initial commitHEAD master

author: Nikita Kostovsky <nikita@kostovsky.me> 2025-12-23 15:28:05 +0100
committer: Nikita Kostovsky <nikita@kostovsky.me> 2025-12-23 15:28:05 +0100
commit: c055eeef6d41269d11b2ddf7f9aba6f8867da65d (patch)
tree: dcd9baaec93c50a8ab49656be86ea248c17421fd
44 files changed, 1984 insertions, 0 deletions
diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..56838cf
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,15 @@
+AccessModifierOffset: -4
+AlignAfterOpenBracket: BlockIndent
+AllowAllArgumentsOnNextLine: false
+AllowAllParametersOfDeclarationOnNextLine: false
+BasedOnStyle: Microsoft
+BinPackParameters: false
+BinPackArguments: false
+BreakConstructorInitializers: BeforeComma
+ColumnLimit: 80
+InsertNewlineAtEOF: true
+IndentWidth: 4
+SpacesBeforeTrailingComments: 2
+UseTab: Never
+LineEnding: LF
+PointerAlignment: Left
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..3e68000
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.10.2)
+
+project(tiny-pixel-dungeon LANGUAGES CXX C)
+
+add_subdirectory(core)
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
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+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..36be4e6
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# Tiny Pixel Dungeon
+
+Attempt to port Shattered Pixel Dungeon to C++.
+
+Based on this project: https://github.com/ssloy/sdl2-demo
diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
new file mode 100644
index 0000000..6e9c657
--- /dev/null
+++ b/core/CMakeLists.txt
@@ -0,0 +1,37 @@
+cmake_minimum_required(VERSION 3.10.2)
+
+project(tpd-core LANGUAGES CXX C)
+
+set(CMAKE_CXX_STANDARD 23)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+set(SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/src")
+file(GLOB_RECURSE SOURCES
+    "${SRC_DIR}/*.h"
+    "${SRC_DIR}/*.cpp"
+)
+add_definitions(-DRESOURCES_DIR=\"${CMAKE_CURRENT_SOURCE_DIR}/resources/\")
+# TODO: remove later, after moving `main.cpp` out of this lix
+
+find_package(SDL2)
+if(${SDL2_FOUND})
+    message(STATUS "Found SDL2")
+
+    include_directories(${SDL2_INCLUDE_DIRS})
+    add_executable(${PROJECT_NAME} ${SOURCES})
+    target_link_libraries(${PROJECT_NAME} ${SDL2_LIBRARIES})
+else()
+    message(STATUS "Could not locate SDL2, using the submodule")
+    add_subdirectory(external)
+    add_executable(${PROJECT_NAME} ${SOURCES})
+    target_include_directories(${PROJECT_NAME} PRIVATE "external/SDL/include")
+    target_link_libraries(
+        ${PROJECT_NAME} PRIVATE
+        SDL2main
+        SDL2-static
+    )
+endif()
+
+message(NOTICE ${CMAKE_CURRENT_SOURCE_DIR}/src/cpp)
+#target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src/cpp)
+target_compile_definitions(${PROJECT_NAME} PUBLIC SDL_MAIN_HANDLED)
diff --git a/core/doc/1.png b/core/doc/1.png
new file mode 100644
index 0000000..a5b7862
--- /dev/null
+++ b/core/doc/1.png
diff --git a/core/doc/2.gif b/core/doc/2.gif
new file mode 100644
index 0000000..dcabdb0
--- /dev/null
+++ b/core/doc/2.gif
diff --git a/core/doc/3.gif b/core/doc/3.gif
new file mode 100644
index 0000000..583693f
--- /dev/null
+++ b/core/doc/3.gif
diff --git a/core/doc/4.png b/core/doc/4.png
new file mode 100644
index 0000000..1d949bd
