Geometry Nodes: Rotate Instances Node
Adds a node that can rotate each of a geometry's instances in global (to the modifier object) or local space (of each point) by a specified angle around a pivot point. In the future, separating the local-global choice for the pivot and the rotation might be useful. However, for now the node is kept simple. Differential Revision: https://developer.blender.org/D12682
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Notes:
blender-bot
2023-02-14 10:29:32 +01:00
Referenced by issue #91653, Rotate Instances node
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@ -683,6 +683,7 @@ geometry_node_categories = [
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NodeItem("GeometryNodeSeparateGeometry"),
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NodeItem("GeometryNodeSetPosition"),
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NodeItem("GeometryNodeRealizeInstances"),
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NodeItem("GeometryNodeRotateInstances"),
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NodeItem("GeometryNodeScaleInstances"),
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NodeItem("GeometryNodeTranslateInstances"),
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]),
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@ -1534,6 +1534,7 @@ int ntreeTexExecTree(struct bNodeTree *ntree,
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#define GEO_NODE_SET_MATERIAL_INDEX 1119
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#define GEO_NODE_TRANSLATE_INSTANCES 1120
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#define GEO_NODE_SCALE_INSTANCES 1121
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#define GEO_NODE_ROTATE_INSTANCES 1122
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/** \} */
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@ -5809,6 +5809,7 @@ static void registerGeometryNodes()
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register_node_type_geo_proximity();
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register_node_type_geo_raycast();
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register_node_type_geo_realize_instances();
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register_node_type_geo_rotate_instances();
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register_node_type_geo_sample_texture();
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register_node_type_geo_scale_instances();
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register_node_type_geo_separate_components();
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@ -253,6 +253,7 @@ set(SRC
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geometry/nodes/node_geo_points_to_volume.cc
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geometry/nodes/node_geo_proximity.cc
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geometry/nodes/node_geo_realize_instances.cc
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geometry/nodes/node_geo_rotate_instances.cc
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geometry/nodes/node_geo_scale_instances.cc
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geometry/nodes/node_geo_separate_components.cc
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geometry/nodes/node_geo_separate_geometry.cc
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@ -129,6 +129,7 @@ void register_node_type_geo_points_to_volume(void);
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void register_node_type_geo_proximity(void);
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void register_node_type_geo_raycast(void);
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void register_node_type_geo_realize_instances(void);
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void register_node_type_geo_rotate_instances(void);
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void register_node_type_geo_sample_texture(void);
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void register_node_type_geo_scale_instances(void);
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void register_node_type_geo_select_by_handle_type(void);
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@ -381,6 +381,7 @@ DefNode(GeometryNode, GEO_NODE_POINTS_TO_VERTICES, 0, "POINTS_TO_VERTICES", Poin
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DefNode(GeometryNode, GEO_NODE_POINTS_TO_VOLUME, def_geo_points_to_volume, "POINTS_TO_VOLUME", PointsToVolume, "Points to Volume", "")
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DefNode(GeometryNode, GEO_NODE_PROXIMITY, def_geo_proximity, "PROXIMITY", Proximity, "Geometry Proximity", "")
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DefNode(GeometryNode, GEO_NODE_REALIZE_INSTANCES, 0, "REALIZE_INSTANCES", RealizeInstances, "Realize Instances", "")
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DefNode(GeometryNode, GEO_NODE_ROTATE_INSTANCES, 0, "ROTATE_INSTANCES", RotateInstances, "Rotate Instances", "")
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DefNode(GeometryNode, GEO_NODE_SCALE_INSTANCES, 0, "SCALE_INSTANCES", ScaleInstances, "Scale Instances", "")
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DefNode(GeometryNode, GEO_NODE_SEPARATE_COMPONENTS, 0, "SEPARATE_COMPONENTS", SeparateComponents, "Separate Components", "")
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DefNode(GeometryNode, GEO_NODE_SEPARATE_GEOMETRY, def_geo_separate_geometry, "SEPARATE_GEOMETRY", SeparateGeometry, "Separate Geometry", "")
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@ -0,0 +1,99 @@
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "BLI_task.hh"
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#include "node_geometry_util.hh"
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namespace blender::nodes {
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static void geo_node_rotate_instances_declare(NodeDeclarationBuilder &b)
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{
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b.add_input<decl::Geometry>("Geometry");
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b.add_input<decl::Bool>("Selection").default_value(true).hide_value().supports_field();
