Difference between revisions of "U"
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m (no trig is even faster than fast trig!) |
m (fix) |
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| (2 intermediate revisions by the same user not shown) | |||
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''U'' is a universal math library, where ''U'' stands for ''U''niversal. | ''U'' is a universal math library, where ''U'' stands for ''U''niversal. | ||
| − | The | + | 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> | ||
| Line 20: | Line 20: | ||
<syntaxhighlight lang="java"> | <syntaxhighlight lang="java"> | ||
| − | + | V direction = direction(robot.pos(), enemy.pos()); | |
| − | + | double latVel = cross(direction, enemy.vel()); | |
| − | + | double advVel = -dot(direction, enemy.vel()); | |
</syntaxhighlight> | </syntaxhighlight> | ||
the second one is also much faster because it involves no trig. | the second one is also much faster because it involves no trig. | ||
Latest revision as of 07:17, 8 August 2018
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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.