--- /dev/null
+++ b/core/doc/4.png
diff --git a/core/doc/5.gif b/core/doc/5.gif
new file mode 100644
index 0000000..0a9577e
--- /dev/null
+++ b/core/doc/5.gif
diff --git a/core/doc/6.gif b/core/doc/6.gif
new file mode 100644
index 0000000..e6375c0
--- /dev/null
+++ b/core/doc/6.gif
diff --git a/core/doc/7.gif b/core/doc/7.gif
new file mode 100644
index 0000000..648bb01
--- /dev/null
+++ b/core/doc/7.gif
diff --git a/core/doc/capture.gif b/core/doc/capture.gif
new file mode 100644
index 0000000..975cd5d
--- /dev/null
+++ b/core/doc/capture.gif
diff --git a/core/external/CMakeLists.txt b/core/external/CMakeLists.txt
new file mode 100644
index 0000000..5ed06a3
--- /dev/null
+++ b/core/external/CMakeLists.txt
@@ -0,0 +1,3 @@
+set( SDL_STATIC ON CACHE BOOL "" FORCE )
+set( SDL_SHARED OFF CACHE BOOL "" FORCE )
+add_subdirectory( SDL )
diff --git a/core/resources/fall.bmp b/core/resources/fall.bmp
new file mode 100644
index 0000000..92db893
--- /dev/null
+++ b/core/resources/fall.bmp
diff --git a/core/resources/fall.png b/core/resources/fall.png
new file mode 100644
index 0000000..c9d1248
--- /dev/null
+++ b/core/resources/fall.png
diff --git a/core/resources/flight.bmp b/core/resources/flight.bmp
new file mode 100644
index 0000000..d08221a
--- /dev/null
+++ b/core/resources/flight.bmp
diff --git a/core/resources/flight.png b/core/resources/flight.png
new file mode 100644
index 0000000..a131ab4
--- /dev/null
+++ b/core/resources/flight.png
diff --git a/core/resources/ground.bmp b/core/resources/ground.bmp
new file mode 100644
index 0000000..bd4922a
--- /dev/null
+++ b/core/resources/ground.bmp
diff --git a/core/resources/ground.png b/core/resources/ground.png
new file mode 100644
index 0000000..c5f3a40
--- /dev/null
+++ b/core/resources/ground.png
diff --git a/core/resources/landing.bmp b/core/resources/landing.bmp
new file mode 100644
index 0000000..2a82992
--- /dev/null
+++ b/core/resources/landing.bmp
diff --git a/core/resources/landing.png b/core/resources/landing.png
new file mode 100644
index 0000000..aa715ef
--- /dev/null
+++ b/core/resources/landing.png
diff --git a/core/resources/numbers.bmp b/core/resources/numbers.bmp
new file mode 100644
index 0000000..51c4556
--- /dev/null
+++ b/core/resources/numbers.bmp
diff --git a/core/resources/numbers.png b/core/resources/numbers.png
new file mode 100644
index 0000000..9b4d20d
--- /dev/null
+++ b/core/resources/numbers.png
diff --git a/core/resources/rest.bmp b/core/resources/rest.bmp
new file mode 100644
index 0000000..3d6246a
--- /dev/null
+++ b/core/resources/rest.bmp
diff --git a/core/resources/rest.png b/core/resources/rest.png
new file mode 100644
index 0000000..8b6683c
--- /dev/null
+++ b/core/resources/rest.png
diff --git a/core/resources/takeoff.bmp b/core/resources/takeoff.bmp
new file mode 100644
index 0000000..0b468c6
--- /dev/null
+++ b/core/resources/takeoff.bmp
diff --git a/core/resources/takeoff.png b/core/resources/takeoff.png
new file mode 100644
index 0000000..43df0f9
--- /dev/null
+++ b/core/resources/takeoff.png
diff --git a/core/resources/walk.bmp b/core/resources/walk.bmp
new file mode 100644
index 0000000..50b9199
--- /dev/null
+++ b/core/resources/walk.bmp
diff --git a/core/resources/walk.png b/core/resources/walk.png
