godot/tools/editor/plugins/shader_graph_editor_plugin.h

/*************************************************************************/
/*  shader_graph_editor_plugin.h                                         */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/*************************************************************************/
/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
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/*************************************************************************/
#ifndef SHADER_GRAPH_EDITOR_PLUGIN_H
#define SHADER_GRAPH_EDITOR_PLUGIN_H


#include "tools/editor/editor_plugin.h"
#include "tools/editor/editor_node.h"
#include "scene/resources/shader.h"
#include "servers/visual/shader_graph.h"
#include "scene/gui/tree.h"
#include "scene/gui/button.h"
#include "scene/gui/graph_edit.h"
#include "scene/gui/popup.h"
#include "tools/editor/property_editor.h"
#include "scene/resources/shader_graph.h"
/**
    @author Juan Linietsky <reduzio@gmail.com>
*/


class GraphColorRampEdit : public Control {

    OBJ_TYPE(GraphColorRampEdit,Control);


    struct Point {

        float offset;
        Color color;
        bool operator<(const Point& p_ponit) const {
            return offset<p_ponit.offset;
        }
    };

    PopupPanel *popup;
    ColorPicker *picker;


    bool grabbing;
    int grabbed;
    float grabbed_at;
    Vector<Point> points;

    void _color_changed(const Color& p_color);

protected:
    void _input_event(const InputEvent& p_event);
    void _notification(int p_what);
    static void _bind_methods();
public:

    void set_ramp(const Vector<float>& p_offsets,const Vector<Color>& p_colors);
    Vector<float> get_offsets() const;
    Vector<Color> get_colors() const;
    virtual Size2 get_minimum_size() const;
    GraphColorRampEdit();
};


class GraphCurveMapEdit : public Control {

    OBJ_TYPE(GraphCurveMapEdit,Control);


    struct Point {

        float offset;
        float height;
        bool operator<(const Point& p_ponit) const {
            return offset<p_ponit.offset;
        }
    };


    bool grabbing;
    int grabbed;
    Vector<Point> points;

    void _plot_curve(const Vector2& p_a,const Vector2& p_b,const Vector2& p_c,const Vector2& p_d);
protected:
    void _input_event(const InputEvent& p_event);
    void _notification(int p_what);
    static void _bind_methods();
public:

    void set_points(const Vector<Vector2>& p_points);
    Vector<Vector2> get_points() const;
    virtual Size2 get_minimum_size() const;
    GraphCurveMapEdit();
};

class ShaderGraphView : public Node {

    OBJ_TYPE(ShaderGraphView,Node);



    CustomPropertyEditor *ped_popup;
    bool block_update;

    Label *status;
    GraphEdit *graph_edit;
    Ref<ShaderGraph> graph;
    int edited_id;

    ShaderGraph::ShaderType type;

    void _update_graph();
    void _create_node(int p_id);



    void _connection_request(const String& p_from, int p_from_slot,const String& p_to,int p_to_slot);
    void _disconnection_request(const String& p_from, int p_from_slot,const String& p_to,int p_to_slot);

    void _node_removed(int p_id);
    void _begin_node_move();
    void _node_moved(const Vector2& p_from, const Vector2& p_to,int p_id);
    void _end_node_move();
    void _move_node(int p_id,const Vector2& p_to);

    void _scalar_const_changed(double p_value,int p_id);
    void _vec_const_changed(double p_value, int p_id, Array p_arr);
    void _rgb_const_changed(const Color& p_color, int p_id);
    void _xform_const_changed(int p_id,Node* p_button);
    void _scalar_op_changed(int p_op, int p_id);
    void _vec_op_changed(int p_op, int p_id);
    void _vec_scalar_op_changed(int p_op, int p_id);
    void _rgb_op_changed(int p_op, int p_id);
    void _xform_inv_rev_changed(bool p_enabled, int p_id);
    void _scalar_func_changed(int p_func, int p_id);
    void _vec_func_changed(int p_func, int p_id);
    void _scalar_input_changed(double p_value,int p_id);
    void _vec_input_changed(double p_value, int p_id, Array p_arr);
    void _xform_input_changed(int p_id,Node* p_button);
    void _rgb_input_changed(const Color& p_color, int p_id);
    void _tex_input_change(int p_id,Node* p_button);
    void _cube_input_change(int p_id);
    void _input_name_changed(const String& p_name,int p_id,Node* p_line_edit);
    void _tex_edited(int p_id,Node* p_button);
    void _cube_edited(int p_id,Node* p_button);
    void _variant_edited();
    void _comment_edited(int p_id,Node* p_button);
    void _color_ramp_changed(int p_id,Node* p_ramp);
    void _curve_changed(int p_id,Node* p_curve);
    void _sg_updated();
    Map<int,GraphNode*> node_map;
protected:
    void _notification(int p_what);
    static void _bind_methods();
public:

    void add_node(int p_type, const Vector2 &location);
    GraphEdit *get_graph_edit() { return graph_edit; }
    void set_graph(Ref<ShaderGraph> p_graph);

    ShaderGraphView(ShaderGraph::ShaderType p_type=ShaderGraph::SHADER_TYPE_FRAGMENT);
};

class ShaderGraphEditor : public VBoxContainer {

    OBJ_TYPE(ShaderGraphEditor,VBoxContainer);

    PopupMenu *popup;
    TabContainer *tabs;
    ShaderGraphView *graph_edits[ShaderGraph::SHADER_TYPE_MAX];
    static const char* node_names[ShaderGraph::NODE_TYPE_MAX];
    Vector2 next_location;

    bool _2d;
    void _add_node(int p_type);
    void _popup_requested(const Vector2 &p_position);
protected:
    void _notification(int p_what);
    static void _bind_methods();
public:

    void edit(Ref<ShaderGraph> p_shader);
    ShaderGraphEditor(bool p_2d);
};

class ShaderGraphEditorPlugin : public EditorPlugin {

    OBJ_TYPE( ShaderGraphEditorPlugin, EditorPlugin );

    bool _2d;
    ShaderGraphEditor *shader_editor;
    EditorNode *editor;

public:

    virtual String get_name() const { return "ShaderGraph"; }
    bool has_main_screen() const { return false; }
    virtual void edit(Object *p_node);
    virtual bool handles(Object *p_node) const;
    virtual void make_visible(bool p_visible);

    ShaderGraphEditorPlugin(EditorNode *p_node,bool p_2d);
    ~ShaderGraphEditorPlugin();

};
#endif