edit docs

Author: peteroupc

glutil-eval.js

@@ -450,9 +450,10 @@ CurveEval.prototype.evalCurve=function(mesh,mode,n,u1,u2){
 /**
 * An evaluator of parametric functions for generating
 * vertex positions, normals, colors, and texture coordinates
-* of a surface.
+* of a surface.<p>
+* See the {@tutorial surfaces} tutorial for more information.
 * @class
-* @alias SurfaceEval
+* @alias glutil.SurfaceEval
 */
 this.SurfaceEval=function(){
  this.colorSurface=null;

tutorials/overview.md

@@ -1,6 +1,6 @@
 ## How to Use
 
-1. **Download the HTML 3D library**.
+1. [**Download the HTML 3D library**](https://github.com/peteroupc/html3dutil/releases).
 2. Extract the file <i>"glutil_min.js"</i>, and write the following code in every HTML page where you will use the library.
 
         <script type="text/javascript" src="glutil_min.js"></script>

tutorials/surfaces.md

@@ -11,7 +11,7 @@ A _parametric surface_ is a surface generated by evaluating the results of a _ve
 takes two numbers, U and V, and returns a 3D point, X, Y, and Z.  Each (U, V) point corresponds to an (X, Y, Z)
 point that lies on the surface.
 
-A _vector function_ in 3D is a combination of three functions, one for each axis:
+A _vector function_ in 3D is a combination of three functions, one for each dimension:
 
 * **F**(u, v) = [ _x_(u, v), _y_(u, v), _z_(u, v) ];