minetest/src/hud.h

/*
Minetest
Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>

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.
*/

#ifndef HUD_HEADER
#define HUD_HEADER

#include "irrlichttypes_extrabloated.h"
#include <string>

#define HUD_DIR_LEFT_RIGHT 0
#define HUD_DIR_RIGHT_LEFT 1
#define HUD_DIR_TOP_BOTTOM 2
#define HUD_DIR_BOTTOM_TOP 3

#define HUD_CORNER_UPPER  0
#define HUD_CORNER_LOWER  1
#define HUD_CORNER_CENTER 2

// Note that these visibility flags do not determine if the hud items are
// actually drawn, but rather, whether to draw the item should the rest
// of the game state permit it.
#define HUD_FLAG_HOTBAR_VISIBLE    (1 << 0)
#define HUD_FLAG_HEALTHBAR_VISIBLE (1 << 1)
#define HUD_FLAG_CROSSHAIR_VISIBLE (1 << 2)
#define HUD_FLAG_WIELDITEM_VISIBLE (1 << 3)
#define HUD_FLAG_BREATHBAR_VISIBLE (1 << 4)
#define HUD_FLAG_MINIMAP_VISIBLE   (1 << 5)

#define HUD_PARAM_HOTBAR_ITEMCOUNT 1
#define HUD_PARAM_HOTBAR_IMAGE 2
#define HUD_PARAM_HOTBAR_SELECTED_IMAGE 3

#define HUD_HOTBAR_ITEMCOUNT_DEFAULT 8
#define HUD_HOTBAR_ITEMCOUNT_MAX     23


#define HOTBAR_IMAGE_SIZE 48

enum HudElementType {
	HUD_ELEM_IMAGE     = 0,
	HUD_ELEM_TEXT      = 1,
	HUD_ELEM_STATBAR   = 2,
	HUD_ELEM_INVENTORY = 3,
	HUD_ELEM_WAYPOINT  = 4,
};

enum HudElementStat {
	HUD_STAT_POS = 0,
	HUD_STAT_NAME,
	HUD_STAT_SCALE,
	HUD_STAT_TEXT,
	HUD_STAT_NUMBER,
	HUD_STAT_ITEM,
	HUD_STAT_DIR,
	HUD_STAT_ALIGN,
	HUD_STAT_OFFSET,
	HUD_STAT_WORLD_POS,
	HUD_STAT_SIZE
};

struct HudElement {
	HudElementType type;
	v2f pos;
	std::string name;
	v2f scale;
	std::string text;
	u32 number;
	u32 item;
	u32 dir;
	v2f align;
	v2f offset;
	v3f world_pos;
	v2s32 size;
};

#ifndef SERVER

#include <vector>
#include <IGUIFont.h>
#include "irr_aabb3d.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;
	std::string hotbar_image = "";
	bool use_hotbar_image = false;
	std::string hotbar_selected_image = "";
	bool use_hotbar_selected_image = 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; }

	void drawLuaElements(const v3s16 &camera_offset);

private:
	void drawStatbar(v2s32 pos, u16 corner, u16 drawdir, std::string texture,
			s32 count, 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);

	float m_hud_scaling; // cached minetest setting
	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;

	enum {
		HIGHLIGHT_BOX,
		HIGHLIGHT_HALO,
		HIGHLIGHT_NONE } m_mode;
};

enum ItemRotationKind {
	IT_ROT_SELECTED,
	IT_ROT_HOVERED,
	IT_ROT_DRAGGED,
	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);

#endif

#endif