Geometry Nodes: Bounding Box Node

This commit adds a simple node to output the min and max of an
axis-aligned bounding box for the input geometry, as well a rectangular
prism mesh created from these values for convenience.

The initial use case for this node is a "bounding box boolean", where
doing the boolean with just a bounding box could be signigicantly
faster, for cases like cutting a hole in a wall for a window. But it's
easy to imagine other cases where it could be useful.

This node supports mesh and point cloud data right now, volume support
will come as a separate patch. Also note that there is plenty of room
to improve the performance of this node through parallelization.

Differential Revision: https://developer.blender.org/D10420

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/nodes/geometry/node_geometry_util.hh b/source/blender/nodes/geometry/node_geometry_util.hh
index fb80bd08797..ad4f4331b6c 100644
--- a/source/blender/nodes/geometry/node_geometry_util.hh
+++ b/source/blender/nodes/geometry/node_geometry_util.hh
@@ -58,4 +58,6 @@ Mesh *create_cylinder_or_cone_mesh(const float radius_top,
                                    const int verts_num,
                                    const GeometryNodeMeshCircleFillType fill_type);
 
+Mesh *create_cube_mesh(const float size);
+
 }  // namespace blender::nodes