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MaterialXLoader.js
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MaterialXLoader.js
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import {
Color,
FileLoader,
Loader,
TextureLoader,
RepeatWrapping,
ClampToEdgeWrapping,
MirroredRepeatWrapping,
} from '../../../build/three.module.js';
import * as Nodes from '../nodes/Nodes.js';
const UV_ADDRESS_MODE = {
constant: ClampToEdgeWrapping, // TODO: Incorrect.
clamp: ClampToEdgeWrapping,
periodic: RepeatWrapping,
mirror: MirroredRepeatWrapping
}
const SUPPORTED_SURFACE_SHADERS = [
'standard_surface',
'disney_brdf_2012',
'disney_brdf_2015',
];
const SUPPORTED_DISPLACEMENT_SHADERS = [];
class MaterialXLoader extends Loader {
constructor( manager ) {
super( manager );
}
load( url, onLoad, onProgress, onError ) {
const scope = this;
new FileLoader( scope.manager )
.setPath( scope.path )
.load( url, async function ( text ) {
try {
onLoad( await scope.parseAsync( text ) );
} catch ( e ) {
onError( e );
}
}, onProgress, onError );
return this;
}
parse( text ) {
return new MaterialXParser( this.manager, this.path ).parse( text );
}
async parseAsync( text ) {
const parser = new MaterialXParser( this.manager, this.path );
console.time('MaterialXLoader.parse');
let result;
try {
result = parser.parse( text );
} finally {
console.timeEnd('MaterialXLoader.parse');
}
//
await Promise.all( parser.pending );
return result;
}
}
class MaterialXParser {
constructor( manager, path ) {
this.manager = manager;
this.path = path;
this.resourcePath = '';
this.textureLoader = new TextureLoader( manager );
this.nodeGraphDefs = {};
this.surfaceShaderDefs = {};
this.displacementShaderDefs = {};
this.nodeCache = new WeakMap();
this.pending = [];
}
parse( text ) {
const scope = this;
const dom = new DOMParser().parseFromString( text, 'application/xml' );
const version = dom.documentElement.getAttribute( 'version' );
if ( version !== '1.38' ) {
console.warn( `THREE.MaterialXLoader: Expected MaterialX version v1.38, found v${version}.` );
}
console.log( dom.documentElement ); // TODO: Clean up.
const filePrefix = dom.documentElement.getAttribute( 'fileprefix' );
this.resourcePath = filePrefix ? new URL( filePrefix, this.path ).href : this.path;
this.textureLoader.setPath( this.resourcePath );
//
const materialDefs = [];
for ( const nodeDef of dom.documentElement.children ) {
const name = nodeDef.getAttribute( 'name' );
const nodeName = nodeDef.nodeName;
const nodeType = nodeDef.getAttribute( 'type' )
if ( nodeType === 'material' ) {
materialDefs.push( nodeDef );
} else if ( nodeType === 'surfaceshader' ) {
this.surfaceShaderDefs[ name ] = nodeDef;
} else if ( nodeName === 'displacementshader' ) {
this.displacementShaderDefs[ name ] = nodeDef;
} else if ( nodeName === 'nodegraph' ) {
this.nodeGraphDefs[ name ] = nodeDef;
} else {
console.warn( `THREE.MaterialXLoader: Unexpected root node type, "${ nodeName }".` );
}
}
//
const materials = {};
for ( const surfaceMaterialDef of materialDefs ) {
const material = this.parseSurfaceMaterial( surfaceMaterialDef );
materials[ material.name ] = material;
}
//
return { materials };
}
parseSurfaceMaterial( surfaceMaterialDef ) {
const materialName = surfaceMaterialDef.getAttribute( 'name' );
let surfaceShaderDef;
let displacementShaderDef;
for ( const inputDef of surfaceMaterialDef.children ) {
const inputType = inputDef.getAttribute( 'type' );
const inputName = inputDef.getAttribute( 'nodename' );
if ( inputType === 'surfaceshader' ) {
const nodeDef = this.surfaceShaderDefs[ inputName ];
