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am 0c2227ab: Clean up in geometry_utils.h

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* commit '0c2227ab991774768414d8ea60a469f005eb9f1a':
  Clean up in geometry_utils.h
This commit is contained in:
Ken Wakasa 2013-01-20 19:48:41 -08:00 committed by Android Git Automerger
commit 9a2dffdbd1
7 changed files with 87 additions and 80 deletions
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2
native/jni/src/defines.h
View file

@ -392,6 +392,8 @@ static inline void prof_out(void) {
template<typename T> inline T min(T a, T b) { return a < b ? a : b; }
template<typename T> inline T max(T a, T b) { return a > b ? a : b; }
#define M_PI_F 3.14159265f
#define NELEMS(x) (sizeof(x) / sizeof((x)[0]))
// The ratio of neutral area radius to sweet spot radius.

57
native/jni/src/geometry_utils.h
View file

@ -21,7 +21,6 @@
#include "defines.h"
#define M_PI_F 3.14159265f
#define ROUND_FLOAT_10000(f) ((f) < 1000.0f && (f) > 0.001f) \
? (floorf((f) * 10000.0f) / 10000.0f) : (f)
@ -29,15 +28,6 @@ namespace latinime {
static inline float SQUARE_FLOAT(const float x) { return x * x; }
static inline float getSquaredDistanceFloat(const float x1, const float y1, const float x2,
const float y2) {
return SQUARE_FLOAT(x1 - x2) + SQUARE_FLOAT(y1 - y2);
}
static AK_FORCE_INLINE int getDistanceInt(const int x1, const int y1, const int x2, const int y2) {
return static_cast<int>(hypotf(static_cast<float>(x1 - x2), static_cast<float>(y1 - y2)));
}
static AK_FORCE_INLINE float getAngle(const int x1, const int y1, const int x2, const int y2) {
const int dx = x1 - x2;
const int dy = y1 - y2;
@ -54,52 +44,5 @@ static AK_FORCE_INLINE float getAngleDiff(const float a1, const float a2) {
}
return diff;
}
static inline float pointToLineSegSquaredDistanceFloat(const float x, const float y, const float x1,
const float y1, const float x2, const float y2, const bool extend) {
const float ray1x = x - x1;
const float ray1y = y - y1;
const float ray2x = x2 - x1;
const float ray2y = y2 - y1;
const float dotProduct = ray1x * ray2x + ray1y * ray2y;
const float lineLengthSqr = SQUARE_FLOAT(ray2x) + SQUARE_FLOAT(ray2y);
const float projectionLengthSqr = dotProduct / lineLengthSqr;
float projectionX;
float projectionY;
if (!extend && projectionLengthSqr < 0.0f) {
projectionX = x1;
projectionY = y1;
} else if (!extend && projectionLengthSqr > 1.0f) {
projectionX = x2;
projectionY = y2;
} else {
projectionX = x1 + projectionLengthSqr * ray2x;
projectionY = y1 + projectionLengthSqr * ray2y;
}
return getSquaredDistanceFloat(x, y, projectionX, projectionY);
}
// Normal distribution N(u, sigma^2).
struct NormalDistribution {
public:
NormalDistribution(const float u, const float sigma)
: mU(u), mSigma(sigma),
mPreComputedNonExpPart(1.0f / sqrtf(2.0f * M_PI_F * SQUARE_FLOAT(sigma))),
mPreComputedExponentPart(-1.0f / (2.0f * SQUARE_FLOAT(sigma))) {}
float getProbabilityDensity(const float x) const {
const float shiftedX = x - mU;
return mPreComputedNonExpPart * expf(mPreComputedExponentPart * SQUARE_FLOAT(shiftedX));
}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(NormalDistribution);
const float mU; // mean value
const float mSigma; // standard deviation
const float mPreComputedNonExpPart; // = 1 / sqrt(2 * PI * sigma^2)
const float mPreComputedExponentPart; // = -1 / (2 * sigma^2)
}; // struct NormalDistribution
} // namespace latinime
#endif // LATINIME_GEOMETRY_UTILS_H

