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am b85df9d5: Merge "Fix bug of sampling and become to save corner points for geometric input." into jb-mr1-dev

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* commit 'b85df9d5effa7c2854ba51c7a5bbd7460d16069b':
  Fix bug of sampling and become to save corner points for geometric input.
This commit is contained in:
Ken Wakasa 2012-09-07 00:05:01 -07:00 committed by Android Git Automerger
commit f2f61162e5
1 changed files with 24 additions and 15 deletions
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31
native/jni/src/proximity_info_state.cpp
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@ -224,7 +224,7 @@ float ProximityInfoState::updateNearKeysDistances(const int x, const int y,
bool ProximityInfoState::isPrevLocalMin(const NearKeysDistanceMap *const currentNearKeysDistances, bool ProximityInfoState::isPrevLocalMin(const NearKeysDistanceMap *const currentNearKeysDistances,
const NearKeysDistanceMap *const prevNearKeysDistances, const NearKeysDistanceMap *const prevNearKeysDistances,
const NearKeysDistanceMap *const prevPrevNearKeysDistances) const { const NearKeysDistanceMap *const prevPrevNearKeysDistances) const {
static const float MARGIN = 0.05f; static const float MARGIN = 0.01f;
for (NearKeysDistanceMap::const_iterator it = prevNearKeysDistances->begin(); for (NearKeysDistanceMap::const_iterator it = prevNearKeysDistances->begin();
it != prevNearKeysDistances->end(); ++it) { it != prevNearKeysDistances->end(); ++it) {
@ -245,16 +245,19 @@ float ProximityInfoState::getPointScore(
const NearKeysDistanceMap *const prevNearKeysDistances, const NearKeysDistanceMap *const prevNearKeysDistances,
const NearKeysDistanceMap *const prevPrevNearKeysDistances) const { const NearKeysDistanceMap *const prevPrevNearKeysDistances) const {
static const float BASE_SAMPLE_RATE_SCALE = 0.1f; static const float BASE_SAMPLE_RATE_SCALE = 0.1f;
static const float SAVE_DISTANCE_SCALE = 14.0f; static const float SAVE_DISTANCE_SCALE = 20.0f;
static const float SAVE_DISTANCE_SCORE = 2.0f; static const float SAVE_DISTANCE_SCORE = 2.0f;
static const float SKIP_DISTANCE_SCALE = 1.5f; static const float SKIP_DISTANCE_SCALE = 2.5f;
static const float SKIP_DISTANCE_SCORE = -1.0f; static const float SKIP_DISTANCE_SCORE = -1.0f;
static const float CHECK_LOCALMIN_DISTANCE_THRESHOLD_SCALE = 3.5f; static const float CHECK_LOCALMIN_DISTANCE_THRESHOLD_SCALE = 4.0f;
static const float CHECK_LOCALMIN_DISTANCE_SCORE = -1.0f; static const float CHECK_LOCALMIN_DISTANCE_SCORE = -1.0f;
static const float STRAIGHT_ANGLE_THRESHOLD = M_PI_F / 32.0f; static const float STRAIGHT_ANGLE_THRESHOLD = M_PI_F / 36.0f;
static const float STRAIGHT_SKIP_DISTANCE_THRESHOLD_SCALE = 5.0f; static const float STRAIGHT_SKIP_DISTANCE_THRESHOLD_SCALE = 5.0f;
static const float STRAIGHT_SKIP_NEAREST_DISTANCE_THRESHOLD = 0.5f; static const float STRAIGHT_SKIP_NEAREST_DISTANCE_THRESHOLD = 0.5f;
static const float STRAIGHT_SKIP_SCORE = -1.0f; static const float STRAIGHT_SKIP_SCORE = -1.0f;
static const float CORNER_ANGLE_THRESHOLD = M_PI_F / 2.0f;
static const float CORNER_CHECK_DISTANCE_THRESHOLD_SCALE = 2.7f;
static const float CORNER_SCORE = 1.0f;
const std::size_t size = mInputXs.size(); const std::size_t size = mInputXs.size();
if (size <= 1) { if (size <= 1) {
@ -276,20 +279,26 @@ float ProximityInfoState::getPointScore(
} }
// Location // Location
if (distPrev < baseSampleRate * CHECK_LOCALMIN_DISTANCE_THRESHOLD_SCALE) { if (distPrev < baseSampleRate * CHECK_LOCALMIN_DISTANCE_THRESHOLD_SCALE) {
if (!isPrevLocalMin(currentNearKeysDistances, currentNearKeysDistances, if (!isPrevLocalMin(currentNearKeysDistances, prevNearKeysDistances,
prevPrevNearKeysDistances)) { prevPrevNearKeysDistances)) {
score += CHECK_LOCALMIN_DISTANCE_SCORE; score += CHECK_LOCALMIN_DISTANCE_SCORE;
} }
} }
// Angle // Angle
if (nearest > STRAIGHT_SKIP_NEAREST_DISTANCE_THRESHOLD
&& distPrev < baseSampleRate * STRAIGHT_SKIP_DISTANCE_THRESHOLD_SCALE) {
const float angle1 = getAngle(x, y, mInputXs.back(), mInputYs.back()); const float angle1 = getAngle(x, y, mInputXs.back(), mInputYs.back());
const float angle2 = getAngle(mInputXs.back(), mInputYs.back(), const float angle2 = getAngle(mInputXs.back(), mInputYs.back(),
mInputXs[size - 2], mInputYs[size - 2]); mInputXs[size - 2], mInputYs[size - 2]);
if (getAngleDiff(angle1, angle2) < STRAIGHT_ANGLE_THRESHOLD) { const float angleDiff = getAngleDiff(angle1, angle2);
// Skip straight
if (nearest > STRAIGHT_SKIP_NEAREST_DISTANCE_THRESHOLD
&& distPrev < baseSampleRate * STRAIGHT_SKIP_DISTANCE_THRESHOLD_SCALE
&& angleDiff < STRAIGHT_ANGLE_THRESHOLD) {
score += STRAIGHT_SKIP_SCORE; score += STRAIGHT_SKIP_SCORE;
} }
// Save corner
if (distPrev > baseSampleRate * CORNER_CHECK_DISTANCE_THRESHOLD_SCALE
&& angleDiff > CORNER_ANGLE_THRESHOLD) {
score += CORNER_SCORE;
} }
return score; return score;
} }
@ -447,9 +456,9 @@ int32_t ProximityInfoState::getAllPossibleChars(
float ProximityInfoState::getAveragePointDuration() const { float ProximityInfoState::getAveragePointDuration() const {
if (mInputSize == 0) { if (mInputSize == 0) {
return 0; return 0.0f;
} }
return (mTimes[mInputSize - 1] - mTimes[0]) / static_cast<float>(mInputSize); return static_cast<float>(mTimes[mInputSize - 1] - mTimes[0]) / static_cast<float>(mInputSize);
} }
} // namespace latinime } // namespace latinime