if ( ! SUPPORTED_SURFACE_SHADERS.includes( nodeDef.nodeName ) ) continue;
surfaceShaderDef = nodeDef;
} else if ( inputType === 'displacementshader' ) {
const nodeDef = this.displacementShaderDefs[ inputName ];
if ( ! SUPPORTED_DISPLACEMENT_SHADERS.includes( nodeDef.nodeName ) ) continue;
displacementShaderDef = nodeDef;
}
}
if ( ! surfaceShaderDef ) {
console.warn( `THREE.MaterialXLoader: No supported surface shader found for "${ materialName }".` );
return null;
}
//
let material;
if ( surfaceShaderDef.nodeName === 'standard_surface' ) {
material = this.parseStandardSurface( surfaceShaderDef );
} else if ( surfaceShaderDef.nodeName === 'disney_brdf_2012' ) {
material = this.parseDisneyBRDF2012( surfaceShaderDef );
} else if ( surfaceShaderDef.nodeName === 'disney_brdf_2012' ) {
material = this.parseDisneyBRDF2015( surfaceShaderDef );
} else {
console.warn( `THREE.MaterialXLoader: Unsupported surface shader, "${ surfaceShaderDef.nodeName }".` );
return null;
}
if ( displacementShaderDef ) {
// material.position = ...
// material.normal = ...
console.warn( `THREE.MaterialXLoader: Displacement shader not yet implemented.` );
}
material.name = materialName;
return material;
}
/**
* Reference: https://github.com/materialx/MaterialX/blob/main/libraries/bxdf/standard_surface.mtlx
*/
parseStandardSurface( surfaceDef ) {
const material = new Nodes.MeshStandardNodeMaterial();
material.color.set( 0.8, 0.8, 0.8 );
material.roughness = 0.2;
material.metalness = 0;
material.opacity = 1;
for ( const inputDef of surfaceDef.children ) {
switch ( inputDef.getAttribute( 'name' ) ) {
case 'base':
case 'base_color': {
material.color = ( material.color && material.color.isNode )
? new Nodes.OperatorNode( material.color, this.parseInput( inputDef ), Nodes.OperatorNode.MUL )
: this.parseInput( inputDef );
} break;
case 'opacity':
material.opacity = this.parseInput( inputDef );
break;
case 'specular_roughness':
material.roughness = this.parseInput( inputDef );
break;
case 'metalness':
material.metalness = this.parseInput( inputDef );
break;
case 'emission':
case 'emission_color': {
material.emissive = ( material.emissive && material.emissive.isNode )
? new Nodes.OperatorNode( material.emissive, this.parseInput( inputDef ), Nodes.OperatorNode.MUL )
: this.parseInput( inputDef );
} break;
case 'diffuse_roughness':
case 'specular':
case 'specular_color':
case 'specular_IOR':
case 'specular_anisotropy':
case 'specular_rotation':
case 'transmission':
case 'transmission_color':
case 'transmission_depth':
case 'transmission_scatter':
case 'transmission_scatter_anisotropy':
case 'transmission_dispersion':
case 'transmission_extra_roughness':
case 'subsurface':
case 'subsurface_color':
case 'subsurface_radius':
case 'subsurface_scale':
case 'subsurface_anisotropy':
case 'sheen':
case 'sheen_color':
case 'sheen_roughness':
case 'thin_walled':
case 'coat':
case 'coat_color':
case 'coat_roughness':
case 'coat_anisotropy':
case 'coat_rotation':
case 'coat_IOR':
case 'coat_affect_color':
case 'coat_affect_roughness':
case 'thin_film_thickness':
case 'thin_film_IOR':
console.warn( `THREE.MaterialXLoader: Unsupported material input, "${ inputDef.getAttribute( 'name' ) }".` );
}
}
return material;
}
/**
* Reference: https://github.com/materialx/MaterialX/blob/main/libraries/bxdf/disney_brdf_2012.mtlx
*/
parseDisneyBRDF2012( surfaceDef ) {
const material = new Nodes.MeshStandardNodeMaterial();
for ( const inputDef of surfaceDef.children ) {
switch ( inputDef.getAttribute( 'name' ) ) {
case 'baseColor': // TODO: Default 0.16, 0.16, 0.16.
