physicallyBasedMaterialXCmd.py File Reference

Convert Physically Based Materials to MaterialX Command Line Utility. More...

Go to the source code of this file.

Functions
	materialxMaterials.physicallyBasedMaterialXCmd.physicallBasedMaterialXCmd ()

Detailed Description

Convert Physically Based Materials to MaterialX Command Line Utility.

This script converts Physically Based Materials to MaterialX using the MaterialX Python API.

The script can be run from the command line with the following options:

–shadingModel: Shading models to use for conversion. If not specified then all will be used.

Options: standard_surface, gltf_pbr, open_pbr_surface

–outputDir: Output directory for MaterialX files

–writeJSON: Write materials JSON file. Default is True

–separateFiles: Convert individual MaterialX files per material. Default is false

Example usage:

• python physicallyBasedMaterialXCmd.py

• python physicallyBasedMaterialXCmd.py –outputDir=myfolder

• python physicallyBasedMaterialXCmd.py –writeJSON=False

• python physicallyBasedMaterialXCmd.py –shadingModel=gltf_pbr,open_pbr_surface

• python physicallyBasedMaterialXCmd.py –shadingModel=open_pbr_surface –separateFiles=True

Definition in file physicallyBasedMaterialXCmd.py.

Function Documentation

physicallBasedMaterialXCmd()

materialxMaterials.physicallyBasedMaterialXCmd.physicallBasedMaterialXCmd

(

)

Definition at line 24 of file physicallyBasedMaterialXCmd.py.

def physicallBasedMaterialXCmd():
    logger = logging.getLogger('PB_CMD')
    logging.basicConfig(level=logging.INFO)
 
    # TODO: Add arguments for shading model, and output directory using argparse
    parser = argparse.ArgumentParser(description='Convert Physically Based Materials to MaterialX')
    parser.add_argument('--shadingModel', type=str, default='', help='Shading models to use for conversion. '
                        ' If not specified then all will be used. '
                        ' Options: standard_surface, gltf_pbr, open_pbr_surface')
    parser.add_argument('--outputDir', type=str, default='', 
                        help='Output directory for MaterialX files. Default location is PhysicallyBasedMaterialX')
    parser.add_argument('--writeJSON', type=bool, default=True, 
                        help='Write materials JSON file. Default is True')
    parser.add_argument('--separateFiles', type=bool, default=False, 
                        help='Convert individual MaterialX files per material. Default is false')
    parser.add_argument('--loadFromFile', type=str, default='', help='Load materials a specified file')
    opts = parser.parse_args()
 
    outputDir = 'PhysicallyBasedMaterialX'
    if opts.outputDir:
        if not os.path.exists(opts.outputDir):
            logger.info(f'Error: Output directory does not exist: {opts.outputDir}')
            sys.exit(1)
        else:
            outputDir = opts.outputDir
 
    shadingModels = []
    if opts.shadingModel:
        shadingModels = opts.shadingModel.split(',')        
    shadingModePrefixMap = { 'standard_surface': 'SS', 'gltf_pbr': 'GLTF', 'open_pbr_surface': 'OPBR' }
    shadingModelPrefixes = []
    if len(shadingModels) == 0:
        shadingModels = ['standard_surface', 'gltf_pbr', 'open_pbr_surface']
        shadingModelPrefixes = ['SS', 'GLTF', 'OPBR']
    else:
        for shadingModel in shadingModels:
            shadingModelPrefixes.append(shadingModePrefixMap[shadingModel])
 
    writeJSON = opts.writeJSON
    separateFiles = opts.separateFiles
 
    # Create loader and get PhysicallyBasedMaterials
    jsonMat = None
    loader = pbmx.PhysicallyBasedMaterialLoader(mx, None)
    if opts.loadFromFile:
        if not os.path.exists(opts.loadFromFile):
            logger.info(f'> Error: File does not exist: {opts.loadFromFile}')
            sys.exit(1)
        logger.info(f'> Load materials from file: {opts.loadFromFile}')
        jsonMat = loader.loadMaterialsFromFile(opts.loadFromFile)
    else:
        jsonMat = loader.getMaterialsFromURL()
 
    if jsonMat:
 
        # Create folder for MaterialX call PhysicallyBasedMaterialX
        os.makedirs(outputDir, exist_ok=True)
 
        if writeJSON:
            logger.info(f'> Write: {outputDir}/PhysicallyBasedMaterial.json')
            loader.writeJSONToFile(os.path.join(outputDir, 'PhysicallyBasedMaterial.json'))
 
        if not separateFiles:
            for shadingModel, prefix in zip(shadingModels, shadingModelPrefixes):
                logger.info(f'> Generate MaterialX for shading model: {shadingModel}')
                matdoc = loader.convertToMaterialX([], shadingModel, {}, prefix)
                valid, errors = loader.validateMaterialXDocument(matdoc)
                if valid:
                    fileName = os.path.join(outputDir, f'PhysicallyBasedMaterialX_{prefix}.mtlx')
                    loader.writeMaterialXToFile(fileName)
                    logger.info(f'> Write: {fileName}')
    
        else:
            for shadingModel, prefix in zip(shadingModels, shadingModelPrefixes):
                logger.info(f'> Generate MaterialX for shading model: {shadingModel}')
                for mat in loader.getJSONMaterialNames():
                    materialFilter = [mat]
                    matdoc = loader.convertToMaterialX(materialFilter, shadingModel, {}, prefix)
                    if matdoc is not None:
                        valid, errors = loader.validateMaterialXDocument(matdoc)
                        if valid:
                            fileName = os.path.join(outputDir, f'PB_{prefix}_{mat}.mtlx')
                            loader.writeMaterialXToFile(fileName)
                            logger.info(f'> Write: {fileName}')
 
    else:
        logger.info('Could not retrieve PhysicallyBased Materials')