X-Git-Url: http://git.scottworley.com/nt3d/blobdiff_plain/4eea5cbf56ef47679df35e618980cf5596facba6..a4cc880243177697bfa0a1e9091bfd12a60366ab:/nt3d.js

diff --git a/nt3d.js b/nt3d.js
index f22d676..ae17af1 100644
--- a/nt3d.js
+++ b/nt3d.js
@@ -23,6 +23,26 @@ nt3d = {
 		return this.triangle(a, b, c).concat(
 		       this.triangle(c, d, a));
 	},
+	trianglefan: function(fan) {
+		var result = [];
+		for (var i = 2; i < fan.length; i++) {
+			result.push(fan[0], fan[i-1], fan[i]);
+		}
+		return result;
+	},
+	quadstrip: function(strip) {
+		if (strip.length % 2 != 0) {
+			alert("quadstrip length not divisble by 2!");
+		}
+		var result = [];
+		for (var i = 2; i < strip.length; i += 2) {
+			result = result.concat(nt3d.quad(strip[i-2], strip[i-1], strip[i+1], strip[i]));
+		}
+		return result;
+	},
+	closed_quadstrip: function(strip) {
+		return nt3d.quadstrip(strip.concat([strip[0], strip[1]]));
+	},
 	sub: function(a, b) {
 		return [a[0] - b[0],
 		        a[1] - b[1],
@@ -95,6 +115,7 @@ nt3d = {
 			document.body.appendChild(this.ui);
 		}
 		this.form = document.createElement("form");
+		this.form.setAttribute("onsubmit", "nt3d.go(); return false");
 		this.ui.appendChild(this.form);
 		var table = document.createElement("table");
 		this.form.appendChild(table);