implementing color wheel and new color picker

engine/node_colorwheel.h

@@ -0,0 +1,22 @@
+#pragma once
+#include "util.h"
+#include "node.h"
+#include "shape.h"
+#include "node_slider.h"
+
+class NodeColorWheel : public Node
+{
+public:
+    ui::Circle m_circle;
+    ui::Circle m_cur_hue;
+    GLuint m_tri_vbo;
+    GLuint m_tri_vao;
+    GLuint buffers;
+    GLuint arrays;
+    virtual Node* clone_instantiate() const override;
+    virtual void clone_finalize(Node* dest) const;
+    virtual void init() override;
+    virtual void loaded() override;
+    virtual void draw() override;
+    void init_controls();
+};