5
native/jni/src/proximity_info.cpp
View file

@ -140,7 +140,8 @@ float ProximityInfo::getNormalizedSquaredDistanceFromCenterFloatG(
const float touchX = static_cast<float>(x);
const float touchY = static_cast<float>(y);
const float keyWidth = static_cast<float>(getMostCommonKeyWidth());
return getSquaredDistanceFloat(centerX, centerY, touchX, touchY) / SQUARE_FLOAT(keyWidth);
return ProximityInfoUtils::getSquaredDistanceFloat(centerX, centerY, touchX, touchY)
/ SQUARE_FLOAT(keyWidth);
}
int ProximityInfo::getCodePointOf(const int keyIndex) const {
@ -163,7 +164,7 @@ void ProximityInfo::initializeG() {
for (int i = 0; i < KEY_COUNT; i++) {
mKeyKeyDistancesG[i][i] = 0;
for (int j = i + 1; j < KEY_COUNT; j++) {
mKeyKeyDistancesG[i][j] = getDistanceInt(
mKeyKeyDistancesG[i][j] = ProximityInfoUtils::getDistanceInt(
mCenterXsG[i], mCenterYsG[i], mCenterXsG[j], mCenterYsG[j]);
mKeyKeyDistancesG[j][i] = mKeyKeyDistancesG[i][j];
}

4
native/jni/src/proximity_info.h
View file

@ -71,10 +71,6 @@ class ProximityInfo {
return MOST_COMMON_KEY_WIDTH_SQUARE;
}
const char *getLocaleStr() const {
return mLocaleStr;
}
int getKeyCount() const {
return KEY_COUNT;
}

