I would be grateful for some suggestions for best best practice.
I am a proficient user of Sketchup for a dozen years. I can make my way around blender.
I have a need to model a wind turbine which ends up in gltf and imported into cesium with animated blades and orientation (ie. two animations).
Over the last couple of weeks I have learnt how to animate the blades in the correct plane in blender at appropriate revolution speed. I now have an animated model ready for export with seemingly good structure / hierarchy of parts.
If I export to fbx the blade rotation is correct but materials and textures are missing. Plus I can't migrate it to Gltf as every option I try fails.
If I use the gltf exporters from Khronos when running the animation the blades disappear altogether. If I use the other gltf exporter the blade angle gets corrupted (unlike fbx) and no animation survives the export. If I import the fbx back into blender the model is intact (except no materials) and the rotation works as exported. If I export as Collada / dae the blades drop from the top of the model to the bottom and there is no animation.
I have played hours of videos, searched and read endless Web pages but after weeks of effort I have failed to get anywhere near my goal - an animated gltf that I can import into Cesium.
Every step of the way is plagued by imponderable next steps to fix the problem. I have run out of puff.
I would be hugely grateful for some best case suggestions on doing something which seems like it should be simple but simply isn't.
Regards
dawrightau
Related
We have an issue with exporting our 3D Assets and animations correctly so that three.js can correctly display them.
All our 3D artists work with Cinema4D so we need to go through blender to export a three.js compatible JSON. They export the scene as FBX and then import it to blender. This seems to work fine. The model looks good there (with Material View set in Preview Window) and the simpler models we exported even worked with textures and animations.
But we now have a scene where, when we load the resulting JSON, some of the meshes are flipped 180° (but only some - the trees) and one of the models (Santa model) is not textured. They all look fine in blender.
When loading the JSON in https://threejs.org/editor/ you will immediately see the issues:
Is this an export problem? Can we fix it by tweaking the export params? Will we need to adjust the model in blender?
I would advise a couple things here:
File a bug on three.js including the .blend file
Try freezing transforms in Blender or C4D before export
Perhaps try a different three.js-compatible blender exporter, like glTF-Blender-Exporter.
I'm new to both Blender and ThreeJs and searched a lot before asking. I created a model with Blender and esported it as .dae so I can load it in the html canvas. The problem is that only the model is loaded and not the textures. I'm doing something wrong or it's the loader that somehow causes the problem?
Here is the sample:
http://provasitimek.herobo.com/firstImport2.html
and the code:
https://github.com/MarcinKwiatkowski1988/learningThreeJs/tree/master/ThreeJs_and_blender
PS. the blender version is 2.70 (so maybe the problem lays here?)
PS2: So, after many attempts, these are my conclusions:
to get the color of the object, you have to choose the Blender renderer and not Cycles renderer
the export to the file .dae is not realy significant, should working with all options (or at least I didn't find any differences between files exported with different options)
if you use Blender renderer and any basic materials (Basic, Lambert, Phong) you get only the color on the object rendered in threeJs: so, for example, if you apply a trasparency to you object on blender, you will not see it on the rendered object on threeJs
with my current level (i just started to learn threeJs and blender 2 weeks ago) this is as far as I can help. Hope someone with higher skills like #mrdoob would figure out what the problem is
THREE.js does not pair models and textures until you actually make a mesh. Export The model and texture separately, load them separately and call
new THREE.Mesh(blenderGeometry,blenderTexure)
I want to bake my model lightmap in blender then load them all in three.js.
So in blender i set two uvs for each objects and baked ambient occlusion in second uv. finally i exported whole scene via three.js exporter into js file.
(exporter has problem that the baked texture goes for diffuse-map not light-map which is correctable by editing exported js file).
But the problem is when i load js with SceneLoader, the textures especially for my floor goes wrong, like upside down.
here is my test files: Test Light Map
So is there something wrong with my blender file or ...? Which loader i should use for it?
Thanks.
I just upload some images to see what i mean:
Messed up textures:
After edit js file, it's get better. but still there is problem at the edges:
And specially at floor, the light-map goes wrong:
Ok, i don't know why, but it seems my uvs was messed up in blender. i did some recaculate normals and flip normals in blender and now textures map fine on objects.
But i still need to edit exported scene to change map:texture.png to lightMap:texture.png.
[EDIT]
Actually this is a bug related to three.js scene exporter: Blender Exporter - Scene Exporting
[Final Answer]
The problem was about my model which had a negative scale in blender. i select my model, hit crtl+a then choose scale. now everything's fine.
http://www.diviniaro.com/WGClient/js/three.js/examples/webgl_loader_collada_Gate.html
After trying several things we're just left at a loss to get the exported animation from blender to load. I have noticed a few differences from the example "monster.dae" file in the collada loader. No matter what we've tried the animation just never seems to start.
Other opinions and a second set of knowledgeable eyes would be appreciated. The animations play fine in blender. There are 31 keyframes. There are also no errors on the console.
EDIT:
I think that this issue pertains to these issues with the three.js collada loader.
https://github.com/mrdoob/three.js/issues/2963
I am beginner to medium skills, I can create mesh with many polygons, I need to texture map it, those i can handle, but, how to make it Roll Up and UnRoll (I can handle the keyframe animation - but, i just don't know what to do to make the carpet unroll or rollup. Can be carpet or roll of paper towels, just need to know how to do the effect? There are tutorials how to do it with Cinema 4D or Maya - but, i want to do it on the website within the Three.js framework. Any ideas ???
Or is there a way to export the animation data from, say, Blender or Maya?
Thanks
Maybe this one?
http://mrdoob.github.com/three.js/examples/webgl_animation_cloth.html
Let's search for a tutorial on youtube to create the animation in Blender or in Maya
(e.g.: http://www.youtube.com/watch?v=tN_FZiTbaG0)
Create your animation and export your scene into collada (.dae) format
Use the collada loader "webgl_loader_collada_keyframe.html" example file to run your animation. (Replace "pump.dae" with your just exported animation in the example file.)
you could also try using this as3mod port for three.js to manually "roll" a plane. http://nikos-web-development.netai.net/blog/mod3-a-javascript-port-of-as3mod-for-three-js/