Still working on the implementation as this was just a small aspect. Still got a number of other problems to overcome before the code is stable.
On Aug 25, 6:52 pm, "[email protected]" <[email protected]> wrote: > On Aug 25, 8:51 am, sgiddings <[email protected]> wrote: > > > > > Hi Larry and Rossko, > > > Ok, I have the solution, which I will share with you. > > I cannot claim any credit as it was Chris Veness (of movable- > > type.co.uk fame) who supplied it. > > > Firstly to clarify the question - > > The two points are at the same radius from the centre point. > > The arc must extend from the first point and finish at the second > > point. > > The issue of clockwise or counter-clockwise is probably situation > > specific - for myself the direction is counter-clockwise. > > > Here is his solution as he stated it - > > * find bearing b1 from centre point to point A > > * find bearing b2 from centre point to point B > > * arc[] = point A // initial point in polyline array > > * for (brng = b1; brng <= b2; brng += incr) > > * { > > * p = new point dist r, bearing brng from centre point > > * arc[] = p // add this point to polyline array > > * } > > * draw(arc) > > > I was able to implement this pseudo code to my specific needs. > > Are you going to share your implementation with the group? > > -- Larry > > > Thanks for your help gentlemen. > > Simon > > On Aug 25, 2:38 pm, "[email protected]" <[email protected]> > > wrote: > > > > On Aug 25, 2:34 am, "[email protected]" <[email protected]> > > > wrote: > > > > > On Aug 25, 12:23 am, sgiddings <[email protected]> wrote: > > > > > > Hi Larry, > > > > > > In fact, it was your own page that you put in place to help me with > > > > > 'donuts' ! > > > > > >http://www.geocodezip.com/v3_polygon_example_donut.html > > > > > But I asked for "the map where you tried to adapt it and failed". > > > > > I'm sure I can do it, given time and motivation (it is just math). > > > > The problem as posed is both underspecified (not enough information) > > > and over specified (too much information). So you have to make some > > > decisions when you write your code. For this case you may know the > > > solution, but for a general purpose arc routine, you will need to > > > address them. > > > > 1. You have a radius, center point and two points on the circle. What > > > if they aren't consistent? Does the arc go through both points or > > > have the specified radius from the center? > > > > 2. There are 2 solutions: big arc and little arc. What determines > > > which way the arc is drawn, clockwise or counter-clockwise? > > > > -- Larry > > > > > > Simon > > > > > > On Aug 24, 8:35 pm, "[email protected]" <[email protected]> > > > > > wrote: > > > > > > > On Aug 24, 11:27 am, sgiddings <[email protected]> wrote: > > > > > > > > I need to draw an arc between two points on the map, which are > > > > > > > defined > > > > > > > by a third "centre" point, keeping the same radius. > > > > > > > > Point A is at (48.596190206866830 : -1.5551704322317228) > > > > > > > Point B is at (48.610335003092956 : -1.6123447775299600) > > > > > > > Centre point is at (48.565630000000006 : -1.6050300000000002) > > > > > > > The radius between the centre point and the outer points is 5 Km > > > > > > > > I tried to adapt the polyline circle example but have clearly not > > > > > > > understood what I should do. > > > > > > > > Can anyone help me with this ? > > > > > > > Probably. Where is the map where you tried to adapt it and failed? > > > > > > > -- Larry- Hide quoted text - > > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Google Maps JavaScript API v3" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-maps-js-api-v3?hl=en.
