webvr js meetup initial commit

node_modules/three/examples/js/nodes/math/Math3Node.js

@@ -0,0 +1,74 @@
+/**
+ * @author sunag / http://www.sunag.com.br/
+ */
+
+THREE.Math3Node = function( a, b, c, method ) {
+
+	THREE.TempNode.call( this );
+
+	this.a = a;
+	this.b = b;
+	this.c = c;
+
+	this.method = method || THREE.Math3Node.MIX;
+
+};
+
+THREE.Math3Node.MIX = 'mix';
+THREE.Math3Node.REFRACT = 'refract';
+THREE.Math3Node.SMOOTHSTEP = 'smoothstep';
+THREE.Math3Node.FACEFORWARD = 'faceforward';
+
+THREE.Math3Node.prototype = Object.create( THREE.TempNode.prototype );
+THREE.Math3Node.prototype.constructor = THREE.Math3Node;
+
+THREE.Math3Node.prototype.getType = function( builder ) {
+
+	var a = builder.getFormatLength( this.a.getType( builder ) );
+	var b = builder.getFormatLength( this.b.getType( builder ) );
+	var c = builder.getFormatLength( this.c.getType( builder ) );
+
+	if ( a > b && a > c ) return this.a.getType( builder );
+	else if ( b > c ) return this.b.getType( builder );
+
+	return this.c.getType( builder );
+
+};
+
+THREE.Math3Node.prototype.generate = function( builder, output ) {
+
+	var material = builder.material;
+
+	var type = this.getType( builder );
+
+	var a, b, c,
+		al = builder.getFormatLength( this.a.getType( builder ) ),
+		bl = builder.getFormatLength( this.b.getType( builder ) ),
+		cl = builder.getFormatLength( this.c.getType( builder ) );
+
+	// optimzer
+
+	switch ( this.method ) {
+		case THREE.Math3Node.REFRACT:
+			a = this.a.build( builder, type );
+			b = this.b.build( builder, type );
+			c = this.c.build( builder, 'fv1' );
+			break;
+
+		case THREE.Math3Node.MIX:
+			a = this.a.build( builder, type );
+			b = this.b.build( builder, type );
+			c = this.c.build( builder, cl == 1 ? 'fv1' : type );
+			break;
+
+		default:
+			a = this.a.build( builder, type );
+			b = this.b.build( builder, type );
+			c = this.c.build( builder, type );
+			break;
+
+	}
+
+	return builder.format( this.method + '(' + a + ',' + b + ',' + c + ')', type, output );
+
+};