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Starling SkeletonSprite renderMeshes question

Nimai

I was wondering for a while why meshes just weren't showing up at all... guess I need to RTFM more! There's a renderMeshes constructor argument to SkeletonSprite which (of course) controls whether meshes are rendered.

Got it. Must have been to optimize? Non-mesh skeletons?

Anyway, I set it to true for my test, and now I see two issues:
1) The texture for the mesh (from an atlas) is not right. Wrong UVs or something?
2) I have two images: one mesh, one regular image. The regular image isn't showing up with renderMeshes=true

I'm pretty sure I'm doing something wrong, but could use some suggestions. Skeletons that mix mesh and non-mesh attachments should work fine, right?

This code had me wondering:

if (_renderMeshes)
   renderMeshes(support, alpha);
else
   renderRegions(support, alpha);

Søren

Make sure you don't strip white space when you export the texture atlas.
Not sure what could be wrong there. :bang:

Nate

Yes, it's an optimization. Starling is better at rendering quads, so it can do more batching.

When rendering meshes the region attachments should still render, just using similar code as what renders meshes. In the goblin example, the shield is a region attachment.

Nimai

Thanks - I'll keep messing with it. If I have renderMeshes true, but my Skeleton doesn't use meshes, will it still use the mesh rendering code path? Our stuff is heavily data driven, so I don't necessarily know whether the data has meshes or not in it.

Ended up adding the following function to SkeletonSprite. (I tried to add it to my class that extends SkeletonAnimation, but _renderMeshes and _polygonBatch are private, and the PolygonBatch class itself is internal.)

protected function checkForMeshes():void {
   if (_skeleton != null) {
      var slots:Vector.<Slot> = _skeleton.slots;
      var meshesFound:Boolean = false;
      for (var i:int=0; i<slots.length; i++) {
         var attachment:Attachment = slots[i].attachment;
         if (attachment is SkinnedMeshAttachment || attachment is MeshAttachment) {
            meshesFound = true;
            break;
         }
      }
      if (meshesFound) {
         if (!_renderMeshes) {
            _renderMeshes = true;
            _polygonBatch = new PolygonBatch();
         }
      } else {
         if (_renderMeshes) {
            _renderMeshes = false;
            _polygonBatch.dispose();
            _polygonBatch = null;
         }
      }
   }
}

Nate

To detect if SkeletonData has a mesh:

var skins:Vector.<Skin> = skeletonData.skins;
outer:
for (var i:int = 0, n:int = skins.length; i < n; i++) {
   var attachments:Object = skins[i].attachments;
   for each (var attachment:Attachment in attachments) {
      if (attachment is SkinnedMeshAttachment || attachment is MeshAttachment) {
         renderMeshes = true;
         break outer;
      }
   }
}

Your function does it for the current attachments, which is fine, though animations could change attachments later and show a mesh.