com.badlogic.gdx.ai.steer.utils.rays.ParallelSideRayConfiguration Maven / Gradle / Ivy
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* Copyright 2014 See AUTHORS file.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* http://www.apache.org/licenses/LICENSE-2.0
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package com.badlogic.gdx.ai.steer.utils.rays;
import com.badlogic.gdx.ai.steer.Steerable;
import com.badlogic.gdx.ai.utils.Ray;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Vector;
/** A {@code ParallelSideRayConfiguration} uses two rays parallel to the direction of motion. The rays have the same length and
* opposite side offset.
*
* The parallel configuration works well in areas where corners are highly obtuse but is very susceptible to the corner trap.
*
* @param Type of vector, either 2D or 3D, implementing the {@link Vector} interface
*
* @author davebaol */
public class ParallelSideRayConfiguration> extends RayConfigurationBase {
private static final float HALF_PI = MathUtils.PI * 0.5f;
private float length;
private float sideOffset;
/** Creates a {@code ParallelSideRayConfiguration} for the given owner where the two rays have the specified length and side
* offset.
* @param owner the owner of this ray configuration
* @param length the length of the rays.
* @param sideOffset the side offset of the rays. */
public ParallelSideRayConfiguration (Steerable owner, float length, float sideOffset) {
super(owner, 2);
this.length = length;
this.sideOffset = sideOffset;
}
@Override
public Ray[] updateRays () {
float velocityAngle = owner.vectorToAngle(owner.getLinearVelocity());
// Update ray 0
owner.angleToVector(rays[0].start, velocityAngle - HALF_PI).scl(sideOffset).add(owner.getPosition());
rays[0].end.set(owner.getLinearVelocity()).nor().scl(length); // later we'll add rays[0].start;
// Update ray 1
owner.angleToVector(rays[1].start, velocityAngle + HALF_PI).scl(sideOffset).add(owner.getPosition());
rays[1].end.set(rays[0].end).add(rays[1].start);
// add start position to ray 0
rays[0].end.add(rays[0].start);
return rays;
}
/** Returns the length of the rays. */
public float getLength () {
return length;
}
/** Sets the length of the rays. */
public void setLength (float length) {
this.length = length;
}
/** Returns the side offset of the rays. */
public float getSideOffset () {
return sideOffset;
}
/** Sets the side offset of the rays. */
public void setSideOffset (float sideOffset) {
this.sideOffset = sideOffset;
}
}