Sangman at 15:03, 6 April 2021

2021-04-06T15:03:14Z

@@ Line 43: / Line 43: @@
          set RETURN 1
 ends
 </pre>
 [[Category: Tutorials]]

Sangman: Added tutorial for something that was doing my head in last night

2021-04-06T15:01:11Z

Added tutorial for something that was doing my head in last night

New page

In this example code, we will validate that angle A does not exceed angle B by 512 units. If it does, RETURN is set to 1.
It assumes temp, temp2 and temp3 variables are declared.
The tricky part in this comparison is that angles wrap back around to 0 when reaching 2048, this must be taken into account when comparing angle difference.

<pre>
var MAX_ANGLE_DIFF 0 2
var ANGLE_A 0 2
var ANGLE_B
defstate check_max_angle_diff
set temp2 ANGLE_B
sub temp2 MAX_ANGLE_DIFF

set temp3 ANGLE_B
add temp3 MAX_ANGLE_DIFF

ifl temp2 0
add temp2 2048

ifge temp3 2048
sub temp3 2048

set temp 0
set RETURN 0
ifl temp3 temp2
{
// we wrapped around the 0/2048 line, either case is enough
ifl ANGLE_A temp3
set temp 1
else ifg ANGLE_A temp2
set temp 1
}
else
{
// we didn't wrap around so needs to be inbetween [temp2-temp3]
ifge ANGLE_A temp2
ifle ANGLE_A temp3
set temp 1
}

ife temp 1
set RETURN 0
else
set RETURN 1
ends
</pre>

[[Category: Tutorials]]

Validate maximum difference between two angles - Revision history

Sangman at 15:03, 6 April 2021

Sangman: Added tutorial for something that was doing my head in last night