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b.add_input<decl::Vector>("Rotation").subtype(PROP_EULER).supports_field();
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b.add_input<decl::Vector>("Pivot Point").subtype(PROP_TRANSLATION).supports_field();
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b.add_input<decl::Bool>("Local Space").default_value(true).supports_field();
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b.add_output<decl::Geometry>("Geometry");
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};
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static void rotate_instances(GeoNodeExecParams ¶ms, InstancesComponent &instances_component)
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{
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GeometryComponentFieldContext field_context{instances_component, ATTR_DOMAIN_POINT};
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const int domain_size = instances_component.instances_amount();
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fn::FieldEvaluator selection_evaluator{field_context, domain_size};
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selection_evaluator.add(params.extract_input<Field<bool>>("Selection"));
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selection_evaluator.evaluate();
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const IndexMask selection = selection_evaluator.get_evaluated_as_mask(0);
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fn::FieldEvaluator transforms_evaluator{field_context, &selection};
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transforms_evaluator.add(params.extract_input<Field<float3>>("Rotation"));
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transforms_evaluator.add(params.extract_input<Field<float3>>("Pivot Point"));
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transforms_evaluator.add(params.extract_input<Field<bool>>("Local Space"));
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transforms_evaluator.evaluate();
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const VArray<float3> &rotations = transforms_evaluator.get_evaluated<float3>(0);
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const VArray<float3> &pivots = transforms_evaluator.get_evaluated<float3>(1);
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const VArray<bool> &local_spaces = transforms_evaluator.get_evaluated<bool>(2);
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MutableSpan<float4x4> instance_transforms = instances_component.instance_transforms();
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threading::parallel_for(selection.index_range(), 512, [&](IndexRange range) {
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for (const int i_selection : range) {
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const int i = selection[i_selection];
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const float3 pivot = pivots[i];
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float4x4 &instance_transform = instance_transforms[i];
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const float4x4 rotation_matrix = float4x4::from_loc_eul_scale(
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{0, 0, 0}, rotations[i], {1, 1, 1});
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if (local_spaces[i]) {
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instance_transform *= float4x4::from_location(pivot);
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instance_transform *= rotation_matrix;
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instance_transform *= float4x4::from_location(-pivot);
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}
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else {
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const float4x4 orgiginal_transform = instance_transform;
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instance_transform = float4x4::from_location(pivot);
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instance_transform *= rotation_matrix;
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instance_transform *= float4x4::from_location(-pivot);
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instance_transform *= orgiginal_transform;
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}
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}
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});
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}
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static void geo_node_rotate_instances_exec(GeoNodeExecParams params)
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{
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GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
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if (geometry_set.has_instances()) {
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InstancesComponent &instances = geometry_set.get_component_for_write<InstancesComponent>();
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rotate_instances(params, instances);
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}
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params.set_output("Geometry", std::move(geometry_set));
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}
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} // namespace blender::nodes
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void register_node_type_geo_rotate_instances()
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{
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static bNodeType ntype;
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geo_node_type_base(
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&ntype, GEO_NODE_ROTATE_INSTANCES, "Rotate Instances", NODE_CLASS_GEOMETRY, 0);
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ntype.geometry_node_execute = blender::nodes::geo_node_rotate_instances_exec;
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ntype.declare = blender::nodes::geo_node_rotate_instances_declare;
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nodeRegisterType(&ntype);
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}
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