scripts/startup/bl_ui/node_add_menu_geometry.py

@@ -295,6 +295,8 @@ class NODE_MT_geometry_node_GEO_INPUT_SCENE(Menu):
         node_add_menu.add_node_type(layout, "GeometryNodeObjectInfo")
         node_add_menu.add_node_type(layout, "GeometryNodeInputSceneTime")
         node_add_menu.add_node_type(layout, "GeometryNodeSelfObject")
+        if context.space_data.geometry_nodes_type == 'TOOL':
+            node_add_menu.add_node_type(layout, "GeometryNodeViewportTransform")
         node_add_menu.draw_assets_for_catalog(layout, "Input/Scene")
 
 

source/blender/blenkernel/BKE_node.hh

@@ -1278,6 +1278,7 @@ void BKE_nodetree_remove_layer_n(bNodeTree *ntree, Scene *scene, int layer_index
 #define GEO_NODE_GRID_TO_MESH 2129
 #define GEO_NODE_DISTRIBUTE_POINTS_IN_GRID 2130
 #define GEO_NODE_SDF_GRID_BOOLEAN 2131
+#define GEO_NODE_TOOL_VIEWPORT_TRANSFORM 2132
 
 /** \} */
 

source/blender/editors/geometry/node_group_operator.cc

@@ -394,6 +394,7 @@ static int run_node_group_exec(bContext *C, wmOperator *op)
   Main *bmain = CTX_data_main(C);
   Scene *scene = CTX_data_scene(C);
   Object *active_object = CTX_data_active_object(C);
+  const RegionView3D *rv3d = CTX_wm_region_view3d(C);
   if (!active_object) {
     return OPERATOR_CANCELLED;
   }
@@ -470,6 +471,7 @@ static int run_node_group_exec(bContext *C, wmOperator *op)
     operator_eval_data.depsgraphs = &depsgraphs;
     operator_eval_data.self_object_orig = object;
     operator_eval_data.scene_orig = scene;
+    operator_eval_data.rv3d = rv3d;
 
     nodes::GeoNodesCallData call_data{};
     call_data.operator_data = &operator_eval_data;

source/blender/nodes/NOD_geometry_nodes_lazy_function.hh

@@ -190,6 +190,7 @@ struct GeoNodesOperatorData {
   const Object *self_object_orig = nullptr;
   const GeoNodesOperatorDepsgraphs *depsgraphs = nullptr;
   Scene *scene_orig = nullptr;
+  const RegionView3D *rv3d = nullptr;
 };
 
 struct GeoNodesCallData {

source/blender/nodes/NOD_static_types.h

@@ -469,6 +469,7 @@ DefNode(GeometryNode, GEO_NODE_TOOL_FACE_SET, 0, "TOOL_FACE_SET", ToolFaceSet, "
 DefNode(GeometryNode, GEO_NODE_TOOL_SELECTION, 0, "TOOL_SELECTION", ToolSelection, "Selection", "User selection of the edited geometry, for tool execution")
 DefNode(GeometryNode, GEO_NODE_TOOL_SET_FACE_SET, 0, "TOOL_SET_FACE_SET", ToolSetFaceSet, "Set Face Set", "Set sculpt face set values for faces")
 DefNode(GeometryNode, GEO_NODE_TOOL_SET_SELECTION, 0, "TOOL_SELECTION_SET", ToolSetSelection, "Set Selection", "Set selection of the edited geometry, for tool execution")
+DefNode(GeometryNode, GEO_NODE_TOOL_VIEWPORT_TRANSFORM, 0, "VIEWPORT_TRANFORM", ViewportTransform, "Viewport Transform", "Retrieve the view direction and location of the 3D viewport")
 DefNode(GeometryNode, GEO_NODE_TRANSFORM_GEOMETRY, 0, "TRANSFORM_GEOMETRY", Transform, "Transform Geometry", "Translate, rotate or scale the geometry")
 DefNode(GeometryNode, GEO_NODE_TRANSLATE_INSTANCES, 0, "TRANSLATE_INSTANCES",TranslateInstances, "Translate Instances", "Move top-level geometry instances in local or global space")
 DefNode(GeometryNode, GEO_NODE_TRIANGULATE, 0, "TRIANGULATE", Triangulate, "Triangulate", "Convert all faces in a mesh to triangular faces")

source/blender/nodes/geometry/CMakeLists.txt

@@ -205,6 +205,7 @@ set(SRC
   nodes/node_geo_uv_pack_islands.cc
   nodes/node_geo_uv_unwrap.cc
   nodes/node_geo_viewer.cc
+  nodes/node_geo_viewport_transform.cc
   nodes/node_geo_volume_cube.cc
   nodes/node_geo_volume_to_mesh.cc
 

source/blender/nodes/geometry/nodes/node_geo_viewport_transform.cc

@@ -0,0 +1,51 @@
+/* SPDX-FileCopyrightText: 2024 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "DNA_view3d_types.h"
+
+#include "BLI_math_matrix.hh"
+
+#include "node_geometry_util.hh"
+
+namespace blender::nodes::node_geo_viewport_transform_cc {
+
+static void node_declare(NodeDeclarationBuilder &b)
+{
+  b.add_output<decl::Matrix>("Projection")
+      .description("The 3D viewport's perspective or orthographic projection matrix");
+  b.add_output<decl::Matrix>("View").description(
+      "The view direction and location of the 3D viewport");
+  b.add_output<decl::Bool>("Is Orthographic")
+      .description("Whether the viewport is using orthographic projection");
+}
+
+static void node_geo_exec(GeoNodeExecParams params)
+{
+  if (!check_tool_context_and_error(params)) {
+    return;
+  }
+  const Object &self_object = *params.self_object();
+  const RegionView3D *rv3d = params.user_data()->call_data->operator_data->rv3d;
+  if (!rv3d) {
+    params.set_default_remaining_outputs();
+    return;
+  }
+  params.set_output("Projection", float4x4(rv3d->winmat) * self_object.object_to_world());
+  params.set_output("View", float4x4(rv3d->viewmat) * self_object.object_to_world());
+  params.set_output("Is Orthographic", !bool(rv3d->is_persp));
+}
+
+static void node_register()
+{
+  static bNodeType ntype;
+  geo_node_type_base(
+      &ntype, GEO_NODE_TOOL_VIEWPORT_TRANSFORM, "Viewport Transform", NODE_CLASS_INPUT);
+  ntype.declare = node_declare;
+  ntype.geometry_node_execute = node_geo_exec;
+  ntype.gather_link_search_ops = search_link_ops_for_tool_node;
+  nodeRegisterType(&ntype);
+}
+NOD_REGISTER_NODE(node_register)
+
+}  // namespace blender::nodes::node_geo_viewport_transform_cc