Fix ghost collisions in segment_intersects_convex()

Author: Kaleb-Reid

core/math/geometry_3d.h

@@ -292,6 +292,10 @@ class Geometry3D {
 			real_t den = p.normal.dot(dir);
 
 			if (Math::abs(den) <= (real_t)CMP_EPSILON) {
+				if (p.is_point_over(p_from)) {
+					// p is a separating plane.
+					return false;
+				}
 				continue; // Ignore parallel plane.
 			}
 

tests/core/math/test_geometry_3d.h

@@ -160,6 +160,7 @@ TEST_CASE("[Geometry3D] Does Segment Intersect Convex") {
 	CHECK(Geometry3D::segment_intersects_convex(Vector3(10, 10, 10), Vector3(0, 0, 0), &box_planes[0], box_planes.size(), &result, &normal) == true);
 	CHECK(Geometry3D::segment_intersects_convex(Vector3(10, 10, 10), Vector3(5, 5, 5), &box_planes[0], box_planes.size(), &result, &normal) == true);
 	CHECK(Geometry3D::segment_intersects_convex(Vector3(10, 10, 10), Vector3(6, 5, 5), &box_planes[0], box_planes.size(), &result, &normal) == false);
+	CHECK(Geometry3D::segment_intersects_convex(Vector3(10, 10, 0), Vector3(10, 0, 0), &box_planes[0], box_planes.size(), &result, &normal) == false);
 }
 
 TEST_CASE("[Geometry3D] Segment Intersects Cylinder") {