new file mode 100644
index 0000000..b590659
--- /dev/null
+++ b/core/resources/walk.png
diff --git a/core/src/cpp/animation.cpp b/core/src/cpp/animation.cpp
new file mode 100644
index 0000000..fbda115
--- /dev/null
+++ b/core/src/cpp/animation.cpp
@@ -0,0 +1,37 @@
+#include "animation.h"
+
+Animation::Animation(
+    SDL_Renderer* renderer,
+    const std::string& filename,
+    const int width,
+    const double durationS,
+    const bool repeat
+)
+    : Sprite{renderer, filename, width}
+    , durationS{durationS}
+    , repeat{repeat}
+{
+}
+
+bool Animation::animation_ended(const TimeStamp timestamp) const
+{
+    double elapsed = std::chrono::duration<double>(Clock::now() - timestamp)
+                         .count();  // seconds from timestamp to now
+    return !repeat && elapsed >= durationS;
+}
+
+int Animation::frame(const TimeStamp timestamp) const
+{
+    // seconds from timestamp to now
+    double elapsed =
+        std::chrono::duration<double>(Clock::now() - timestamp).count();
+    // FIXME: division by zero
+    int idx = static_cast<int>(nframes * elapsed / durationS);
+
+    return repeat ? idx % nframes : std::min(idx, nframes - 1);
+}
+
+SDL_Rect Animation::rect(const TimeStamp timestamp) const
+{
+    return {frame(timestamp) * width, 0, width, height};
+}
diff --git a/core/src/cpp/animation.h b/core/src/cpp/animation.h
new file mode 100644
index 0000000..d74ca75
--- /dev/null
+++ b/core/src/cpp/animation.h
@@ -0,0 +1,45 @@
+#pragma once
+
+#include "sprite.h"
+
+struct Animation : public Sprite
+{
+    explicit Animation(
+        SDL_Renderer* renderer,
+        const std::string& filename,
+        const int width,
+        const double durationS,
+        const bool repeat
+    );
+    ~Animation() override = default;
+
+public:
+    /*!
+     * \brief animation_ended - is the animation sequence ended as specified
+     * timestamp?
+     * \param timestamp
+     * \return true if ended, false otherwise
+     */
+    bool animation_ended(const TimeStamp timestamp) const;
+
+    /*!
+     * \brief frame - compute the frame number at current time for the the
+     * animation started at timestamp
+     * \param timestamp
+     * \return frame number
+     */
+    int frame(const TimeStamp timestamp) const;
+
+    /*!
+     * \brief rect - choose the right frame from the texture
+     * \param timestamp
+     * \return frame rect
+     */
+    SDL_Rect rect(const TimeStamp timestamp) const;
+
+    /*!
+     * \brief durationS - durationS of the animation sequence in seconds
+     */
+    const double durationS{1.};
+    const bool repeat{false};  // should we repeat the animation?
+};
diff --git a/core/src/cpp/assets.h b/core/src/cpp/assets.h
new file mode 100644
index 0000000..8c0790a
--- /dev/null
+++ b/core/src/cpp/assets.h
@@ -0,0 +1,585 @@
+#pragma once
+
+#include <array>
+#include <string>
+
+/*
+ * Pixel Dungeon
+ * Copyright (C) 2012-2015 Oleg Dolya
+ *
+ * Shattered Pixel Dungeon
+ * Copyright (C) 2014-2025 Evan Debenham
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General  License as published by
+ * the Free Software Foundation, either version 3 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 General  License for more details.
