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altoslib: Use a longer filter for descent values
[fw/altos]
/
altoslib
/
AltosState.java
diff --git
a/altoslib/AltosState.java
b/altoslib/AltosState.java
index a120e0c7e1965b1caa14a8b289997d3aa69ddb48..8eacf97515d74f3f280dd12ed5d37609067c56d6 100644
(file)
--- a/
altoslib/AltosState.java
+++ b/
altoslib/AltosState.java
@@
-31,8
+31,9
@@
public class AltosState implements Cloneable, Serializable {
public int set;
public int set;
+ static final double filter_len = 2.0;
static final double ascent_filter_len = 0.5;
static final double ascent_filter_len = 0.5;
- static final double descent_filter_len =
0.5
;
+ static final double descent_filter_len =
5.0
;
/* derived data */
/* derived data */
@@
-64,8
+65,10
@@
public class AltosState implements Cloneable, Serializable {
}
void set_filtered(double new_value, double time) {
}
void set_filtered(double new_value, double time) {
- if (prev_value != AltosLib.MISSING)
- new_value = (prev_value * 15.0 + new_value) / 16.0;
+ if (prev_value != AltosLib.MISSING) {
+ double f = 1/Math.exp((time - prev_set_time) / filter_le);
+ new_value = f * new_value + (1-f) * prev_value;
+ }
set(new_value, time);
}
set(new_value, time);
}