webvr js meetup initial commit

node_modules/three/examples/js/nodes/math/Math2Node.js

@@ -0,0 +1,96 @@
+/**
+ * @author sunag / http://www.sunag.com.br/
+ */
+
+THREE.Math2Node = function( a, b, method ) {
+
+	THREE.TempNode.call( this );
+
+	this.a = a;
+	this.b = b;
+
+	this.method = method || THREE.Math2Node.DISTANCE;
+
+};
+
+THREE.Math2Node.MIN = 'min';
+THREE.Math2Node.MAX = 'max';
+THREE.Math2Node.MOD = 'mod';
+THREE.Math2Node.STEP = 'step';
+THREE.Math2Node.REFLECT = 'reflect';
+THREE.Math2Node.DISTANCE = 'distance';
+THREE.Math2Node.DOT = 'dot';
+THREE.Math2Node.CROSS = 'cross';
+THREE.Math2Node.POW = 'pow';
+
+THREE.Math2Node.prototype = Object.create( THREE.TempNode.prototype );
+THREE.Math2Node.prototype.constructor = THREE.Math2Node;
+
+THREE.Math2Node.prototype.getInputType = function( builder ) {
+
+	// use the greater length vector
+	if ( builder.getFormatLength( this.b.getType( builder ) ) > builder.getFormatLength( this.a.getType( builder ) ) ) {
+
+		return this.b.getType( builder );
+
+	}
+
+	return this.a.getType( builder );
+
+};
+
+THREE.Math2Node.prototype.getType = function( builder ) {
+
+	switch ( this.method ) {
+		case THREE.Math2Node.DISTANCE:
+		case THREE.Math2Node.DOT:
+			return 'fv1';
+
+		case THREE.Math2Node.CROSS:
+			return 'v3';
+	}
+
+	return this.getInputType( builder );
+
+};
+
+THREE.Math2Node.prototype.generate = function( builder, output ) {
+
+	var material = builder.material;
+
+	var type = this.getInputType( builder );
+
+	var a, b,
+		al = builder.getFormatLength( this.a.getType( builder ) ),
+		bl = builder.getFormatLength( this.b.getType( builder ) );
+
+	// optimzer
+
+	switch ( this.method ) {
+		case THREE.Math2Node.CROSS:
+			a = this.a.build( builder, 'v3' );
+			b = this.b.build( builder, 'v3' );
+			break;
+
+		case THREE.Math2Node.STEP:
+			a = this.a.build( builder, al == 1 ? 'fv1' : type );
+			b = this.b.build( builder, type );
+			break;
+
+		case THREE.Math2Node.MIN:
+		case THREE.Math2Node.MAX:
+		case THREE.Math2Node.MOD:
+			a = this.a.build( builder, type );
+			b = this.b.build( builder, bl == 1 ? 'fv1' : type );
+			break;
+
+		default:
+			a = this.a.build( builder, type );
+			b = this.b.build( builder, type );
+			break;
+
+	}
+
+	return builder.format( this.method + '(' + a + ',' + b + ')', this.getType( builder ), output );
+
+};