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Viewer.cpp
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Viewer.cpp
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#include <MaterialXView/Viewer.h>
#include <MaterialXGenShader/DefaultColorManagementSystem.h>
#include <MaterialXGenShader/Shader.h>
#include <MaterialXRender/OiioImageLoader.h>
#include <MaterialXRender/StbImageLoader.h>
#include <MaterialXRender/TinyObjLoader.h>
#include <MaterialXRender/Util.h>
#include <nanogui/button.h>
#include <nanogui/combobox.h>
#include <nanogui/label.h>
#include <nanogui/layout.h>
#include <nanogui/messagedialog.h>
#include <fstream>
#include <iostream>
const float PI = std::acos(-1.0f);
const int MIN_ENV_SAMPLES = 4;
const int MAX_ENV_SAMPLES = 1024;
const int DEFAULT_ENV_SAMPLES = 16;
namespace {
mx::Matrix44 createViewMatrix(const mx::Vector3& eye,
const mx::Vector3& target,
const mx::Vector3& up)
{
mx::Vector3 z = (target - eye).getNormalized();
mx::Vector3 x = z.cross(up).getNormalized();
mx::Vector3 y = x.cross(z);
return mx::Matrix44(
x[0], x[1], x[2], -x.dot(eye),
y[0], y[1], y[2], -y.dot(eye),
-z[0], -z[1], -z[2], z.dot(eye),
0.0f, 0.0f, 0.0f, 1.0f);
}
mx::Matrix44 createPerspectiveMatrix(float left, float right,
float bottom, float top,
float nearP, float farP)
{
return mx::Matrix44(
(2.0f * nearP) / (right - left), 0.0f, (right + left) / (right - left), 0.0f,
0.0f, (2.0f * nearP) / (top - bottom), (top + bottom) / (top - bottom), 0.0f,
0.0f, 0.0f, -(farP + nearP) / (farP - nearP), -(2.0f * farP * nearP) / (farP - nearP),
0.0f, 0.0f, -1.0f, 0.0f);
}
bool stringEndsWith(const std::string& str, std::string const& end)
{
if (str.length() >= end.length())
{
return !str.compare(str.length() - end.length(), end.length(), end);
}
else
{
return false;
}
}
void writeTextFile(const std::string& text, const std::string& filePath)
{
std::ofstream file;
file.open(filePath);
file << text;
file.close();
}
mx::DocumentPtr loadLibraries(const mx::StringVec& libraryFolders, const mx::FileSearchPath& searchPath)
{
mx::DocumentPtr doc = mx::createDocument();
for (const std::string& libraryFolder : libraryFolders)
{
mx::FilePath path = searchPath.find(libraryFolder);
mx::FilePathVec filenames = path.getFilesInDirectory("mtlx");
for (const std::string& filename : filenames)
{
mx::FilePath file = path / filename;
mx::DocumentPtr libDoc = mx::createDocument();
mx::readFromXmlFile(libDoc, file);
libDoc->setSourceUri(file);
mx::CopyOptions copyOptions;
copyOptions.skipDuplicateElements = true;
doc->importLibrary(libDoc, ©Options);
}
}
return doc;
}
void applyModifiers(mx::DocumentPtr doc, const DocumentModifiers& modifiers)
{
for (mx::ElementPtr elem : doc->traverseTree())
{
if (modifiers.remapElements.count(elem->getCategory()))
{
elem->setCategory(modifiers.remapElements.at(elem->getCategory()));
}
if (modifiers.remapElements.count(elem->getName()))
{
elem->setName(modifiers.remapElements.at(elem->getName()));
}
mx::StringVec attrNames = elem->getAttributeNames();
for (const std::string& attrName : attrNames)
{
if (modifiers.remapElements.count(elem->getAttribute(attrName)))
{
elem->setAttribute(attrName, modifiers.remapElements.at(elem->getAttribute(attrName)));
}
}
if (elem->hasFilePrefix() && !modifiers.filePrefixTerminator.empty())
{
std::string filePrefix = elem->getFilePrefix();
if (!stringEndsWith(filePrefix, modifiers.filePrefixTerminator))
{
elem->setFilePrefix(filePrefix + modifiers.filePrefixTerminator);
}
}
std::vector<mx::ElementPtr> children = elem->getChildren();
for (mx::ElementPtr child : children)
{
if (modifiers.skipElements.count(child->getCategory()) ||
modifiers.skipElements.count(child->getName()))
{
elem->removeChild(child->getName());
}
}
}
// Remap references to unimplemented shader nodedefs.
