GD with php

I am trying to use gd to make a wind direction compass.

Is is possbile to merge the picture of the compass with the picture of
the compass needle rotateing the needle as needed ofr each rendering?

timlitw@gmail.com wrote:
> I am trying to use gd to make a wind direction compass.
>
> Is is possbile to merge the picture of the compass with the picture of
> the compass needle rotateing the needle as needed ofr each rendering?
>

Yep, example source can be found here:

http://playground.jwscripts.com/imagerotate.phps

The source also contains URLs to a demo application.


JW

Janwillem Borleffs wrote:
> timlitw@gmail.com wrote:
> > I am trying to use gd to make a wind direction compass.
> >
> > Is is possbile to merge the picture of the compass with the picture of
> > the compass needle rotateing the needle as needed ofr each rendering?
> >
>
> Yep, example source can be found here:
>
> http://playground.jwscripts.com/imagerotate.phps
>
> The source also contains URLs to a demo application.
>
>
> JW

Thanks very much for that. I had found a clock and modified that - and
got this far
http://www.qffinc.com/scripts/compass.php?windir=300

but I think with a few modification this example will get me further.

timlitw@gmail.com wrote:
> Janwillem Borleffs wrote:
> > timlitw@gmail.com wrote:
> > > I am trying to use gd to make a wind direction compass.
> > >
> > > Is is possbile to merge the picture of the compass with the picture of
> > > the compass needle rotateing the needle as needed ofr each rendering?
> > >
> >
> > Yep, example source can be found here:
> >
> > http://playground.jwscripts.com/imagerotate.phps
> >
> > The source also contains URLs to a demo application.
> >
> >
> > JW
>
> Thanks very much for that. I had found a clock and modified that - and
> got this far
> http://www.qffinc.com/scripts/compass.php?windir=300
>
> but I think with a few modification this example will get me further.

It still needs some work - rotateing the pointer for nne ne and ene ofr
example leave artifacts. you can see it here
http://www.qffinc.com/weather/hillsboro/test.php

Message-ID: <1151819563.790025.269390@75g2000cwc.googlegroups. com> from
timlitw@gmail.com contained the following:

>It still needs some work - rotateing the pointer for nne ne and ene ofr
>example leave artifacts. you can see it here
>http://www.qffinc.com/weather/hillsboro/test.php


Give your server a break. Each time you generate and image, store it.
then check if the image exists before generating a new one. Eventually
you will have 360 images and won't need to create any more. Or just
write a loop to generate 360 images in one go.

Though to be honest, I doubt you can measure wind direction to an
accuracy of one degree anyway. A display to the nearest 5 degrees would
probably do just as well.
--
Geoff Berrow (put thecat out to email)
It's only Usenet, no one dies.
My opinions, not the committee's, mine.
Simple RFDs http://www.ckdog.co.uk/rfdmaker/

Geoff Berrow wrote:
> Message-ID: <1151819563.790025.269390@75g2000cwc.googlegroups. com> from
> timlitw@gmail.com contained the following:
>
> >It still needs some work - rotateing the pointer for nne ne and ene ofr
> >example leave artifacts. you can see it here
> >http://www.qffinc.com/weather/hillsboro/test.php
>
>
> Give your server a break. Each time you generate and image, store it.
> then check if the image exists before generating a new one. Eventually
> you will have 360 images and won't need to create any more. Or just
> write a loop to generate 360 images in one go.
>
> Though to be honest, I doubt you can measure wind direction to an
> accuracy of one degree anyway. A display to the nearest 5 degrees would
> probably do just as well.
> --
> Geoff Berrow (put thecat out to email)
> It's only Usenet, no one dies.
> My opinions, not the committee's, mine.
> Simple RFDs http://www.ckdog.co.uk/rfdmaker/


actually , n, nne, ne, ene, e, ese, se, sse, s ssw, sw, wsw, w wnw, nw,
nnw are all that are really needed. We don't actually have to be more
acurate than that.

So how do I check if I already have the image ot not?

Message-ID: <1151866129.908244.297340@p79g2000cwp.googlegroups .com> from
timlitw@gmail.com contained the following:

>actually , n, nne, ne, ene, e, ese, se, sse, s ssw, sw, wsw, w wnw, nw,
>nnw are all that are really needed. We don't actually have to be more
>acurate than that.
>
>So how do I check if I already have the image ot not?

file_exists()

But for just sixteen images, I'd simply create them in a paint program.

--
Geoff Berrow (put thecat out to email)
It's only Usenet, no one dies.
My opinions, not the committee's, mine.
Simple RFDs http://www.ckdog.co.uk/rfdmaker/

<comp.lang.php>
<timlitw@gmail.com>
<2 Jul 2006 11:48:49 -0700>
<1151866129.908244.297340@p79g2000cwp.googlegroups .com>

> actually , n, nne, ne, ene, e, ese, se, sse, s ssw, sw, wsw, w wnw, nw,
> nnw are all that are really needed. We don't actually have to be more
> acurate than that.
>
> So how do I check if I already have the image ot not?
>

$pass=1;
$filename="images/demo.jpg";
if (!file_exists($filename)) {$pass=0;}
if ($pass==0) {include('create_map_image.php');}

If a image isnt found then $pass will equal 0


--
www.emailuser.co.uk/?name=KRUSTOV

Krustov wrote:
>
> $pass=1;
> $filename="images/demo.jpg";
> if (!file_exists($filename)) {$pass=0;}
> if ($pass==0) {include('create_map_image.php');}
>
> If a image isnt found then $pass will equal 0


Thank you everyone for the help!

Now I need to add, high and low hands to my gauges.

When I duplicate the code the writes the hand it still doesn't get in
the final image.

I'm guessing that I need to increment the temporary image that I am
working with as I add layers.

Does any one have an example of adding 2 or 3 layers on top of an
image?