeUID] = materialBindingsMap;
}
else {
materialBindingsMap = mb[nodeUID];
}
//apply prefix on MeshUID
std::string prefixedMeshUID = prefix + meshUID;
shared_ptr <MaterialBindingsPrimitiveMap> materialBindingsPrimitiveMap;
if (materialBindingsMap->count(prefixedMeshUID) == 0) {
materialBindingsPrimitiveMap = shared_ptr<MaterialBindingsPrimitiveMap>(new MaterialBindingsPrimitiveMap());
(*materialBindingsMap)[prefixedMeshUID] = materialBindingsPrimitiveMap;
}
else {
materialBindingsPrimitiveMap = (*materialBindingsMap)[prefixedMeshUID];
}
GLTF::JSONValueVector primitives = mesh->getPrimitives()->values();
for (size_t j = 0; j < primitives.size(); j++) {
shared_ptr <GLTF::GLTFPrimitive> primitive = static_pointer_cast<GLTFPrimitive>(primitives[j]);
//FIXME: consider optimizing this with a hashtable, would be better if it was coming that way from OpenCOLLADA
int materialBindingIndex = -1;
for (size_t k = 0; k < materialBindings.getCount(); k++) {
if (materialBindings[k].getMaterialId() == primitive->getMaterialObjectID()) {
materialBindingIndex = (int)k;
}
}
if (materialBindingIndex != -1) {
shared_ptr <COLLADAFW::MaterialBinding> materialBinding(new COLLADAFW::MaterialBinding(materialBindings[materialBindingIndex]));
(*materialBindingsPrimitiveMap)[primitive->getMaterialObjectID()] = materialBinding;
}
}
return;
}
bool bufferEquals(float* first, float* second, int size, double epsilon) {
for (int i = 0; i < size; i++) {
if (fabs(first[i] - second[i]) > epsilon) {
return false;
}
}
return true;
}
COLLADABU::Math::Matrix4 getTransformationMatrix(const Transformation* transform) {
switch (transform->getTransformationType()) {
case Transformation::ROTATE: {
Rotate* rotate = (Rotate*)transform;
COLLADABU::Math::Vector3 axis = rotate->getRotationAxis();
axis.normalise();
double angle = rotate->getRotationAngle();
return COLLADABU::Math::Matrix4(COLLADABU::Math::Quaternion(COLLADABU::Math::Utils::degToRad(angle), axis));
}
case Transformation::TRANSLATE: {
Translate* translate = (Translate*)transform;
const COLLADABU::Math::Vector3& translation = translate->getTranslation();
COLLADABU::Math::Matrix4 translationMatrix;
translationMatrix.makeTrans(translation);
return translationMatrix;
}
case Transformation::SCALE: {
Scale* scale = (Scale*)transform;
const COLLADABU::Math::Vector3& scaleVector = scale->getScale();
COLLADABU::Math::Matrix4 scaleMatrix;
scaleMatrix.makeScale(scaleVector);
return scaleMatrix;
}
case Transformation::MATRIX: {
return ((Matrix*)transform)->getMatrix();
}
}
return COLLADABU::Math::Matrix4::IDENTITY;
}
COLLADABU::Math::Matrix4 getFlattenedTransform(vector<const Transformation*> transforms) {
COLLADABU::Math::Matrix4 matrix = COLLADABU::Math::Matrix4::IDENTITY;
for (const Transformation* transform : transforms) {
switch (transform->getTransformationType()) {
case Transformation::ROTATE: {
Rotate* rotate = (Rotate*)transform;
COLLADABU::Math::Vector3 axis = rotate->getRotationAxis();
axis.normalise();
double angle = rotate->getRotationAngle();
matrix = matrix * COLLADABU::Math::Matrix4(COLLADABU::Math::Quaternion(COLLADABU::Math::Utils::degToRad(angle), axis));
break;
}
case Transformation::TRANSLATE: {
Translate* translate = (Translate*)transform;
const COLLADABU::Math::Vector3& translation = translate->getTranslation();
COLLADABU::Math::Matrix4 translationMatrix;
translationMatrix.makeTrans(translation);
matrix = matrix * translationMatrix;
break;
}
case Transformation::SCALE: {
Scale* scale = (Scale*)transform;
const COLLADABU::Math::Vector3& scaleVector = scale->getScale();
COLLADABU::Math::Matrix4 scaleMatrix;
scaleMatrix.makeScale(scaleVector);
matrix = matrix * scaleMatrix;
break;
}
case Transformation::MATRIX: {
Matrix* transformMatrix = (Matrix*)transform;
matrix = matrix * transformMatrix->getMatrix();
break;
}
case Transformation::LOOKAT: {
Lookat* lookAt = (Lookat*)transform;
buildLookAtMatrix(lookAt, matrix);
break;
}
}
}
return matrix;
}
map<COLLADAFW::Transformation::TransformationType, float*> decomposeTransformationMatrix(COLLADABU::Math::Matrix4 matrix, vector<const Transformation*> transforms) {
map<COLLADAFW::Transformation::TransformationType, float*> decomposition;
float* scale = new float[3];
float* translation = new float[3];
float* rotation = new float[4];
GLTF::decomposeMatrix(matrix, translation, rotation, scale);
if (scale[0] == 0.0 && scale[1] == 0.0 && scale[2] == 0.0)
{
// Matrix decompose failed because of a uniform scaling of 0 in the transformations.
