nyancrimew
/
LatinIME
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Merge "Remove hack algorithm from GestureStroke" into jb-mr1-dev

main
Tadashi G. Takaoka 2012-09-19 00:33:16 -07:00 committed by Android (Google) Code Review
parent 65feee12e5 f501e4dbd2
commit a8dc30e6d7
1 changed files with 0 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
java/src/com/android/inputmethod/keyboard/internal/GestureStroke.java
View File

@ -25,7 +25,6 @@ public class GestureStroke {
private final ResizableIntArray mXCoordinates = new ResizableIntArray(DEFAULT_CAPACITY); private final ResizableIntArray mXCoordinates = new ResizableIntArray(DEFAULT_CAPACITY);
private final ResizableIntArray mYCoordinates = new ResizableIntArray(DEFAULT_CAPACITY); private final ResizableIntArray mYCoordinates = new ResizableIntArray(DEFAULT_CAPACITY);
private float mLength; private float mLength;
private float mAngle;
private int mIncrementalRecognitionSize; private int mIncrementalRecognitionSize;
private int mLastIncrementalBatchSize; private int mLastIncrementalBatchSize;
private long mLastPointTime; private long mLastPointTime;
@ -40,9 +39,6 @@ public class GestureStroke {
private static final int MIN_GESTURE_DURATION = 100; // msec private static final int MIN_GESTURE_DURATION = 100; // msec
private static final float MIN_GESTURE_SAMPLING_RATIO_TO_KEY_WIDTH = 1.0f / 6.0f; private static final float MIN_GESTURE_SAMPLING_RATIO_TO_KEY_WIDTH = 1.0f / 6.0f;
private static final float GESTURE_RECOG_SPEED_THRESHOLD = 0.4f; // dip/msec private static final float GESTURE_RECOG_SPEED_THRESHOLD = 0.4f; // dip/msec
private static final float GESTURE_RECOG_CURVATURE_THRESHOLD = (float)(Math.PI / 4.0f);
private static final float DOUBLE_PI = (float)(2.0f * Math.PI);
public GestureStroke(final int pointerId) { public GestureStroke(final int pointerId) {
mPointerId = pointerId; mPointerId = pointerId;
@ -62,7 +58,6 @@ public class GestureStroke {
public void reset() { public void reset() {
mLength = 0; mLength = 0;
mAngle = 0;
mIncrementalRecognitionSize = 0; mIncrementalRecognitionSize = 0;
mLastIncrementalBatchSize = 0; mLastIncrementalBatchSize = 0;
mLastPointTime = 0; mLastPointTime = 0;
@ -97,16 +92,6 @@ public class GestureStroke {
mXCoordinates.add(x); mXCoordinates.add(x);
mYCoordinates.add(y); mYCoordinates.add(y);
mLength += dist; mLength += dist;
final float angle = getAngle(lastX, lastY, x, y);
if (size > 1) {
final float curvature = getAngleDiff(angle, mAngle);
if (curvature > GESTURE_RECOG_CURVATURE_THRESHOLD) {
if (size > mIncrementalRecognitionSize) {
mIncrementalRecognitionSize = size;
}
}
}
mAngle = angle;
} }
if (!isHistorical) { if (!isHistorical) {
@ -146,21 +131,4 @@ public class GestureStroke {
// java.lang.Math due to the way the JIT optimizes java.lang.Math. // java.lang.Math due to the way the JIT optimizes java.lang.Math.
return (float)Math.sqrt(dx * dx + dy * dy); return (float)Math.sqrt(dx * dx + dy * dy);
} }
private static float getAngle(final int x1, final int y1, final int x2, final int y2) {
final int dx = x1 - x2;
final int dy = y1 - y2;
if (dx == 0 && dy == 0) return 0;
// Would it be faster to call atan2f() directly via JNI? Not sure about what the JIT
// does with Math.atan2().
return (float)Math.atan2(dy, dx);
}
private static float getAngleDiff(final float a1, final float a2) {
final float diff = Math.abs(a1 - a2);
if (diff > Math.PI) {
return DOUBLE_PI - diff;
}
return diff;
}
} }