Geometry Nodes: Rename Curve Parameter, Add Index on Spline

  - Rename the Curve Parameter node to Spline Parameter.
  - Add "Index on Spline" to the node. This output is the index of
the current point on it's parent spline rather than the entrire curve.

Differential Revision: https://developer.blender.org/D13275

3 files changed, 36 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/versioning_300.c b/source/blender/blenloader/intern/versioning_300.c
index 068541a5825..295084cd62f 100644
--- a/source/blender/blenloader/intern/versioning_300.c
+++ b/source/blender/blenloader/intern/versioning_300.c
@@ -2404,6 +2404,19 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
    * \note Keep this message at the bottom of the function.
    */
   {
+    LISTBASE_FOREACH (bNodeTree *, ntree, &bmain->nodetrees) {
+      if (ntree->type != NTREE_GEOMETRY) {
+        continue;
+      }
+      version_node_id(ntree, GEO_NODE_CURVE_SPLINE_PARAMETER, "GeometryNodeSplineParameter");
+      LISTBASE_FOREACH (bNode *, node, &ntree->nodes) {
+        if (node->type == GEO_NODE_CURVE_SPLINE_PARAMETER) {
+          version_node_add_socket_if_not_exist(
+              ntree, node, SOCK_OUT, SOCK_INT, PROP_NONE, "Index", "Index");
+        }
+      }
+    }
+
     /* Keep this block, even when empty. */
   }
 }
diff --git a/source/blender/blenloader/intern/versioning_common.cc b/source/blender/blenloader/intern/versioning_common.cc
index ef275c56891..8ad948915ac 100644
--- a/source/blender/blenloader/intern/versioning_common.cc
+++ b/source/blender/blenloader/intern/versioning_common.cc
@@ -165,6 +165,21 @@ void version_node_output_socket_name(bNodeTree *ntree,
   }
 }
 
+bNodeSocket *version_node_add_socket_if_not_exist(bNodeTree *ntree,
+                                                  bNode *node,
+                                                  eNodeSocketInOut in_out,
+                                                  int type,
+                                                  int subtype,
+                                                  const char *identifier,
+                                                  const char *name)
+{
+  bNodeSocket *sock = nodeFindSocket(node, in_out, identifier);
+  if (sock != nullptr) {
+    return sock;
+  }
+  return nodeAddStaticSocket(ntree, node, in_out, type, subtype, identifier, name);
+}
+
 /**
  * Replace the ID name of all nodes in the tree with the given type with the new name.
  */
diff --git a/source/blender/blenloader/intern/versioning_common.h b/source/blender/blenloader/intern/versioning_common.h
index 7f179800ddd..3788d8f5595 100644
--- a/source/blender/blenloader/intern/versioning_common.h
+++ b/source/blender/blenloader/intern/versioning_common.h
@@ -64,6 +64,14 @@ void version_node_id(struct bNodeTree *ntree, const int node_type, const char *n
 
 void version_node_socket_id_delim(bNodeSocket *socket);
 
+struct bNodeSocket *version_node_add_socket_if_not_exist(struct bNodeTree *ntree,
+                                                         struct bNode *node,
+                                                         eNodeSocketInOut in_out,
+                                                         int type,
+                                                         int subtype,
+                                                         const char *identifier,
+                                                         const char *name);
+
 #ifdef __cplusplus
 }
 #endif