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[c] Port of commit 3ea4f66. AnimationState, fixed rotation mix when direction changes. See #2158.

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This commit is contained in:
Mario Zechner 2022-10-06 16:48:46 +02:00
parent 6d4f2c2c1b
commit 98c10437c5
1 changed files with 14 additions and 11 deletions
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25
spine-c/spine-c/src/spine/AnimationState.c
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@ -673,18 +673,21 @@ void _spAnimationState_applyRotateTimeline(spAnimationState *self, spTimeline *t
lastTotal = 0;
lastDiff = diff;
} else {
lastTotal = timelinesRotation[i]; /* Angle and direction of mix, including loops. */
lastDiff = timelinesRotation[i + 1]; /* Difference between bones. */
lastTotal = timelinesRotation[i];
lastDiff = timelinesRotation[i + 1];
}
current = diff > 0;
dir = lastTotal >= 0;
/* Detect cross at 0 (not 180). */
if (SIGNUM(lastDiff) != SIGNUM(diff) && ABS(lastDiff) <= 90) {
/* A cross after a 360 rotation is a loop. */
if (ABS(lastTotal) > 180) lastTotal += 360 * SIGNUM(lastTotal);
dir = current;
}
total = diff + lastTotal - FMOD(lastTotal, 360); /* Store loops as part of lastTotal. */
float loops = lastTotal - FMOD(lastTotal, 360);
total = diff + loops;
int current = diff >= 0, dir = lastTotal >= 0;
if (ABS(lastDiff) <= 90 && SIGNUM(lastDiff) != SIGNUM(diff)) {
if (ABS(lastTotal - loops) > 180) {
total += 360 * SIGNUM(lastTotal);
dir = current;
} else if (loops != 0)
total -= 360 * SIGNUM(lastTotal);
else
dir = current;
}
if (dir != current) total += 360 * SIGNUM(lastTotal);
timelinesRotation[i] = total;
}