Differences

This shows you the differences between two versions of the page.

--- project:arvr [2014/05/22 19:48] – lexik
+++ project:arvr:start [2016/11/28 01:55] (current) – ruza
@@ Line 1: / Line 1: @@
+====== Augmented/Virtual Reality ======
+{{template>project:infobox|
+name=Augmented/Virtual Reality|
+image=vr.png?200|
+sw=?|
+hw=?|
+founder=[[user:stick]]|
+interested=[[user:biiter]],\\ [[user:tomsuch]],\\ [[user:ruza]],\\ [[user:aym]],\\ [[user:lexik]]|
+status=suspended}}
+~~META:
+status = suspended
+&relation firstimage = :project:vr.png
+~~
+We have [[http://www.vuzix.com/consumer/products_vr920.html|Vuzix iWear VR920]] and shutter glasses available for projects.
+===== Ideas =====
+  * Depth Perception
+    * http://xkcd.com/941/
+  * Kinect + VR
+    * http://www.engadget.com/2010/12/21/kinect-paired-with-vuzix-vr920-shades-creates-zany-virtual-real/
+  * Plane Model + Cam
+    * http://www.autoblog.com/2011/08/31/r-c-f16-jet-with-swiveling-pilots-view-blows-our-tiny-little-mi/
+  * Wireless Head Mounted Display
+    * http://www.pabr.org/wxhmd/doc/wxhmd.en.html
+===== 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) ===
+<code>
+# modprobe i2c-dev
+$ i2cdetect -l
+$ cat /sys/bus/i2c/devices/i2c-X/device/device/card0-VGA-1/edid
+</code>
+=== reference ===
+  * [[http://www.hardwarebook.info/VGA_(VESA_DDC)|VGA (VESA DDC)]]
+  * [[http://jaffar.cs.msu.su/oleg/ddcci/|Linux DDC/CI Tool page]]
+  * [[https://xgoat.com/wp/2007/11/11/using-i2c-from-userspace-in-linux/|Using I2C from userspace in Linux]]
+==== 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.
+<code>
+    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
+</code>
+Ovladani displayu probiha na EP 5 OUT (0x05).
+Inicializace se provadi zpravou typu [[http://www.beyondlogic.org/usbnutshell/usb6.shtml#SetupPacket|control transfer]] v nasledujicim nastaveni:
+<code>
+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
+</code>
+Kompletni inizializace zarizeni a ovladani leveho/praveho oka v PyUSB:
+<code>
+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")
+</code>
+Obraz je v displayi udrzovan dokud mu neprijde zprava o jeho obnoveni (0x00/0x01).
+===== Anaglyph =====
+[[wp>Anaglyph_image]]
+==== Inficolor ====
+[[https://www.youtube.com/watch?v=2cJ1KCTem9o]]
+===== Theory =====
+[[http://paulbourke.net/miscellaneous/stereographics/stereorender/|Paul Bourke's stereoscopic articles]]