Using processing for the HTC Vive

donzilll · November 20, 2018, 2:32pm

Hello everyone,

I have a HTC Vive and am interested in creating processing sketches to use in VR.
I found a great library that does exactly that:

It has been great so far but I found have found it be quite limited with a lot less code than I would have expected.
What I want to do in the HTC Vive is to use a barrel distortion so I can fix the pincushion distortion vr devices have. Here is a link to what I mean:
http://msl.cs.uiuc.edu/vr/node208.html
And a solution to lens distortion:

I have found another library that uses the barrel distortion - Camera3D

github.com

hx2A/Camera3D/blob/master/src/camera3D/generators/BarrelDistortionGenerator.java

package camera3D.generators;

import camera3D.generators.StereoscopicGenerator;

/**
 * Optimized implementation of the barrel distortion algorithm.
 * 
 * Builds a lookup table to map pixels in sketch to the distorted view that will
 * be countered by the lenses.
 * 
 * Defaults to settings for an Oculus Rift's lenses.
 * 
 * Much thanks to this guy for explaining barrel distortion:
 * 
 * https://www.youtube.com/watch?v=B7qrgrrHry0
 * 
 * And to this guy for pointing out that the radius (r) must be normalized:
 * 
 * http://stackoverflow.com/questions/28130618/what-ist-the-correct-oculus-rift-
 * barrel-distortion-radius-function

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However this can only be used for the Oculus Rift and Google cardboard, and both Camera3D and Vive.p5 librarys wont work together as they both need to control the camera.

So from what I have researched this problem has not been done on the HTC Vive yet in processing.
I am not an expert in processing so any help or direction on how to implement this barrel distortion would be great!

I also found the display code for the HTC Vive, which may help:

github.com

OSVR/OSVR-Vive/blob/master/displays/HTC_Vive.json

{
   "hmd" : {
      "device" : {
         "Note" : "This is a sample descriptor file only - please follow the instructions to use the ViveDisplayExtractor to generate a correct one for your device!",
         "Version" : "",
         "model" : "Vive/Vive PRE",
         "vendor" : "HTC"
      },
      "distortion" : {
         "rgb_point_samples_external_file" : "HTC_Vive_meshdata.json"
      },
      "eyes" : [
         {
            "center_proj_x" : 0.54053610563278198,
            "center_proj_y" : 0.49780362844467163
         },
         {
            "center_proj_x" : 0.44958537817001343,
            "center_proj_y" : 0.4974265992641449
         }

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Kevin · November 20, 2018, 7:55pm

If you post your question to multiple sites, please link between the posts.

This question has also been asked here:

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Using processing for the HTC Vive

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