// We've lost the rotation information. We'll have to manually extract the rotations.
Math::Quaternion rotationQuat = Math::Quaternion::IDENTITY;
for (const Transformation* transform : transforms)
{
if (transform->getTransformationType() == Transformation::ROTATE)
{
Rotate* rotate = (Rotate*)transform;
Math::Vector3 axis = rotate->getRotationAxis();
axis.normalise();
double angle = rotate->getRotationAngle();
rotationQuat = rotationQuat * Math::Quaternion(Math::Utils::degToRad(angle), axis);
}
}
Math::Real angle;
Math::Vector3 axis;
rotationQuat.toAngleAxis(angle, axis);
rotation[0] = (float)axis.x;
rotation[1] = (float)axis.y;
rotation[2] = (float)axis.z;
rotation[3] = (float)angle;
}
decomposition[COLLADAFW::Transformation::TransformationType::SCALE] = scale;
decomposition[COLLADAFW::Transformation::TransformationType::TRANSLATE] = translation;
decomposition[COLLADAFW::Transformation::TransformationType::ROTATE] = rotation;
return decomposition;
}
bool COLLADA2GLTFWriter::writeNode(const COLLADAFW::Node* node, shared_ptr <GLTF::JSONObject> nodeObject, string nodeOriginalId) {
GLTFAsset *asset = this->_asset.get();
const NodePointerArray& nodes = node->getChildNodes();
std::string uniqueUID = node->getUniqueId().toAscii();
nodeObject->setString(kName, node->getName());
this->_asset->_uniqueIDToOpenCOLLADAObject[uniqueUID] = shared_ptr <COLLADAFW::Object>(node->clone());
this->_asset->setOriginalId(uniqueUID, nodeOriginalId);
this->_asset->setValueForUniqueId(uniqueUID, nodeObject);
if (node->getType() == COLLADAFW::Node::JOINT) {
const string& sid = node->getSid();
nodeObject->setString(kJointName, sid);
}
const InstanceCameraPointerArray& instanceCameras = node->getInstanceCameras();
size_t camerasCount = instanceCameras.getCount();
if (camerasCount > 0) {
InstanceCamera* instanceCamera = instanceCameras[0];
shared_ptr<GLTF::JSONObject> cameraObject(new GLTF::JSONObject());
std::string id = instanceCamera->getInstanciatedObjectId().toAscii();
std::string cameraId = this->_asset->getOriginalId(id);
nodeObject->setString(kCamera, cameraId);
}
const InstanceControllerPointerArray& instanceControllers = node->getInstanceControllers();
unsigned int count = (unsigned int)instanceControllers.getCount();
if (count > 0) {
shared_ptr<JSONObject> skins = this->_asset->root()->createObjectIfNeeded(kSkins);
for (unsigned int i = 0; i < count; i++) {
InstanceController* instanceController = instanceControllers[i];
MaterialBindingArray &materialBindings = instanceController->getMaterialBindings();
COLLADAFW::UniqueId uniqueId = instanceController->getInstanciatedObjectId();
if (asset->containsValueForUniqueId(uniqueId.toAscii())) {
shared_ptr<JSONString> skinControllerDataUID = static_pointer_cast<JSONString>(asset->getValueForUniqueId(uniqueId.toAscii()));
shared_ptr<GLTFSkin> skin = static_pointer_cast<GLTFSkin>(skins->getObject(skinControllerDataUID->getString()));
UniqueId meshUniqueId(skin->getSourceUID());
_storeMaterialBindingArray("skin-meshes-",
node->getUniqueId().toAscii(),
meshUniqueId.toAscii(),
materialBindings);
