Lateral Velocity - Revision history

Sheldor: Minor edit.

2013-05-01T18:02:00Z

Minor edit.

Sheldor: I tried to give a better explanation.

2012-12-17T21:39:40Z

I tried to give a better explanation.

Nat: add link to advancing velocity

2011-03-14T06:08:39Z

add link to advancing velocity

RednaxelaBot: Using .

2010-07-01T08:28:45Z

Using <syntaxhighlight>.

Urgood2 at 04:30, 21 March 2010

2010-03-21T04:30:08Z

Urgood2 at 04:29, 21 March 2010

2010-03-21T04:29:50Z

Voidious: basic page for this

2009-05-07T19:43:12Z

basic page for this

New page

A bot's velocity in a direction perpendicular to the reference bot. For a bot moving perpendicular, abs(velocity) would equal abs(lateral velocity), while for a bot moving directly toward or away from a reference bot, lateral velocity would be zero.

An example of calculating an enemy's lateral velocity would be:

<pre>
public void onScannedRobot(ScannedRobotEvent e) {
double enemyAbsoluteBearing = e.getBearingRadians() + getHeadingRadians();
double enemyLatVel = e.getVelocity()*Math.sin(e.getHeadingRadians() - enemyAbsoluteBearing);
}
</pre>

In this example, a bot moving clockwise has a positive lateral velocity, while a bot moving counter-clockwise has a negative lateral velocity.

[[Category:Terminology]]

@@ Line 1: / Line 1: @@
 A bot's velocity in a direction perpendicular to the reference bot. For a bot moving exactly perpendicular to the reference bot, abs(velocity) would equal abs(lateral velocity), while for a bot moving directly toward or away from a reference bot, lateral velocity would be zero.
-Another way to look at this would be to imagine an enemy bot moving full speed at a 45 degree angle toward or away from the reference bot. From the reference bot's perspective, the actual lateral distance the enemy covers would be the same as if the enemy was moving perpendicular at half-speed. So, if the reference bot was using [[Linear Targeting|linear targeting]], it would aim at a velocity of 4(or -4 if the enemy was moving counter-clockwise), and(assuming the enemy moved in a straight line and didn't hit a wall), it would hit the enemy every time!
+As a hypothetical example, let's imagine an enemy bot moving full speed at a 45 degree angle toward or away from the reference bot. From the reference bot's perspective, the actual lateral distance the enemy covers would be the same as if the enemy was moving perpendicular at half-speed. So, if the reference bot was using [[Linear Targeting|linear targeting]], it would aim at a velocity of 4 (or -4 if the enemy was moving counter-clockwise), and (assuming the enemy moved in a straight line and didn't hit a wall), it would hit the enemy every time!
 Lateral velocities are very commonly used in [[:Category:Targeting|targeting algorithms]], ranging from simple linear targeting to extremely complex [[GuessFactor Targeting (traditional)|guess factor guns]].

@@ Line 1: / Line 1: @@
-A bot's velocity in a direction perpendicular to the reference bot. For a bot moving perpendicular, abs(velocity) would equal abs(lateral velocity), while for a bot moving directly toward or away from a reference bot, lateral velocity would be zero.
+A bot's velocity in a direction perpendicular to the reference bot. For a bot moving exactly perpendicular to the reference bot, abs(velocity) would equal abs(lateral velocity), while for a bot moving directly toward or away from a reference bot, lateral velocity would be zero.
-An example of calculating an enemy's lateral velocity would be:
+Another way to look at this would be to imagine an enemy bot moving full speed at a 45 degree angle toward or away from the reference bot. From the reference bot's perspective, the actual lateral distance the enemy covers would be the same as if the enemy was moving perpendicular at half-speed. So, if the reference bot was using [[Linear Targeting|linear targeting]], it would aim at a velocity of 4(or -4 if the enemy was moving counter-clockwise), and(assuming the enemy moved in a straight line and didn't hit a wall), it would hit the enemy every time!
 <syntaxhighlight>
 public void onScannedRobot(ScannedRobotEvent e) {
      double enemyAbsoluteBearing = e.getBearingRadians() + getHeadingRadians();
-     double enemyLatVel = e.getVelocity()*Math.sin(e.getHeadingRadians() - enemyAbsoluteBearing);
+     double enemyLateralVelocity = e.getVelocity() * Math.sin(e.getHeadingRadians() - enemyAbsoluteBearing);
+}
 </syntaxhighlight>
-In this example, a bot moving clockwise has a positive lateral velocity, while a bot moving counter-clockwise has a negative lateral velocity.
+In this example, a bot moving clockwise would have a positive lateral velocity, and a bot moving counter-clockwise would have a negative lateral velocity.
 == See Also ==
 * [[Linear Targeting]]
 * [[Advancing Velocity]]
 [[Category:Terminology]]

@@ Line 13: / Line 13: @@
 == See Also ==
-[[Linear Targeting]]
+* [[Linear Targeting]]
 [[Category:Terminology]]

@@ Line 13: / Line 13: @@
 == See Also ==
-Linear Targeting
+[[Linear Targeting]]
 [[Category:Terminology]]

← Older revision		Revision as of 04:29, 21 March 2010
Line 11:		Line 11:

	In this example, a bot moving clockwise has a positive lateral velocity, while a bot moving counter-clockwise has a negative lateral velocity.		In this example, a bot moving clockwise has a positive lateral velocity, while a bot moving counter-clockwise has a negative lateral velocity.
		+
		+	== See Also ==
		+	Linear Targeting

	[[Category:Terminology]]		[[Category:Terminology]]