thanks, Andrews. let me see if I understand...
> Your startAnimation function reads through a line called "poly" (if
> I've understood it right).
this is the poly = new GPolyline(pts,'#FF0000',0,0); at the end of the
xml, I guess
>
> Change that to polys[lineNumber] so that it uses one of the lines you
> have in the array, assuming you called it "polys" as suggested.
ok - so I changed it to gpolys[poly_num] = new GPolyline(pts,'#FF0000',
0,0);
because I have the lines:
gpolys.push(poly);
var poly_num = gpolys.length - 1;
which get the line number from the array.
It may be referenced in several places.
It is - and I'm assuming that all the code like:
var p0 = poly.getVertex(0);
needs to be changed to
var p0 = gpolys[poly_num].getVertex(0);
> Change the function definition to include that lineNumber --
> function startAnimation(lineNumber) {
I'm thinking that the line number gets passed to the function
definition like this:
function startAnimation(poly_num)
>
> Change where that is called to include the number of the line you want
> to follow, like startAnimation(0) or startAnimation(1). You'll
> probably use a variable there --
> var lineToFollow = 0; // assigned however you do this
> startAnimation(lineToFollow);
and the function that calls the startAnimation function calls it like
this:
function toggleRun(poly_num){
var btn = document.getElementById(poly_num);
if (document.getElementById(poly_num).onclick) {
if (run,poly_num){
run=false;
startAnimation(poly_num);
}
}
}
so I guess I'm ok there, too
> Then when you call the animation on line 2 (say), 2 gets passed into
> the function which then follows polys[2].
should do. but there are a couple of snags. This line, from the old
code:
gpolys.push(poly);
doesn't push onto anything, now that "poly" doesn't exist... but doing
gpolys.push(gpolys[poly_num]); is of course just weird and wrong and
doing gpolys.push(line); gets me a "line is undefined" error.
and when I try it all out without changing the push line), there's a
"Cannot read property 'xa' of undefined" error...
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