shared_ptr<JSONArray> skeletons(new JSONArray());
for (size_t k = 0; k < instanceController->skeletons().size(); k++) {
std::string skeleton = instanceController->skeletons()[k].getFragment();
skeletons->appendValue(shared_ptr<JSONString>(new JSONString(skeleton)));
}
nodeObject->setValue("skeletons", skeletons);
nodeObject->setString(kSkin, skin->getId());
}
}
}
// save mesh
const InstanceGeometryPointerArray& instanceGeometries = node->getInstanceGeometries();
count = (unsigned int)instanceGeometries.getCount();
if (count > 0) {
for (unsigned int i = 0; i < count; i++) {
InstanceGeometry* instanceGeometry = instanceGeometries[i];
COLLADAFW::UniqueId uniqueId = instanceGeometry->getInstanciatedObjectId();
std::string meshUID = uniqueId.toAscii();
MaterialBindingArray& materialBindings = instanceGeometry->getMaterialBindings();
if (materialBindings.getCount() > 0) {
MaterialBinding materialBinding = materialBindings[0];
COLLADAFW::UniqueId materialId = materialBinding.getReferencedMaterial();
// Check if this geometry has already been bound to another node with a different material
bool alreadyBound = false;
MaterialBindingsForNodeUID nodeBindings = this->_asset->materialBindingsForNodeUID();
for (auto nodeBinding : nodeBindings) {
shared_ptr<MaterialBindingsForMeshUID> meshBindings = nodeBinding.second;
for (auto meshBinding : *(meshBindings.get())) {
std::string meshId = meshBinding.first;
if ("meshes-" + uniqueId.toAscii() == meshId) {
shared_ptr<MaterialBindingsPrimitiveMap> materialBindings = meshBinding.second;
bool materialUsed = false;
for (auto materialBinding : *(materialBindings.get())) {
shared_ptr<MaterialBinding> primitiveBindings = materialBinding.second;
if (primitiveBindings->getReferencedMaterial() == materialId) {
materialUsed = true;
break;
}
}
if (!materialUsed) {
alreadyBound = true;
break;
}
}
}
if (alreadyBound) {
break;
}
}
if (alreadyBound) {
// This is an instance of a material
shared_ptr<GLTFMesh> mesh = static_pointer_cast<GLTFMesh>(this->_asset->getValueForUniqueId(uniqueId.toAscii()));
// Create a unique instance of the mesh so that it can bind to different materials
while (asset->containsValueForUniqueId(meshUID)) {
uniqueId = COLLADAFW::UniqueId(uniqueId.getClassId(), uniqueId.getObjectId() + 1, uniqueId.getFileId());
meshUID = mesh->getID() + "-" + std::to_string(uniqueId.getObjectId() + 1);
}
shared_ptr<GLTFMesh> meshInstance = mesh->clone();
meshInstance->setID(meshUID);
meshInstance->setName(meshUID);
asset->root()->createObjectIfNeeded(kMeshes)->setValue(meshUID, meshInstance);
asset->setValueForUniqueId(meshUID, meshInstance);
}
}
if (meshUID != "") {
_storeMaterialBindingArray("meshes-",
node->getUniqueId().toAscii(),
meshUID,
materialBindings);
}
}
}
shared_ptr <GLTF::JSONArray> childrenArray(new GLTF::JSONArray());
nodeObject->setValue(kChildren, childrenArray);
count = (unsigned int)nodes.getCount();
for (unsigned int i = 0; i < count; i++) {
std::string childOriginalID = nodes[i]->getOriginalId();
if (childOriginalID.length() == 0) {