33
native/jni/src/proximity_info_state.cpp
View file

@ -23,6 +23,7 @@
#include "geometry_utils.h"
#include "proximity_info.h"
#include "proximity_info_state.h"
#include "proximity_info_utils.h"
namespace latinime {
@ -46,7 +47,6 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
mProximityInfo = proximityInfo;
mHasTouchPositionCorrectionData = proximityInfo->hasTouchPositionCorrectionData();
mMostCommonKeyWidthSquare = proximityInfo->getMostCommonKeyWidthSquare();
mLocaleStr = proximityInfo->getLocaleStr();
mKeyCount = proximityInfo->getKeyCount();
mCellHeight = proximityInfo->getCellHeight();
mCellWidth = proximityInfo->getCellWidth();
@ -324,7 +324,7 @@ void ProximityInfoState::refreshSpeedRates(const int inputSize, const int *const
if (i < mSampledInputSize - 1 && j >= mInputIndice[i + 1]) {
break;
}
length += getDistanceInt(xCoordinates[j], yCoordinates[j],
length += ProximityInfoUtils::getDistanceInt(xCoordinates[j], yCoordinates[j],
xCoordinates[j + 1], yCoordinates[j + 1]);
duration += times[j + 1] - times[j];
}
@ -333,7 +333,7 @@ void ProximityInfoState::refreshSpeedRates(const int inputSize, const int *const
break;
}
// TODO: use mLengthCache instead?
length += getDistanceInt(xCoordinates[j], yCoordinates[j],
length += ProximityInfoUtils::getDistanceInt(xCoordinates[j], yCoordinates[j],
xCoordinates[j + 1], yCoordinates[j + 1]);
duration += times[j + 1] - times[j];
}
@ -388,7 +388,8 @@ float ProximityInfoState::calculateBeelineSpeedRate(
while (start > 0 && tempBeelineDistance < lookupRadius) {
tempTime += times[start] - times[start - 1];
--start;
tempBeelineDistance = getDistanceInt(x0, y0, xCoordinates[start], yCoordinates[start]);
tempBeelineDistance = ProximityInfoUtils::getDistanceInt(x0, y0, xCoordinates[start],
yCoordinates[start]);
}
// Exclusive unless this is an edge point
if (start > 0 && start < actualInputIndex) {
@ -401,7 +402,8 @@ float ProximityInfoState::calculateBeelineSpeedRate(
while (end < (inputSize - 1) && tempBeelineDistance < lookupRadius) {
tempTime += times[end + 1] - times[end];
++end;
tempBeelineDistance = getDistanceInt(x0, y0, xCoordinates[end], yCoordinates[end]);
tempBeelineDistance = ProximityInfoUtils::getDistanceInt(x0, y0, xCoordinates[end],
yCoordinates[end]);
}
// Exclusive unless this is an edge point
if (end > actualInputIndex && end < (inputSize - 1)) {
@ -419,7 +421,7 @@ float ProximityInfoState::calculateBeelineSpeedRate(
const int y2 = yCoordinates[start];
const int x3 = xCoordinates[end];
const int y3 = yCoordinates[end];
const int beelineDistance = getDistanceInt(x2, y2, x3, y3);
const int beelineDistance = ProximityInfoUtils::getDistanceInt(x2, y2, x3, y3);
int adjustedStartTime = times[start];
if (start == 0 && actualInputIndex == 0 && inputSize > 1) {
adjustedStartTime += FIRST_POINT_TIME_OFFSET_MILLIS;
@ -539,7 +541,8 @@ float ProximityInfoState::getPointScore(
}
const int baseSampleRate = mProximityInfo->getMostCommonKeyWidth();
const int distPrev = getDistanceInt(mSampledInputXs.back(), mSampledInputYs.back(),
const int distPrev = ProximityInfoUtils::getDistanceInt(
mSampledInputXs.back(), mSampledInputYs.back(),
mSampledInputXs[size - 2], mSampledInputYs[size - 2]) * DISTANCE_BASE_SCALE;
float score = 0.0f;
@ -590,13 +593,15 @@ bool ProximityInfoState::pushTouchPoint(const int inputIndex, const int nodeCode
}
// Check if the last point should be skipped.
if (isLastPoint && size > 0) {
if (getDistanceInt(x, y, mSampledInputXs.back(), mSampledInputYs.back())
* LAST_POINT_SKIP_DISTANCE_SCALE < mProximityInfo->getMostCommonKeyWidth()) {
if (ProximityInfoUtils::getDistanceInt(x, y, mSampledInputXs.back(),
mSampledInputYs.back()) * LAST_POINT_SKIP_DISTANCE_SCALE
< mProximityInfo->getMostCommonKeyWidth()) {
// This point is not used because it's too close to the previous point.
if (DEBUG_GEO_FULL) {
AKLOGI("p0: size = %zd, x = %d, y = %d, lx = %d, ly = %d, dist = %d, "
"width = %d", size, x, y, mSampledInputXs.back(), mSampledInputYs.back(),
getDistanceInt(x, y, mSampledInputXs.back(), mSampledInputYs.back()),
ProximityInfoUtils::getDistanceInt(x, y, mSampledInputXs.back(),
mSampledInputYs.back()),
mProximityInfo->getMostCommonKeyWidth()
/ LAST_POINT_SKIP_DISTANCE_SCALE);
}
@ -616,7 +621,7 @@ bool ProximityInfoState::pushTouchPoint(const int inputIndex, const int nodeCode
// Pushing point information.
if (size > 0) {
mLengthCache.push_back(
mLengthCache.back() + getDistanceInt(
mLengthCache.back() + ProximityInfoUtils::getDistanceInt(
x, y, mSampledInputXs.back(), mSampledInputYs.back()));
} else {
mLengthCache.push_back(0);
@ -867,7 +872,8 @@ float ProximityInfoState::getLineToKeyDistance(
const int keyX = mProximityInfo->getKeyCenterXOfKeyIdG(keyId);
const int keyY = mProximityInfo->getKeyCenterYOfKeyIdG(keyId);
return pointToLineSegSquaredDistanceFloat(keyX, keyY, x0, y0, x1, y1, extend);
return ProximityInfoUtils::pointToLineSegSquaredDistanceFloat(
keyX, keyY, x0, y0, x1, y1, extend);
}
// Updates probabilities of aligning to some keys and skipping.
@ -986,7 +992,8 @@ void ProximityInfoState::updateAlignPointProbabilities(const int start) {
MAX_SPEEDxNEAREST_RATE_FOR_STANDERD_DIVIATION);
const float sigma = speedxAngleRate + speedxNearestKeyDistanceRate + MIN_STANDERD_DIVIATION;
NormalDistribution distribution(CENTER_VALUE_OF_NORMALIZED_DISTRIBUTION, sigma);
ProximityInfoUtils::NormalDistribution
distribution(CENTER_VALUE_OF_NORMALIZED_DISTRIBUTION, sigma);
static const float PREV_DISTANCE_WEIGHT = 0.5f;
static const float NEXT_DISTANCE_WEIGHT = 0.6f;
// Summing up probability densities of all near keys.

