1 files changed, 50 insertions, 0 deletions
diff --git a/šola/p1/dn/Premica.java b/šola/p1/dn/Premica.java
new file mode 100644
index 0000000..2d2ec4e
--- /dev/null
+++ b/šola/p1/dn/Premica.java
@@ -0,0 +1,50 @@
+import java.util.*;
+public class Premica {
+	private double k;
+	private double n;
+	public Premica(double k, double n) {
+		this.k = k;
+		this.n = n;
+	}
+	public double vrniK() {
+		return this.k;
+	}
+	public double vrniN() {
+		return this.n;
+	}
+	public String toString() {
+		return String.format(Locale.ROOT, "y = %.2f x + %.2f", this.k, this.n);
+	}
+	public Tocka tockaPriX(double x) {
+		return new Tocka(x, this.k*x+this.n);
+	}
+	public static Premica skoziTocko(double k, Tocka t) {
+		return new Premica(k, t.vrniY()-k*t.vrniX());
+	}
+
+	public Premica vzporednica(Tocka t) {
+		return skoziTocko(this.k, t);
+	}
+
+	public Premica pravokotnica(Tocka t) {
+		return skoziTocko(-1/this.k, t);
+	}
+
+	public Tocka presecisce(Premica p, double epsilon) {
+		if (Math.abs(this.k - p.vrniK()) < epsilon)
+			return null;
+		return tockaPriX((this.n-p.vrniN())/(p.vrniK()-this.k));
+	}
+	public Tocka projekcija(Tocka t) {
+		return presecisce(pravokotnica(t), 0);
+	}
+	public double razdalja(Tocka t) {
+		return t.razdalja(projekcija(t));
+	}
+	public double razdaljaOdIzhodisca() {
+		return Tocka.izhodisce().razdalja(projekcija(Tocka.izhodisce()));
+	}
+	public double razdalja(double n) {
+		return new Premica(this.k, n).razdalja(tockaPriX(0));
+	}
+}