childOriginalID = uniqueIdWithType(kNode, nodes[i]->getUniqueId());
}
childrenArray->appendValue(shared_ptr <GLTF::JSONString>(new GLTF::JSONString(childOriginalID)));
}
const InstanceNodePointerArray& instanceNodes = node->getInstanceNodes();
count = (unsigned int)instanceNodes.getCount();
for (unsigned int i = 0; i < count; i++) {
InstanceNode* instanceNode = instanceNodes[i];
std::string id = instanceNode->getInstanciatedObjectId().toAscii();
shared_ptr<JSONArray> parents;
if (this->_asset->_uniqueIDToParentsOfInstanceNode.count(id) == 0) {
parents = shared_ptr<JSONArray>(new JSONArray());
this->_asset->_uniqueIDToParentsOfInstanceNode[id] = parents;
}
else {
parents = this->_asset->_uniqueIDToParentsOfInstanceNode[id];
}
parents->appendValue(shared_ptr<JSONString>(new JSONString(node->getUniqueId().toAscii())));
if (this->_asset->containsValueForUniqueId(id)) {
std::string instanceNodeOriginalId = this->_asset->getOriginalId(id);
childrenArray->appendValue(shared_ptr <GLTF::JSONString>(new GLTF::JSONString(instanceNodeOriginalId)));
}
}
shared_ptr <GLTF::JSONArray> lightsInNode(new GLTF::JSONArray());
const InstanceLightPointerArray& instanceLights = node->getInstanceLights();
count = (unsigned int)instanceLights.getCount();
//For a given light, keep track of all the nodes holding it
if (count) {
shared_ptr<JSONObject> extension = this->_asset->root()->createObjectIfNeeded(kExtensions);
shared_ptr<JSONObject> khrMaterialsCommon = extension->createObjectIfNeeded("KHR_materials_common");
shared_ptr<JSONObject> lights = khrMaterialsCommon->createObjectIfNeeded(kLights);
for (unsigned int i = 0; i < count; i++) {
InstanceLight* instanceLight = instanceLights[i];
std::string id = instanceLight->getInstanciatedObjectId().toAscii();
shared_ptr<JSONObject> light = static_pointer_cast<JSONObject>(this->_asset->getValueForUniqueId(id));
if (light) {
std::string lightUID = this->_asset->getOriginalId(id);
shared_ptr<JSONArray> listOfNodesPerLight;
if (this->_asset->_uniqueIDOfLightToNodes.count(id) == 0) {
listOfNodesPerLight = shared_ptr<JSONArray>(new JSONArray());
this->_asset->_uniqueIDOfLightToNodes[lightUID] = listOfNodesPerLight;
}
else {
listOfNodesPerLight = this->_asset->_uniqueIDOfLightToNodes[lightUID];
}
listOfNodesPerLight->appendValue(JSONSTRING(nodeOriginalId));
lightsInNode->appendValue(shared_ptr <JSONString>(new JSONString(lightUID)));
lights->setValue(lightUID, light);
}
}
//We just want a single light per node
//https://github.com/KhronosGroup/glTF/issues/13
//lightKhrMaterialsCommon->setValue("lights", lightsInNode);
if (lightsInNode->values().size() > 0 && CONFIG_BOOL(asset, "useKhrMaterialsCommon")) {
shared_ptr<JSONObject> lightExtension = nodeObject->createObjectIfNeeded(kExtensions);
shared_ptr<JSONObject> lightKhrMaterialsCommon = lightExtension->createObjectIfNeeded("KHR_materials_common");
lightKhrMaterialsCommon->setValue(kLight, lightsInNode->values()[0]);
if (count > 1) {
//FR: AFAIK no authoring tool export multiple light per node, but we'll warn if that's the case
//To fix this, dummy sub nodes should be created.
