Spaces:
Running
Running
File size: 2,617 Bytes
6cd9596 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 |
/**
* @author sunag / http://www.sunag.com.br/
*/
import { TempNode } from '../core/TempNode.js';
import { FunctionNode } from '../core/FunctionNode.js';
import { MaxMIPLevelNode } from '../utils/MaxMIPLevelNode.js';
import { BlinnShininessExponentNode } from './BlinnShininessExponentNode.js';
function RoughnessToBlinnExponentNode( texture ) {
TempNode.call( this, 'f' );
this.texture = texture;
this.maxMIPLevel = new MaxMIPLevelNode( texture );
this.blinnShininessExponent = new BlinnShininessExponentNode();
}
RoughnessToBlinnExponentNode.Nodes = ( function () {
var getSpecularMIPLevel = new FunctionNode( [
// taken from here: http://casual-effects.blogspot.ca/2011/08/plausible-environment-lighting-in-two.html
"float getSpecularMIPLevel( const in float blinnShininessExponent, const in float maxMIPLevelScalar ) {",
// float envMapWidth = pow( 2.0, maxMIPLevelScalar );
// float desiredMIPLevel = log2( envMapWidth * sqrt( 3.0 ) ) - 0.5 * log2( pow2( blinnShininessExponent ) + 1.0 );
" float desiredMIPLevel = maxMIPLevelScalar + 0.79248 - 0.5 * log2( pow2( blinnShininessExponent ) + 1.0 );",
// clamp to allowable LOD ranges.
" return clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );",
"}"
].join( "\n" ) );
return {
getSpecularMIPLevel: getSpecularMIPLevel
};
} )();
RoughnessToBlinnExponentNode.prototype = Object.create( TempNode.prototype );
RoughnessToBlinnExponentNode.prototype.constructor = RoughnessToBlinnExponentNode;
RoughnessToBlinnExponentNode.prototype.nodeType = "RoughnessToBlinnExponent";
RoughnessToBlinnExponentNode.prototype.generate = function ( builder, output ) {
if ( builder.isShader( 'fragment' ) ) {
this.maxMIPLevel.texture = this.texture;
var getSpecularMIPLevel = builder.include( RoughnessToBlinnExponentNode.Nodes.getSpecularMIPLevel );
return builder.format( getSpecularMIPLevel + '( ' + this.blinnShininessExponent.build( builder, 'f' ) + ', ' + this.maxMIPLevel.build( builder, 'f' ) + ' )', this.type, output );
} else {
console.warn( "THREE.RoughnessToBlinnExponentNode is not compatible with " + builder.shader + " shader." );
return builder.format( '0.0', this.type, output );
}
};
RoughnessToBlinnExponentNode.prototype.copy = function ( source ) {
TempNode.prototype.copy.call( this, source );
this.texture = source.texture;
};
RoughnessToBlinnExponentNode.prototype.toJSON = function ( meta ) {
var data = this.getJSONNode( meta );
if ( ! data ) {
data = this.createJSONNode( meta );
data.texture = this.texture;
}
return data;
};
export { RoughnessToBlinnExponentNode };
|