for (mx::MaterialPtr material : doc->getMaterials())
{
for (mx::ShaderRefPtr shaderRef : material->getShaderRefs())
{
mx::NodeDefPtr nodeDef = shaderRef->getNodeDef();
if (nodeDef && !nodeDef->getImplementation())
{
std::vector<mx::NodeDefPtr> altNodeDefs = doc->getMatchingNodeDefs(nodeDef->getNodeString());
for (mx::NodeDefPtr altNodeDef : altNodeDefs)
{
if (altNodeDef->getImplementation())
{
shaderRef->setNodeDefString(altNodeDef->getName());
}
}
}
}
}
}
} // anonymous namespace
//
// Viewer methods
//
Viewer::Viewer(const mx::StringVec& libraryFolders,
const mx::FileSearchPath& searchPath,
const std::string& meshFilename,
const std::string& materialFilename,
const DocumentModifiers& modifiers,
mx::HwSpecularEnvironmentMethod specularEnvironmentMethod,
const std::string& envRadiancePath,
const std::string& envIrradiancePath,
int multiSampleCount) :
ng::Screen(ng::Vector2i(1280, 960), "MaterialXView",
true, false,
8, 8, 24, 8,
multiSampleCount),
_eye(0.0f, 0.0f, 5.0f),
_up(0.0f, 1.0f, 0.0f),
_zoom(1.0f),
_viewAngle(45.0f),
_nearDist(0.05f),
_farDist(5000.0f),
_modelZoom(1.0f),
_translationActive(false),
_translationStart(0, 0),
_libraryFolders(libraryFolders),
_searchPath(searchPath),
_materialFilename(materialFilename),
_modifiers(modifiers),
_envRadiancePath(envRadiancePath),
_envIrradiancePath(envIrradiancePath),
_directLighting(false),
_indirectLighting(true),
_ambientOcclusion(false),
_meshFilename(meshFilename),
_selectedGeom(0),
_selectedMaterial(0),
_genContext(mx::GlslShaderGenerator::create()),
_splitByUdims(false),
_mergeMaterials(false),
_outlineSelection(false),
_specularEnvironmentMethod(specularEnvironmentMethod),
_envSamples(DEFAULT_ENV_SAMPLES),
_drawEnvironment(false),
_captureFrame(false),
_drawUVGeometry(false),
_uvScale(2.0f, 2.0f, 1.0f),
_uvTranslation(-0.5f, 0.5f, 0.0f),
_uvZoom(1.0f)
{
// Transpary option before creating Advanced UI
// as this flag is used to set the default value.
_genContext.getOptions().hwTransparency = true;
_window = new ng::Window(this, "Viewer Options");
_window->setPosition(ng::Vector2i(15, 15));
_window->setLayout(new ng::GroupLayout());
createLoadMeshInterface(_window, "Load Mesh");
createLoadMaterialsInterface(_window, "Load Material");
ng::Button* editorButton = new ng::Button(_window, "Property Editor");
editorButton->setFlags(ng::Button::ToggleButton);
editorButton->setChangeCallback([this](bool state)
{
_propertyEditor.setVisible(state);
performLayout();
});
createAdvancedSettings(_window);
_geomLabel = new ng::Label(_window, "Select Geometry");
_geometryListBox = new ng::ComboBox(_window, { "None" });
_geometryListBox->setChevronIcon(-1);
_geometryListBox->setCallback([this](int choice)
{
size_t index = (size_t) choice;
if (index < _geometryList.size())
{
_selectedGeom = index;
if (_materialAssignments.count(getSelectedGeometry()))
{
setSelectedMaterial(_materialAssignments[getSelectedGeometry()]);
}
updatePropertyEditor();
updateMaterialSelectionUI();
}
});
_materialLabel = new ng::Label(_window, "Assigned Material");
_materialSelectionBox = new ng::ComboBox(_window, { "None" });
_materialSelectionBox->setChevronIcon(-1);
_materialSelectionBox->setCallback([this](int choice)
{
size_t index = (size_t) choice;
if (index < _materials.size())
{
// Update selected material index
_selectedMaterial = index;
// Assign selected material to geometry
assignMaterial(getSelectedGeometry(), _materials[index]);
}
});
// Set default generator options.
