myo
Version:
Javascript bindings for Myo
115 lines • 3.47 kB
JavaScript
-- (NSString *)classifySnap:(NSArray *)data hardwareRevision:(NSNumber *)hardwareRevision {
- int sscX = 0;
- int sscY = 0;
- int sscZ = 0;
-
- int maxSscX = 0;
- int maxSscY = 0;
- int maxSscZ = 0;
-
- double peakDiffX = 0;
- double peakDiffY = 0;
- double peakDiffZ = 0;
-
- double maxPeakDiffX = 0;
- double maxPeakDiffY = 0;
- double maxPeakDiffZ = 0;
-
- //double blipThreshold = -0.244140625;
- double blipThreshold = -0.061035156;
-
- // For Rev D devices, increase blip threshold.
- if ([hardwareRevision unsignedShortValue] == 2) {
- blipThreshold *= 2;
- }
-
- TLMAccelerometerEvent *accel = data[0];
- double maxX = accel.vector.x;
- double maxY = accel.vector.y;
- double maxZ = accel.vector.z;
- double minX = accel.vector.x;
- double minY = accel.vector.y;
- double minZ = accel.vector.z;
-
- for (int i = 1; i < data.count - 1; i++) {
- TLMAccelerometerEvent *currentAccel = data[i];
- TLMAccelerometerEvent *prevAccel = data[i - 1];
- TLMAccelerometerEvent *nextAccel = data[i + 1];
-
- if (((currentAccel.vector.x -
- prevAccel.vector.x) * (nextAccel.vector.x - currentAccel.vector.x)) <
- blipThreshold) {
- sscX++;
- }
- if (((currentAccel.vector.y -
- prevAccel.vector.y) * (nextAccel.vector.y - currentAccel.vector.y)) <
- blipThreshold) {
- sscY++;
- }
- if (((currentAccel.vector.z -
- prevAccel.vector.z) * (nextAccel.vector.z - currentAccel.vector.z)) <
- blipThreshold) {
- sscZ++;
- }
-
- if (currentAccel.vector.x > maxX) {
- maxX = currentAccel.vector.x;
- }
- if (currentAccel.vector.y > maxY) {
- maxY = currentAccel.vector.y;
- }
- if (currentAccel.vector.z > maxZ) {
- maxZ = currentAccel.vector.z;
- }
-
- if (currentAccel.vector.x < minX) {
- minX = currentAccel.vector.x;
- }
- if (currentAccel.vector.y < minY) {
- minY = currentAccel.vector.y;
- }
- if (currentAccel.vector.z < minZ) {
- minZ = currentAccel.vector.z;
- }
- }
-
- if (sscX > maxSscX) {
- maxSscX = sscX;
- }
- if (sscY > maxSscY) {
- maxSscY = sscY;
- }
- if (sscZ > maxSscZ) {
- maxSscZ = sscZ;
- }
-
- peakDiffX = maxX - minX;
- peakDiffY = maxY - minY;
- peakDiffZ = maxZ - minZ;
-
- if (peakDiffX > maxPeakDiffX) {
- maxPeakDiffX = peakDiffX;
- }
- if (peakDiffY > maxPeakDiffY) {
- maxPeakDiffY = peakDiffY;
- }
- if (peakDiffZ > maxPeakDiffZ) {
- maxPeakDiffZ = peakDiffZ;
- }
-
- //NSLog(@"X: %d Y: %d Z: %d maxDiff X: %f Y: %f Z: %f", maxSscX, maxSscY, maxSscZ, maxPeakDiffX, maxPeakDiffY, maxPeakDiffZ);
-
- if (((maxSscX >= 1 && maxSscY >= 3 /*&& maxSscZ >= 2*/) || maxSscX + maxSscY + maxSscZ >= 5) &&
- (maxPeakDiffX >= MIN_DIFF_THRESHOLD && maxPeakDiffY >= MIN_DIFF_THRESHOLD && maxPeakDiffZ >=
- MIN_DIFF_THRESHOLD) &&
- (maxPeakDiffX <= MAX_DIFF_THRESHOLD && maxPeakDiffY <= MAX_DIFF_THRESHOLD && maxPeakDiffZ <=
- MAX_DIFF_THRESHOLD)) {
- MyoLogDebug(@"SNAP DETECTED!");
- self.lastRecognizeDate = [NSDate date];
- return TLMMyoDidReceiveSnapGestureNotification;
- }
-
- return @"";
-}
-
-@end