diff options
| author | Peter Hutterer <peter.hutterer@who-t.net> | 2014-07-08 12:09:20 +1000 |
|---|---|---|
| committer | Peter Hutterer <peter.hutterer@who-t.net> | 2014-07-09 12:48:44 +1000 |
| commit | 14ba84cdca6776772e50efd3753ac01080317669 (patch) | |
| tree | fd56b1099b93848b78e897b23574a4f09564ab72 | |
| parent | b908e070e9a81e5ab6fa7840ce085a330a2c7eac (diff) | |
| download | libinput-14ba84cdca6776772e50efd3753ac01080317669.tar.gz | |
filter: drop constant acceleration
This just moves a decimal point around, at the expense of making the approach
harder to understand. The only time the const acceleration matters is when
applied to the velocity but it only matters in relation to the threshold which
is a fixed number.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
| -rw-r--r-- | src/filter.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/src/filter.c b/src/filter.c index 4b2bbadd..5b0b8774 100644 --- a/src/filter.c +++ b/src/filter.c @@ -51,8 +51,7 @@ filter_destroy(struct motion_filter *filter) * Default parameters for pointer acceleration profiles. */ -#define DEFAULT_CONSTANT_ACCELERATION 10.0 /* unitless factor */ -#define DEFAULT_THRESHOLD 4.0 /* in units/ms */ +#define DEFAULT_THRESHOLD 0.4 /* in units/ms */ #define DEFAULT_ACCELERATION 2.0 /* unitless factor */ /* @@ -337,12 +336,11 @@ pointer_accel_profile_smooth_simple(struct motion_filter *filter, double smooth_accel_coefficient; /* unitless factor */ double factor; /* unitless factor */ - if (threshold < 1.0) - threshold = 1.0; + if (threshold < 0.1) + threshold = 0.1; if (accel < 1.0) accel = 1.0; - velocity *= DEFAULT_CONSTANT_ACCELERATION; if (velocity < (threshold / 2.0)) return calc_penumbral_gradient(0.5 + velocity / threshold) * 2.0 - 1.0; |