added bucket options tool

src/node_tool_bucket.cpp

@@ -0,0 +1,31 @@
+#include "pch.h"
+#include "node_tool_bucket.h"
+
+Node* NodeToolBucket::clone_instantiate() const
+{
+    return new this_class;
+}
+
+void NodeToolBucket::clone_finalize(Node* dest) const
+{
+    parent::clone_finalize(dest);
+    auto n = static_cast<this_class*>(dest);
+    n->init_controls();
+}
+
+void NodeToolBucket::init()
+{
+    parent::init();
+    init_template("tpl-tool-bucket");
+    init_controls();
+}
+
+void NodeToolBucket::init_controls()
+{
+    m_slider_threshold = find<NodeSliderH>("threshold");
+}
+
+float NodeToolBucket::get_threshold() const
+{
+    return glm::max(1.f, m_slider_threshold->get_value() * 255.f);
+}