static bool printedOnce = false;
if (printedOnce) {
this->_asset->log("WARNING: some unhandled lights because some nodes carry more than a single light\n");
printedOnce = false;
}
}
}
}
return true;
}
// Flattening [UNFINISHED CODE]
//conditions for flattening
// -> same material
// option to merge of not non-opaque geometry
// -> check per primitive that sources / semantic layout matches
// [meshAttributes]
// -> for all meshes
// -> collect all kind of semantic
// -> for all meshes
// -> get all meshAttributes
// -> transforms & write vtx attributes
bool COLLADA2GLTFWriter::processSceneFlatteningInfo(SceneFlatteningInfo* sceneFlatteningInfo) {
/*
MeshFlatteningInfoVector allMeshes = sceneFlatteningInfo->allMeshes;
//First collect all kind of meshAttributes available
size_t count = allMeshes.size();
for (size_t i = 0 ; i < count ; i++) {
shared_ptr <MeshFlatteningInfo> meshInfo = allMeshes[i];
MeshVectorSharedPtr *meshes = this->_uniqueIDToMeshes[meshInfo->getUID()];
// shared_ptr <MeshAttributeVector> meshAttributes = mesh->meshAttributes();
}
*/
return true;
}
bool COLLADA2GLTFWriter::writeVisualScene(const COLLADAFW::VisualScene* visualScene) {
//FIXME: only one visual scene assumed/handled
shared_ptr <GLTF::JSONObject> scenesObject(new GLTF::JSONObject());
shared_ptr <GLTF::JSONObject> sceneObject(new GLTF::JSONObject());
shared_ptr <GLTF::JSONObject> nodesObject = this->_asset->root()->createObjectIfNeeded(kNodes);
const NodePointerArray& nodePointerArray = visualScene->getRootNodes();
size_t nodeCount = nodePointerArray.getCount();
this->_asset->root()->setValue(kScenes, scenesObject);
this->_asset->root()->setString(kScene, "defaultScene");
scenesObject->setValue("defaultScene", sceneObject); //FIXME: should use this id -> visualScene->getOriginalId()
//first pass to output children name of our root node
shared_ptr <GLTF::JSONArray> childrenArray;
if (_rootTransform) {
// Add the root transform to the nodes
std::string yUpNodeID = uniqueIdWithType(kNode, this->_loader.getUniqueId(COLLADAFW::COLLADA_TYPE::NODE));
nodesObject->setValue(yUpNodeID, _rootTransform);
// Create a children array for the scene and add the root transform to it
shared_ptr <GLTF::JSONArray> sceneChildrenArray(new GLTF::JSONArray());
sceneObject->setValue(kNodes, sceneChildrenArray);
shared_ptr <GLTF::JSONString> rootIDValue(new GLTF::JSONString(yUpNodeID));
sceneChildrenArray->appendValue(static_pointer_cast <GLTF::JSONValue> (rootIDValue));
// Set childrenArray to the root transform's children array so all root nodes will become its children
childrenArray = std::static_pointer_cast<GLTF::JSONArray>(_rootTransform->getValue(kChildren));
}
else {
// No root transform so just add all root nodes to the scene's children array
childrenArray = std::shared_ptr<GLTF::JSONArray>(new GLTF::JSONArray());
sceneObject->setValue(kNodes, childrenArray);
}
for (size_t i = 0; i < nodeCount; i++) {
COLLADAFW::Node* childNode = nodePointerArray[i];
std::string nodeUID = childNode->getOriginalId();
if (nodeUID.length() == 0) {
nodeUID = uniqueIdWithType(kNode, nodePointerArray[i]->getUniqueId());
childNode->setOriginalId(nodeUID);
}
shared_ptr <GLTF::JSONString> nodeIDValue(new GLTF::JSONString(nodeUID));
childrenArray->appendValue(static_pointer_cast <GLTF::JSONValue> (nodeIDValue));
}
vector<const COLLADAFW::Node*> nodes;
for (size_t i = 0; i < nodeCount; i++) {
nodes.push_back(nodePointerArray[i]);
}
return writeNodes(nodes);
}
