Cleanup: Add macro and functions for node storage

The `node_storage` functions to retrieve const and mutable structs
from a node are generated by a short macro that can be placed at the
top of each relevant file. I use this in D8286 to make code snippets
in the socket declarations much shorter, but I thought it would be
good to use it consistently everywhere else too.

The functions are also useful to avoid copy and paste errors,
like the one corrected in the cylinder node in this commit.

Differential Revision: https://developer.blender.org/D13491

1 files changed, 6 insertions, 4 deletions

diff --git a/source/blender/nodes/geometry/nodes/node_geo_curve_trim.cc b/source/blender/nodes/geometry/nodes/node_geo_curve_trim.cc
index 127164b0ab0..449d0d14092 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_curve_trim.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_curve_trim.cc
@@ -26,6 +26,8 @@ namespace blender::nodes::node_geo_curve_trim_cc {
 
 using blender::attribute_math::mix2;
 
+NODE_STORAGE_FUNCS(NodeGeometryCurveTrim)
+
 static void node_declare(NodeDeclarationBuilder &b)
 {
   b.add_input<decl::Geometry>(N_("Curve")).supported_type(GEO_COMPONENT_TYPE_CURVE);
@@ -64,8 +66,8 @@ static void node_init(bNodeTree *UNUSED(tree), bNode *node)
 
 static void node_update(bNodeTree *ntree, bNode *node)
 {
-  const NodeGeometryCurveTrim &node_storage = *(NodeGeometryCurveTrim *)node->storage;
-  const GeometryNodeCurveSampleMode mode = (GeometryNodeCurveSampleMode)node_storage.mode;
+  const NodeGeometryCurveTrim &storage = node_storage(*node);
+  const GeometryNodeCurveSampleMode mode = (GeometryNodeCurveSampleMode)storage.mode;
 
   bNodeSocket *start_fac = ((bNodeSocket *)node->inputs.first)->next;
   bNodeSocket *end_fac = start_fac->next;
@@ -534,8 +536,8 @@ static void geometry_set_curve_trim(GeometrySet &geometry_set,
 
 static void node_geo_exec(GeoNodeExecParams params)
 {
-  const NodeGeometryCurveTrim &node_storage = *(NodeGeometryCurveTrim *)params.node().storage;
-  const GeometryNodeCurveSampleMode mode = (GeometryNodeCurveSampleMode)node_storage.mode;
+  const NodeGeometryCurveTrim &storage = node_storage(params.node());
+  const GeometryNodeCurveSampleMode mode = (GeometryNodeCurveSampleMode)storage.mode;
 
   GeometrySet geometry_set = params.extract_input<GeometrySet>("Curve");