_genContext.getOptions().hwSpecularEnvironmentMethod = _specularEnvironmentMethod;
_genContext.getOptions().targetColorSpaceOverride = "lin_rec709";
_genContext.getOptions().fileTextureVerticalFlip = true;
// Set default light information before initialization
_lightFileName = "resources/Materials/TestSuite/Utilities/Lights/default_viewer_lights.mtlx";
// Initialize standard library and color management.
_stdLib = loadLibraries(_libraryFolders, _searchPath);
mx::DefaultColorManagementSystemPtr cms = mx::DefaultColorManagementSystem::create(_genContext.getShaderGenerator().getLanguage());
cms->loadLibrary(_stdLib);
for (size_t i = 0; i < _searchPath.size(); i++)
{
_genContext.registerSourceCodeSearchPath(_searchPath[i]);
}
_genContext.getShaderGenerator().setColorManagementSystem(cms);
// Generate wireframe material.
const std::string constantShaderName("__WIRE_SHADER_NAME__");
const mx::Color3 color(1.0f);
_wireMaterial = Material::create();
try
{
_wireMaterial->generateConstantShader(_genContext, _stdLib, constantShaderName, color);
}
catch (std::exception& e)
{
_wireMaterial = nullptr;
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Failed to generate wire shader", e.what());
}
// Construct the appropriate image handler for this build.
#if MATERIALX_BUILD_OIIO
mx::ImageLoaderPtr imageLoader = mx::OiioImageLoader::create();
#else
mx::ImageLoaderPtr imageLoader = mx::StbImageLoader::create();
#endif
_imageHandler = mx::GLTextureHandler::create(imageLoader);
mx::TinyObjLoaderPtr loader = mx::TinyObjLoader::create();
_geometryHandler = mx::GeometryHandler::create();
_geometryHandler->addLoader(loader);
_geometryHandler->loadGeometry(_searchPath.find(_meshFilename));
updateGeometrySelections();
_envGeometryHandler = mx::GeometryHandler::create();
_envGeometryHandler->addLoader(loader);
mx::FilePath envSphere("resources/Geometry/sphere.obj");
_envGeometryHandler->loadGeometry(_searchPath.find(envSphere));
const mx::MeshList& meshes = _envGeometryHandler->getMeshes();
if (!meshes.empty())
{
// Set up world matrix for drawing
const float scaleFactor = 300.0f;
const float rotationRadians = PI / 2.0f; // 90 degree rotation
_envMatrix = mx::Matrix44::createScale(mx::Vector3(scaleFactor)) * mx::Matrix44::createRotationY(rotationRadians);
// Create environment shader.