//--------------------------------------------------------------------
bool COLLADA2GLTFWriter::writeScene(const COLLADAFW::Scene* scene) {
return true;
}
//--------------------------------------------------------------------
bool COLLADA2GLTFWriter::writeLibraryNodes(const COLLADAFW::LibraryNodes* libraryNodes) {
vector<const COLLADAFW::Node*> nodes;
const NodePointerArray& nodeArray = libraryNodes->getNodes();
for (size_t i = 0; i < nodeArray.getCount(); i++) {
const COLLADAFW::Node* node = nodeArray[i];
std::string id = node->getUniqueId().toAscii();
if (this->_asset->_uniqueIDToParentsOfInstanceNode.count(id) > 0) {
shared_ptr<JSONArray> parents = this->_asset->_uniqueIDToParentsOfInstanceNode[id];
std::vector <shared_ptr <JSONValue> > values = parents->values();
for (size_t k = 0; k < values.size(); k++) {
shared_ptr<JSONString> value = static_pointer_cast<JSONString>(values[k]);
shared_ptr<JSONObject> parentNode = static_pointer_cast<JSONObject>(this->_asset->getValueForUniqueId(value->getString()));
if (parentNode) {
shared_ptr <JSONArray> children = parentNode->createArrayIfNeeded(kChildren);
children->appendValue(shared_ptr <JSONString>(new JSONString(node->getOriginalId())));
}
}
}
nodes.push_back(node);
}
return writeNodes(nodes);
}
void writeTransform(shared_ptr<GLTF::GLTFAsset> asset, shared_ptr<GLTF::JSONObject> nodeObject, COLLADABU::Math::Matrix4 matrix, vector<const Transformation*> transformations, bool useTRS) {
if (useTRS) {
map<COLLADAFW::Transformation::TransformationType, float*> decomposition = decomposeTransformationMatrix(matrix, transformations);
float* translation = decomposition[COLLADAFW::Transformation::TransformationType::TRANSLATE];
float* rotation = decomposition[COLLADAFW::Transformation::TransformationType::ROTATE];
float* scale = decomposition[COLLADAFW::Transformation::TransformationType::SCALE];
// Scale distance units if we need to
translation[0] *= (float)asset->getDistanceScale();
translation[1] *= (float)asset->getDistanceScale();
translation[2] *= (float)asset->getDistanceScale();
bool exportDefaultValues = CONFIG_BOOL(asset, "exportDefaultValues");
bool exportTranslation = !(!exportDefaultValues &&
((translation[0] == 0) && (translation[1] == 0) && (translation[2] == 0)));
if (exportTranslation)
nodeObject->setValue("translation", serializeVec3(translation[0], translation[1], translation[2]));
// Rotation is a quaternion [V, s]
nodeObject->setValue("rotation", serializeVec4(rotation[0], rotation[1], rotation[2], rotation[3]));
bool exportScale = !(!exportDefaultValues && ((scale[0] == 1) && (scale[1] == 1) && (scale[2] == 1)));
if (exportScale)
nodeObject->setValue("scale", serializeVec3(scale[0], scale[1], scale[2]));
}
else {
matrix.scaleTrans(asset->getDistanceScale());
bool exportMatrix = !((matrix == COLLADABU::Math::Matrix4::IDENTITY && (CONFIG_BOOL(asset, "exportDefaultValues") == false)));
if (exportMatrix) {
nodeObject->setValue("matrix", serializeOpenCOLLADAMatrix4(matrix));
}
}
}
bool COLLADA2GLTFWriter::writeNodes(vector<const COLLADAFW::Node*> nodes) {
shared_ptr<GLTF::JSONObject> nodesObject = this->_asset->root()->createObjectIfNeeded(kNodes);
vector<const Transformation*> nodeTransforms;
COLLADABU::Math::Matrix4 matrix;
for (const COLLADAFW::Node* node : nodes) {
std::string baseId = node->getOriginalId();
std::string id = baseId;
shared_ptr <GLTF::JSONObject> nodeObject(new GLTF::JSONObject());
TransformationPointerArray transformations = node->getTransformations();
