Tangent.java

package curves;

/**
 * Calculates a tangent
 * 
 * @author andy
 * 
 */
public class Tangent {

	private double[][] points;
	private double x;
	private double y;
	private double atan;
	private double cos;
	private double sin;
	private double twoDvector;

	public Tangent() {

	}

	public double getCos() {
		return cos;
	}

	public void setCos(double cos) {
		this.cos = cos;
	}

	public double getSin() {
		return sin;
	}

	public void setSin(double sin) {
		this.sin = sin;
	}

	public double getAtan() {
		return atan;
	}

	public void setAtan(double atan) {
		this.atan = atan;
	}

	public double getX() {
		return x;
	}

	public void setX(double x) {
		this.x = x;
	}

	public double getY() {
		return y;
	}

	public void setY(double y) {
		this.y = y;
	}

	public double[][] getPoints() {
		return points;
	}

	public void setPoints(double[][] points) {
		this.points = points;
	}

	public double gettwoDVector() {
		return twoDvector;
	}

	public void settwoDVector(double vector) {
		this.twoDvector = vector;
	}

	public void calculate() {
		double dy = points[0][1] - points[0][0];
		double dx = points[1][1] - points[1][0];

		double dif = dy / dx;
		double atan = Math.atan(dif);

		sin = Math.sin(dy / dx);
		cos = Math.cos(dx / dy);

		x = dx * cos;
		y = dy * sin;

		twoDvector = x + y;
	}
}