mx::FilePath envFilename = _searchPath.find(
mx::FilePath("resources/Materials/TestSuite/Utilities/Lights/envmap_shader.mtlx"));
_envMaterial = Material::create();
try
{
_envMaterial->generateEnvironmentShader(_genContext, envFilename, _stdLib, _envRadiancePath);
_envMaterial->bindMesh(_envGeometryHandler->getMeshes()[0]);
}
catch (std::exception& e)
{
_envMaterial = nullptr;
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Failed to generate environment shader", e.what());
}
}
// Initialize camera
initCamera();
setResizeCallback([this](ng::Vector2i size)
{
_arcball.setSize(size);
});
loadDocument(_materialFilename, _stdLib);
_propertyEditor.setVisible(false);
performLayout();
}
void Viewer::setupLights(mx::DocumentPtr doc)
{
mx::CopyOptions copyOptions;
copyOptions.skipDuplicateElements = true;
// Import lights
mx::DocumentPtr lightDoc = mx::createDocument();
mx::FilePath path = _searchPath.find(_lightFileName);
if (!path.isEmpty())
{
try
{
mx::readFromXmlFile(lightDoc, path.asString());
lightDoc->setSourceUri(path);
doc->importLibrary(lightDoc, ©Options);
}
catch (std::exception& e)
{
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Cannot load light library file: " + path.asString(), e.what());
}
}
// Scan for lights
std::vector<mx::NodePtr> lights;
for (mx::NodePtr node : doc->getNodes())
{
const mx::TypeDesc* type = mx::TypeDesc::get(node->getType());
if (type == mx::Type::LIGHTSHADER)
{
lights.push_back(node);
}
}
// Create a new light handler
_lightHandler = mx::LightHandler::create();
try
{
// Set lights on the generator. Set to empty if no lights found
_lightHandler->setLightSources(lights);
if (!lights.empty())
{
// Create a list of unique nodedefs and ids for them
std::unordered_map<std::string, unsigned int> identifiers;
_lightHandler->mapNodeDefToIdentiers(lights, identifiers);
for (auto id : identifiers)
{
mx::NodeDefPtr nodeDef = doc->getNodeDef(id.first);
if (nodeDef)
{
mx::HwShaderGenerator::bindLightShader(*nodeDef, id.second, _genContext);
}
else
{
new ng::MessageDialog(this, ng::MessageDialog::Type::Information, "Failed to light nodedef: ", id.first);
}
}
// Clamp the number of light sources to the number found
unsigned int lightSourceCount = static_cast<unsigned int>(_lightHandler->getLightSources().size());
_genContext.getOptions().hwMaxActiveLightSources = lightSourceCount;
}
// Set up IBL inputs
_lightHandler->setLightEnvRadiancePath(_searchPath.find(_envRadiancePath));
_lightHandler->setLightEnvIrradiancePath(_searchPath.find(_envIrradiancePath));
}
catch (std::exception& e)
{
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Failed to set up lighting", e.what());
}
}
void Viewer::assignMaterial(mx::MeshPartitionPtr geometry, MaterialPtr material)
{
const mx::MeshList& meshes = _geometryHandler->getMeshes();
if (meshes.empty() || !geometry)
{
return;
}
if (material)
{
material->bindMesh(meshes[0]);
_materialAssignments[geometry] = material;
}
else
{
_materialAssignments.erase(geometry);
}
if (geometry == getSelectedGeometry())
{
setSelectedMaterial(material);
updatePropertyEditor();
}
}
void Viewer::createLoadMeshInterface(Widget* parent, const std::string& label)
{
ng::Button* meshButton = new ng::Button(parent, label);
meshButton->setIcon(ENTYPO_ICON_FOLDER);
meshButton->setCallback([this]()
{
mProcessEvents = false;
std::string filename = ng::file_dialog({ { "obj", "Wavefront OBJ" } }, false);
if (!filename.empty())
{
_geometryHandler->clearGeometry();
if (_geometryHandler->loadGeometry(filename))
{
_meshFilename = filename;
const mx::MeshList& meshes = _geometryHandler->getMeshes();
if (!meshes.empty())
{
if (_splitByUdims)
{
meshes[0]->splitByUdims();
}
}
updateGeometrySelections();
// Assign the selected material to all geometries.
