diff options
| -rw-r--r-- | core/math/convex_hull.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/core/math/convex_hull.cpp b/core/math/convex_hull.cpp index 682a7ea39e..21cb0efe20 100644 --- a/core/math/convex_hull.cpp +++ b/core/math/convex_hull.cpp @@ -2278,9 +2278,18 @@ Error ConvexHullComputer::convex_hull(const Vector<Vector3> &p_points, Geometry3 e = e->get_next_edge_of_face(); } while (e != e_start); + // reverse indices: Godot wants clockwise, but this is counter-clockwise + if (face.indices.size() > 2) { + // reverse all but the first index. + int *indices = face.indices.ptrw(); + for (int c = 0; c < (face.indices.size() - 1) / 2; c++) { + SWAP(indices[c + 1], indices[face.indices.size() - 1 - c]); + } + } + // compute normal if (face.indices.size() >= 3) { - face.plane = Plane(r_mesh.vertices[face.indices[0]], r_mesh.vertices[face.indices[2]], r_mesh.vertices[face.indices[1]]); + face.plane = Plane(r_mesh.vertices[face.indices[0]], r_mesh.vertices[face.indices[1]], r_mesh.vertices[face.indices[2]]); } else { WARN_PRINT("Too few vertices per face."); } |