@@ -1,25 +1,100 @@
 
+
+// requires matrix_vector_lib.js
+// TODO we could make some libraryless way of checking dependencies and versions.
+
 
 // global namespace object
 var WireframeModel;
 
 
 (function(){
+
+
 
 //  A wireframe model and all the controls needed to move the camera and draw.
 //  despite the name, it may also include polygon surfaces.
-
-var origin = [0, 0, 0];
-
-
-
-var points = []; //global
-var solo_points = {};
-var lines = [];
+function __WireframeModel(){
+
+	var WFMObj = this;
+	
+	var view_origin = [0, 0, 0];
+	var view_transform = [[1, 0, 0],
+	                      [0, 1, 0],
+						  [0, 0, 1]];
+
+
+
+	var points = []; //global
+	var solo_points = {};
+	var lines = [];
+	
+	
+	// just because these actual objects is returned
+	// doesn't mean you should modify it externally if you can help it.
+	
+	WFMObj.getPoints = function getPoints(){
+		return points; }
+	
+	WFMObj.getLines = function getLines(){
+		return lines; }
+	
+	WFMObj.getViewTransform = function getViewTransform(){
+		return view_transform; }
+	
+	
+	
+	WFMObj.addPoint = function addPoint(pt){
+		
+		//  Check type of passed object.
+		if(Array.isArray && !Array.isArray(pt)){  // only check if Array.isArray function is available
+			throw "pt object is not an array"; }
+			
+		if(pt.length != 3){
+			throw "pt array object not length 3"; }
+		
+		for(var i = 0; i < 3; ++i){
+			if(isNaN(pt[i])) throw "pt object array does not store a number at index " + i; }
+			
+		points.push(pt);
+		return points.length - 1; }
+	
+	
+	
+	WFMObj.addLine = function addLine(line){
+		if(Array.isArray && !Array.isArray(line)){
+			throw "line object is not an array" }
+		
+		if(line.length != 2){
+			throw "line object must be between 2 points.  line object has length: " + line.length; }
+		
+		for(var i = 0; i < 2; ++i){
+			var ptindex = line[i];
+			if(isNaN(ptindex) || Math.floor(ptindex) != ptindex){
+				throw "pt ref at index " + i + " of line was not an integer: " + ptindex; }
+			
+			if(ptindex < 0 || ptindex >= points.length){
+				throw "pt ref at index " + i + " of line was not in bounds: " + ptindex; }}
+		
+		lines.push(line);
+		return lines.length - 1; }
+				
+	
+}
+
+//  use constructor as global namespace object.
+WireframeModel = __WireframeModel;
+
+
+})();
+
+/*
 
 var point_projections = [];
+
+
 var line_midpoint_projections = [];
 
 
 var highlight_object = null;
 var mouse_dragging = false;
@@ -337,9 +412,7 @@
 	}
     
     ctx.fillStyle = "rgb(0,0,0)";
 	writeMsg(canvas, msg); }
 	
-	
+*/
 
-
-})();