[commons-geometry] 01/04: GEOMETRY-43 adds a test -> line intersecting cube. Line lies on plane. One intersection only.

[erans]

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commit a64641d70b64f03c132e34435b65e06c92f6be4f
Author: Sven Rathgeber <sven.rathge...@dfs.de>
AuthorDate: Tue Feb 5 15:27:23 2019 +0100

    GEOMETRY-43 adds a test -> line intersecting cube. Line lies on plane. One 
intersection only.
---
 .../euclidean/threed/PolyhedronsSetTest.java       | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git 
a/commons-geometry-euclidean/src/test/java/org/apache/commons/geometry/euclidean/threed/PolyhedronsSetTest.java
 
b/commons-geometry-euclidean/src/test/java/org/apache/commons/geometry/euclidean/threed/PolyhedronsSetTest.java
index c2c528b..dc1859c 100644
--- 
a/commons-geometry-euclidean/src/test/java/org/apache/commons/geometry/euclidean/threed/PolyhedronsSetTest.java
+++ 
b/commons-geometry-euclidean/src/test/java/org/apache/commons/geometry/euclidean/threed/PolyhedronsSetTest.java
@@ -932,6 +932,34 @@ public class PolyhedronsSetTest {
                 ((Plane) 
downFromCenterResult.getHyperplane()).intersection(downDiagonal), TEST_EPS);
     }
 
+    @Test
+    public void testFirstIntersection_linesPassThroughBoundaries2() {
+        // arrange - setup box
+        Vector3D lowerCorner = Vector3D.ZERO;
+        Vector3D upperCorner = Vector3D.of(1, 1, 1);
+        Vector3D center = lowerCorner.lerp(upperCorner, 0.5);
+        List<SubHyperplane<Vector3D>> boundaries = createBoxBoundaries(center, 
1.0, TEST_EPS);
+        PolyhedronsSet polySet = new PolyhedronsSet(boundaries, 
TEST_PRECISION);
+
+        Vector3D firstPointOnLine = Vector3D.of(0.5, -1.0, 0);
+        Vector3D secondPointOnLine = Vector3D.of(0.5, 2.0, 0);
+        Line bottomLine = new Line(firstPointOnLine, secondPointOnLine, 
TEST_PRECISION);
+
+        Vector3D expectedIntersection1 = Vector3D.of(0.5, 0, 0.0);
+        Vector3D expectedIntersection2 = Vector3D.of(0.5, 1.0, 0.0);
+
+        // act/assert
+        SubPlane bottom = (SubPlane) 
polySet.firstIntersection(firstPointOnLine, bottomLine);
+        Assert.assertNotNull(bottom);
+        EuclideanTestUtils.assertCoordinatesEqual(expectedIntersection1,
+                ((Plane) bottom.getHyperplane()).intersection(bottomLine), 
TEST_EPS);
+
+        bottom = (SubPlane) polySet.firstIntersection(Vector3D.of(0.5, 0.1, 
0.0), bottomLine);
+        Assert.assertNotNull(bottom);
+        Vector3D intersection = ((Plane) 
bottom.getHyperplane()).intersection(bottomLine);
+        Assert.assertNotNull(intersection);
+        EuclideanTestUtils.assertCoordinatesEqual(expectedIntersection2, 
intersection, TEST_EPS);
+    }
 
     // Issue 1211
     // See https://issues.apache.org/jira/browse/MATH-1211