+ *
+ * You should have received a copy of the GNU General  License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+namespace Assets {
+namespace Effects {
+static inline std::string EFFECTS = "effects/effects.png";
+static inline std::string FIREBALL = "effects/fireball.png";
+static inline std::string SPECKS = "effects/specks.png";
+static inline std::string SPELL_ICONS = "effects/spell_icons.png";
+static inline std::string TEXT_ICONS = "effects/text_icons.png";
+} // namespace Effects
+
+namespace Environment {
+static inline std::string TERRAIN_FEATURES = "environment/terrain_features.png";
+static inline std::string VISUAL_GRID = "environment/visual_grid.png";
+static inline std::string WALL_BLOCKING = "environment/wall_blocking.png";
+static inline std::string TILES_SEWERS = "environment/tiles_sewers.png";
+static inline std::string TILES_PRISON = "environment/tiles_prison.png";
+static inline std::string TILES_CAVES = "environment/tiles_caves.png";
+static inline std::string TILES_CITY = "environment/tiles_city.png";
+static inline std::string TILES_HALLS = "environment/tiles_halls.png";
+static inline std::string TILES_CAVES_CRYSTAL = "environment/tiles_caves_crystal.png";
+static inline std::string TILES_CAVES_GNOLL = "environment/tiles_caves_gnoll.png";
+static inline std::string WATER_SEWERS = "environment/water0.png";
+static inline std::string WATER_PRISON = "environment/water1.png";
+static inline std::string WATER_CAVES = "environment/water2.png";
+static inline std::string WATER_CITY = "environment/water3.png";
+static inline std::string WATER_HALLS = "environment/water4.png";
+static inline std::string WEAK_FLOOR = "environment/custom_tiles/weak_floor.png";
+static inline std::string SEWER_BOSS = "environment/custom_tiles/sewer_boss.png";
+static inline std::string PRISON_QUEST = "environment/custom_tiles/prison_quest.png";
+static inline std::string PRISON_EXIT = "environment/custom_tiles/prison_exit.png";
+static inline std::string CAVES_QUEST = "environment/custom_tiles/caves_quest.png";
+static inline std::string CAVES_BOSS = "environment/custom_tiles/caves_boss.png";
+static inline std::string CITY_QUEST = "environment/custom_tiles/city_quest.png";
+static inline std::string CITY_BOSS = "environment/custom_tiles/city_boss.png";
+static inline std::string HALLS_SP = "environment/custom_tiles/halls_special.png";
+} // namespace Environment
+
+namespace Fonts {
+static inline std::string PIXELFONT = "fonts/pixel_font.png";
+}
+
+namespace Interfaces {
+static inline std::string ARCS_BG = "interfaces/arcs1.png";
+
+static inline std::string ARCS_FG = "interfaces/arcs2.png";
+
+static inline std::string BANNERS = "interfaces/banners.png";
+
+static inline std::string BADGES = "interfaces/badges.png";
+
+static inline std::string LOCKED = "interfaces/locked_badge.png";
+
+static inline std::string CHROME = "interfaces/chrome.png";
+
+static inline std::string ICONS = "interfaces/icons.png";
+
+static inline std::string STATUS = "interfaces/status_pane.png";
+
+static inline std::string MENU = "interfaces/menu_pane.png";
+
+static inline std::string MENU_BTN = "interfaces/menu_button.png";
+
+static inline std::string TOOLBAR = "interfaces/toolbar.png";
+
+static inline std::string SHADOW = "interfaces/shadow.png";
+
+static inline std::string BOSSHP = "interfaces/boss_hp.png";
+
+static inline std::string SURFACE = "interfaces/surface.png";
+
+static inline std::string BUFFS_SMALL = "interfaces/buffs.png";
+
+static inline std::string BUFFS_LARGE = "interfaces/large_buffs.png";
+
+static inline std::string TALENT_ICONS = "interfaces/talent_icons.png";
+
+static inline std::string TALENT_BUTTON = "interfaces/talent_button.png";
+
+static inline std::string HERO_ICONS = "interfaces/hero_icons.png";
+
+static inline std::string RADIAL_MENU = "interfaces/radial_menu.png";
+} // namespace Interfaces
+
+namespace Messages {
+static inline std::string ACTORS = "messages/actors/actors";
+
+static inline std::string ITEMS = "messages/items/items";
+
+static inline std::string JOURNAL = "messages/journal/journal";
