From: Scott Worley Date: Wed, 2 Jan 2013 07:44:02 +0000 (-0800) Subject: Break out parts of go() into separate functions X-Git-Url: http://git.scottworley.com/nt3d/commitdiff_plain/1378fd96ec4fe514d15de29575040bd78b896f2f Break out parts of go() into separate functions These things are useful separately, even to the point of including nt3d.js into random other webpages via the javascript console as a toolkit to manipulate and export stuff elsewhere on the web. --- diff --git a/nt3d.js b/nt3d.js index 7e0fa25..bc11c71 100644 --- a/nt3d.js +++ b/nt3d.js @@ -347,41 +347,20 @@ nt3d = { this.point_equal(b, c, this.degenerate_face_epsilon) || this.point_equal(c, a, this.degenerate_face_epsilon); }, - go: function() { - // Remove any previous download links - var old_download_link = document.getElementById("nt3d_download"); - if (old_download_link) { - old_download_link.parentNode.removeChild(old_download_link); - } - - // Continue in a callback, so that there's not a stale download - // link hanging around while we process. - setTimeout(function(the_this) { (function() { - - // Get params from form - var params = []; - for (var i = 0; i < this.user_params.length; i++) { - var as_string = this.form.elements["param"+i].value; - var as_num = +as_string; - params[i] = isNaN(as_num) ? as_string : as_num; - } - - // Run user_function - this.points = this.user_function.apply(null, params); - + validate: function(points) { // Do a little validation - if (this.points.length % 3 != 0) { + if (points.length % 3 != 0) { alert("Points list length not divisble by 3!"); } var nan_count = 0; var nan_point_count = 0; var nan_face_count = 0; - for (var i = 0; i < this.points.length/3; i++) { + for (var i = 0; i < points.length/3; i++) { var nan_in_face = false; for (var j = 0; j < 3; j++) { var nan_in_point = false; for (var k = 0; k < 3; k++) { - if (isNaN(this.points[i*3+j][k])) { + if (isNaN(points[i*3+j][k])) { nan_count++; nan_in_point = true; nan_in_face = true; @@ -392,16 +371,17 @@ nt3d = { if (nan_in_face) nan_face_count ++; } if (nan_count != 0) { - alert(nan_count + " NaNs in " + nan_point_count + " points in " + nan_face_count + " faces (" + (100 * nan_face_count / (this.points.length/3)) + "% of faces)."); + alert(nan_count + " NaNs in " + nan_point_count + " points in " + nan_face_count + " faces (" + (100 * nan_face_count / (points.length/3)) + "% of faces)."); } - - // Remove degenerate faces + }, + remove_degenerate_faces: function(points) { + // Note: This modifies points var degenerate_face_count = 0; - for (var i = 0; i < this.points.length/3; i++) { - if (this.is_degenerate(this.points[i*3+0], - this.points[i*3+1], - this.points[i*3+2])) { - this.points.splice(i*3, 3); + for (var i = 0; i < points.length/3; i++) { + if (this.is_degenerate(points[i*3+0], + points[i*3+1], + points[i*3+2])) { + points.splice(i*3, 3); i--; degenerate_face_count ++; } @@ -409,15 +389,16 @@ nt3d = { if (degenerate_face_count != 0) { console.log("Removed " + degenerate_face_count + " degenerate faces"); } - - // Make STL - this.stl = "solid " + this.user_function.name + "\n"; - for (var i = 0; i < this.points.length/3; i++) { - var a = this.points[i*3+0]; - var b = this.points[i*3+1]; - var c = this.points[i*3+2]; + return points; + }, + to_stl: function(points, name) { + var stl = "solid " + name + "\n"; + for (var i = 0; i < points.length/3; i++) { + var a = points[i*3+0]; + var b = points[i*3+1]; + var c = points[i*3+2]; var normal = this.normal(a, b, c); - this.stl += "facet normal " + normal[0] + " " + normal[1] + " " + normal[2] + "\n" + + stl += "facet normal " + normal[0] + " " + normal[1] + " " + normal[2] + "\n" + "outer loop\n" + "vertex " + a[0] + " " + a[1] + " " + a[2] + "\n"+ "vertex " + b[0] + " " + b[1] + " " + b[2] + "\n"+ @@ -425,8 +406,35 @@ nt3d = { "endloop\n" + "endfacet\n"; } - this.stl += "endsolid " + this.user_function.name + "\n"; + stl += "endsolid " + name + "\n"; + return stl; + }, + go: function() { + // Remove any previous download links + var old_download_link = document.getElementById("nt3d_download"); + if (old_download_link) { + old_download_link.parentNode.removeChild(old_download_link); + } + + // Continue in a callback, so that there's not a stale download + // link hanging around while we process. + setTimeout(function(the_this) { (function() { + + // Get params from form + var params = []; + for (var i = 0; i < this.user_params.length; i++) { + var as_string = this.form.elements["param"+i].value; + var as_num = +as_string; + params[i] = isNaN(as_num) ? as_string : as_num; + } + + this.points = this.user_function.apply(null, params); + + this.validate(this.points); + + this.remove_degenerate_faces(this.points); + this.stl = this.to_stl(this.points, this.user_function.name); // Offer result as download var download_link = document.createElement("a");