hud.h

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/*
Minetest
Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2017 red-001 <red-001@outlook.ie>
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.
 
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
 
#pragma once
 
#include <vector>
#include <IGUIFont.h>
#include "irr_aabb3d.h"
#include "../hud.h"
 
class Client;
class ITextureSource;
class Inventory;
class InventoryList;
class LocalPlayer;
struct ItemStack;
 
class Hud
{
public:
    video::IVideoDriver *driver;
    scene::ISceneManager *smgr;
    gui::IGUIEnvironment *guienv;
    Client *client;
    LocalPlayer *player;
    Inventory *inventory;
    ITextureSource *tsrc;
 
    video::SColor crosshair_argb;
    video::SColor selectionbox_argb;
 
    bool use_crosshair_image = false;
    bool use_object_crosshair_image = false;
    std::string hotbar_image = "";
    bool use_hotbar_image = false;
    std::string hotbar_selected_image = "";
    bool use_hotbar_selected_image = false;
 
    bool pointing_at_object = false;
 
    Hud(gui::IGUIEnvironment *guienv, Client *client, LocalPlayer *player,
            Inventory *inventory);
    ~Hud();
 
    void drawHotbar(u16 playeritem);
    void resizeHotbar();
    void drawCrosshair();
    void drawSelectionMesh();
    void updateSelectionMesh(const v3s16 &camera_offset);
 
    std::vector<aabb3f> *getSelectionBoxes() { return &m_selection_boxes; }
 
    void setSelectionPos(const v3f &pos, const v3s16 &camera_offset);
 
    v3f getSelectionPos() const { return m_selection_pos; }
 
    void setSelectionMeshColor(const video::SColor &color)
    {
        m_selection_mesh_color = color;
    }
 
    void setSelectedFaceNormal(const v3f &face_normal)
    {
        m_selected_face_normal = face_normal;
    }
 
    bool hasElementOfType(HudElementType type);
 
    void drawLuaElements(const v3s16 &camera_offset);
 
private:
    bool calculateScreenPos(const v3s16 &camera_offset, HudElement *e, v2s32 *pos);
    void drawStatbar(v2s32 pos, u16 corner, u16 drawdir,
            const std::string &texture, const std::string& bgtexture,
            s32 count, s32 maxcount, v2s32 offset, v2s32 size = v2s32());
 
    void drawItems(v2s32 upperleftpos, v2s32 screen_offset, s32 itemcount,
            s32 inv_offset, InventoryList *mainlist, u16 selectitem,
            u16 direction);
 
    void drawItem(const ItemStack &item, const core::rect<s32> &rect, bool selected);
 
    void drawCompassTranslate(HudElement *e, video::ITexture *texture,
            const core::rect<s32> &rect, int way);
 
    void drawCompassRotate(HudElement *e, video::ITexture *texture,
            const core::rect<s32> &rect, int way);
 
    float m_hud_scaling; // cached minetest setting
    float m_scale_factor;
    v3s16 m_camera_offset;
    v2u32 m_screensize;
    v2s32 m_displaycenter;
    s32 m_hotbar_imagesize; // Takes hud_scaling into account, updated by resizeHotbar()
    s32 m_padding; // Takes hud_scaling into account, updated by resizeHotbar()
    video::SColor hbar_colors[4];
 
    std::vector<aabb3f> m_selection_boxes;
    std::vector<aabb3f> m_halo_boxes;
    v3f m_selection_pos;
    v3f m_selection_pos_with_offset;
 
    scene::IMesh *m_selection_mesh = nullptr;
    video::SColor m_selection_mesh_color;
    v3f m_selected_face_normal;
 
    video::SMaterial m_selection_material;
 
    scene::SMeshBuffer m_rotation_mesh_buffer;
 
    enum
    {
        HIGHLIGHT_BOX,
        HIGHLIGHT_HALO,
        HIGHLIGHT_NONE
    } m_mode;
};
 
enum ItemRotationKind
{
    IT_ROT_SELECTED,
    IT_ROT_HOVERED,
    IT_ROT_DRAGGED,
    IT_ROT_OTHER,
    IT_ROT_NONE, // Must be last, also serves as number
};
 
void drawItemStack(video::IVideoDriver *driver,
        gui::IGUIFont *font,
        const ItemStack &item,
        const core::rect<s32> &rect,
        const core::rect<s32> *clip,
        Client *client,
        ItemRotationKind rotation_kind);
 
void drawItemStack(
        video::IVideoDriver *driver,
        gui::IGUIFont *font,
        const ItemStack &item,
        const core::rect<s32> &rect,
        const core::rect<s32> *clip,
        Client *client,
        ItemRotationKind rotation_kind,
        const v3s16 &angle,
        const v3s16 &rotation_speed);