Augmented/Virtual Reality

Augmented/Virtual Reality
founder: stick
depends on:
interested: biiter,
tomsuch,
ruza,
aym
software license: ?
hardware license: ?
status: planned

We have Vuzix iWear VR920 and shutter glasses available for projects.

Ideas

Driver

eDimensional

Edimensional controller se inicializuje barevnyma kodoma v horni casti obrazovky. Kody se zjisti z programu E-D.exe na adrese 0x004010A9. Program si uklada nastaveni do registru v rutine na adrese 0x00401491.

Aktivace synchronizace LEFT/RIGHT obrazu se signalizuje pres DDC na VGA konektoru.

sprovozneni pod linuxem (incomplete)

# modprobe i2c-dev
$ i2cdetect -l
$ cat /sys/bus/i2c/devices/i2c-X/device/device/card0-VGA-1/edid

reference

Vuzix vr920

Bryle se ovladaji pres USB. USB descriptor zarizeni obsahuje krome audio kanalu a headtracking sensoru jeste display controller kterym lze prepinat obraz na levem a pravem oku.

    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        4
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              4 VR920 3D Stereo Control
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval               1

Ovladani displayu probiha na EP 5 OUT (0x05). Inicializace se provadi zpravou typu control transfer v nasledujicim nastaveni:

bmRequestType   0x40
bRequest        0x0009
wValue          0x0302
wIndex          0x0003
wLength         0x0010
data            0x02 0x07 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

Kompletni inizializace zarizeni a ovladani leveho/praveho oka v PyUSB:

import usb

# nalezeni zarizeni
dev = usb.core.find(idVendor = 0x1bae, idProduct = 0x0002)
if dev is None:
  raise ValueError('Device not found')

for i in range(4):
  try:
    dev.detach_kernel_driver(i)
    dev.detach_kernel_head(i)
  except:
    pass

# nalezeni EP 5 OUT
epx = None
dev.set_configuration(1)
for cfg in dev:
  for intf in cfg:
    for ep in intf:
      if ep.bEndpointAddress is 0x05 :
        epx = ep

if epx is None:
  raise ValueError('ep not found')

# inicializace
dev.ctrl_transfer(0x40, 0x9, 0x302, 0x3, "\x02\x07\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00")
dev.ctrl_transfer(0x40, 0x9, 0x302, 0x3, "\x02\x07\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00")
epx.write("\x00")
dev.ctrl_transfer(0x40, 0x9, 0x302, 0x3, "\x02\x07\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00")

# ovladani displayu
epx.write("\x00")
epx.write("\x01")

Obraz je v displayi udrzovan dokud mu neprijde zprava o jeho obnoveni (0x00/0x01).

Anaglyph

Inficolor

Theory

 
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