Road with borders using "animation fg" feature

[danekbel]

Want to make that pretty road with borders?

preview.png (266.26 KiB) Viewed 1778 times

Then read the tutorial!

As you can see, cars aren't visible behind the borders. If you provide that borders directly to the road texture, cars would just ride over it, but, not now.

It became possible because of existing of animation fg feature.

REQUIREMENTS

For that borders, you should provide them as a animation. For our case, we need just two of them:

border_fg_left.png (251 Bytes) Viewed 1778 times

border_fg_right.png (277 Bytes) Viewed 1778 times

TEXTURE

The background is directly applied to the road frames:

frames.png (3.72 KiB) Viewed 1778 times

JSON

The important part is to figure out for which frames which animation has to be shown. Here a sketch where the needed fg animations are marked:

frames_where_borders_are_needed.png (6.92 KiB) Viewed 1778 times

And then some of magic in our code:

Code: Select all

[
  {
    "id":"$anim_road_bordered00_left00",
    "type":"animation",
    "frames":[{"bmp":"border_fg_left.png","handle y":8}]
  },
  {
    "id":"$anim_road_bordered00_right00",
    "type":"animation",
    "frames":[{"bmp":"border_fg_right.png","handle y":8}]
  },
  {
    "id":"$road_bordered00",
    "type":"road",
    "level":2,
    "frames":[{"bmp":"frames.png","w":32,"count":16}],
    "animation fg":[
      {"id":"$anim_road_bordered00_left00"},
      {"id":"$anim_road_bordered00_right00"}
    ],
    "frame animation fg indices":[
      [0,1],
      [0],
      [0,1],
      [0],
      
      [0,1],
      [0],
      [0,1],
      [0],
      
      [1],
      [],
      [1],
      [],
      
      [1],
      [],
      [1],
      []
    ]
  }
]

We have two images (animation objects) for the front left/right border. We can say for which of the 16 road frames which animation (or both or none of them) should be shown. That's what the long (maybe a bit scary) array is good for:

Code: Select all

    "frame animation fg indices":[
      [0,1],  // Show 0th and 1th animation for first frame, that means left & right border
      [0],  // Show only left border for second frame
      [0,1],  // Show left & right borders for third frame
      [0],  // Show only left border for fourth frame
      
      [0,1], // Show left & right ...
      [0],  // Show only left
      [0,1], // Show left & right
      [0],  // Show only left
      
      [1],  // Show right
      [],  // No front border
      [1],  // Show right
      [],  // No front border
      
      [1],  // Show only left
      [],  // No front border
      [1],  // Show only left
      []  // No front border
    ]

And voila! Our plug-in is finished.

bordered_road.zip

(11.77 KiB) Downloaded 97 times

---

Big thanks to @Lobby for texture, text and realisation of this feature itself.

[TheFennekin]

Yes!

[choggoba]

very very thanks