wip: initial implementation of vector class

Author: kaylendog

math/src/main/java/com/dumbdogdiner/stickyapi/math/transform/Matrix.java

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+/*
+ * Copyright (c) 2020-2021 DumbDogDiner <dumbdogdiner.com>. All rights reserved.
+ * Licensed under the MIT license, see LICENSE for more information...
+ */
+package com.dumbdogdiner.stickyapi.math.transform;
+
+public class Matrix {
+}

math/src/main/java/com/dumbdogdiner/stickyapi/math/vector/Vector.java

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+/*
+ * Copyright (c) 2020-2021 DumbDogDiner <dumbdogdiner.com>. All rights reserved.
+ * Licensed under the MIT license, see LICENSE for more information...
+ */
+package com.dumbdogdiner.stickyapi.math.vector;
+
+import com.sun.net.httpserver.HttpServer;
+
+/**
+ * Base abstract class for an immutable vector.
+ * @param <T>
+ */
+abstract class Vector<T> {
+	/**
+	 * @return The number of dimensions this vector has.
+	 */
+	abstract int getDimensions();
+
+	abstract Vector<T> add(Vector<T> vector);
+
+	abstract Vector<T> subtract(Vector<T> vector);
+
+	/**
+	 * Return the vector from this vector to the target vector.
+	 * @param vector The target vector
+	 * @return The vector from this vector to the target vector.
+	 */
+	Vector<T> to(Vector<T> vector) {
+		return vector.subtract(vector);
+	};
+
+	/**
+	 * Scale this vector by the given scalar.
+	 * @param scalar The scalar to scale by
+	 * @return The scaled vector.
+	 */
+	abstract Vector<T> scale(Number scalar);
+
+	/**
+ 	 * @return The magnitude of this vector.
+	 */
+	abstract double abs();
+
+	/**
+	 * @return A unit vector of this vector.
+	 */
+	Vector<T> normalize() {
+		return this.scale(this.abs());
+	}
+
+	/**
+	 * Compute the dot product of two vectors.
+	 * @param vec The other vectors
+	 * @return The dot product of the two vectors.
+	 */
+	abstract double dot(T vec);
+}

math/src/main/java/com/dumbdogdiner/stickyapi/math/vector/Vector2.java

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+/*
+ * Copyright (c) 2020-2021 DumbDogDiner <dumbdogdiner.com>. All rights reserved.
+ * Licensed under the MIT license, see LICENSE for more information...
+ */
+package com.dumbdogdiner.stickyapi.math.vector;
+
+import lombok.Getter;
+
+/**
+ * Represents a two dimensional vector.
+ */
+public class Vector2 extends Vector<Vector2> {
+	/**
+	 * The x value of this vector.
+	 */
+	@Getter
+	private double x;
+
+	/**
+	 * The y value of this vector.
+	 */
+	@Getter
+	private double y;
+
+	/**
+	 * Construct a new 2D vector.
+	 * @param x The x value
+	 * @param y The y value
+	 */
+	public Vector2(double x, double y) {
+		this.x = x;
+		this.y = y;
+	}
+
+	@Override
+	int getDimensions() {
+		return 2;
+	}
+
+	@Override
+	Vector<Vector2> add(Vector<Vector2> vector) {
+		return new Vector2(this.x + vector.x, this.y + vector.y);
+	}
+
+	@Override
+	Vector<Vector2> subtract(Vector<Vector2> vector) {
+		return null;
+	}
+
+	@Override
+	Vector2 scale(Number scalar) {
+		return new Vector2(this.x * scalar.doubleValue(), this.y * scalar.doubleValue());
+	}
+
+	@Override
+	double abs() {
+		return Math.sqrt(Math.pow(this.x, 2) + Math.pow(this.y, 2));
+	}
+
+	@Override
+	double dot(Vector2 vec) {
+		return this.x * vec.x + this.y * vec.y;
+	}
+}