material.color = this.parseInput( inputDef );
break;
case 'metallic': // TODO: Default 0.
material.metalness = this.parseInput( inputDef );
break;
case 'roughness': // TODO: Default 0.5.
material.roughness = this.parseInput( inputDef );
break;
case 'subsurface': // Default 0.
case 'specular': // Default 0.5.
case 'specularTint': // Default 0.
case 'anisotropic': // Default 0.
case 'sheen': // Default 0.
case 'sheenTint': // Default 0.5.
case 'clearcoat': // Default 0.
case 'clearcoatGloss': // Default 1.
console.warn( `THREE.MaterialXLoader: Unsupported material property, "${ inputDef.getAttribute( 'name' ) }".` );
}
}
return material;
}
/**
* Reference: https://github.com/materialx/MaterialX/blob/main/libraries/bxdf/disney_brdf_2015.mtlx
*/
parseDisneyBRDF2015( surfaceDef ) {
const material = new Nodes.MeshStandardNodeMaterial();
for ( const inputDef of surfaceDef.children ) {
switch ( inputDef.getAttribute( 'name' ) ) {
case 'baseColor': // TODO: Default 0.16, 0.16, 0.16.
material.color = this.parseInput( inputDef );
break;
case 'metallic': // TODO: Default 0.
material.metalness = this.parseInput( inputDef );
break;
case 'roughness': // TODO: Default 0.5.
material.roughness = this.parseInput( inputDef );
break;
case 'anisotropic': // Default 0.
case 'specularTint': // Default 0.
case 'sheen': // Default 0.
case 'sheenTint': // Default 0.5.
case 'clearcoat': // Default 0.
case 'clearcoatGloss': // Default 1.
case 'specTrans': // Default 0.
case 'ior': // Default 1.5.
case 'scatterDistance': // Default 0, 0, 0.
case 'flatness': // Default 0.
case 'diffTrans': // Default 0.
case 'thin': // Default false. (uniform)
console.warn( `THREE.MaterialXLoader: Unsupported material property, "${ inputDef.getAttribute( 'name' ) }".` );
}
}
return material;
}
/**
* Reference:
* - https://github.com/materialx/MaterialX/tree/main/libraries/stdlib/osl
* - https://github.com/materialx/MaterialX/blob/main/libraries/stdlib/osl/mx_funcs.h
* - https://github.com/donmccurdy/three-shadenodeloader/tree/master/nodes
* - https://www.materialx.org/assets/MaterialX.v1.38D1.Spec.pdf
* - https://www.materialx.org/assets/MaterialX.v1.38.Supplement.pdf
*/
parseNode( nodeDef, nodeGraphName ) {
let node = this.nodeCache.get( nodeDef );
if ( node ) return node;
//
const inputs = this.parseInputs( nodeDef, nodeGraphName );
if ( inputs.disable ) {
// TODO: If node is disabled, skip other inputs.