+
+static inline std::string LEVELS = "messages/levels/levels";
+
+static inline std::string MISC = "messages/misc/misc";
+
+static inline std::string PLANTS = "messages/plants/plants";
+
+static inline std::string SCENES = "messages/scenes/scenes";
+
+static inline std::string UI = "messages/ui/ui";
+
+static inline std::string WINDOWS = "messages/windows/windows";
+} // namespace Messages
+
+namespace Music {
+static inline std::string THEME_1 = "music/theme_1.ogg";
+
+static inline std::string THEME_2 = "music/theme_2.ogg";
+
+static inline std::string THEME_FINALE = "music/theme_finale.ogg";
+
+static inline std::string SEWERS_1 = "music/sewers_1.ogg";
+
+static inline std::string SEWERS_2 = "music/sewers_2.ogg";
+
+static inline std::string SEWERS_3 = "music/sewers_3.ogg";
+
+static inline std::string SEWERS_TENSE = "music/sewers_tense.ogg";
+
+static inline std::string SEWERS_BOSS = "music/sewers_boss.ogg";
+
+static inline std::string PRISON_1 = "music/prison_1.ogg";
+
+static inline std::string PRISON_2 = "music/prison_2.ogg";
+
+static inline std::string PRISON_3 = "music/prison_3.ogg";
+
+static inline std::string PRISON_TENSE = "music/prison_tense.ogg";
+
+static inline std::string PRISON_BOSS = "music/prison_boss.ogg";
+
+static inline std::string CAVES_1 = "music/caves_1.ogg";
+
+static inline std::string CAVES_2 = "music/caves_2.ogg";
+
+static inline std::string CAVES_3 = "music/caves_3.ogg";
+
+static inline std::string CAVES_TENSE = "music/caves_tense.ogg";
+
+static inline std::string CAVES_BOSS = "music/caves_boss.ogg";
+
+static inline std::string CAVES_BOSS_FINALE = "music/caves_boss_finale.ogg";
+
+static inline std::string CITY_1 = "music/city_1.ogg";
+
+static inline std::string CITY_2 = "music/city_2.ogg";
+
+static inline std::string CITY_3 = "music/city_3.ogg";
+
+static inline std::string CITY_TENSE = "music/city_tense.ogg";
+
+static inline std::string CITY_BOSS = "music/city_boss.ogg";
+
+static inline std::string CITY_BOSS_FINALE = "music/city_boss_finale.ogg";
+
+static inline std::string HALLS_1 = "music/halls_1.ogg";
+
+static inline std::string HALLS_2 = "music/halls_2.ogg";
+
+static inline std::string HALLS_3 = "music/halls_3.ogg";
+
+static inline std::string HALLS_TENSE = "music/halls_tense.ogg";
+
+static inline std::string HALLS_BOSS = "music/halls_boss.ogg";
+
+static inline std::string HALLS_BOSS_FINALE = "music/halls_boss_finale.ogg";
+} // namespace Music
+
+namespace Sounds {
+static inline std::string CLICK = "sounds/click.mp3";
+
+static inline std::string BADGE = "sounds/badge.mp3";
+
+static inline std::string GOLD = "sounds/gold.mp3";
+
+static inline std::string OPEN = "sounds/door_open.mp3";
+
+static inline std::string UNLOCK = "sounds/unlock.mp3";
+
+static inline std::string ITEM = "sounds/item.mp3";
+
+static inline std::string DEWDROP = "sounds/dewdrop.mp3";
+
+static inline std::string STEP = "sounds/step.mp3";
+
+static inline std::string WATER = "sounds/water.mp3";
+
+static inline std::string GRASS = "sounds/grass.mp3";
+
+static inline std::string TRAMPLE = "sounds/trample.mp3";
+
+static inline std::string STURDY = "sounds/sturdy.mp3";
+
+static inline std::string HIT = "sounds/hit.mp3";
+
+static inline std::string MISS = "sounds/miss.mp3";
+
+static inline std::string HIT_SLASH = "sounds/hit_slash.mp3";
+
+static inline std::string HIT_STAB = "sounds/hit_stab.mp3";
+
+static inline std::string HIT_CRUSH = "sounds/hit_crush.mp3";
+
+static inline std::string HIT_MAGIC = "sounds/hit_magic.mp3";
+
+static inline std::string HIT_STRONG = "sounds/hit_strong.mp3";
+
+static inline std::string HIT_PARRY = "sounds/hit_parry.mp3";
+
+static inline std::string HIT_ARROW = "sounds/hit_arrow.mp3";
+
+static inline std::string ATK_SPIRITBOW = "sounds/atk_spiritbow.mp3";
+
+static inline std::string ATK_CROSSBOW = "sounds/atk_crossbow.mp3";
+
+static inline std::string HEALTH_WARN = "sounds/health_warn.mp3";
+
+static inline std::string HEALTH_CRITICAL = "sounds/health_critical.mp3";
+
+static inline std::string DESCEND = "sounds/descend.mp3";
