Method createNode

source/MaterialXGenShader/UnitSystem.cpp:172–202

}

ShaderNodePtr UnitSystem::createNode(ShaderGraph* parent, const UnitTransform& transform, const string& name,
                                     GenContext& context) const
{
    NodeDefPtr nodeDef = getNodeDef(transform);
    if (!nodeDef)
    {
        throw ExceptionShaderGenError("No nodedef found for transform: ('" + transform.sourceUnit + "', '" + transform.targetUnit + "').");
    }

    // Scalar unit conversion
    UnitTypeDefPtr scalarTypeDef = _document->getUnitTypeDef(transform.unitType);
    if (!_unitRegistry || !_unitRegistry->getUnitConverter(scalarTypeDef))
    {
        throw ExceptionTypeError("Unit registry unavailable or undefined unit converter for: " + transform.unitType);
    }
    LinearUnitConverterPtr scalarConverter = std::dynamic_pointer_cast<LinearUnitConverter>(_unitRegistry->getUnitConverter(scalarTypeDef));

    // Create the node.
    ShaderNodePtr shaderNode = ShaderNode::create(parent, name, *nodeDef, context);

    // Set ports on the node.
    ShaderInput* in2 = shaderNode->getInput("in2");
    if (!in2)
    {
        throw ExceptionShaderGenError("Invalid node signature for unit transform: ('" + transform.sourceUnit + "', '" + transform.targetUnit + "').");
    }
    float conversionRatio = scalarConverter->conversionRatio(transform.sourceUnit, transform.targetUnit);
    in2->setValue(Value::createValue(conversionRatio));

    return shaderNode;
}

MATERIALX_NAMESPACE_END