HTC Vive Tracker - Accessory Integration

Vive Tracker
Developer Guidelines
HTC Corporation 07/17/2017
V
er.
1.5
29
HTC Confidential and Proprietary
STM F4 series developer board:
Haptic value range: Vive Tracker receives haptic input value from the content, while the
POGO OUT pin sets an output of HIGH with the duration in ‘ms’.
Accessory integration
This section describes information on position transformation between an accessory and Vive
Tracker. Content developers can create the correct rotation and translation result of the
content used with the attached accessory in a game engine such as Unity.
It is assumed that the local coordinate system of the accessory is z-axis facing the front (left-
handed coordinate system), and Vive Tracker is attached in the accessory as in the example
below. Rotation degree and translation distance of an accessory relevant to Vive Tracker are
described in roll, yaw, pitch and D
x
, D
y
, D
z
respectively during the integration.
After the center of an accessory has been decided during the design, the following degrees
and distance of an accessory based on actual integration condition can be measured. For
detailed information regarding the center of the Vive Tracker, refer to guidelines related to the
hardware and mechanical design.
char buffer[64];
char *p_buffer = buffer;
unsigned int buffer_size = sizeof(buffer);
memset( (void *)p_buffer, 0, buffer_size );
p_buffer[0] = 0xB3; // Command
p_buffer[1] = 0x03; // Size of Data
p_buffer[2] = 0x03; // Host Type: ACCESSORY
p_buffer[3] = 0x01;
p_buffer[4] = 0x01;
// STM API
USBH_HID_SetReport(
handle,
0x03, // Feature Report
0,
(uint8_t *)p_buffer,
buffer_size );