+
+static inline std::string EAT = "sounds/eat.mp3";
+
+static inline std::string READ = "sounds/read.mp3";
+
+static inline std::string LULLABY = "sounds/lullaby.mp3";
+
+static inline std::string DRINK = "sounds/drink.mp3";
+
+static inline std::string SHATTER = "sounds/shatter.mp3";
+
+static inline std::string ZAP = "sounds/zap.mp3";
+
+static inline std::string LIGHTNING = "sounds/lightning.mp3";
+
+static inline std::string LEVELUP = "sounds/levelup.mp3";
+
+static inline std::string DEATH = "sounds/death.mp3";
+
+static inline std::string CHALLENGE = "sounds/challenge.mp3";
+
+static inline std::string CURSED = "sounds/cursed.mp3";
+
+static inline std::string TRAP = "sounds/trap.mp3";
+
+static inline std::string EVOKE = "sounds/evoke.mp3";
+
+static inline std::string TOMB = "sounds/tomb.mp3";
+
+static inline std::string ALERT = "sounds/alert.mp3";
+
+static inline std::string MELD = "sounds/meld.mp3";
+
+static inline std::string BOSS = "sounds/boss.mp3";
+
+static inline std::string BLAST = "sounds/blast.mp3";
+
+static inline std::string PLANT = "sounds/plant.mp3";
+
+static inline std::string RAY = "sounds/ray.mp3";
+
+static inline std::string BEACON = "sounds/beacon.mp3";
+
+static inline std::string TELEPORT = "sounds/teleport.mp3";
+
+static inline std::string CHARMS = "sounds/charms.mp3";
+
+static inline std::string MASTERY = "sounds/mastery.mp3";
+
+static inline std::string PUFF = "sounds/puff.mp3";
+
+static inline std::string ROCKS = "sounds/rocks.mp3";
+
+static inline std::string BURNING = "sounds/burning.mp3";
+
+static inline std::string FALLING = "sounds/falling.mp3";
+
+static inline std::string GHOST = "sounds/ghost.mp3";
+
+static inline std::string SECRET = "sounds/secret.mp3";
+
+static inline std::string BONES = "sounds/bones.mp3";
+
+static inline std::string BEE = "sounds/bee.mp3";
+
+static inline std::string DEGRADE = "sounds/degrade.mp3";
+
+static inline std::string MIMIC = "sounds/mimic.mp3";
+
+static inline std::string DEBUFF = "sounds/debuff.mp3";
+
+static inline std::string CHARGEUP = "sounds/chargeup.mp3";
+
+static inline std::string GAS = "sounds/gas.mp3";
+
+static inline std::string CHAINS = "sounds/chains.mp3";
+
+static inline std::string SCAN = "sounds/scan.mp3";
+
+static inline std::string SHEEP = "sounds/sheep.mp3";
+
+static inline std::string MINE = "sounds/mine.mp3";
+
+static inline std::array all{CLICK,
+                             BADGE,
+                             GOLD,
+
+                             OPEN,
+                             UNLOCK,
+                             ITEM,
+                             DEWDROP,
+                             STEP,
+                             WATER,
+                             GRASS,
+                             TRAMPLE,
+                             STURDY,
+
+                             HIT,
+                             MISS,
+                             HIT_SLASH,
+                             HIT_STAB,
+                             HIT_CRUSH,
+                             HIT_MAGIC,
+                             HIT_STRONG,
+                             HIT_PARRY,
+                             HIT_ARROW,
+                             ATK_SPIRITBOW,
+                             ATK_CROSSBOW,
+                             HEALTH_WARN,
+                             HEALTH_CRITICAL,
+
+                             DESCEND,
+                             EAT,
+                             READ,
+                             LULLABY,
+                             DRINK,
+                             SHATTER,
+                             ZAP,
+                             LIGHTNING,
+                             LEVELUP,
+                             DEATH,
+                             CHALLENGE,
+                             CURSED,
+                             TRAP,
+                             EVOKE,
+                             TOMB,
+                             ALERT,
+                             MELD,
+                             BOSS,
+                             BLAST,
