Geometry Nodes: Curve tangent node

This node outputs the direction vector, or tangent of a curve at every
control point. For poly splines this is simply the evaluated tangents,
so it all works very simply. For Bezier splines it uses the tangent at
the evaluated point corresponding to each control point, and NURBS
are interpereted as poly splines built from their control points.

Internally the node is called "Input Tangent" to simplify using it for
mesh tangents as well in the future like the "Normal" node.

Differential Revision: https://developer.blender.org/D12581

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/nodes/NOD_geometry.h b/source/blender/nodes/NOD_geometry.h
index 63330b7df62..013ec638b82 100644
--- a/source/blender/nodes/NOD_geometry.h
+++ b/source/blender/nodes/NOD_geometry.h
@@ -81,6 +81,7 @@ void register_node_type_geo_input_index(void);
 void register_node_type_geo_input_material(void);
 void register_node_type_geo_input_normal(void);
 void register_node_type_geo_input_position(void);
+void register_node_type_geo_input_tangent(void);
 void register_node_type_geo_is_viewport(void);
 void register_node_type_geo_join_geometry(void);
 void register_node_type_geo_material_assign(void);