_materialAssignments.clear();
MaterialPtr material = getSelectedMaterial();
if (material)
{
for (mx::MeshPartitionPtr geom : _geometryList)
{
assignMaterial(geom, material);
}
}
initCamera();
}
else
{
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Mesh Loading Error", filename);
}
}
mProcessEvents = true;
});
}
void Viewer::createLoadMaterialsInterface(Widget* parent, const std::string& label)
{
ng::Button* materialButton = new ng::Button(parent, label);
materialButton->setIcon(ENTYPO_ICON_FOLDER);
materialButton->setCallback([this]()
{
mProcessEvents = false;
std::string filename = ng::file_dialog({ { "mtlx", "MaterialX" } }, false);
if (!filename.empty())
{
_materialFilename = filename;
assignMaterial(getSelectedGeometry(), nullptr);
loadDocument(_materialFilename, _stdLib);
}
mProcessEvents = true;
});
}
void Viewer::createAdvancedSettings(Widget* parent)
{
ng::PopupButton* advancedButton = new ng::PopupButton(parent, "Advanced Settings");
advancedButton->setIcon(ENTYPO_ICON_TOOLS);
advancedButton->setChevronIcon(-1);
ng::Popup* advancedPopup = advancedButton->popup();
advancedPopup->setLayout(new ng::GroupLayout());
new ng::Label(advancedPopup, "Mesh Options");
ng::CheckBox* splitUdimsBox = new ng::CheckBox(advancedPopup, "Split By UDIMs");
splitUdimsBox->setChecked(_splitByUdims);
splitUdimsBox->setCallback([this](bool enable)
{
_splitByUdims = enable;
});
new ng::Label(advancedPopup, "Material Options");
ng::CheckBox* mergeMaterialsBox = new ng::CheckBox(advancedPopup, "Merge Materials");
mergeMaterialsBox->setChecked(_mergeMaterials);
mergeMaterialsBox->setCallback([this](bool enable)
{
_mergeMaterials = enable;
});
new ng::Label(advancedPopup, "Lighting Options");
ng::CheckBox* directLightingBox = new ng::CheckBox(advancedPopup, "Direct lighting");
directLightingBox->setChecked(_directLighting);
directLightingBox->setCallback([this](bool enable)
{
_directLighting = enable;
});
ng::CheckBox* indirectLightingBox = new ng::CheckBox(advancedPopup, "Indirect lighting");
indirectLightingBox->setChecked(_indirectLighting);
indirectLightingBox->setCallback([this](bool enable)
{
_indirectLighting = enable;
});
ng::CheckBox* ambientOcclusionBox = new ng::CheckBox(advancedPopup, "Ambient Occlusion");
ambientOcclusionBox->setChecked(_ambientOcclusion);
ambientOcclusionBox->setCallback([this](bool enable)
{
_ambientOcclusion = enable;
});
new ng::Label(advancedPopup, "Render Options");
ng::CheckBox* outlineSelectedGeometryBox = new ng::CheckBox(advancedPopup, "Outline Selected Geometry");
outlineSelectedGeometryBox->setChecked(_outlineSelection);
outlineSelectedGeometryBox->setCallback([this](bool enable)
{
_outlineSelection = enable;
});
ng::CheckBox* transparencyBox = new ng::CheckBox(advancedPopup, "Render Transparency");
transparencyBox->setChecked(_genContext.getOptions().hwTransparency);
transparencyBox->setCallback([this](bool enable)
{
_genContext.getOptions().hwTransparency = enable;
reloadShaders();
});
ng::CheckBox* drawEnvironmentBox = new ng::CheckBox(advancedPopup, "Render Environment");
drawEnvironmentBox->setChecked(_drawEnvironment);
drawEnvironmentBox->setCallback([this](bool enable)
{
_drawEnvironment = enable;
});
if (_specularEnvironmentMethod == mx::SPECULAR_ENVIRONMENT_FIS)
{
Widget* sampleGroup = new Widget(advancedPopup);
sampleGroup->setLayout(new ng::BoxLayout(ng::Orientation::Horizontal));
new ng::Label(sampleGroup, "Environment Samples:");
mx::StringVec sampleOptions;
for (int i = MIN_ENV_SAMPLES; i <= MAX_ENV_SAMPLES; i *= 4)
