Here is the initialization file for the laas-box: This association is provided by the initialization file. To do so, we need to associate 2D points with particular 3D points in the tracked object. compute the best pose such as the 3d pose projection matches the clicked points.repeat for all points in the initialization file.let the user click on a predetermined object location such as a corner.To compute the initial pose, the client does as follow: The initialization file is used by the client to compute the object initial pose.
AC3D TUTORIALS FULL
Therefore, do not give to the tracker a full model of your object, trim all the lines which cannot be tracked precisely (bad gradient, hardly visible.).īlender - open source, powerful modeling softwareĪC3d - proprietary/non-free simple modeling software It is also important to notice that the tracking frequency decreases as the number of tracked lines increases. They are taken into account and if they are not correctly oriented (normal vector toward outside the object), the tracker will fail. Warning: the surface normals are used to determine if a face is visible or not. Therefore, when loading an object, the lines are extracted from the 3D model and all the other information are discarded. Keep in mind that this tracker tracks lines. That is why we suggest to use only a 3D modeling software to determine the 3D coordinates of some points and create the CAD model manually. An example of such a model that doesn't work with moving-edges features is given here. In that case the model will contain all the triangle edges even those that are not real object contours.
But in that case, be careful since all the triangles will be exported. Once created, modify ~model_name parameter to my-box.Īny 3D modeling software can be used as long as it can export its models to the VRML format. My-box.ppm: this file is optional and corresponds to an image that shows where the user has to click to initialize the tracker.Īdditionally, my-box.0.pos contains the last initial pose and is created automatically by the client. The signification of the tracker settings is given here. Tracker.yaml: best tracking parameters for this object (optional). The content of this file is described here. My-box.init: initialization file used to estimate the initial pose by clicking on 2D points in the image. My-box.wrl: object CAD model in VRML format. This home-made format is described in here. The CAD model of the object to consider, either in. In this new my-box folder you have to introduce the following files: In this case, you have to fill the ~model_path parameter accordingly when starting the client (or initializing the object using the 'init_tracker' service).Ĭonsider that you want to track a new object called my-box.Ĭreate first a folder called my-box, for example in the models folder besides existing laas-box. You can either add your own object in a new directory located in the models directory or choose to put your directory else where. The object database is located by default in the models directory were tree objects are provided: laas-box, floppy-box and shelf. To use the tracker with your own object, you need to create an object database. If you are not familiar with ViSP model-based tracker, follow first the ViSP model-based tutorial. Providing the recommended tracking parameters.
AC3D TUTORIALS MODS
I also included this free tutorial with the 3D models mods package that I created for the screensaver (it includes 75 3D models for the screensaver) that is also available freely there in my Deviantart gallery. The AC3D screensaver program is freely available at:
AC3D TUTORIALS HOW TO
Transparencies for example are a bit tricky and I will tell you how to correct problems with that completely and many other important things like how to deal with the problems that you will likely encounter with the textures and how to make the colors look correct in the screensaver cause if you don’t set them in a specific way they will render very grayish and ugly. It is not hard to do them but they must follow some specific guidelines that will make them work correctly and you don’t have to go figuring out how to do this properly (it can take several hours or more) cause I already did all that work for you.
AC3D TUTORIALS PDF
This PDF tutorial will tell you how to create 3D models with Blender 2.63a correctly so they can be used with the freely available AC3D 3D screensaver program from Inivis.
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