bool needsRoot = true;
for (size_t i = 0; i < transformations.getCount(); i++) {
const Transformation* transformation = transformations[i];
UniqueId animationListId = transformation->getAnimationList();
if (animationListId.isValid()) {
this->_asset->_transformationForAnimationListId[animationListId] = transformation->clone();
// Split off any pre-existing transforms
if (nodeTransforms.size() > 0) {
matrix = getFlattenedTransform(nodeTransforms);
if (matrix != COLLADABU::Math::Matrix4::IDENTITY) {
shared_ptr<JSONArray> children = nodeObject->createArrayIfNeeded(kChildren);
nodeObject = shared_ptr<GLTF::JSONObject>(new GLTF::JSONObject());
if (!needsRoot) {
id = "_" + baseId + "_split_" + to_string((int)animationListId.getObjectId());
}
children->appendValue(shared_ptr<JSONString>(new JSONString(id)));
writeTransform(this->_asset, nodeObject, matrix, nodeTransforms, false);
nodesObject->setValue(id, nodeObject);
needsRoot = false;
}
}
// Make a new node to target for the animation
shared_ptr<JSONArray> children = nodeObject->createArrayIfNeeded(kChildren);
nodeObject = shared_ptr<GLTF::JSONObject>(new GLTF::JSONObject());
if (!needsRoot) {
id = "_" + baseId + "_target_" + to_string((int)animationListId.getObjectId());
}
else {
needsRoot = false;
}
this->_asset->_animationListIdForNodeId[id] = animationListId;
this->_asset->_nodeIdForAnimationListId[animationListId] = id;
children->appendValue(shared_ptr<JSONString>(new JSONString(id)));
matrix = getTransformationMatrix(transformation);
writeTransform(this->_asset, nodeObject, matrix, nodeTransforms, true);
nodesObject->setValue(id, nodeObject);
nodeTransforms.clear();
}
else {
// Flatten this transform into the node.
nodeTransforms.push_back(transformation->clone());
}
}
// Write out any remaining transforms
matrix = COLLADABU::Math::Matrix4::IDENTITY;
if (nodeTransforms.size() > 0) {
matrix = getFlattenedTransform(nodeTransforms);
if (matrix != COLLADABU::Math::Matrix4::IDENTITY) {
if (!needsRoot) {
shared_ptr<JSONArray> children = nodeObject->createArrayIfNeeded(kChildren);
nodeObject = shared_ptr<GLTF::JSONObject>(new GLTF::JSONObject());
id = "_" + baseId + "_split";
children->appendValue(shared_ptr<JSONString>(new JSONString(id)));
}
writeTransform(this->_asset, nodeObject, matrix, nodeTransforms, false);
}
nodeTransforms.clear();
}
nodesObject->setValue(id, nodeObject);
writeNode(node, nodeObject, id);
vector<const COLLADAFW::Node*> children;
NodePointerArray childNodes = node->getChildNodes();
if (childNodes.getCount() > 0) {
for (size_t i = 0; i < childNodes.getCount(); i++) {
COLLADAFW::Node* childNode = childNodes[i];
std::string nodeUID = childNode->getOriginalId();
if (nodeUID.length() == 0) {
nodeUID = uniqueIdWithType(kNode, childNode->getUniqueId());
childNode->setOriginalId(nodeUID);
}
children.push_back(childNode);
}
writeNodes(children);
}
}
return true;
}
//--------------------------------------------------------------------
bool COLLADA2GLTFWriter::writeGeometry(const COLLADAFW::Geometry* geometry) {
switch (geometry->getType()) {
case Geometry::GEO_TYPE_MESH:
{
const COLLADAFW::Mesh* mesh = (COLLADAFW::Mesh*)geometry;
std::string meshUID = geometry->getUniqueId().toAscii();
if (this->_asset->containsValueForUniqueId(meshUID) == false) {
shared_ptr<GLTFMesh> cvtMesh = convertOpenCOLLADAMesh((COLLADAFW::Mesh*)mesh, this->_asset.get());
if (cvtMesh != nullptr) {
this->_asset->root()->createObjectIfNeeded(kMeshes)->setValue(cvtMesh->getID(), cvtMesh);
