When working with 3D, skeletal deforms are common for characters and creatures and most 3D modelling applications support it. For 2D, as this function is not used as often, it's difficult to find mainstream software aimed for this.
One option is to create animations in third-party software such as Spine or Dragonbones. From Godot 3.1 onwards, though, this functionality is supported built-in.
Why would you want to do skeletal animations directly in Godot? The answer is that there are many advantages to it:
Bessere Integration in die Engine, damit weniger Aufwand beim Importieren und Bearbeiten durch ein externes Tool entsteht.
Möglichkeit zur Steuerung von Partikelsystemen, Shadern, Sounds, Aufrufskripten, Farben, Transparenz usw. in Animationen.
Das in Godot eingebaute Skelettsystem ist sehr effizient und auf Leistung ausgelegt.
In der folgenden Anleitung werden dann die 2D-Skelettverformungen erklärt.
Before starting, we recommend you to go through the Ausschnitts-Animation tutorial to gain a general understanding of animating within Godot.
For this tutorial, we will be using a single image to construct our character.
Download it from
gBot_pieces.png or save the
It is also advised to download the final character image
gBot_complete.png to have a good reference
for putting the different pieces together.
Create a new scene for your model (if it's going to be an animated character,
you may want to use a
KinematicBody2D). For ease of use, an empty 2D node is
created as a root for the polygons.
Begin with a
Polygon2D node. There is no need to place it anywhere in the
scene for now, so simply create it like this:
Wählen Sie es aus und weisen Sie die Textur den zuvor heruntergeladenen Charakterteilen zu:
Das direkte Zeichnen eines Polygons wird nicht empfohlen. Öffnen Sie stattdessen das Dialogfeld "UV" für das Polygon:
Head over to the Points mode, select the pencil and draw a polygon around the desired piece:
Duplicate the polygon node and give it a proper name. Then, enter the "UV" dialog again and replace the old polygon with another one in the new desired piece.
When you duplicate nodes and the next piece has a similar shape, you can edit the previous polygon instead of drawing a new one.
After moving the polygon, remember to update the UV by selecting Edit -> "Polygon -> UV" in the Polygon 2D UV Editor.
Machen Sie so weiter, bis Sie alle Teile zugeordnet haben.
You will notice that pieces for nodes appear in the same layout as they do in the original texture. This is because by default, when you draw a polygon, the UV and points are the same.
Rearrange the pieces and build the character. This should be pretty quick. There is no need to change pivots, so don't bother making sure rotation pivots for each piece are right; you can leave them be for now.
Ah, the visual order of the pieces is not correct yet, as some are covering wrong pieces. Rearrange the order of the nodes to fix this:
Und da haben Sie es! Es war auf jeden Fall viel einfacher als in der Ausschnitt-Anleitung.
Skeleton2D node as a child of the root node. This will be the base
of our skeleton:
Bone2D node as a child of the skeleton. Put it on the hip (usually
skeletons start here). The bone will be pointing to the right, but you can
ignore this for now.
Erstellen Sie weiterhin Bones in der Hierarchie und benennen Sie sie entsprechend.
At the end of this chain, there will be a jaw node. It is, again, very short and pointing to the right. This is normal for bones without children. The length of tip bones can be changed with a property in the inspector:
In this case, we don't need to rotate the bone (coincidentally the jaw points right in the sprite), but in case you need to, feel free to do it. Again, this is only really needed for tip bones as nodes with children don't usually need a length or a specific rotation.
Machen Sie weiter und bauen Sie das ganze Skelett auf:
You will notice that all bones raise an annoying warning about a missing rest pose. This means that it's time to set one. Go to the skeleton node and create a rest pose. This pose is the default one, you can come back to it anytime you want (which is very handy for animating):
The warnings will go away. If you modify the skeleton (add/remove bones) you will need to set the rest pose again.
Select the previously created polygons and assign the skeleton node to their
Skeleton property. This will ensure that they can eventually be deformed by
Klicken Sie auf die oben hervorgehobene Eigenschaft und wählen Sie den Skelett-Node aus:
Öffnen Sie erneut den UV-Editor für das Polygon und gehen Sie zum Abschnitt Knochen.
You will not be able to paint weights yet. For this you need to synchronize the list of bones from the skeleton with the polygon. This step is done only once and manually (unless you modify the skeleton by adding/removing/renaming bones). It ensures that your rigging information is kept in the polygon, even if a skeleton node is accidentally lost or the skeleton modified. Push the "Sync Bones to Polygon" button to sync the list.
The list of bones will automatically appear. By default, your polygon has no weight assigned to any of them. Select the bones you want to assign weight to and paint them:
Points in white have a full weight assigned, while points in black are not influenced by the bone. If the same point is painted white for multiple bones, the influence will be distributed amongst them (so usually there is not that much need to use shades in-between unless you want to polish the bending effect).
After painting the weights, animating the bones (NOT the polygons!) will have the desired effect of modifying and bending the polygons accordingly. As you only need to animate bones in this approach, work becomes much easier!
But it's not all roses. Trying to animate bones that bend the polygon will often yield unexpected results:
This happens because Godot generates internal triangles that connect the points when drawing the polygon. They don't always bend the way you would expect. To solve this, you need to set hints in the geometry to clarify how you expect it to deform.
Open the UV menu for each bone again and go to the Points section. Add some internal vertices in the regions where you expect the geometry to bend:
Now, go to the Polygon section and redraw your own polygons with more detail. Imagine that, as your polygons bend, you need to make sure they deform the least possible, so experiment a bit to find the right setup.
Once you start drawing, the original polygon will disappear and you will be free to create your own:
This amount of detail is usually fine, though you may want to have more fine-grained control over where triangles go. Experiment by yourself until you get the results you like.
Note: Don't forget that your newly added internal vertices also need weight painting! Go to the Bones section again to assign them to the right bones.
Sobald Sie fertig sind, erhalten Sie viel bessere Ergebnisse: