three 基础库
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import { TempNode } from '../core/TempNode.js';
class MathNode extends TempNode {
constructor( a, bOrMethod, cOrMethod, method ) {
super();
this.a = a;
typeof bOrMethod !== 'string' ? this.b = bOrMethod : method = bOrMethod;
typeof cOrMethod !== 'string' ? this.c = cOrMethod : method = cOrMethod;
this.method = method;
}
getNumInputs( /*builder*/ ) {
switch ( this.method ) {
case MathNode.MIX:
case MathNode.CLAMP:
case MathNode.REFRACT:
case MathNode.SMOOTHSTEP:
case MathNode.FACEFORWARD:
return 3;
case MathNode.MIN:
case MathNode.MAX:
case MathNode.MOD:
case MathNode.STEP:
case MathNode.REFLECT:
case MathNode.DISTANCE:
case MathNode.DOT:
case MathNode.CROSS:
case MathNode.POW:
return 2;
default:
return 1;
}
}
getInputType( builder ) {
const a = builder.getTypeLength( this.a.getType( builder ) );
const b = this.b ? builder.getTypeLength( this.b.getType( builder ) ) : 0;
const c = this.c ? builder.getTypeLength( this.c.getType( builder ) ) : 0;
if ( a > b && a > c ) {
return this.a.getType( builder );
} else if ( b > c ) {
return this.b.getType( builder );
}
return this.c.getType( builder );
}
getType( builder ) {
switch ( this.method ) {
case MathNode.LENGTH:
case MathNode.DISTANCE:
case MathNode.DOT:
return 'f';
case MathNode.CROSS:
return 'v3';
}
return this.getInputType( builder );
}
generate( builder, output ) {
let a, b, c;
const al = this.a ? builder.getTypeLength( this.a.getType( builder ) ) : 0,
bl = this.b ? builder.getTypeLength( this.b.getType( builder ) ) : 0,
cl = this.c ? builder.getTypeLength( this.c.getType( builder ) ) : 0,
inputType = this.getInputType( builder ),
nodeType = this.getType( builder );
switch ( this.method ) {
// 1 input
case MathNode.NEGATE:
return builder.format( '( -' + this.a.build( builder, inputType ) + ' )', inputType, output );
case MathNode.INVERT:
return builder.format( '( 1.0 - ' + this.a.build( builder, inputType ) + ' )', inputType, output );
// 2 inputs
case MathNode.CROSS:
a = this.a.build( builder, 'v3' );
b = this.b.build( builder, 'v3' );
break;
case MathNode.STEP:
a = this.a.build( builder, al === 1 ? 'f' : inputType );
b = this.b.build( builder, inputType );
break;
case MathNode.MIN:
case MathNode.MAX:
case MathNode.MOD:
a = this.a.build( builder, inputType );
b = this.b.build( builder, bl === 1 ? 'f' : inputType );
break;
// 3 inputs
case MathNode.REFRACT:
a = this.a.build( builder, inputType );
b = this.b.build( builder, inputType );
c = this.c.build( builder, 'f' );
break;
case MathNode.MIX:
a = this.a.build( builder, inputType );
b = this.b.build( builder, inputType );
c = this.c.build( builder, cl === 1 ? 'f' : inputType );
break;
// default
default:
a = this.a.build( builder, inputType );
if ( this.b ) b = this.b.build( builder, inputType );
if ( this.c ) c = this.c.build( builder, inputType );
break;
}
// build function call
const params = [];
params.push( a );
if ( b ) params.push( b );
if ( c ) params.push( c );
const numInputs = this.getNumInputs( builder );
if ( params.length !== numInputs ) {
throw Error( `Arguments not match used in "${this.method}". Require ${numInputs}, currently ${params.length}.` );
}
return builder.format( this.method + '( ' + params.join( ', ' ) + ' )', nodeType, output );
}
copy( source ) {
super.copy( source );
this.a = source.a;
this.b = source.b;
this.c = source.c;
this.method = source.method;
return this;
}
toJSON( meta ) {
let data = this.getJSONNode( meta );
if ( ! data ) {
data = this.createJSONNode( meta );
data.a = this.a.toJSON( meta ).uuid;
if ( this.b ) data.b = this.b.toJSON( meta ).uuid;
if ( this.c ) data.c = this.c.toJSON( meta ).uuid;
data.method = this.method;
}
return data;
}
}
// 1 input
MathNode.RAD = 'radians';
MathNode.DEG = 'degrees';
MathNode.EXP = 'exp';
MathNode.EXP2 = 'exp2';
MathNode.LOG = 'log';
MathNode.LOG2 = 'log2';
MathNode.SQRT = 'sqrt';
MathNode.INV_SQRT = 'inversesqrt';
MathNode.FLOOR = 'floor';
MathNode.CEIL = 'ceil';
MathNode.NORMALIZE = 'normalize';
MathNode.FRACT = 'fract';
MathNode.SATURATE = 'saturate';
MathNode.SIN = 'sin';
MathNode.COS = 'cos';
MathNode.TAN = 'tan';
MathNode.ASIN = 'asin';
MathNode.ACOS = 'acos';
MathNode.ARCTAN = 'atan';
MathNode.ABS = 'abs';
MathNode.SIGN = 'sign';
MathNode.LENGTH = 'length';
MathNode.NEGATE = 'negate';
MathNode.INVERT = 'invert';
// 2 inputs
MathNode.MIN = 'min';
MathNode.MAX = 'max';
MathNode.MOD = 'mod';
MathNode.STEP = 'step';
MathNode.REFLECT = 'reflect';
MathNode.DISTANCE = 'distance';
MathNode.DOT = 'dot';
MathNode.CROSS = 'cross';
MathNode.POW = 'pow';
// 3 inputs
MathNode.MIX = 'mix';
MathNode.CLAMP = 'clamp';
MathNode.REFRACT = 'refract';
MathNode.SMOOTHSTEP = 'smoothstep';
MathNode.FACEFORWARD = 'faceforward';
MathNode.prototype.nodeType = 'Math';
MathNode.prototype.hashProperties = [ 'method' ];
export { MathNode };