is an add-on to Luma3DS where, if your 3d mode slider is at maximum, your 3ds will take a screenshot of the top screen 3d image-pairs every 3.5 seconds and save it to luma/screenshots in your SD root. I made this so that I could collect a large dataset of 3d image-pairs, for training a machine learning model to predict 3d image-pairs from a single input image.
The 3ds 3d mode (and other stereoscopic 3d technology) works by displaying 2 images on the top screen at the same time, using a hardware shutter to block your view so that your eyes are viewing different images. The 2 images differ in that one is perspective shifted from the other, which creates an optical illusion that simulates depth to the viewer. A more in-depth explanation can be found here.
If you can easily generate these 3d image pairs, you can create a ML-model to display 2d-images in 3d. This could be useful for artists who have to manually "draw in" the 3d mode for movies, or for implementing 3d-viewing for any application. This add-on lets me collect a large amount of 3d image-pairs just by playing video games, which is pretty easy as far as dataset collection goes, and helps to exercise full control over development of a 3d stereo image-pair prediction model.
My code instantiates 2 threads in the rosalina process. One thread screen-captures the top screen, sending it to cache, then calls the second thread. The second thread writes the cached screencap to your SD card. This is implemented in this way to minimize interruption of gameplay.
The cache thread is housed on the APPCORE, so I can freeze the kernel while caching to eliminate any chance of accidentally grabbing images from different frames. The write thread is housed on CORE3, so that it can write to SD in the backround, without interrupting the running application or system calls for hundreds of ms.
THIS CODE DOES NOT WORK ON OLD 3DS because It uses CORE4, which is an extra CPU core only present on the new 3ds.
huge thanks to the creators of Luma3DS, whose work comprises the majority of this repository. The only real addition I made was datasetCapture.c and .h files in sysmodules/rosalina/includes and source.
assuming you have modded your 3ds according to this guide, simply go to releases (on the right side of the screen) and place the boot.firm in your root 3ds directory, replacing the one thats currently there. When you turn on the 3d slider to its maximum position, your 3ds will take screenshots every 3.5s. Don't open rosalina menu or your 3ds will crash. if you somehow found this repository and REALLY want to use this code, you can compile the boot.firm with the same instructions for compiling Luma3DS here
the current release (1.0) is based on Luma3DS V13.1.2