Difference between revisions of "U"
Jump to navigation
Jump to search
(Initial commit.) |
m (fix) |
||
| (13 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
| − | This page is dedicated for describing the <code> | + | {{Stub}} |
| + | |||
| + | This page is dedicated for describing the <code>aaa.util.math.U</code> | ||
| + | |||
---- | ---- | ||
| − | |||
| − | + | ''U'' is a universal math library, where ''U'' stands for ''U''niversal. | |
| + | |||
| + | The purpose of U is to avoid code like this, which coupled business logic and math logic | ||
| + | |||
<syntaxhighlight lang="java"> | <syntaxhighlight lang="java"> | ||
| − | + | double absoluteBearing = this.getHeadingRadians() + event.getBearingRadians(); | |
| − | + | double latVel = Math.sin(event.getHeadingRadians() - absoluteBearing) * event.getVelocity(); | |
| − | + | double advVel = -Math.cos(event.getHeadingRadians() - absoluteBearing) * event.getVelocity(); | |
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | write like this: | |
<syntaxhighlight lang="java"> | <syntaxhighlight lang="java"> | ||
| − | + | V direction = direction(robot.pos(), enemy.pos()); | |
| − | double latVel = cross( | + | double latVel = cross(direction, enemy.vel()); |
| − | double advVel = dot( | + | double advVel = -dot(direction, enemy.vel()); |
</syntaxhighlight> | </syntaxhighlight> | ||
| + | |||
| + | the second one is also much faster because it involves no trig. | ||
Latest revision as of 07:17, 8 August 2018
| This article is a stub. You can help RoboWiki by expanding it. |
This page is dedicated for describing the aaa.util.math.U
U is a universal math library, where U stands for Universal.
The purpose of U is to avoid code like this, which coupled business logic and math logic
double absoluteBearing = this.getHeadingRadians() + event.getBearingRadians();
double latVel = Math.sin(event.getHeadingRadians() - absoluteBearing) * event.getVelocity();
double advVel = -Math.cos(event.getHeadingRadians() - absoluteBearing) * event.getVelocity();
write like this:
V direction = direction(robot.pos(), enemy.pos());
double latVel = cross(direction, enemy.vel());
double advVel = -dot(direction, enemy.vel());
the second one is also much faster because it involves no trig.
