feat: implemented point primitive gizmo

modules/terrain_editor/terrain_mesh_editor.cpp

@@ -0,0 +1,53 @@
+#include "terrain_mesh_editor.h"
+#include "scene/3d/node_3d.h"
+#include "scene/resources/packed_scene.h"
+#include "terrain_editor/macros.h"
+#include "terrain_editor/point_primitive_node.h"
+#include "terrain_editor/terrain_primitive.h"
+
+void TerrainMeshEditor::_bind_methods() {
+	BIND_HPROPERTY(Variant::OBJECT, point_primitive_object, PROPERTY_HINT_RESOURCE_TYPE, "PackedScene");
+}
+
+void TerrainMeshEditor::ready() {
+	connect(sig_primitive_list_changed, callable_mp(this, &self_type::on_primitive_list_changed));
+	on_primitive_list_changed(get_primitives());
+}
+
+void TerrainMeshEditor::on_primitive_list_changed(Array primitives) {
+	for (Node3D *existing : this->primitive_nodes) {
+		existing->queue_free();
+	}
+	this->primitive_nodes.clear();
+	for (Variant var : primitives) {
+		if (this->point_primitive_object.is_valid() && this->point_primitive_object->get_state()->get_node_type(0) == PointPrimitiveNode::get_class_static()) {
+			Ref<PointPrimitive> point{ var };
+			if (point.is_valid()) {
+				PointPrimitiveNode *primitive_node{ cast_to<PointPrimitiveNode>(this->point_primitive_object->instantiate()) };
+				primitive_node->set_primitive(point);
+				this->add_child(primitive_node);
+			}
+		}
+	}
+}
+
+void TerrainMeshEditor::_notification(int what) {
+	if (Engine::get_singleton()->is_editor_hint()) {
+		return;
+	}
+	switch (what) {
+		default:
+			return;
+		case NOTIFICATION_READY:
+			ready();
+			return;
+	}
+}
+
+void TerrainMeshEditor::set_point_primitive_object(Ref<PackedScene> scene) {
+	this->point_primitive_object = scene;
+}
+
+Ref<PackedScene> TerrainMeshEditor::get_point_primitive_object() const {
+	return this->point_primitive_object;
+}