mirror of
https://github.com/DanielnetoDotCom/YouPHPTube
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155 lines
3.1 KiB
JavaScript
155 lines
3.1 KiB
JavaScript
import { TempNode } from '../core/TempNode.js';
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import { PositionNode } from './PositionNode.js';
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import { NormalNode } from './NormalNode.js';
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function ReflectNode( scope ) {
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TempNode.call( this, 'v3' );
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this.scope = scope || ReflectNode.CUBE;
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}
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ReflectNode.CUBE = 'cube';
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ReflectNode.SPHERE = 'sphere';
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ReflectNode.VECTOR = 'vector';
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ReflectNode.prototype = Object.create( TempNode.prototype );
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ReflectNode.prototype.constructor = ReflectNode;
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ReflectNode.prototype.nodeType = 'Reflect';
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ReflectNode.prototype.getUnique = function ( builder ) {
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return ! builder.context.viewNormal;
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};
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ReflectNode.prototype.getType = function ( /* builder */ ) {
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switch ( this.scope ) {
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case ReflectNode.SPHERE:
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return 'v2';
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}
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return this.type;
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};
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ReflectNode.prototype.generate = function ( builder, output ) {
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var isUnique = this.getUnique( builder );
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if ( builder.isShader( 'fragment' ) ) {
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var result;
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switch ( this.scope ) {
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case ReflectNode.VECTOR:
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var viewNormalNode = new NormalNode( NormalNode.VIEW );
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var roughnessNode = builder.context.roughness;
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var viewNormal = viewNormalNode.build( builder, 'v3' );
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var viewPosition = new PositionNode( PositionNode.VIEW ).build( builder, 'v3' );
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var roughness = roughnessNode ? roughnessNode.build( builder, 'f' ) : undefined;
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var method = `reflect( -normalize( ${viewPosition} ), ${viewNormal} )`;
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if ( roughness ) {
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// Mixing the reflection with the normal is more accurate and keeps rough objects from gathering light from behind their tangent plane.
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method = `normalize( mix( ${method}, ${viewNormal}, ${roughness} * ${roughness} ) )`;
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}
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var code = `inverseTransformDirection( ${method}, viewMatrix )`;
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if ( isUnique ) {
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builder.addNodeCode( `vec3 reflectVec = ${code};` );
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result = 'reflectVec';
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} else {
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result = code;
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}
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break;
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case ReflectNode.CUBE:
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var reflectVec = new ReflectNode( ReflectNode.VECTOR ).build( builder, 'v3' );
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var code = 'vec3( -' + reflectVec + '.x, ' + reflectVec + '.yz )';
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if ( isUnique ) {
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builder.addNodeCode( `vec3 reflectCubeVec = ${code};` );
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result = 'reflectCubeVec';
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} else {
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result = code;
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}
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break;
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case ReflectNode.SPHERE:
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var reflectVec = new ReflectNode( ReflectNode.VECTOR ).build( builder, 'v3' );
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var code = 'normalize( ( viewMatrix * vec4( ' + reflectVec + ', 0.0 ) ).xyz + vec3( 0.0, 0.0, 1.0 ) ).xy * 0.5 + 0.5';
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if ( isUnique ) {
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builder.addNodeCode( `vec2 reflectSphereVec = ${code};` );
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result = 'reflectSphereVec';
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} else {
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result = code;
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}
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break;
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}
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return builder.format( result, this.getType( builder ), output );
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} else {
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console.warn( 'THREE.ReflectNode is not compatible with ' + builder.shader + ' shader.' );
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return builder.format( 'vec3( 0.0 )', this.type, output );
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}
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};
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ReflectNode.prototype.toJSON = function ( meta ) {
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var data = this.getJSONNode( meta );
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if ( ! data ) {
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data = this.createJSONNode( meta );
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data.scope = this.scope;
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}
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return data;
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};
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export { ReflectNode };
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