This excellent application www.maplesoft.com/applications/view.aspx?SID=5523&view

demonstrates the paths of light rays against various surfaces.  Can the initialization code be made more efficient and faster?  The only thing I could think of was to remove the call to plottools and replace it with just plot and adding an extra...

Okay a bit difficult to explain, hope you understand. In std. GUI Opening a Maple worksheet with document blocks that have autoexecute code, and are collapsed do not appear in the markers view if the worksheet is not allowed to autoexecute. Autoexecuting the worksheet will allow the document blocks to be visible for expanding.

I converted the package,module to a worksheet then executed the example before realizing it all executes at once. 

MyPackage := module()
        export  f1, f2;
        local   loc1;
        option package;
        f1 := proc() loc1 end proc;
        f2 := proc( v ...

Why won't isolve show all the solutions here?

> a := 6*x+2*y >= 48:
> b := 6*x+2*y <= 60:
>
> with(plots):
> aa := implicitplot(a, x = 0 .. 10, y = 0 .. 5, filledregions = true, transparency = .5):
> bb := implicitplot(b, x = 0 .. 10, y = 0 .. 5, filledregions = true, transparency = .5):

display(aa,bb)

We can see the region of solutions.  But if we use isolve ...

How do I add constants in a new package under an existing one?

For example, I want to add a new package named Astronomy under the Scientific constants package that contains more solar system data ie M[Jupiter], M[Saturn] etc...  or is it better to create the new package by itself?  How?