collada

I'm working on writing my own COLLADA importer. I've gotten pretty far, loading meshes and materials and such. But I've hit a snag on animation, specifically: joint rotations. The formula I'm using for skinning my meshes is straight-forward: weighted; for (i = 0; i < joint_influences; i++) { weighted += joint[joint_index[i]]->parent->local_matrix * joint[joint_index[i]]->local_matrix * skin->inverse_bind_pose[joint_index[i]] * position * skin->weight[j]; } position = weighted; And as far as the literature is concerned, this is the correct formula. Now, COLLADA specifies two types of rotations

Google's Sketchup is a nice, simple 3D-object modeler. Moreover Google has an enormous warehouse of 3D objects so that you actually don't have to do much modeling yourself if you aren't particularly gifted in this area. Many of the 3D buildings in Google Earth are made with Sketchup. The capability to import Sketchup's SKP files in Mathematica would be very nice, but alas, it doesn't do that yet. The free version of Sketchup doesn't export to any other formats than the KMZ (Google Earth) and DAE (Collada) formats. Though MMA can read KMZ/KML files it doesn't read those containing 3D objects.

I'm new to ThreeJS and I'm trying to load collada files into a viewer. I've started by copying the code for the Elf colladaLoader demo. https://threejs.org/examples/#webgl_loader_collada I've got that working fine inside an 800px square modal window and it looks good. Trouble is when I load any other .dae file it's not centered. The demo is obviously created with all the right settings to put the object and the camera in the right place, but I don't know what files are going to be loaded. Is there any way of getting the camera to look directly at the object so it's centered and position it far

1) start local web server C:\Users\Public\Documents\Rick>http-server . -p 8832 --cors Starting up http-server, serving . on: http://0.0.0.0:8832<br/> Hit CTRL-C to stop the server<br/><br/> **partial log** from (node.js) http-server . -p 8832 --cors<br/><br/> [Mon, 15 Jun 2015 18:14:57 GMT] "GET /2015_03_19_Try6a3D_dae/2015_03_19_Try6a3D/scrn_ground.png" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.124 Safari/537.36"<br/><br/> 2) start html file that loads 2015_03_19_Try6a3D_dae/2015_03_19_Try6a3D.dae from collada.html (javascript console)<br/>

I'm trying to load a .dae file into SCNScene, using the following code: let solutionScene = SCNScene(named: "art.scnassets/level1.dae") print(solutionScene?.rootNode) // prints nil solutionNode = solutionScene?.rootNode.childNode(withName: "level1", recursively: true) I exported the .dae file from Blender as COLLADA with default settings, contains just a one simple object. When i click on the .dae file in my art.scnassets folder in XCode, it opens without problem and i can see the geometry, camera etc. I just can't get it loaded in the SCNScene. Is there anything i missed either on Blender