Use fabs() instead of abs() (#5141)

diff --git a/src/mapblock_mesh.cpp b/src/mapblock_mesh.cpp
index 79d02d6ff035582c5d1eb98e7b4ddb5dcd282d87..2520b5459ad1c1361cafc7c42bc1e94de7967c03 100644 (file)
--- a/src/mapblock_mesh.cpp
+++ b/src/mapblock_mesh.cpp
@@ -1090,9 +1090,9 @@ MapBlockMesh::MapBlockMesh(MeshMakeData *data, v3s16 camera_offset):
                                brightness of vertices 1 and 3 differ less than
                                the brightness of vertices 0 and 2.
                        */
-                       if (abs(f.vertices[0].Color.getLuminance()
+                       if (fabs(f.vertices[0].Color.getLuminance()
                                        - f.vertices[2].Color.getLuminance())
-                                       > abs(f.vertices[1].Color.getLuminance()
+                                       > fabs(f.vertices[1].Color.getLuminance()
                                        - f.vertices[3].Color.getLuminance()))
                                indices_p = indices_alternate;