Fix T98718: Face Is Planar Node Not handling Certain Conditions

The comparison between dot products of each point of the poly were
not taking into consideration negative values. FLT_MIN was used rather
than -FLT_MAX due to a misunderstanding of the FLT_MIN definition.

Maniphest Tasks: T98718

Differential Revision: https://developer.blender.org/D15161

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/nodes/geometry/nodes/node_geo_input_mesh_face_is_planar.cc b/source/blender/nodes/geometry/nodes/node_geo_input_mesh_face_is_planar.cc
index 62af0476057..63890c1515a 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_input_mesh_face_is_planar.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_input_mesh_face_is_planar.cc
@@ -65,7 +65,7 @@ class PlanarFieldInput final : public GeometryFieldInput {
       float3 reference_normal = poly_normals[i_poly];
 
       float min = FLT_MAX;
-      float max = FLT_MIN;
+      float max = -FLT_MAX;
 
       for (const int i_loop : poly_loops.index_range()) {
         const float3 vert = mesh->mvert[poly_loops[i_loop].v].co;