Created
March 17, 2017 07:03
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Complete 2D Vector Class for Java
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| public class Vector2D { | |
| public double x; | |
| public double y; | |
| public Vector2D() { } | |
| public Vector2D(double x, double y) { | |
| this.x = x; | |
| this.y = y; | |
| } | |
| public Vector2D(Vector2D v) { | |
| set(v); | |
| } | |
| public void set(double x, double y) { | |
| this.x = x; | |
| this.y = y; | |
| } | |
| public void set(Vector2D v) { | |
| this.x = v.x; | |
| this.y = v.y; | |
| } | |
| public void setZero() { | |
| x = 0; | |
| y = 0; | |
| } | |
| public double[] getComponents() { | |
| return new double[]{x, y}; | |
| } | |
| public double getLength() { | |
| return Math.sqrt(x * x + y * y); | |
| } | |
| public double getLengthSq() { | |
| return (x * x + y * y); | |
| } | |
| public double distanceSq(double vx, double vy) { | |
| vx -= x; | |
| vy -= y; | |
| return (vx * vx + vy * vy); | |
| } | |
| public double distanceSq(Vector2D v) { | |
| double vx = v.x - this.x; | |
| double vy = v.y - this.y; | |
| return (vx * vx + vy * vy); | |
| } | |
| public double distance(double vx, double vy) { | |
| vx -= x; | |
| vy -= y; | |
| return Math.sqrt(vx * vx + vy * vy); | |
| } | |
| public double distance(Vector2D v) { | |
| double vx = v.x - this.x; | |
| double vy = v.y - this.y; | |
| return Math.sqrt(vx * vx + vy * vy); | |
| } | |
| public double getAngle() { | |
| return Math.atan2(y, x); | |
| } | |
| public void normalize() { | |
| double magnitude = getLength(); | |
| x /= magnitude; | |
| y /= magnitude; | |
| } | |
| public Vector2D getNormalized() { | |
| double magnitude = getLength(); | |
| return new Vector2D(x / magnitude, y / magnitude); | |
| } | |
| public static Vector2D toCartesian(double magnitude, double angle) { | |
| return new Vector2D(magnitude * Math.cos(angle), magnitude * Math.sin(angle)); | |
| } | |
| public void add(Vector2D v) { | |
| this.x += v.x; | |
| this.y += v.y; | |
| } | |
| public void add(double vx, double vy) { | |
| this.x += vx; | |
| this.y += vy; | |
| } | |
| public static Vector2D add(Vector2D v1, Vector2D v2) { | |
| return new Vector2D(v1.x + v2.x, v1.y + v2.y); | |
| } | |
| public Vector2D getAdded(Vector2D v) { | |
| return new Vector2D(this.x + v.x, this.y + v.y); | |
| } | |
| public void subtract(Vector2D v) { | |
| this.x -= v.x; | |
| this.y -= v.y; | |
| } | |
| public void subtract(double vx, double vy) { | |
| this.x -= vx; | |
| this.y -= vy; | |
| } | |
| public static Vector2D subtract(Vector2D v1, Vector2D v2) { | |
| return new Vector2D(v1.x - v2.x, v1.y - v2.y); | |
| } | |
| public Vector2D getSubtracted(Vector2D v) { | |
| return new Vector2D(this.x - v.x, this.y - v.y); | |
| } | |
| public void multiply(double scalar) { | |
| x *= scalar; | |
| y *= scalar; | |
| } | |
| public Vector2D getMultiplied(double scalar) { | |
| return new Vector2D(x * scalar, y * scalar); | |
| } | |
| public void divide(double scalar) { | |
| x /= scalar; | |
| y /= scalar; | |
| } | |
| public Vector2D getDivided(double scalar) { | |
| return new Vector2D(x / scalar, y / scalar); | |
| } | |
| public Vector2D getPerp() { | |
| return new Vector2D(-y, x); | |
| } | |
| public double dot(Vector2D v) { | |
| return (this.x * v.x + this.y * v.y); | |
| } | |
| public double dot(double vx, double vy) { | |
| return (this.x * vx + this.y * vy); | |
| } | |
| public static double dot(Vector2D v1, Vector2D v2) { | |
| return v1.x * v2.x + v1.y * v2.y; | |
| } | |
| public double cross(Vector2D v) { | |
| return (this.x * v.y - this.y * v.x); | |
| } | |
| public double cross(double vx, double vy) { | |
| return (this.x * vy - this.y * vx); | |
| } | |
| public static double cross(Vector2D v1, Vector2D v2) { | |
| return (v1.x * v2.y - v1.y * v2.x); | |
| } | |
| public double project(Vector2D v) { | |
| return (this.dot(v) / this.getLength()); | |
| } | |
| public double project(double vx, double vy) { | |
| return (this.dot(vx, vy) / this.getLength()); | |
| } | |
| public static double project(Vector2D v1, Vector2D v2) { | |
| return (dot(v1, v2) / v1.getLength()); | |
| } | |
| public Vector2D getProjectedVector(Vector2D v) { | |
| return this.getNormalized().getMultiplied(this.dot(v) / this.getLength()); | |
| } | |
| public Vector2D getProjectedVector(double vx, double vy) { | |
| return this.getNormalized().getMultiplied(this.dot(vx, vy) / this.getLength()); | |
| } | |
| public static Vector2D getProjectedVector(Vector2D v1, Vector2D v2) { | |
| return v1.getNormalized().getMultiplied(Vector2D.dot(v1, v2) / v1.getLength()); | |
| } | |
| public void rotateBy(double angle) { | |
| double cos = Math.cos(angle); | |
| double sin = Math.sin(angle); | |
| double rx = x * cos - y * sin; | |
| y = x * sin + y * cos; | |
| x = rx; | |
| } | |
| public Vector2D getRotatedBy(double angle) { | |
| double cos = Math.cos(angle); | |
| double sin = Math.sin(angle); | |
| return new Vector2D(x * cos - y * sin, x * sin + y * cos); | |
| } | |
| public void rotateTo(double angle) { | |
| set(toCartesian(getLength(), angle)); | |
| } | |
| public Vector2D getRotatedTo(double angle) { | |
| return toCartesian(getLength(), angle); | |
| } | |
| public void reverse() { | |
| x = -x; | |
| y = -y; | |
| } | |
| public Vector2D getReversed() { | |
| return new Vector2D(-x, -y); | |
| } | |
| @Override | |
| public Vector2D clone() { | |
| return new Vector2D(x, y); | |
| } | |
| @Override | |
| public boolean equals(Object obj) { | |
| if (obj == this) { | |
| return true; | |
| } | |
| if (obj instanceof Vector2D) { | |
| Vector2D v = (Vector2D) obj; | |
| return (x == v.x) && (y == v.y); | |
| } | |
| return false; | |
| } | |
| @Override | |
| public String toString() { | |
| return "Vector2d[" + x + ", " + y + "]"; | |
| } | |
| } |
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