{
  "extends": "proxy/aframe/ascene.vwf",
  "methods": {
    "initialize": {
      "body": "    var calc = vwf_view.kernel.find(\"\", \"/calcText\")[0];\n    console.log(calc);\n    vwf_view.kernel.callMethod(calc, \"calcMe\");\n",
      "type": "application/javascript"
    }
  },
  "children": {
    "assetBG2": {
      "extends": "proxy/aframe/a-asset-image-item.vwf",
      "properties": {
        "itemID": "bg2",
        "itemSrc": "/defaults/assets/checker.jpg"
      }
    },
    "light1": {
      "extends": "proxy/aframe/alight.vwf",
      "properties": {
        "type": "ambient",
        "color": "#BBB"
      }
    },
    "light2": {
      "extends": "proxy/aframe/alight.vwf",
      "properties": {
        "type": "directional",
        "color": "#FFF",
        "intensity": "0.6",
        "position": [
          -0.5,
          1,
          1
        ]
      }
    },
    "groundPlane": {
      "extends": "proxy/aframe/aplane.vwf",
      "properties": {
        "height": "50",
        "width": "50",
        "rotation": [
          -90,
          0,
          0
        ]
      },
      "children": {
        "material": {
          "extends": "proxy/aframe/aMaterialComponent.vwf",
          "properties": {
            "wireframe": false,
            "src": "#bg2",
            "repeat": "10 10"
          }
        }
      }
    },
    "calcResult": {
      "extends": "proxy/aframe/atext.vwf",
      "properties": {
        "value": "",
        "color": "#1d7027",
        "position": [
          1,
          2.5,
          -2
        ],
        "scale": [
          3,
          3,
          3
        ],
        "side": "double"
      }
    },
    "calcText": {
      "extends": "proxy/aframe/atext.vwf",
      "properties": {
        "expr": {
          "set": "this.expr = value; this.calcMe()",
          "value": "1 * pi"
        },
        "value": "",
        "color": "#b74217",
        "position": [
          -1,
          2.5,
          -2
        ],
        "scale": [
          2,
          2,
          2
        ],
        "side": "double"
      },
      "methods": {
        "calcMe": {
          "body": " this.value = this.expr; let match = this.calcLang.grammar.match(this.value);\n    if (match.succeeded()){\n      if (typeof this.calcLang.semantics === 'function'){\n    let result = this.calcLang.semantics(match).interpret(); \n if (this.parent.calcResult && (typeof this.parent.calcResult.value == 'string')) {\n this.parent.calcResult.value = result \n} \n   }}\n    //this.future( 0.1 ).calcMe();\n",
          "type": "application/javascript"
        }
      },
      "children": {
        "calcLang": {
          "extends": "proxy/ohm/node.vwf",
          "properties": {
            "ohmLang": "Arithmetic {\n      Exp\n        = AddExp\n\n      AddExp\n        = AddExp \"+\" MulExp  -- plus\n        | AddExp \"-\" MulExp  -- minus\n        | MulExp\n\n      MulExp\n        = MulExp \"*\" ExpExp  -- times\n        | MulExp \"/\" ExpExp  -- divide\n        | ExpExp\n\n      ExpExp\n        = PriExp \"^\" ExpExp  -- power\n        | PriExp\n\n      PriExp\n        = \"(\" Exp \")\"  -- paren\n        | \"+\" PriExp   -- pos\n        | \"-\" PriExp   -- neg\n        | ident\n        | number\n      ident  (an identifier)\n        = letter alnum*\n\n      number  (a number)\n        = digit* \".\" digit+  -- fract\n        | digit+             -- whole\n    }\n"
          },
          "methods": {
            "initLang": {
              "body": "    console.log(\"add operations to semantics\")\n    this.addOperationLang();\n",
              "type": "application/javascript"
            },
            "addOperationLang": {
              "body": "    var constants = {pi: Math.PI, e: Math.E};\n    this.semantics.addOperation('interpret', {\n    Exp: function(e) {\n         return e.interpret();  \n      },\n    AddExp: function(e) {\n      return e.interpret();\n    },\n    AddExp_plus: function(x, _, y) {\n      return x.interpret() + y.interpret();\n    },\n    AddExp_minus: function(x, _, y) {\n      return x.interpret() - y.interpret();\n    },\n    MulExp:        function(e)         { return e.interpret(); },\n    MulExp_times:  function(x, _, y)   { return x.interpret() * y.interpret(); },\n    MulExp_divide: function(x, _, y)   { return x.interpret() / y.interpret(); },\n    ExpExp:        function(e)         { return e.interpret(); },\n    ExpExp_power:  function(x, _, y)   { return Math.pow(x.interpret(), y.interpret()); },\n    PriExp:        function(e)         { return e.interpret(); },\n    PriExp_paren:  function(_l, e, _r) { return e.interpret(); },\n    PriExp_pos:    function(_, e)      { return e.interpret(); },\n    PriExp_neg:    function(_, e)      { return -e.interpret(); },\n    ident: function(_l, _ns) {\n    // Look up the value of a named constant, e.g., 'pi'.\n    return constants[this.sourceString] || 0;\n    },\n      number: function(_) {\n        // Use `parseFloat` to convert (e.g.) the string '123' to the number 123.\n        return parseFloat(this.sourceString);\n      }\n        })\n",
              "type": "application/javascript"
            },
            "testLang": {
              "body": "    var match = this.grammar.match('2+2');\n    console.log(match);\n    var res = this.semantics(match).interpret();\n    console.log(res);\n",
              "type": "application/javascript"
            }
          }
        }
      }
    },
    "sky": {
      "extends": "proxy/aframe/asky.vwf",
      "children": {
        "material": {
          "extends": "proxy/aframe/aMaterialComponent.vwf",
          "properties": {
            "color": "#ECECEC",
            "side": "back"
          }
        }
      }
    }
  }
}