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path: root/source/blender/nodes/geometry/nodes/legacy/node_geo_legacy_align_rotation_to_vector.cc
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-rw-r--r--source/blender/nodes/geometry/nodes/legacy/node_geo_legacy_align_rotation_to_vector.cc243
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diff --git a/source/blender/nodes/geometry/nodes/legacy/node_geo_legacy_align_rotation_to_vector.cc b/source/blender/nodes/geometry/nodes/legacy/node_geo_legacy_align_rotation_to_vector.cc
new file mode 100644
index 00000000000..4366c6f9234
--- /dev/null
+++ b/source/blender/nodes/geometry/nodes/legacy/node_geo_legacy_align_rotation_to_vector.cc
@@ -0,0 +1,243 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "BLI_math_rotation.h"
+#include "BLI_task.hh"
+
+#include "UI_interface.h"
+#include "UI_resources.h"
+
+#include "node_geometry_util.hh"
+
+namespace blender::nodes::node_geo_legacy_align_rotation_to_vector_cc {
+
+static void node_declare(NodeDeclarationBuilder &b)
+{
+ b.add_input<decl::Geometry>(N_("Geometry"));
+ b.add_input<decl::String>(N_("Factor"));
+ b.add_input<decl::Float>(N_("Factor"), "Factor_001")
+ .default_value(1.0f)
+ .min(0.0f)
+ .max(1.0f)
+ .subtype(PROP_FACTOR);
+ b.add_input<decl::String>(N_("Vector"));
+ b.add_input<decl::Vector>(N_("Vector"), "Vector_001")
+ .default_value({0.0, 0.0, 1.0})
+ .subtype(PROP_ANGLE);
+ b.add_output<decl::Geometry>(N_("Geometry"));
+}
+
+static void node_layout(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
+{
+ uiItemR(layout, ptr, "axis", UI_ITEM_R_EXPAND, nullptr, ICON_NONE);
+ uiLayoutSetPropSep(layout, true);
+ uiLayoutSetPropDecorate(layout, false);
+ uiItemR(layout, ptr, "pivot_axis", 0, IFACE_("Pivot"), ICON_NONE);
+ uiLayout *col = uiLayoutColumn(layout, false);
+ uiItemR(col, ptr, "input_type_factor", 0, IFACE_("Factor"), ICON_NONE);
+ uiItemR(col, ptr, "input_type_vector", 0, IFACE_("Vector"), ICON_NONE);
+}
+
+static void node_init(bNodeTree *UNUSED(ntree), bNode *node)
+{
+ NodeGeometryAlignRotationToVector *node_storage = (NodeGeometryAlignRotationToVector *)
+ MEM_callocN(sizeof(NodeGeometryAlignRotationToVector), __func__);
+
+ node_storage->axis = GEO_NODE_ALIGN_ROTATION_TO_VECTOR_AXIS_X;
+ node_storage->input_type_factor = GEO_NODE_ATTRIBUTE_INPUT_FLOAT;
+ node_storage->input_type_vector = GEO_NODE_ATTRIBUTE_INPUT_VECTOR;
+
+ node->storage = node_storage;
+}
+
+static void node_update(bNodeTree *ntree, bNode *node)
+{
+ NodeGeometryAlignRotationToVector *node_storage = (NodeGeometryAlignRotationToVector *)
+ node->storage;
+ update_attribute_input_socket_availabilities(
+ *ntree, *node, "Factor", (GeometryNodeAttributeInputMode)node_storage->input_type_factor);
+ update_attribute_input_socket_availabilities(
+ *ntree, *node, "Vector", (GeometryNodeAttributeInputMode)node_storage->input_type_vector);
+}
+
+static void align_rotations_auto_pivot(const VArray<float3> &vectors,
+ const VArray<float> &factors,
+ const float3 local_main_axis,
+ const MutableSpan<float3> rotations)
+{
+ threading::parallel_for(IndexRange(vectors.size()), 128, [&](IndexRange range) {
+ for (const int i : range) {
+ const float3 vector = vectors[i];
+ if (is_zero_v3(vector)) {
+ continue;
+ }
+
+ float old_rotation[3][3];
+ eul_to_mat3(old_rotation, rotations[i]);
+ float3 old_axis;
+ mul_v3_m3v3(old_axis, old_rotation, local_main_axis);
+
+ const float3 new_axis = vector.normalized();
+ float3 rotation_axis = float3::cross_high_precision(old_axis, new_axis);
+ if (is_zero_v3(rotation_axis)) {
+ /* The vectors are linearly dependent, so we fall back to another axis. */
+ rotation_axis = float3::cross_high_precision(old_axis, float3(1, 0, 0));
+ if (is_zero_v3(rotation_axis)) {
+ /* This is now guaranteed to not be zero. */
+ rotation_axis = float3::cross_high_precision(old_axis, float3(0, 1, 0));
+ }
+ }
+
+ const float full_angle = angle_normalized_v3v3(old_axis, new_axis);
+ const float angle = factors[i] * full_angle;
+
+ float rotation[3][3];
+ axis_angle_to_mat3(rotation, rotation_axis, angle);
+
+ float new_rotation_matrix[3][3];
