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/**
* @author sunag / http://www.sunag.com.br/
*/
import { TempNode } from '../core/TempNode.js';
function ReflectNode( scope ) {
TempNode.call( this, 'v3', { unique: true } );
this.scope = scope || ReflectNode.CUBE;
}
ReflectNode.CUBE = 'cube';
ReflectNode.SPHERE = 'sphere';
ReflectNode.VECTOR = 'vector';
ReflectNode.prototype = Object.create( TempNode.prototype );
ReflectNode.prototype.constructor = ReflectNode;
ReflectNode.prototype.nodeType = "Reflect";
ReflectNode.prototype.getType = function ( builder ) {
switch ( this.scope ) {
case ReflectNode.SPHERE:
return 'v2';
}
return this.type;
};
ReflectNode.prototype.generate = function ( builder, output ) {
if ( builder.isShader( 'fragment' ) ) {
var result;
switch ( this.scope ) {
case ReflectNode.VECTOR:
builder.addNodeCode( 'vec3 reflectVec = inverseTransformDirection( reflect( -normalize( vViewPosition ), normal ), viewMatrix );' );
result = 'reflectVec';
break;
case ReflectNode.CUBE:
var reflectVec = new ReflectNode( ReflectNode.VECTOR ).build( builder, 'v3' );
builder.addNodeCode( 'vec3 reflectCubeVec = vec3( -1.0 * ' + reflectVec + '.x, ' + reflectVec + '.yz );' );
result = 'reflectCubeVec';
break;
case ReflectNode.SPHERE:
var reflectVec = new ReflectNode( ReflectNode.VECTOR ).build( builder, 'v3' );
builder.addNodeCode( 'vec2 reflectSphereVec = normalize( ( viewMatrix * vec4( ' + reflectVec + ', 0.0 ) ).xyz + vec3( 0.0, 0.0, 1.0 ) ).xy * 0.5 + 0.5;' );
result = 'reflectSphereVec';
break;
}
return builder.format( result, this.getType( builder ), output );
} else {
console.warn( "THREE.ReflectNode is not compatible with " + builder.shader + " shader." );
return builder.format( 'vec3( 0.0 )', this.type, output );
}
};
ReflectNode.prototype.toJSON = function ( meta ) {
var data = this.getJSONNode( meta );
if ( ! data ) {
data = this.createJSONNode( meta );
data.scope = this.scope;
}
return data;
};
export { ReflectNode };
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