+void GeometryTest::testBoxBoxIntersection() {
+ AABB box{ { -1, -1, -1 }, { 1, 1, 1 } }; // 2x2x2 cube centered around origin
+ glm::mat4 Ma(1); // identity
+ glm::mat4 Mb(1); // identity
+ // they're identical, so should probably intersect ^^
+
+ CPPUNIT_ASSERT_MESSAGE(
+ "identical OBBs don't intersect",
+ Intersection(box, Ma, box, Mb)
+ );
+
+ Ma = glm::translate(glm::vec3(-2, 0, 0)); // 2 to the left
+ Mb = glm::translate(glm::vec3(2, 0, 0)); // 2 to the right
+ CPPUNIT_ASSERT_MESSAGE(
+ "distant OBBs intersect (2 apart, no rotation)",
+ !Intersection(box, Ma, box, Mb)
+ );
+
+ Ma = glm::rotate(PI_0p25, glm::vec3(0, 0, 1)); // rotated 45° around Z
+ Mb = glm::translate(glm::vec3(2.4, 0, 0)); // 2.4 to the right
+ // they should barely touch. intersect by about 0.01 if my head works
+ CPPUNIT_ASSERT_MESSAGE(
+ "OBBs don't intersect (one rotated by 45°)",
+ Intersection(box, Ma, box, Mb)
+ );
+
+ Mb = glm::translate(glm::vec3(3, 0, 0)); // 3 to the right
+ CPPUNIT_ASSERT_MESSAGE(
+ "OBBs intersect (one rotated by 45°)",
+ !Intersection(box, Ma, box, Mb)
+ );
+}
+