af0cfcb01c
Switch from Standard Surface to OpenPBR as the exported MaterialX surface, since this is the new standard more renderers are adopting and it more closely matches the Principled BSDF implementation. Anisotropy support is improved though still not quite the same, as formulas are different. Nodes are generated to apply anisotropic rotation to the tangent vector, as there is no corresponding parameter in OpenPBR. Fixes #138164 Authored by Apple: Lee Kerley Pull Request: https://projects.blender.org/blender/blender/pulls/138165
94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
/* SPDX-FileCopyrightText: 2011-2022 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include <MaterialXFormat/XmlIo.h>
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#include "node_parser.h"
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#include "DEG_depsgraph.hh"
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#include "DNA_material_types.h"
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#include "NOD_shader.h"
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#include "material.h"
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namespace blender::nodes::materialx {
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class DefaultMaterialNodeParser : public NodeParser {
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public:
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using NodeParser::NodeParser;
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NodeItem compute() override
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{
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const Material *material = graph_.material;
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NodeItem surface = create_node(
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"open_pbr_surface",
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NodeItem::Type::SurfaceShader,
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{{"base_weight", val(1.0f)},
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{"base_color", val(MaterialX::Color3(material->r, material->g, material->b))},
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{"base_diffuse_roughness", val(material->roughness)},
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{"specular_weight", val(material->spec)},
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{"base_metalness", val(material->metallic)}});
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NodeItem res = create_node(
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"surfacematerial", NodeItem::Type::Material, {{"surfaceshader", surface}});
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return res;
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}
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NodeItem compute_error()
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{
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NodeItem surface = create_node("open_pbr_surface",
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NodeItem::Type::SurfaceShader,
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{{"base_color", val(MaterialX::Color3(1.0f, 0.0f, 1.0f))}});
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NodeItem res = create_node(
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"surfacematerial", NodeItem::Type::Material, {{"surfaceshader", surface}});
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return res;
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}
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};
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MaterialX::DocumentPtr export_to_materialx(Depsgraph *depsgraph,
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Material *material,
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const ExportParams &export_params)
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{
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CLOG_INFO(LOG_MATERIALX_SHADER, 0, "Material: %s", material->id.name);
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MaterialX::DocumentPtr doc = MaterialX::createDocument();
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NodeItem output_item;
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NodeGraph graph(depsgraph, material, export_params, doc);
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if (material->use_nodes) {
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material->nodetree->ensure_topology_cache();
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bNode *output_node = ntreeShaderOutputNode(material->nodetree, SHD_OUTPUT_ALL);
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if (output_node && output_node->typeinfo->materialx_fn) {
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NodeParserData data = {graph, NodeItem::Type::Material, nullptr, graph.empty_node()};
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output_node->typeinfo->materialx_fn(&data, output_node, nullptr);
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output_item = data.result;
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}
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else {
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output_item = DefaultMaterialNodeParser(
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graph, nullptr, nullptr, NodeItem::Type::Material, nullptr)
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.compute_error();
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}
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}
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else {
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output_item = DefaultMaterialNodeParser(
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graph, nullptr, nullptr, NodeItem::Type::Material, nullptr)
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.compute();
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}
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/* This node is expected to have a specific name to link up to USD. */
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graph.set_output_node_name(output_item);
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CLOG_INFO(LOG_MATERIALX_SHADER,
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1,
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"Material: %s\n%s",
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material->id.name,
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MaterialX::writeToXmlString(doc).c_str());
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return doc;
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}
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} // namespace blender::nodes::materialx
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