return inputs.defaultinput || inputs.default;
}
//
switch ( nodeDef.nodeName ) {
// BASIC
case 'output': {
const sourceName = nodeDef.getAttribute( 'nodename' );
const sourceDef = this.nodeGraphDefs[ nodeGraphName ].querySelector(`[name=${sourceName}]`);
node = this.parseNode( sourceDef, nodeGraphName );
} break;
// PROCEDURAL
case 'constant':
node = inputs.value;
break;
case 'noise2d':
node = new Nodes.Noise2DNode( inputs.texcoord, inputs.amplitude, inputs.pivot );
break;
case 'noise3d':
node = new Nodes.Noise3DNode( inputs.position, inputs.amplitude, inputs.pivot );
break;
case 'fractal3d':
node = new Nodes.Fractal3DNode(
inputs.position,
inputs.amplitude,
inputs.octaves ? inputs.octaves.value : undefined,
inputs.lacunarity ? inputs.lacunarity.value : undefined,
inputs.diminish ? inputs.diminish.value : undefined
);
break;
case 'ramplr':
node = new Nodes.MathNode(
inputs.valuel,
inputs.valuer,
new Nodes.SwitchNode( inputs.texcoord || new Nodes.UVNode(), 'x' ),
Nodes.MathNode.MIX
);
break;
case 'ramptb':
node = new Nodes.MathNode(
inputs.valueb,
inputs.valuet,
new Nodes.SwitchNode( inputs.texcoord || new Nodes.UVNode(), 'y' ),
Nodes.MathNode.MIX
);
break;
case 'splitlr':
node = new Nodes.CondNode(
new Nodes.SwitchNode( inputs.texcoord || new Nodes.UVNode(), 'x' ),
inputs.center || new Nodes.FloatNode( 0.5 ).setReadonly( true ),
Nodes.CondNode.LESS,
inputs.valuel,
inputs.valuer
);
break;
case 'splittb':
node = new Nodes.CondNode(
new Nodes.SwitchNode( inputs.texcoord || new Nodes.UVNode(), 'y' ),
inputs.center || new Nodes.FloatNode( 0.5 ).setReadonly( true ),
Nodes.CondNode.LESS,
inputs.valueb,
inputs.valuet
);
break;
case 'cellnoise2d':
case 'cellnoise3d':
case 'worleynoise2d':
case 'worleynoise3d':
console.warn( `THREE.MaterialXLoader: Unsupported procedural node, "${ nodeDef.nodeName }".` );
break;
// GEOMETRY
case 'position':
node = new Nodes.PositionNode( inputs.space === 'world' ? Nodes.PositionNode.WORLD : undefined );
break;
case 'normal':
node = new Nodes.NormalNode( inputs.space === 'world' ? Nodes.PositionNode.WORLD : undefined );
break;
case 'tangent':
node = new Nodes.AttributeNode( 'tangent', 'vec4' );
break;
case 'texcoord':
node = new Nodes.UVNode( inputs.index );
break;
case 'geomcolor':
node = new Nodes.ColorsNode( inputs.index )
break;
case 'geompropvalue':
node = new Nodes.AttributeNode( inputs.geomprop, /* TODO: type */ );
break;
case 'bitangent':
console.warn( `THREE.MaterialXLoader: Unsupported geometry node, "${ nodeDef.nodeName }".` );
break;
// TEXTURE
case 'image':
case 'tiledimage':
node = this.parseTexture( nodeDef, nodeGraphName, inputs );
break;
case 'place2d': {
// TODO: UVTransformNode does not accept offset/scale/rotate/pivot inputs.
// TODO: Calibration material not working.
node = new Nodes.UVTransformNode( inputs.texcoord );
node.setUvTransform(
inputs.offset instanceof Nodes.Vector2Node ? inputs.offset.value.x : 0,
inputs.offset instanceof Nodes.Vector2Node ? inputs.offset.value.y : 0,
inputs.scale instanceof Nodes.Vector2Node ? inputs.scale.value.x : 1,
inputs.scale instanceof Nodes.Vector2Node ? inputs.scale.value.y : 1,
inputs.rotate instanceof Nodes.FloatNode ? inputs.rotate.value : 0,
inputs.pivot instanceof Nodes.Vector2Node ? inputs.pivot.value.x : 0,
inputs.pivot instanceof Nodes.Vector2Node ? inputs.pivot.value.y : 0
);
} break;
// GLOBAL
case 'ambientocclusion':
console.warn( `THREE.MaterialXLoader: Unsupported global node, "${ nodeDef.nodeName }".` );
break;
// APPLICATION
case 'frame':
case 'time':
