1 files changed, 132 insertions, 0 deletions
diff --git a/fw/fe310/eos/eve/eve_vtrack.c b/fw/fe310/eos/eve/eve_vtrack.c
new file mode 100644
index 0000000..bf65ec8
--- /dev/null
+++ b/fw/fe310/eos/eve/eve_vtrack.c
@@ -0,0 +1,132 @@
+#include <stdlib.h>
+#include <math.h>
+
+#include "eve.h"
+
+static EVEVTrack _vtrack;
+static EVEVTrackInert _vtrack_inert;
+
+void eve_vtrack_init(void) {
+    eve_vtrack_inert_init(&_vtrack_inert, EVE_VTRACK_FRICTION);
+    eve_vtrack_set(eve_vtrack_inert_start, eve_vtrack_inert_tick, eve_vtrack_inert_stop, &_vtrack_inert);
+}
+
+EVEVTrack *eve_vtrack_get(void) {
+    return &_vtrack;
+}
+
+void eve_vtrack_set(eve_vtrack_start_t start, eve_vtrack_tick_t tick, eve_vtrack_stop_t stop, void *param) {
+    _vtrack.start = start;
+    _vtrack.tick = tick;
+    _vtrack.stop = stop;
+    _vtrack.param = param;
+}
+
+void eve_vtrack_reset(void) {
+    eve_vtrack_set(eve_vtrack_inert_start, eve_vtrack_inert_tick, eve_vtrack_inert_stop, &_vtrack_inert);
+}
+
+void eve_vtrack_start(uint8_t tag0, int i) {
+    EVETouch *touch = eve_touch_get(i);
+
+    eve_touch_timer_set(tag0, i, EVE_TOUCH_ETYPE_TRACK, EVE_TOUCH_TIMEOUT_TRACK);
+    if (_vtrack.start) _vtrack.start(touch, _vtrack.param);
+}
+
+void eve_vtrack_stop(void) {
+    eve_touch_timer_clear();
+    eve_vtrack_reset();
+}
+
+
+EVEVTrackInert *eve_vtrack_inert_get_param(void) {
+    return &_vtrack_inert;
+}
+
+void eve_vtrack_inert_init(EVEVTrackInert *param, int fc) {
+    param->fc = fc;
+}
+
+void eve_vtrack_inert_start(EVETouch *touch, void *p) {
+    EVEVTrackInert *param = (EVEVTrackInert *)p;
+    double d = sqrt(touch->vx * touch->vx + touch->vy * touch->vy);
+
+    param->x0 = touch->x;
+    param->y0 = touch->y;
+    param->f = (double)(EVE_RTC_FREQ) * d / param->fc;
+}
+
+int eve_vtrack_inert_tick(EVETouch *touch, void *p) {
+    EVEVTrackInert *param = (EVEVTrackInert *)p;
+    int dt = eve_time_get_tick() - touch->t;
+    int f = param->f;
+    int more = 1;
+
+    if (dt >= f / 2) {
+        dt = f / 2;
+        more = 0;
+    }
+    touch->x = param->x0 + (touch->vx * dt - touch->vx * dt / f * dt) / (int)(EVE_RTC_FREQ);
+    touch->y = param->y0 + (touch->vy * dt - touch->vy * dt / f * dt) / (int)(EVE_RTC_FREQ);
+
+    return more;
+}
+
+void eve_vtrack_inert_stop(EVETouch *touch, void *p) {
+    touch->evt |= EVE_TOUCH_ETYPE_TRACK_STOP;
+}
+
+
+static EVEVTrackOsc _vtrack_osc;
+
+EVEVTrackOsc *eve_vtrack_osc_get_param(void) {
+    return &_vtrack_osc;
+}
+
+void eve_vtrack_osc_init(EVEVTrackOsc *param, int x, int y, uint32_t T, double d, uint32_t t_max) {
+    double f0 = 2 * M_PI / (T * EVE_RTC_FREQ / 1000);
+
+    if (d < 0) d = 0;
+    if (d > 1) d = 1;
+    param->x = x;
+    param->y = y;
+    param->f = d ? f0 * sqrt(1 - d * d) : f0;
+    param->d = d;
+    param->a = -d * f0;
+    param->t_max = t_max;
+}
+
+void eve_vtrack_osc_start(EVETouch *touch, void *p) {
+    EVEVTrackOsc *param = (EVEVTrackOsc *)p;
+
+    param->x0 = touch->x;
+    param->y0 = touch->y;
+}
+
+int eve_vtrack_osc_tick(EVETouch *touch, void *p) {
+    EVEVTrackOsc *param = (EVEVTrackOsc *)p;
+    int dt = eve_time_get_tick() - touch->t;
+    int ax = param->x0 - param->x;
+    int ay = param->y0 - param->y;
+    int more = 1;
+
+    if (param->t_max && (dt >= param->t_max)) {
+        dt = param->t_max;
+        more = 0;
+    }
+    if (param->d) {
+        double e = exp(param->a * dt);
+        ax = ax * e;
+        ay = ay * e;
+        if ((ax == 0) && (ay == 0)) more = 0;
+    }
+    touch->x = param->x + ax * cos(param->f * dt);
+    touch->y = param->y + ay * cos(param->f * dt);
+
+    return more;
+}
+
+void eve_vtrack_osc_stop(EVETouch *touch, void *p) {
+    touch->evt |= EVE_TOUCH_ETYPE_TRACK_STOP;
+    eve_vtrack_reset();
+}