{
mProcessEvents = false;
sampleOptions.push_back(std::to_string(i));
mProcessEvents = true;
}
ng::ComboBox* sampleBox = new ng::ComboBox(sampleGroup, sampleOptions);
sampleBox->setChevronIcon(-1);
sampleBox->setSelectedIndex((int)std::log2(DEFAULT_ENV_SAMPLES / MIN_ENV_SAMPLES) / 2);
sampleBox->setCallback([this](int index)
{
_envSamples = MIN_ENV_SAMPLES * (int) std::pow(4, index);
});
}
}
void Viewer::updateGeometrySelections()
{
_geometryList.clear();
if (_geometryHandler->getMeshes().empty())
{
return;
}
mx::MeshPtr mesh = _geometryHandler->getMeshes()[0];
if (_wireMaterial)
{
_wireMaterial->bindMesh(mesh);
}
for (size_t partIndex = 0; partIndex < mesh->getPartitionCount(); partIndex++)
{
mx::MeshPartitionPtr part = mesh->getPartition(partIndex);
_geometryList.push_back(part);
}
std::vector<std::string> items;
for (const mx::MeshPartitionPtr& part : _geometryList)
{
std::string geomName = part->getIdentifier();
mx::StringVec geomSplit = mx::splitString(geomName, ":");
if (!geomSplit.empty() && !geomSplit[geomSplit.size() - 1].empty())
{
geomName = geomSplit[geomSplit.size() - 1];
}
items.push_back(geomName);
}
_geometryListBox->setItems(items);
_geomLabel->setVisible(items.size() > 1);
_geometryListBox->setVisible(items.size() > 1);
_selectedGeom = 0;
// Create ambient occlusion material.
const mx::StringMap aoStringMap = { { ".obj", "_ao.png" } };
std::string aoImagePath = mx::replaceSubstrings(_meshFilename, aoStringMap);
aoImagePath = _searchPath.find(aoImagePath);
if (mx::FilePath(aoImagePath).exists())
{
try
{
mx::FilePath ambOccFilename = _searchPath.find(
mx::FilePath("resources/Materials/TestSuite/Utilities/Lights/ambient_occlusion.mtlx"));
_ambOccMaterial = Material::create();
_ambOccMaterial->generateAmbOccShader(_genContext, ambOccFilename, _stdLib, aoImagePath);
_ambOccMaterial->bindMesh(mesh);
}
catch (std::exception& e)
{
_ambOccMaterial = nullptr;
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Failed to generate ambient occlusion shader", e.what());
}
}
else
{
_ambOccMaterial = nullptr;
}
performLayout();
}
void Viewer::updateMaterialSelections()
{
std::vector<std::string> items;
for (auto material : _materials)
{
mx::ElementPtr displayElem = material->getElement();
if (displayElem->isA<mx::ShaderRef>())
{
displayElem = displayElem->getParent();
}
std::string displayName = displayElem->getNamePath();
if (!material->getUdim().empty())
{
displayName += " (" + material->getUdim() + ")";
}
items.push_back(displayName);
}
_materialSelectionBox->setItems(items);
_materialLabel->setVisible(items.size() > 1);
_materialSelectionBox->setVisible(items.size() > 1);
performLayout();
}
void Viewer::updateMaterialSelectionUI()
{
for (const auto& pair : _materialAssignments)
{
if (pair.first == getSelectedGeometry())
{
for (size_t i = 0; i < _materials.size(); i++)
{
if (_materials[i] == pair.second)
{
_materialSelectionBox->setSelectedIndex((int) i);
break;
}
}
}
}
}
void Viewer::loadDocument(const mx::FilePath& filename, mx::DocumentPtr libraries)
{
// Set up read options.
mx::XmlReadOptions readOptions;
readOptions.readXIncludeFunction = [](mx::DocumentPtr doc, const std::string& filename,
const std::string& searchPath, const mx::XmlReadOptions* options)
{
mx::FilePath resolvedFilename = mx::FileSearchPath(searchPath).find(filename);
if (resolvedFilename.exists())
{
readFromXmlFile(doc, resolvedFilename, searchPath, options);
}
else
{
std::cerr << "Include file not found: " << filename << std::endl;
}
};
// Clear user data on the generator.
