Example usage for com.badlogic.gdx.ai.steer Steerable getLinearVelocity

Introduction

In this page you can find the example usage for com.badlogic.gdx.ai.steer Steerable getLinearVelocity.

Prototype

public T getLinearVelocity();

Source Link

Document

Returns the vector indicating the linear velocity of this Steerable.

Usage

From source file:com.mygdx.game.CustomCollisionAvoidance.java

License:Apache License

@Override
public boolean reportNeighbor(Steerable<T> neighbor) {
    // Calculate the time to collision
    relativePosition.set(neighbor.getPosition()).sub(owner.getPosition());
    relativeVelocity.set(neighbor.getLinearVelocity()).sub(owner.getLinearVelocity());
    float relativeSpeed2 = relativeVelocity.len2();
    float timeToCollision = -relativePosition.dot(relativeVelocity) / relativeSpeed2;

    if (Float.isNaN(timeToCollision)) {
        timeToCollision = 0.0f;//from w  w w . jav  a  2  s.co  m
    }

    // If timeToCollision is negative, i.e. the owner is already moving away from the the neighbor,
    // or it's not the most imminent collision then no action needs to be taken.
    if (timeToCollision <= 0 || timeToCollision >= shortestTime)
        return false;

    // Check if it is going to be a collision at all
    float distance = relativePosition.len();
    float minSeparation = distance - (float) Math.sqrt(relativeSpeed2) * timeToCollision /* shortestTime */;
    if (minSeparation > owner.getBoundingRadius() + neighbor.getBoundingRadius())
        return false;

    // Store most imminent collision data
    shortestTime = timeToCollision;
    firstNeighbor = neighbor;
    firstMinSeparation = minSeparation;
    firstDistance = distance;
    firstRelativePosition.set(relativePosition);
    firstRelativeVelocity.set(relativeVelocity);

    return true;
}

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