this->_asset->setValueForUniqueId(meshUID, cvtMesh);
}
}
}
break;
case Geometry::GEO_TYPE_SPLINE:
case Geometry::GEO_TYPE_CONVEX_MESH:
// FIXME: handle convertion to mesh
case Geometry::GEO_TYPE_UNKNOWN:
//FIXME: handle error
default:
return false;
}
return true;
}
//--------------------------------------------------------------------
bool COLLADA2GLTFWriter::writeMaterial(const COLLADAFW::Material* material) {
const UniqueId& effectUID = material->getInstantiatedEffect();
std::string materialID = material->getUniqueId().toAscii();
this->_asset->_materialUIDToName[materialID] = material->getName();
this->_asset->_materialUIDToEffectUID[materialID] = effectUID;
return true;
}
//--------------------------------------------------------------------
unsigned int __GetGLWrapMode(COLLADAFW::Sampler::WrapMode wrapMode, GLTFProfile *profile) {
switch (wrapMode) {
case COLLADAFW::Sampler::WRAP_MODE_UNSPECIFIED:
case COLLADAFW::Sampler::WRAP_MODE_NONE:
case COLLADAFW::Sampler::WRAP_MODE_WRAP:
return profile->getGLenumForString("REPEAT");
case COLLADAFW::Sampler::WRAP_MODE_MIRROR:
return profile->getGLenumForString("MIRRORED_REPEAT");
case COLLADAFW::Sampler::WRAP_MODE_CLAMP:
return profile->getGLenumForString("CLAMP_TO_EDGE");
default:
break;
}
return profile->getGLenumForString("REPEAT");
}
static unsigned int __GetFilterMode(COLLADAFW::Sampler::SamplerFilter wrapMode, GLTFProfile *profile) {
switch (wrapMode) {
case COLLADAFW::Sampler::SAMPLER_FILTER_UNSPECIFIED:
case COLLADAFW::Sampler::SAMPLER_FILTER_NONE:
case COLLADAFW::Sampler::SAMPLER_FILTER_LINEAR:
return profile->getGLenumForString("LINEAR");
case COLLADAFW::Sampler::SAMPLER_FILTER_NEAREST:
return profile->getGLenumForString("NEAREST");
case COLLADAFW::Sampler::SAMPLER_FILTER_NEAREST_MIPMAP_NEAREST:
return profile->getGLenumForString("NEAREST_MIPMAP_NEAREST");
case COLLADAFW::Sampler::SAMPLER_FILTER_LINEAR_MIPMAP_NEAREST:
return profile->getGLenumForString("LINEAR_MIPMAP_NEAREST");
case COLLADAFW::Sampler::SAMPLER_FILTER_NEAREST_MIPMAP_LINEAR:
return profile->getGLenumForString("NEAREST_MIPMAP_LINEAR");
case COLLADAFW::Sampler::SAMPLER_FILTER_LINEAR_MIPMAP_LINEAR:
return profile->getGLenumForString("LINEAR_MIPMAP_LINEAR");
default:
break;
}
return profile->getGLenumForString("LINEAR");
}
std::string COLLADA2GLTFWriter::getSamplerUIDForParameters(unsigned int wrapS,
unsigned int wrapT,
unsigned int minFilter,
unsigned int maxFilter) {
std::string samplerHash = GLTFUtils::toString(wrapS) + GLTFUtils::toString(wrapT) + GLTFUtils::toString(minFilter) + GLTFUtils::toString(maxFilter);
bool addSampler = false;
size_t index = 0;
if (this->_asset->_samplerHashtoSamplerIndex.count(samplerHash) == 0) {
index = this->_asset->_samplerHashtoSamplerIndex.size();
this->_asset->_samplerHashtoSamplerIndex[samplerHash] = (unsigned int)index;
addSampler = true;
}
else {
index = this->_asset->_samplerHashtoSamplerIndex[samplerHash];
}
std::string samplerUID = "sampler_" + GLTFUtils::toString(index);
if (addSampler) {
shared_ptr <JSONObject> sampler2D(new JSONObject());
sampler2D->setUnsignedInt32("wrapS", wrapS);
sampler2D->setUnsignedInt32("wrapT", wrapT);
sampler2D->setUnsignedInt32("minFilter", minFilter);
sampler2D->setUnsignedInt32("magFilter", maxFilter);
shared_ptr <GLTF::JSONObject> samplers = this->_asset->root()->createObjectIfNeeded("samplers");
samplers->setValue(samplerUID, sampler2D);
}
return samplerUID;
}
void COLLADA2GLTFWriter::_installTextureSlot(Sampler* sampler,