_genContext.clearUserData();
// Clear materials if merging is not requested.
if (!_mergeMaterials)
{
for (mx::MeshPartitionPtr geom : _geometryList)
{
if (_materialAssignments.count(geom))
{
assignMaterial(geom, nullptr);
}
}
_materials.clear();
}
std::vector<MaterialPtr> newMaterials;
try
{
// Load source document.
mx::DocumentPtr doc = mx::createDocument();
mx::readFromXmlFile(doc, filename, _searchPath.asString(), &readOptions);
// Import libraries.
mx::CopyOptions copyOptions;
copyOptions.skipDuplicateElements = true;
doc->importLibrary(libraries, ©Options);
// Add lighting
setupLights(doc);
// Apply modifiers to the content document.
applyModifiers(doc, _modifiers);
// Validate the document.
std::string message;
if (!doc->validate(&message))
{
std::cerr << "*** Validation warnings for " << _materialFilename.getBaseName() << " ***" << std::endl;
std::cerr << message;
}
// Find new renderable elements.
mx::StringVec renderablePaths;
std::vector<mx::TypedElementPtr> elems;
mx::findRenderableElements(doc, elems);
for (mx::TypedElementPtr elem : elems)
{
renderablePaths.push_back(elem->getNamePath());
}
// Check for any udim set.
mx::ValuePtr udimSetValue = doc->getGeomAttrValue("udimset");
// Create new materials.
for (auto renderablePath : renderablePaths)
{
mx::ElementPtr elem = doc->getDescendant(renderablePath);
mx::TypedElementPtr typedElem = elem ? elem->asA<mx::TypedElement>() : nullptr;
if (!typedElem)
{
continue;
}
if (udimSetValue && udimSetValue->isA<mx::StringVec>())
{
for (const std::string& udim : udimSetValue->asA<mx::StringVec>())
{
MaterialPtr mat = Material::create();
mat->setDocument(doc);
mat->setElement(typedElem);
mat->setUdim(udim);
newMaterials.push_back(mat);
}
}
else
{
MaterialPtr mat = Material::create();
mat->setDocument(doc);
mat->setElement(typedElem);
newMaterials.push_back(mat);
}
}
size_t assignedGeoms = 0;
if (!newMaterials.empty())
{
// Add new materials to the global vector.
_materials.insert(_materials.end(), newMaterials.begin(), newMaterials.end());
// Set the default image search path.
mx::FilePath materialFolder = _materialFilename;
materialFolder.pop();
_imageHandler->setSearchPath(mx::FileSearchPath(materialFolder));
// Clear cached implementations, in case libraries on the file system have changed.
_genContext.clearNodeImplementations();
mx::MeshPtr mesh = _geometryHandler->getMeshes()[0];
for (MaterialPtr mat : newMaterials)
{
// Generate a shader for the new material.
mat->generateShader(_genContext);
// Apply geometric assignments specified in the document, if any.
mx::TypedElementPtr elem = mat->getElement();
mx::ShaderRefPtr shaderRef = elem->asA<mx::ShaderRef>();
mx::MaterialPtr materialRef = shaderRef ? shaderRef->getParent()->asA<mx::Material>() : nullptr;
if (materialRef)
{
for (size_t partIndex = 0; partIndex < _geometryList.size(); partIndex++)
{
mx::MeshPartitionPtr part = _geometryList[partIndex];
std::string partGeomName = part->getIdentifier();
if (!materialRef->getGeometryBindings(partGeomName).empty())
{
assignMaterial(part, mat);
assignedGeoms++;
}
}
}
// Apply implicit udim assignments, if any.
std::string udim = mat->getUdim();
if (!udim.empty())
{
for (mx::MeshPartitionPtr geom : _geometryList)
{
if (!_materialAssignments[geom] && geom->getIdentifier() == udim)
{
assignMaterial(geom, mat);
}
}
}
}
// Apply fallback assignments.
