On 09/03/2015 08:11 AM, jamal crawford wrote:

oh nice :) im looking forward to this

Here's a rudimentary screencast:
http://pdblog.nfshost.com/fielddemo.webm

I start with a little abstraction named "b.pd". It just polls an [osc~] which is scaled and offset by some amount to compute
a value for the [field radius]. In a toplevel patch, setting the [field] does nothing.

However, when I create the struct with the "canvas a b" definition, it tells Pd to load up the contents of "b.pd" into memory. And when I create the scalar "foo", I also get a canvas "b.pd" associated with that scalar.

Now when I set the [field radius] in that abstraction, it updates the "radius" field for that scalar. The "radius" field also happens to be used as a parameter to [draw circle]. That means when the "radius" changes it animates the circle's radius.

As I make copies of the scalar you can see why this interface is so powerful-- each scalar has its own [osc~] controlling the animation at a frequency independent of the others. You can also get each one to [throw~] a signal to a bus for sound, but I didn't do audio with this screencast.

None of this is particularly efficient. But conceptually it's much easier to deal with than juggling gpointers. Also, once you start sending a lot of animation data to the gui, sys_queugui filters out redundant messages.

-Jonathan

cheers

On Wed, Sep 2, 2015, at 10:20 PM, Jonathan Wilkes wrote:
Sorry, I didn't clarify that these are brand new changes I made in my port of the GUI away from tcl/tk to nw.js. I developed them as a diversion from the otherwise mind-numbing task of measuring fonts, fixing scrollbars, etc.

I'll try to post a screencast later.

-Jonathan
On Wednesday, September 2, 2015 2:29 PM, jamal crawford <threen52@ml1.net> wrote:
hey list, Jonathan.

You start with a struct:[struct foo float x float y canvas a b]

Then create a scalar from this struct.

The scalar will have an "x" value, a "y" value, and a canvas "a" which gets filled with the contents of an abstraction "b.pd" that is somewhere in Pd's search path.

Now here's the neat thing-- inside the newly instantiated "b.pd" you can do this:

[loadbang]|[field x]|[print x]
imagine you have a drawing instruction like this:[draw rect 0 0 20 20]
When you create the scalar you get a little black box on a canvas.
With a canvas field like I described, you can right-click the scalar and choose "Open" to show a canvas window.
while trying to create [struct foo float x float y canvas a b], i get: canvas: no such type, using pd 0.46.6

what am I missing?

~/.jc