[x3d-public] X3DPSAIL x3d.py package updated and deployed to x3d.py, adding initial support for JSON export

[John Carlson]

With some flimflamming around, I was able to clear up some of my 
previous stacktraces.  Now I'm stuck in JSON export, may switch to XML 
export:


Traceback (most recent call last):

  File "/c/x3d-code/www.web3d.org/x3d/content/examples/x3dinput.py", 
line 148, in <module>
    print(scene.JSON(indentLevel=0, syntax="JSON"))
  File "/c/x3d-code/www.web3d.org/x3d/content/examples/x3d.py", line 
12792, in JSON
    result += str(self.Scene.JSON(indentLevel=indentLevel+1, 
syntax=syntax))
  File "/c/x3d-code/www.web3d.org/x3d/content/examples/x3d.py", line 
12303, in JSON
    result += each.JSON(indentLevel=indentLevel+1, syntax=syntax)

TypeError: JSON() got an unexpected keyword argument 'indentLevel'


A similar error appeared in several places, and I got rid of the 
arguments, plus I removed the 100 character limit on one exception in 
this diff:


diff /c/x3d-code/www.web3d.org/x3d/stylesheets/python/x3d.py x3d.py
3206c3206
<             raise X3DTypeError(str(value)[:100] + ' element ' + 
str(each) + ', type=' + str(type(each)) + ' is not a valid _X3DNode or 
_X3DStatement fo
r MFNode')
---
 >             raise X3DTypeError(str(value) + ' element ' + str(each) + 
', type=' + str(type(each)) + ' is not a valid _X3DNode or _X3DStatement 
for MFNo
de')
12303c12303
<                     result += each.JSON(indentLevel=indentLevel+1, 
syntax=syntax)
---
 >                     result += str(each.JSON())
42407c42407
<                     result += each.JSON(indentLevel=indentLevel+1, 
syntax=syntax)
---
 >                     result += each.JSON()
77412c77412
<                 result += 
self.geometry.JSON(indentLevel=indentLevel+1, syntax=syntax)
---
 >                 result += self.geometry.JSON()
89062c89062
<                     result += each.JSON(indentLevel=indentLevel+1, 
syntax=syntax)
---

>                      result += each.JSON()


I was able to stumble through to get some JSON output, but I don't 
particularly parse the whole input yet.  Code is attached, much more 
work is needed, but at least this sample input is starting to see the 
light of day!

To run, unpack the zip, and run $ python3 x3dinput.py

A local HelloWorld.json is the default input in the zip.   Perhaps we 
can discuss the progress tomorrow at 4pm?   I've already noticed some 
issues, but I will try to get to bed tonight.  I have a lot more 
confidence in my ability to at least create a sample JSON import 
module/package.  I'm a bit concerned that neither @version nor @profile 
were output. More work is needed on JSON Export.  There are a few things 
I see in the JSON export, like multiple "meta" objects, and SFVec3f 
being strings instead of arrays.  I will like get to geometry and 
appearance in the next few days.


{
  "X3D":
  { "head":
    { "meta":
      {
        "@content":"HelloWorld.x3d",
        "@name":"title"
      }
    },
    { "meta":
      {
        "@content":"Simple X3D model example: Hello World!",
        "@name":"description"
      }
    },
    { "meta":
      {
        "@content":"30 October 2000",
        "@name":"created"
      }
    },
    { "meta":
      {
        "@content":"11 June 2021",
        "@name":"modified"
      }
    },
    { "meta":
      {
        "@content":"Don Brutzman",
        "@name":"creator"
      }
    },
    { "meta":
      {
        "@content":"HelloWorld.tall.png",
        "@name":"Image"
      }
    },
    { "meta":
      {
        "@content":"https://en.wikipedia.org/wiki/Hello_world",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"https://en.wikipedia.org/wiki/Hello#.22Hello.2C_World.22_computer_program",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"https://en.wikipedia.org/wiki/"Hello,_World!"_program",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"https://en.wikibooks.org/w/index.php?title=Computer_Programming/Hello_world",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"https://www.HelloWorldExample.net",
        "@name":"reference2"
      }
    },
    { "meta":
      {
        "@content":"https://www.web3d.org",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"https://www.web3d.org/realtime-3d/news/internationalization-x3d",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"https://www.web3d.org/x3d/content/examples/HelloWorld.x3d",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"https://X3dGraphics.com/examples/X3dForAdvancedModeling/HelloWorldScenes/HelloWorld.x3d",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"https://X3dGraphics.com/examples/X3dForWebAuthors/Chapter01TechnicalOverview/HelloWorld.x3d",
        "@name":"identifier"
      }
    },
    { "meta":
      {
        "@content":"https://www.web3d.org/x3d/content/examples/license.html",
        "@name":"license"
      }
    },
    { "meta":
      {
        "@content":"X3D-Edit 4.0, https://savage.nps.edu/X3D-Edit",
        "@name":"generator"
      }
    },
    { "meta":
      {
        "@content":"HelloWorld.wrl",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"HelloWorld.x3dv",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"HelloWorld.x3db",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"HelloWorld.xhtml",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"HelloWorld.json",
        "@name":"reference"
      }
    },
    { "meta":
      {
        "@content":"14 October 2021",
        "@name":"translated"
      }
    },
    { "meta":
      {
        "@content":"X3dToJson.xslt, 
https://www.web3d.org/x3d/stylesheets/X3dToJson.html",
        "@name":"generator"
      }
    },
    { "meta":
      {
        "@content":"X3D JSON encoding: 
https://www.web3d.org/wiki/index.php/X3D_JSON_Encoding",
        "@name":"reference"
      }
    },
  }
  { "Scene":
None{ "WorldInfo":
      {
        "@info":""Example scene to illustrate a simple X3D model"",
        "@title":"Hello World!"
      }
    }
{ "Group":
{ "Viewpoint":
      {
        "@DEF":"ViewUpClose",
        "@centerOfRotation":"0 -1 0",
        "@description":"Hello world!",
        "@position":"0 -1 7"
      }
    },
{ "Transform":
{ "Shape":
  { "Appearance":
    },
}
}
{ "Transform":
{ "Shape":
  { "Appearance":
    },
}
}
}
  }
}



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