for (mx::MeshPartitionPtr geom : _geometryList)
{
if (!_materialAssignments[geom])
{
assignMaterial(geom, newMaterials[0]);
}
}
}
}
catch (std::exception& e)
{
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Failed to load material", e.what());
return;
}
// Update material UI.
updateMaterialSelections();
updateMaterialSelectionUI();
}
void Viewer::reloadShaders()
{
try
{
for (MaterialPtr material : _materials)
{
material->generateShader(_genContext);
}
}
catch (std::exception& e)
{
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Shader Generation Error", e.what());
}
}
void Viewer::saveShaderSource()
{
try
{
MaterialPtr material = getSelectedMaterial();
mx::TypedElementPtr elem = material ? material->getElement() : nullptr;
if (elem)
{
mx::ShaderPtr shader = createShader(elem->getNamePath(), _genContext, elem);
if (shader)
{
std::string vertexShader = shader->getSourceCode(mx::Stage::VERTEX);
std::string pixelShader = shader->getSourceCode(mx::Stage::PIXEL);
std::string baseName = _searchPath[0] / elem->getName();
writeTextFile(vertexShader, baseName + "_vs.glsl");
writeTextFile(pixelShader, baseName + "_ps.glsl");
new ng::MessageDialog(this, ng::MessageDialog::Type::Information, "Saved GLSL source: ", baseName);
}
}
}
catch (std::exception& e)
{
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Cannot save source for material", e.what());
}
}
void Viewer::loadShaderSource()
{
try
{
MaterialPtr material = getSelectedMaterial();
mx::TypedElementPtr elem = material ? material->getElement() : nullptr;
if (elem)
{
std::string elementName = elem->getName();
std::string baseName = _searchPath[0] / elementName;
std::string vertexShaderFile = baseName + "_vs.glsl";
std::string pixelShaderFile = baseName + "_ps.glsl";
// Ignore transparency for now as we can't know from the source code
// if the shader is transparent or not.
if (material->loadSource(vertexShaderFile, pixelShaderFile, baseName, false))
{
assignMaterial(getSelectedGeometry(), material);
new ng::MessageDialog(this, ng::MessageDialog::Type::Information, "Loaded GLSL source: ", baseName);
}
}
}
catch (std::exception& e)
{
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Cannot load source for material", e.what());
}
}
void Viewer::saveDotFiles()
{
try
{
MaterialPtr material = getSelectedMaterial();
mx::TypedElementPtr elem = material ? material->getElement() : nullptr;
if (elem)
{
mx::ShaderRefPtr shaderRef = elem->asA<mx::ShaderRef>();
if (shaderRef)
{
for (mx::BindInputPtr bindInput : shaderRef->getBindInputs())
{
mx::OutputPtr output = bindInput->getConnectedOutput();
mx::ConstNodeGraphPtr nodeGraph = output ? output->getAncestorOfType<mx::NodeGraph>() : nullptr;
if (nodeGraph)
{
std::string dot = nodeGraph->asStringDot();
std::string baseName = _searchPath[0] / nodeGraph->getName();
writeTextFile(dot, baseName + ".dot");
}
}
mx::NodeDefPtr nodeDef = shaderRef->getNodeDef();
mx::InterfaceElementPtr implement = nodeDef ? nodeDef->getImplementation() : nullptr;
mx::NodeGraphPtr nodeGraph = implement ? implement->asA<mx::NodeGraph>() : nullptr;
if (nodeGraph)
{
std::string dot = nodeGraph->asStringDot();
std::string baseName = _searchPath[0] / nodeDef->getName();
writeTextFile(dot, baseName + ".dot");
}
}
}
}
catch (std::exception& e)
{
new ng::MessageDialog(this, ng::MessageDialog::Type::Warning, "Cannot save dot file for material", e.what());
}
}
bool Viewer::keyboardEvent(int key, int scancode, int action, int modifiers)
{