Add simplification GUI

src/slic3r/GUI/Gizmos/GLGizmoSimplify.hpp

@@ -0,0 +1,76 @@
+#ifndef slic3r_GLGizmoSimplify_hpp_
+#define slic3r_GLGizmoSimplify_hpp_
+
+#include "GLGizmoBase.hpp"
+#include "libslic3r/Model.hpp"
+#include <thread>
+#include <optional>
+
+namespace Slic3r {
+namespace GUI {
+
+class GLGizmoSimplify : public GLGizmoBase
+{
+    enum class State {
+        settings,
+        simplifying, // start processing
+        canceling, // canceled
+        successfull, // successful simplified
+        close_on_end
+    } state;
+
+    bool is_valid_result; // differ what to do in apply
+
+    int progress;
+    
+    ModelVolume *volume;
+    size_t obj_index;
+    std::optional<indexed_triangle_set> original_its;
+
+    bool need_reload; // after simplify, glReload must be on main thread
+    std::thread worker;
+public:
+    GLGizmoSimplify(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id);
+    virtual ~GLGizmoSimplify();
+    void set_selectable(bool value);
+protected:
+    virtual bool on_init() override;
+    virtual std::string on_get_name() const override;
+    virtual void on_render() const override;
+    virtual void on_render_for_picking() const override;    
+    virtual void on_render_input_window(float x, float y, float bottom_limit) override;
+    virtual bool on_is_activable() const override;
+    virtual bool on_is_selectable() const override { return false; };
+
+private:
+    void close();
+    void process();
+    void set_its(indexed_triangle_set &its);
+    struct Configuration
+    {
+        bool use_count = true;
+        // minimal triangle count
+        float    wanted_percent = 50.f;
+        uint32_t wanted_count   = 0; // initialize by percents
+
+        bool use_error = false;
+        // maximal quadric error
+        float max_error = 1.;
+
+        void update_count(size_t triangle_count)
+        {
+            wanted_percent = (float) wanted_count / triangle_count * 100.f;
+        }
+        void update_percent(size_t triangle_count)
+        {
+            wanted_count = static_cast<uint32_t>(
+                std::round(triangle_count * wanted_percent / 100.f));
+        }
+    };
+    Configuration c;
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif // slic3r_GLGizmoSimplify_hpp_