[DEV] missing file

src/org/atriasoft/ege/geometry/Plane.java

@@ -0,0 +1,38 @@
+package org.atriasoft.ege.geometry;
+
+import org.atriasoft.etk.math.Vector3f;
+
+public record Plane(
+		Vector3f normal,
+		Vector3f point) {
+	public Plane(Triangle tri) {
+		this(tri.getNormal(), tri.getCenter());
+	}
+	
+	public Plane(Vector3f p1, Vector3f p2, Vector3f p3) {
+		this(Triangle.getNormal(p1, p2, p3), Triangle.getCenter(p1, p2, p3));
+	}
+	
+	public float distance(Vector3f point) {
+		return this.normal.dot(point.less(this.point));
+	}
+	
+	/**
+	 * Determines the point of intersection between the plane and a line defined by a point and a direction vector.
+	 *
+	 * @param linePoint     A point on the line.
+	 * @param lineDirection The direction Vector3f of the line.
+	 * @return The point of intersection between the line and the plane, null if the line is parallel to the plane.
+	 */
+	public Vector3f lineIntersectionPoint(Vector3f linePoint, Vector3f lineDirection) {
+		if (this.normal.dot(lineDirection.normalize()) == 0) {
+			return null;
+		}
+		float t = (this.normal.dot(this.point) - this.normal.dot(linePoint)) / this.normal.dot(lineDirection.normalize());
+		return linePoint.add(lineDirection.normalize().multiply(t));
+	}
+	
+	public Vector3f minimalIntersectionPoint(Vector3f point) {
+		return lineIntersectionPoint(point, this.normal.multiply(-1.0f));
+	}
+}