xod/docs/guide/nodes-for-xod-in-cpp/cos-example.step2.xodball

{
  "name": "cos-example",
  "patches": {
    "@/main": {
      "path": "@/main"
    },
    "@/cos": {
      "nodes": {
        "BJWf2zrbz": {
          "id": "BJWf2zrbz",
          "type": "xod/patch-nodes/input-number",
          "position": {
            "x": 68,
            "y": 0
          },
          "label": "RAD"
        },
        "S1vGhGBbz": {
          "id": "S1vGhGBbz",
          "type": "xod/patch-nodes/output-number",
          "position": {
            "x": 68,
            "y": 204
          }
        },
        "HkBQ6fBZG": {
          "id": "HkBQ6fBZG",
          "type": "xod/patch-nodes/not-implemented-in-xod",
          "position": {
            "x": 68,
            "y": 102
          }
        }
      },
      "comments": {
        "SJcQpGBWG": {
          "id": "SJcQpGBWG",
          "position": {
            "x": 136,
            "y": 102
          },
          "size": {
            "width": 204,
            "height": 51
          },
          "content": "That’s a C++ marker node. Double click it to edit the code."
        }
      },
      "path": "@/cos",
      "attachments": [
        {
          "filename": "patch.cpp",
          "encoding": "utf-8",
          "content": "\n// Ignore this for now. The definition is required by XOD but we\n// not use it for cos\nstruct State { };\n\n// This is an obligatory marker. XOD will put pin definitions there\n{{ GENERATED_CODE }}\n\n// The `evaluate` function is the node’s entry point. It is the only\n// function XOD requires to implement. The context parameter is a\n// black-box object you’ll pass to various API functions.\nvoid evaluate(Context ctx) {\n    // `getValue` function reads a pin. In angle brackets, it takes a\n    // name of the pin in form input_PINLABEL (input_RAD in our case)\n    Number x = getValue<input_RAD>(ctx);\n\n    // Next, we use regular C++ to perform some actions. Our case is trivial.\n    // All we have to do is to call the standard C++ cos function.\n    // Note the data type `Number`. It’s the type XOD uses to represent numbers\n    // on the current platform.\n    Number result = cos(x);\n\n    // `emitValue` is like `getValue`, but it writes values rather than read.\n    // Note we use `OUT` label to access our unlabeled output terminal.\n    // `OUT` is the default name when you omit the label.\n    emitValue<output_OUT>(ctx, result);\n}\n"
        }
      ]
    }
  }
}