Is there an XML file format for describing animation movements?
Is SVG what is currently used? I want to describe 3d information for movements in a format that I can then use in Papervision.
Maybe you can take a look at SMIL which is a XML language for multimedia presentations containing timing, transitions, animations which can be combined with SVG. It's recommended by W3C.
If you're interested in 3d animations then you should consider X3D which is an XML language for 3d which also contains animations. It's developed by webd3d
But I don't know about usage in papervision.
For X3D take a look at X3Dom
http://x3dom.org
http://github.com/x3dom/x3dom
Related
Framework: Phaser.js version 3
Symfony 5
Langage: Javascript,
HTML5,
CSS3
Hello, I'm learning Phaser.js 3; I would like to create smooth animations (25fps) with lots of frames in my spritesheet. Is it possible to use large spritesheets to create animations without writing the name of each frame each time? If I have 230 frames, I cannot write the name of each frame... Thank you in advance for your answer
Yes it should be possible, you can generate the names with generateFrameNames or generateFrameNumbers, here is the link to the documentation, and here an example.
Or you can use a configuration file (json) to define the animations, like shown in this example.
for this there are texture packer tools, for example this one http://free-tex-packer.com/, that can help.
btw.: If you want smooth animations, and havn't created the spritesheets already, may be (spine-)bones animations might be a easy and space saving option, here is two example from the official website http://phaser.io/examples/v3/view/spine/basic-spineboy and http://phaser.io/examples/v3/view/spine/batch-test
Here a short video highlights the benefits of bones for phaser games https://www.youtube.com/watch?v=sq6mnix8eAg , it is very basic and not very technical
I'm working on an application in which Users can draw lines (with or without arrowheads). Similar to PowerPoint or SnagIt, but on a 3D plane."
Basically I would like to be able to create some line types like in the attached draft:
I've seen the fat lines demo (https://threejs.org/examples/#webgl_lines_fat). But lines don't seem to change width when zooming, and they don't have perspective.
There is also this 3rd party library THREE.MeshLine (https://github.com/spite/THREE.MeshLine) which has some nice features, even dashed lines animation, but before experimenting with it I would like to see what ThreeJS can do by itself.
1) Using ThreeJS Line is there a way to get:
Size and perspective change depending on camera distance/zoom or angle.
Dotted lines (Maybe extending DashedLineMaterial?).
2) Maybe there is a library other than THREE.MeshLine that does what I need?
MeshLine is definitely what you want. Three.js's line implementations are all pixel based and don't really fit your needs. MeshLine is well written and performant, I use it myself for a similar purpose - it'll serve you well.
I use WebGL.
Is there a way to modify a .obj file (or another 3D file) for example on photoshop? When I do some change on such a file, I would like it to keep the changes I made when I load it on a website.
I know it is not possible with .obj, so is there another format to do this?
I think you can load some 3d files into photoshop these days, but I'm pretty sure you will not be able to modify them.
To modify .obj files you can use 3d software such as 3DS Max or Maya, or you could use an online tools such as the three.js editor or claria.io
There are probably various ways to achieve what you want.
If I understood you correctly, you actually have multiple questions, here are some answers:
Which 3D editing software could I use?
If you want to perform some modification with a powerful 3D modeling tool, I would recommend to download and try blender. It is completely free, but in fact a very advanced 3D modeling software.
In case you just want to smooth your mesh, simplify it, or apply some other generic operation like this, then MeshLab might be sufficient (also available for free).
Which 3D model format should I use for delivering my 3D asset on the Web?
If you use X3DOM for displaying your 3D file, you can use the standardized X3D format (like OBJ, X3D content can be imported / exported in both, blender and meshlab). This has the advantage that you can use X3DOM's inline tag and directly import an X3D file, which means you can edit the 3D content without needing to re-convert your data for the Web.
However, using OBJ, X3D or whatever text-based delivery format might not be the wisest choice if your 3D asset is large, since this will introduce long download times. Therefore, if you have complex assets / scenes, you should also consider to convert your 3D assets to a compact, optimized delivery format for the Web, such as glTF or SRC.
I'm writing a plug-in for Maya by which I want to let user render the scene by some algorithms and output some maps(diffuse map, normal map and light map) to a specific file in a specific format. Of course, I've done generating the related texture data in the algorithms, but now I'm stuck on how to turn them into images. I need my image data support PNG, OpenEXR, DDS, and TGA. What I know for now is that there is a API Class MImage which could do the similar task, yet none of above is supported except TGA.
How can I achieve this?
Thanks joojaa. After some delving I found actually MImage does support most LDR formats, such as png, dds, tga and tif. But it still got no way to handle openEXR. So for exr I decide to customize my implementations. Indeed I shouldn't rely on MImage too much !
I am trying to do animations on iPhone using OpenGL ES. I am able to do the animation in Blender 3D software. I can export as a .obj file from Blender to OpenGL and it works on iPhone.
But I am not able to export my animation work from Blender 3D to OpenGL. Can anyone please help me to solve this?
If you have a look at this article by Jeff LaMarche, you'll find a blender script that will output a 3D model to a C header file. There's also a followup article that improves upon the aforementioned script.
After you've run the script, it's as simple as including the header in your source, and passing the array of vertices through your drawing function. Ideally you'd want a method of loading arbitrary model files at runtime, but for prototyping this method is the simplest to implement.
Seeing as you already have a method of importing models (obj) then the above may not apply. However, the advantage of using a blender script is that you can then modify the script to suit your own needs, perhaps also exporting bone information or model keyframes.
Well first off, I wouldn't recommend .obj for this purpose since the obj file format doesn't support animation, only static 3D models. So you'll need to export the animation data as a separate file that you load at the same time as the obj.
Which file format I would recommend depends on what exactly your animations are. I don't remember off the top of my head what file formats Blender supports, but as I recall it does not export Collada files with animation, which would be the most general recommendation. Other options would be md2 for character animations, or 3ds for simple "rigid objects moving around" animations. I think Blender's FBX exporter will work, although that file format may be too complicated for your needs.
That said, and assuming you only need simple rigid object movements, you could use .obj for the 3D model shapes and then write a simple Python script to export a file from Blender that has at the keyframes listed, with the frame, position, and rotation for each keyframe. Then load that data in your code and play back those keyframes on the 3D model.
This is an old question and since then some new iOS frameworks have been released such as GLKit. I recommend relying on them as much as possible when you can, since they take care of many inherent conversions like this, though I haven't researched the specifics. Also, while not on iOS, the new Scene Graph technology for OS X (which will likely arrive on iOS) in the future, take all this quite a bit further and a crafty individual could do some conversions with that tool and then take the output to iOS.
Also have a look at SIO2.
I haven't used recent versions of Blender, but my understanding is that it supports exporting mesh animation as a sequence of .obj files. If you can already display a single .obj in your app, then displaying several of them one after another will achieve what you want.
Now, note that this is not the most efficient form to export this type of animation, since each .obj file will have a lot of duplicated info. If your mesh stays fixed over time (i.e. only the vertices move with the polygon structure, uv coords, etc. all fixed) then you can just import the entire first .obj and from the rest just read the vertex array.
If you wanted to optimize this even more, you could compress the vertex arrays so that you only store the differences from the previous frame of the animation.
Edit: I see that Blender 2.59 has export to COLLADA. According to the Blender manual, you can export object transformations, and you can also export baked animation for rigged objects. The benefit for you in supporting the COLLADA format in your iPhone app is that you are free to switch between animation tools, since most of them export this format.