六角网格（平顶）距离计算

Question

public void setQR(int theQ, int theR){

    this.q = theQ;
    this.r = theR;

    this.x = this.q;
    this.z = this.r - (this.q - (this.q&1)) /2;
    this.y = -(this.x + this.z);
}

    private double distance = 0;

public double workOutDistance(Hexagon hexagon, HexagonFood target){

    double targetX = target.getCPX();
    double targetY = target.getCPY();

    double hexagonX = hexagon.getCPX();
    double hexagonY = hexagon.getCPY();

    double deltaX = (targetX-hexagonX)*-1;
    double deltaY = (targetY-hexagonY)*-1;

    double deltaXRadius = (deltaX/(SimField.hexSize)/1.5);
    double deltaYApothem = (deltaY/(SimField.hexSize/1.155)/2);

    hexagon.setQR((int)deltaXRadius, (int)deltaYApothem);


    ArrayList<Integer> coords = new ArrayList<>();

    coords.add(
    Math.abs(hexagon.getX() - target.getX())
    );

    coords.add(
    Math.abs(hexagon.getZ() - target.getZ())
    );

    coords.add(
    Math.abs(hexagon.getY() - target.getY())
    );

    System.out.println(coords);
    distance = Collections.max(coords);

    return distance;
}

改变这个..

public void setQR(int theQ, int theR){

    this.q = theQ;
    this.r = theR;

    this.x = this.q;
    this.z = this.r - (this.q - (this.q&1)) /2;
    this.y = -(this.x + this.z);
}

对此..

public void setQR(int theQ, int theR){

    this.q = theQ;
    this.r = theR;

    this.x = this.q;
    if (this.r>0){
        this.z = this.r - (this.q - (this.q&1))/2;
    }
    else {
        this.z = this.r - (this.q + (this.q&1))/2;
    }
    this.y = -(this.x + this.z);
}