Layered Polygons is a Python 3 program that loads a layered image file for defining polygons per layer. Those polygons can then be exported as 3d models.

• File
  • New... Open a layered image file to work on
  • Open... Open a Layered Polygon file
  • Save (As...) Save as a Layered Polygon file
  • Export As Export as a 3d model
  • Quit Quit program

Layered Polygons currently imports OpenRaster images as layered images and exports Wavefront Object files (together with material files).

After opening a layered image choose a layer in the list box.

To define a polygon start and continue left-clicking on the canvas to place vertices. Finish the polygon by left-clicking on the first vertex. If you left-click near enough to an existing vertex (of another polygon) the polygon will use it instead of creating a new one. Cancel a polygon in progress by right-clicking on the canvas. If the polygon is supposed to be greater than the current view port the scroll bars can be used without breaking anything.

To delete a polygon when not in polygon creation mode right-click on it.

Finally export the layered polygons as a 3d model.

Layered Polygons writes and reads the Layered Polygons File Format (.lp). An .lp file is a ZIP file containing a data.json and one image file per layer. The data.json is structured as follows:

{
  "width": Integer, // scene's width
  "height": Integer, // scene's height
  "layers": // array of scene's layers (optional, default: empty)
    [
      {
        "name": String, // layer's name (optional, default: "Layer <index>")
        "x": Integer, // layer's image's x offset
        "y": Integer, // layer's image's y offset
        "image": String, // path to layer's image in ZIP file
        "vertices": // array of layer's vertices (optional, default: empty)
          [
            {
              "x": Integer, // vertex's x coordinate
              "y": Integer // vertex's y coordinate
            },
            ...
          ],
        "polygons": // array of layer's polygons (optional, default: empty)
          [
            [
              Integer, // vertex index from "vertices" array
              ...
            ],
            ...
          ]
      },
      ...
    ]
}

Layered Polygons can be used to easily polygonify elements in comic book panels to then be animated in a 3d software. (Example videos to follow.)