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Ray 2016-02-08 09:04:33 +01:00
parent e98ea900cf
commit 687fe2c3c7
1 changed files with 13 additions and 41 deletions
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46
src/gestures.c
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@ -99,7 +99,7 @@ static unsigned int enabledGestures = 0b0000001111111111;
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
static float CalculateAngle(Vector2 initialPosition, Vector2 actualPosition, float magnitude);
static float Vector2Angle(Vector2 initialPosition, Vector2 finalPosition);
static float Vector2Distance(Vector2 v1, Vector2 v2);
static double GetCurrentTime();
@ -154,7 +154,7 @@ void ProcessGestureEvent(GestureEvent event)
// Detect GESTURE_SWIPE
if ((dragIntensity > FORCE_TO_SWIPE) && (touchId == 0)) // RAY: why check (touchId == 0)???
{
dragAngle = CalculateAngle(touchDownPosition, touchUpPosition, dragDistance);
dragAngle = Vector2Angle(touchDownPosition, touchUpPosition);
if ((dragAngle < 30) || (dragAngle > 330)) currentGesture = GESTURE_SWIPE_RIGHT; // Right
else if ((dragAngle > 30) && (dragAngle < 120)) currentGesture = GESTURE_SWIPE_UP; // Up
@ -322,46 +322,18 @@ float GetGesturePinchAngle(void)
// RAY: Do we really need magnitude??? why???
// TODO: Remove magnitude dependency...
static float CalculateAngle(Vector2 initialPosition, Vector2 finalPosition, float magnitude)
static float Vector2Angle(Vector2 initialPosition, Vector2 finalPosition)
{
float angle;
// Calculate arcsinus of the movement // RAY: o__O
angle = asin((finalPosition.y - initialPosition.y)/magnitude);
// RAY: review this (better) solution
angle = atan2(finalPosition.y - initialPosition.y, finalPosition.x - initialPosition.x);
angle *= RAD2DEG;
// RAY: review this (better) solution
//angle = atan2(p1.y - p2.y, p1.x - p2.x);
//angle *= RAD2DEG;
if (angle < 0) angle += 360;
// http://stackoverflow.com/questions/21483999/using-atan2-to-find-angle-between-two-vectors
// TODO: Remove sector dependency (self-note: check moving eyes exercise)
// Calculate angle depending on the sector
if ((finalPosition.x - initialPosition.x) >= 0)
{
// Sector 4
if ((finalPosition.y - initialPosition.y) >= 0)
{
angle *= -1;
angle += 360;
}
// Sector 1
else angle *= -1;
}
else
{
// Sector 3
if ((finalPosition.y - initialPosition.y) >= 0) angle += 180;
// Sector 2
else
{
angle *= -1;
angle = 180 - angle;
}
}
return angle;
}
@ -389,16 +361,16 @@ static double GetCurrentTime()
QueryPerformanceFrequency(&clockFrequency);
QueryPerformanceCounter(&currentTime);
time = (double)currentTime/clockFrequency*1000.0f; // time in miliseconds
time = (double)currentTime/clockFrequency*1000.0f; // Time in miliseconds
#endif
#if defined(__linux)
// NOTE: Only for Linux-based systems
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
uint64_t nowTime = (uint64_t)now.tv_sec*1000000000LLU + (uint64_t)now.tv_nsec; // Time provided in nanoseconds
uint64_t nowTime = (uint64_t)now.tv_sec*1000000000LLU + (uint64_t)now.tv_nsec; // Time in nanoseconds
time = ((double)nowTime/1000000.0); // time in miliseconds
time = ((double)nowTime/1000000.0); // Time in miliseconds
#endif
return time;