case 'viewdirection':
case 'updirection':
console.warn( `THREE.MaterialXLoader: Unsupported application node, "${ nodeDef.nodeName }".` );
break;
// MATH
case 'multiply':
node = new Nodes.OperatorNode( inputs.in1, inputs.in2, Nodes.OperatorNode.MUL );
break;
case 'divide':
node = new Nodes.OperatorNode( inputs.in1, inputs.in2, Nodes.OperatorNode.DIV );
break;
case 'add':
node = new Nodes.OperatorNode( inputs.in1, inputs.in2, Nodes.OperatorNode.ADD );
break;
case 'subtract':
node = new Nodes.OperatorNode( inputs.in1, inputs.in2, Nodes.OperatorNode.SUB );
break;
case 'modulo':
node = new Nodes.MathNode( inputs.in1, inputs.in2, Nodes.MathNode.MOD );
break;
case 'absval':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.ABS );
break;
case 'sign':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.SIGN );
break;
case 'floor':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.FLOOR );
break;
case 'ceil':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.CEIL );
break;
case 'round':
console.warn( `THREE.MaterialXLoader: Unsupported math node, "${ nodeDef.nodeName }".` );
break;
case 'power':
node = new Nodes.MathNode( inputs.in1, inputs.in2, Nodes.MathNode.POW );
break;
case 'sin':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.SIN );
break;
case 'cos':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.COS );
break;
case 'tan':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.TAN );
break;
case 'asin':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.ASIN );
break;
case 'acos':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.ACOS );
break;
case 'atan2':
// TODO: Does not quite match MathNode.ARCTAN.
console.warn( `THREE.MaterialXLoader: Unsupported math node, "${ nodeDef.nodeName }".` );
break;
case 'sqrt':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.SQRT );
break;
case 'ln':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.LOG );
break;
case 'exp':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.EXP );
break;
case 'clamp':
node = new Nodes.MathNode( inputs.in, inputs.low, inputs.high, Nodes.MathNode.CLAMP );
break;
case 'min':
node = new Nodes.MathNode( inputs.in1, inputs.in2, Nodes.MathNode.MIN );
break;
case 'max':
node = new Nodes.MathNode( inputs.in1, inputs.in2, Nodes.MathNode.MAX );
break;
case 'normalize':
node = new Nodes.MathNode( inputs.in, Nodes.MathNode.NORMALIZE );
break;
case 'magnitude':
console.warn( `THREE.MaterialXLoader: Unsupported math node, "${ nodeDef.nodeName }".` );
break;
case 'dotproduct':
node = new Nodes.MathNode( inputs.in1, inputs.in2, Nodes.MathNode.DOT );
break;
case 'dot':
node = inputs.in;
break;
case 'crossproduct':
case 'transformpoint':
case 'transformvector':
case 'transformnormal':
case 'transformmatrix':
case 'normalmap':
case 'transpose':
case 'determinant':
case 'invertmatrix':
case 'rotate2d':
case 'rotate3d':
case 'arrayappend':
console.warn( `THREE.MaterialXLoader: Unsupported math node, "${ nodeDef.nodeName }".` );
break;
// ADJUSTMENT
case 'remap':
// TODO: Defaults should match type of given parameters.
node = new Nodes.RemapNode(
inputs.in,
inputs.inlow || new Nodes.FloatNode( 0 ),
inputs.inhigh || new Nodes.FloatNode( 1 ),
inputs.outlow || new Nodes.FloatNode( 0 ),
inputs.outhigh || new Nodes.FloatNode( 1 ),
);
break;
case 'smoothstep':
case 'curveadjust':
case 'curvelookup':
case 'luminance':
case 'rgbtohsv':
case 'hsvtorgb':
case 'contrast': // Supplemental.
case 'range': // Supplemental.
case 'saturate': // Supplemental.
case 'hsvadjust': // Supplemental.
