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added comments to explain hand state

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This commit is contained in:
ZappoMan 2014-12-19 10:01:14 -08:00
parent 821cbe610c
commit dd06d1f4a9
2 changed files with 18 additions and 1 deletions
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7
libraries/avatars/src/AvatarData.cpp
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@ -443,7 +443,14 @@ int AvatarData::parseDataAtOffset(const QByteArray& packet, int offset) {
// key state, stored as a semi-nibble in the bitItems
_keyState = (KeyState)getSemiNibbleAt(bitItems,KEY_STATE_START_BIT);
// hand state, stored as a semi-nibble plus a bit in the bitItems
// we store the hand state as well as other items in a shared bitset. The hand state is an octal, but is split
// into two sections to maintain backward compatibility. The bits are ordered as such (0-7 left to right).
// +---+-----+-----+--+
// |x,x|H0,H1|x,x,x|H2|
// +---+-----+-----+--+
// Hand state - H0,H1,H2 is found in the 3rd, 4th, and 8th bits
_handState = getSemiNibbleAt(bitItems, HAND_STATE_START_BIT)
+ (oneAtBit(bitItems, HAND_STATE_FINGER_POINTING_BIT) ? IS_FINGER_POINTING_FLAG : 0);

12
libraries/avatars/src/AvatarData.h
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@ -76,7 +76,17 @@ const quint32 AVATAR_MOTION_SCRIPTABLE_BITS =
AVATAR_MOTION_STAND_ON_NEARBY_FLOORS;
// First bitset
// Bitset of state flags - we store the key state, hand state, faceshift, chat circling, and existance of
// referential data in this bit set. The hand state is an octal, but is split into two sections to maintain
// backward compatibility. The bits are ordered as such (0-7 left to right).
// +-----+-----+-+-+-+--+
// |K0,K1|H0,H1|F|C|R|H2|
// +-----+-----+-+-+-+--+
// Key state - K0,K1 is found in the 1st and 2nd bits
// Hand state - H0,H1,H2 is found in the 3rd, 4th, and 8th bits
// Faceshift - F is found in the 5th bit
// Chat Circling - C is found in the 6th bit
// Referential Data - R is found in the 7th bit
const int KEY_STATE_START_BIT = 0; // 1st and 2nd bits
const int HAND_STATE_START_BIT = 2; // 3rd and 4th bits
const int IS_FACESHIFT_CONNECTED = 4; // 5th bit