Hi.I created a little python plug in for dia that will export the drawn
behavior tree in a json format...Note that this is created for game ai. But in
the end you get a powerful json file. So you may wand to use it for some thing
else
here it is
#START
import sys, dia
class BTJSON : def __init__ (self) : pass def begin_render (self,
data, filename) : self.f = open(filename, "w")
self.f.write ('{') o = data.layers[0].objects[0]
self.f.write(o.properties['text'].value.text.replace("\n", " "))
self.write_children(o) self.f.write ('}') def end_render (self) :
self.f.close() def write_children (self, o) :
children = [] left = [] have_children = 0
got_children = 0 children_count = 0
connections_count = 0 for c in o.connections :
if (len(c.connected) < 1) : continue
for co in c.connected : if
(co.handles[0].connected_to.object == o) :
children_count += 1 left.append
(co.handles[1].connected_to.object.bounding_box.left)
children.append(co.handles[1].connected_to.object.bounding_box.left)
left.sort() for c in o.connections :
if (len (c.connected) < 1) : continue
for co in c.connected : if
(co.handles[0].connected_to.object == o) :
for i in range(len(left)) : if
(left[i] == co.handles[1].connected_to.object.bounding_box.left) :
children[i] =
co.handles[1].connected_to.object
if (len (children) > 0) :
self.f.write (',children: [')
for i in range (len(children)) : self.f.write ('{')
self.f.write(children[i].properties['text'].value.text.replace("\n", " "))
self.write_children (children[i]) if (i <
len(children)-1) : self.f.write ('},')
else : self.f.write ('}]')
return children# dia-python keeps a reference to the renderer class and uses it
on demanddia.register_export ("Behaviour Tree Json", "json", BTJSON())
#END
I hope that spaces will remain in the email format....AnywayIt export some
thing like this :
{type: 'Selector',children: [{type: 'Limit',duration: 10,children: [{type:
'MoveTo',position: [0.0,0.0]}]},{type: 'Parallel',children: [{type:
'Wait',duration: 15,children: [{type: 'Fatality',gore: true}]},{type:
'Action1'},{type: 'action2'}]},{type: 'Action',duration: 5}]}
This was exported from a simple diagram that looks like a behavior tree. As you
can see from the source the script starts from the first object of the first
layer and solves in a way the tree.It writes the text of the rectangle and
checks for children and creates an array with the childrens.childrens are other
connected rectangles with text. Then childrens will write their text and will
check for childrens and ...
So you write the text-code that you want in you json in the rectangle I will
present the rectangles like this /-------// //------/
I write what I wand in the rectangle like this
/----------------------/ / type: 'Wait', / /
duration: 10 / /----------------------/
I use type to identify the Task. But in general you can write anythingthen I
pass all the properties I wand in a json style.So a Behavior tree will look
like this. /--------------------/
/ type: 'Selector', / /-------------------/
| | /---------------/
/-----------------/ / type: 'Limit' / / type: 'Reload' /
/ duration: 5 / /----------------/
/---------------/ |
/---------------------/ / type: 'Shoot', /
/-------------------/
And you will get this :{type: 'Selector',children: [{type: 'Limit',duration:
5,children: [{type: 'Shoot'}]},{type: 'Reload'}]}
Limitations: I haven't tested very much but the limitations are.1. It will
start from the first object of the first layer. So Don't ever delete the first
object just change the text to suits your needs.2. You can only export vertical
trees. Like the example. Because the script checks the left bounding box edge
of the rectangles to set the children order.
That's all. It is just a script that I created to use, and I don't mind to
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