console.warn( `THREE.MaterialXLoader: Unsupported adjustment node, "${ nodeDef.nodeName }".` );
break;
// COMPOSITING
case 'premult':
case 'unpremult':
case 'plus':
case 'minus':
case 'difference':
case 'burn':
case 'dodge':
case 'screen':
case 'overlay':
console.warn( `THREE.MaterialXLoader: Unsupported blend node, "${ nodeDef.nodeName }".` );
break;
case 'disjointover':
case 'in':
case 'mask':
case 'matte':
case 'out':
case 'over':
console.warn( `THREE.MaterialXLoader: Unsupported merge node, "${ nodeDef.nodeName }".` );
break;
case 'inside':
case 'outside':
console.warn( `THREE.MaterialXLoader: Unsupported masking node, "${ nodeDef.nodeName }".` );
break;
case 'mix':
node = new Nodes.MathNode( inputs.bg, inputs.fg, inputs.mix, Nodes.MathNode.MIX );
break;
// CONDITIONAL
case 'ifgreater':
node = new Nodes.CondNode( inputs.value1, inputs.value2, inputs.in1, inputs.in2, Nodes.CondNode.GREATER );
break;
case 'ifgreatereq':
node = new Nodes.CondNode( inputs.value1, inputs.value2, inputs.in1, inputs.in2, Nodes.CondNode.GREATER_EQUAL );
break;
case 'ifequal':
node = new Nodes.CondNode( inputs.value1, inputs.value2, inputs.in1, inputs.in2, Nodes.CondNode.EQUAL );
break;
case 'switch':
console.warn( `THREE.MaterialXLoader: Unsupported conditional node, "${ nodeDef.nodeName }".` );
break;
// CHANNEL
case 'convert':
case 'swizzle':
case 'combine2':
case 'combine3':
case 'combine4':
console.warn( `THREE.MaterialXLoader: Unsupported channel node, "${ nodeDef.nodeName }".` );
break;
// CONVOLUTION
case 'blur':
console.warn( `THREE.MaterialXLoader: Unsupported convolution node, "${ nodeDef.nodeName }".` );
break;
case 'heighttonormal':
node = new Nodes.BumpMapNode( inputs.in, inputs.scale );
node.toNormalMap = true;
break;
}
//
if ( ! node ) {
console.info( nodeDef ); // TODO: Clean up.
throw new Error( `THREE.MaterialXLoader: Unexpected node graph element, "${ nodeDef.nodeName }".` );
}
node.name = nodeDef.getAttribute( 'name' );
//
this.nodeCache.set( nodeDef, node );
return node;
}
parseInputs( nodeDef, nodeGraphName ) {
const inputs = {};
for ( const inputDef of nodeDef.children ) {
const inputName = inputDef.getAttribute( 'name' );
inputs[ inputName ] = this.parseInput( inputDef, nodeGraphName );
}
return inputs;
}
parseInput( inputDef, nodeGraphName = '' ) {
//
const otherNodeGraphName = inputDef.getAttribute('nodegraph');
if ( otherNodeGraphName ) {
const sourceName = inputDef.getAttribute( 'output' );
const sourceDef = this.nodeGraphDefs[ otherNodeGraphName ].querySelector(`output[name=${sourceName}]`);
return this.parseNode( sourceDef, otherNodeGraphName );
}
//
const nodeName = inputDef.getAttribute('nodename');
if ( nodeName ) {
const sourceDef = this.nodeGraphDefs[ nodeGraphName ].querySelector(`[name=${nodeName}]`);
return this.parseNode( sourceDef, nodeGraphName );
}
//
const type = inputDef.getAttribute( 'type' );
const value = inputDef.getAttribute( 'value' );
return formatValue( type, value );
}
parseTexture( nodeDef, nodeGraphName, inputs ) {
this.beginResourceScope( nodeGraphName );
let texture;
this.pending.push( new Promise( ( resolve, reject ) => {
texture = this.textureLoader.load( inputs.file, resolve, undefined, reject );
texture.wrapS = texture.wrapT = RepeatWrapping;
texture.flipY = false;
} ) );
this.endResourceScope( nodeGraphName );
const textureNode = new Nodes.TextureNode( texture );
for ( const inputName in inputs ) {
const inputValue = inputs[ inputName ];
switch ( inputName ) {
case 'texcoord':
textureNode.uv = inputValue;
break;
case 'uaddressmode':
texture.wrapS = UV_ADDRESS_MODE[ inputValue ];
break;