+ mul_m3_m3m3(new_rotation_matrix, rotation, old_rotation);
+
+ float3 new_rotation;
+ mat3_to_eul(new_rotation, new_rotation_matrix);
+
+ rotations[i] = new_rotation;
+ }
+ });
+}
+
+static void align_rotations_fixed_pivot(const VArray<float3> &vectors,
+ const VArray<float> &factors,
+ const float3 local_main_axis,
+ const float3 local_pivot_axis,
+ const MutableSpan<float3> rotations)
+{
+ if (local_main_axis == local_pivot_axis) {
+ /* Can't compute any meaningful rotation angle in this case. */
+ return;
+ }
+
+ threading::parallel_for(IndexRange(vectors.size()), 128, [&](IndexRange range) {
+ for (const int i : range) {
+ const float3 vector = vectors[i];
+ if (is_zero_v3(vector)) {
+ continue;
+ }
+
+ float old_rotation[3][3];
+ eul_to_mat3(old_rotation, rotations[i]);
+ float3 old_axis;
+ mul_v3_m3v3(old_axis, old_rotation, local_main_axis);
+ float3 pivot_axis;
+ mul_v3_m3v3(pivot_axis, old_rotation, local_pivot_axis);
+
+ float full_angle = angle_signed_on_axis_v3v3_v3(vector, old_axis, pivot_axis);
+ if (full_angle > M_PI) {
+ /* Make sure the point is rotated as little as possible. */
+ full_angle -= 2.0f * M_PI;
+ }
+ const float angle = factors[i] * full_angle;
+
+ float rotation[3][3];
+ axis_angle_to_mat3(rotation, pivot_axis, angle);
+
+ float new_rotation_matrix[3][3];
+ mul_m3_m3m3(new_rotation_matrix, rotation, old_rotation);
+
+ float3 new_rotation;
+ mat3_to_eul(new_rotation, new_rotation_matrix);
+
+ rotations[i] = new_rotation;
+ }
+ });
+}
+
+static void align_rotations_on_component(GeometryComponent &component,
+ const GeoNodeExecParams &params)
+{
+ const bNode &node = params.node();
+ const NodeGeometryAlignRotationToVector &storage = *(const NodeGeometryAlignRotationToVector *)
+ node.storage;
+
+ OutputAttribute_Typed<float3> rotations = component.attribute_try_get_for_output<float3>(
+ "rotation", ATTR_DOMAIN_POINT, {0, 0, 0});
+ if (!rotations) {
+ return;
+ }
+
+ VArray<float> factors = params.get_input_attribute<float>(
+ "Factor", component, ATTR_DOMAIN_POINT, 1.0f);
+ VArray<float3> vectors = params.get_input_attribute<float3>(
+ "Vector", component, ATTR_DOMAIN_POINT, {0, 0, 1});
+
+ float3 local_main_axis{0, 0, 0};
+ local_main_axis[storage.axis] = 1;
+ if (storage.pivot_axis == GEO_NODE_ALIGN_ROTATION_TO_VECTOR_PIVOT_AXIS_AUTO) {
+ align_rotations_auto_pivot(vectors, factors, local_main_axis, rotations.as_span());
+ }
+ else {
+ float3 local_pivot_axis{0, 0, 0};
+ local_pivot_axis[storage.pivot_axis - 1] = 1;
+ align_rotations_fixed_pivot(
+ vectors, factors, local_main_axis, local_pivot_axis, rotations.as_span());
+ }
+
+ rotations.save();
+}
+
+static void node_geo_exec(GeoNodeExecParams params)
+{
+ GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
+
+ geometry_set = geometry::realize_instances_legacy(geometry_set);
+
+ if (geometry_set.has<MeshComponent>()) {
+ align_rotations_on_component(geometry_set.get_component_for_write<MeshComponent>(), params);
+ }
+ if (geometry_set.has<PointCloudComponent>()) {
+ align_rotations_on_component(geometry_set.get_component_for_write<PointCloudComponent>(),
+ params);
+ }
+ if (geometry_set.has<CurveComponent>()) {
+ align_rotations_on_component(geometry_set.get_component_for_write<CurveComponent>(), params);
+ }
+
+ params.set_output("Geometry", geometry_set);
+}
+
+} // namespace blender::nodes::node_geo_legacy_align_rotation_to_vector_cc
+
+void register_node_type_geo_align_rotation_to_vector()
+{
+ namespace file_ns = blender::nodes::node_geo_legacy_align_rotation_to_vector_cc;
+
+ static bNodeType ntype;
+
+ geo_node_type_base(&ntype,
+ GEO_NODE_LEGACY_ALIGN_ROTATION_TO_VECTOR,
+ "Align Rotation to Vector",
+ NODE_CLASS_GEOMETRY,
+ 0);
+ node_type_init(&ntype, file_ns::node_init);
+ node_type_update(&ntype, file_ns::node_update);
+ node_type_storage(&ntype,
+ "NodeGeometryAlignRotationToVector",
+ node_free_standard_storage,
+ node_copy_standard_storage);
+ ntype.declare = file_ns::node_declare;
+ ntype.geometry_node_execute = file_ns::node_geo_exec;
+ ntype.draw_buttons = file_ns::node_layout;
+ nodeRegisterType(&ntype);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-16 16:34:25 +0300