4
native/jni/src/proximity_info_state.h
View file

@ -19,7 +19,6 @@
#include <bitset>
#include <cstring> // for memset()
#include <string>
#include <vector>
#include "char_utils.h"
@ -55,7 +54,7 @@ class ProximityInfoState {
/////////////////////////////////////////
AK_FORCE_INLINE ProximityInfoState()
: mProximityInfo(0), mMaxPointToKeyLength(0.0f), mAverageSpeed(0.0f),
mHasTouchPositionCorrectionData(false), mMostCommonKeyWidthSquare(0), mLocaleStr(),
mHasTouchPositionCorrectionData(false), mMostCommonKeyWidthSquare(0),
mKeyCount(0), mCellHeight(0), mCellWidth(0), mGridHeight(0), mGridWidth(0),
mIsContinuationPossible(false), mSampledInputXs(), mSampledInputYs(), mTimes(),
mInputIndice(), mLengthCache(), mBeelineSpeedPercentiles(), mDistanceCache_G(),
@ -262,7 +261,6 @@ class ProximityInfoState {
float mAverageSpeed;
bool mHasTouchPositionCorrectionData;
int mMostCommonKeyWidthSquare;
std::string mLocaleStr;
int mKeyCount;
int mCellHeight;
int mCellWidth;

62
native/jni/src/proximity_info_utils.h
View file

@ -17,9 +17,12 @@
#ifndef LATINIME_PROXIMITY_INFO_UTILS_H
#define LATINIME_PROXIMITY_INFO_UTILS_H
#include <cmath>
#include "additional_proximity_chars.h"
#include "char_utils.h"
#include "defines.h"
#include "geometry_utils.h"
#include "hash_map_compat.h"
namespace latinime {
@ -78,12 +81,69 @@ class ProximityInfoUtils {
}
}
AK_FORCE_INLINE static int getStartIndexFromCoordinates(const int maxProximityCharsSize,
static AK_FORCE_INLINE int getStartIndexFromCoordinates(const int maxProximityCharsSize,
const int x, const int y, const int cellHeight, const int cellWidth,
const int gridWidth) {
return ((y / cellHeight) * gridWidth + (x / cellWidth)) * maxProximityCharsSize;
}
static inline float getSquaredDistanceFloat(const float x1, const float y1, const float x2,
const float y2) {
return SQUARE_FLOAT(x1 - x2) + SQUARE_FLOAT(y1 - y2);
}
static AK_FORCE_INLINE int getDistanceInt(const int x1, const int y1, const int x2,
const int y2) {
return static_cast<int>(hypotf(static_cast<float>(x1 - x2), static_cast<float>(y1 - y2)));
}
static inline float pointToLineSegSquaredDistanceFloat(const float x, const float y,
const float x1, const float y1, const float x2, const float y2, const bool extend) {
const float ray1x = x - x1;
const float ray1y = y - y1;
const float ray2x = x2 - x1;
const float ray2y = y2 - y1;
const float dotProduct = ray1x * ray2x + ray1y * ray2y;
const float lineLengthSqr = SQUARE_FLOAT(ray2x) + SQUARE_FLOAT(ray2y);
const float projectionLengthSqr = dotProduct / lineLengthSqr;
float projectionX;
float projectionY;
if (!extend && projectionLengthSqr < 0.0f) {
projectionX = x1;
projectionY = y1;
} else if (!extend && projectionLengthSqr > 1.0f) {
projectionX = x2;
projectionY = y2;
} else {
projectionX = x1 + projectionLengthSqr * ray2x;
projectionY = y1 + projectionLengthSqr * ray2y;
}
return getSquaredDistanceFloat(x, y, projectionX, projectionY);
}
// Normal distribution N(u, sigma^2).
struct NormalDistribution {
public:
NormalDistribution(const float u, const float sigma)
: mU(u), mSigma(sigma),
mPreComputedNonExpPart(1.0f / sqrtf(2.0f * M_PI_F * SQUARE_FLOAT(sigma))),
mPreComputedExponentPart(-1.0f / (2.0f * SQUARE_FLOAT(sigma))) {}
float getProbabilityDensity(const float x) const {
const float shiftedX = x - mU;
return mPreComputedNonExpPart * expf(mPreComputedExponentPart * SQUARE_FLOAT(shiftedX));
}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(NormalDistribution);
const float mU; // mean value
const float mSigma; // standard deviation
const float mPreComputedNonExpPart; // = 1 / sqrt(2 * PI * sigma^2)
const float mPreComputedExponentPart; // = -1 / (2 * sigma^2)
}; // struct NormalDistribution
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(ProximityInfoUtils);