+                             PLANT,
+                             RAY,
+                             BEACON,
+                             TELEPORT,
+                             CHARMS,
+                             MASTERY,
+                             PUFF,
+                             ROCKS,
+                             BURNING,
+                             FALLING,
+                             GHOST,
+                             SECRET,
+                             BONES,
+                             BEE,
+                             DEGRADE,
+                             MIMIC,
+                             DEBUFF,
+                             CHARGEUP,
+                             GAS,
+                             CHAINS,
+                             SCAN,
+                             SHEEP,
+                             MINE};
+} // namespace Sounds
+
+namespace Splashes {
+static inline std::string WARRIOR = "splashes/warrior.jpg";
+
+static inline std::string MAGE = "splashes/mage.jpg";
+
+static inline std::string ROGUE = "splashes/rogue.jpg";
+
+static inline std::string HUNTRESS = "splashes/huntress.jpg";
+
+static inline std::string DUELIST = "splashes/duelist.jpg";
+
+static inline std::string CLERIC = "splashes/cleric.jpg";
+
+static inline std::string SEWERS = "splashes/sewers.jpg";
+
+static inline std::string PRISON = "splashes/prison.jpg";
+
+static inline std::string CAVES = "splashes/caves.jpg";
+
+static inline std::string CITY = "splashes/city.jpg";
+
+static inline std::string HALLS = "splashes/halls.jpg";
+
+namespace Title {
+static inline std::string ARCHS = "splashes/title/archs.png";
+
+static inline std::string BACK_CLUSTERS = "splashes/title/back_clusters.png";
+
+static inline std::string MID_MIXED = "splashes/title/mid_mixed.png";
+
+static inline std::string FRONT_SMALL = "splashes/title/front_small.png";
+} // namespace Title
+} // namespace Splashes
+
+namespace Sprites {
+static inline std::string ITEMS = "sprites/items.png";
+
+static inline std::string ITEM_ICONS = "sprites/item_icons.png";
+
+static inline std::string WARRIOR = "sprites/warrior.png";
+
+static inline std::string MAGE = "sprites/mage.png";
+
+static inline std::string ROGUE = "sprites/rogue.png";
+
+static inline std::string HUNTRESS = "sprites/huntress.png";
+
+static inline std::string DUELIST = "sprites/duelist.png";
+
+static inline std::string CLERIC = "sprites/cleric.png";
+
+static inline std::string AVATARS = "sprites/avatars.png";
+
+static inline std::string PET = "sprites/pet.png";
+
+static inline std::string AMULET = "sprites/amulet.png";
+
+static inline std::string RAT = "sprites/rat.png";
+
+static inline std::string BRUTE = "sprites/brute.png";
+
+static inline std::string SPINNER = "sprites/spinner.png";
+
+static inline std::string DM300 = "sprites/dm300.png";
+
+static inline std::string WRAITH = "sprites/wraith.png";
+
+static inline std::string UNDEAD = "sprites/undead.png";
+
+static inline std::string KING = "sprites/king.png";
+
+static inline std::string PIRANHA = "sprites/piranha.png";
+
+static inline std::string EYE = "sprites/eye.png";
+
+static inline std::string GNOLL = "sprites/gnoll.png";
+
+static inline std::string CRAB = "sprites/crab.png";
+
+static inline std::string GOO = "sprites/goo.png";
+
+static inline std::string SWARM = "sprites/swarm.png";
+
+static inline std::string SKELETON = "sprites/skeleton.png";
+
+static inline std::string SHAMAN = "sprites/shaman.png";
+
+static inline std::string THIEF = "sprites/thief.png";
+
+static inline std::string TENGU = "sprites/tengu.png";
+
+static inline std::string SHEEP = "sprites/sheep.png";
+
+static inline std::string KEEPER = "sprites/shopkeeper.png";
+
+static inline std::string BAT = "sprites/bat.png";
+
+static inline std::string ELEMENTAL = "sprites/elemental.png";
+
+static inline std::string MONK = "sprites/monk.png";
+
+static inline std::string WARLOCK = "sprites/warlock.png";
+
+static inline std::string GOLEM = "sprites/golem.png";
+
+static inline std::string STATUE = "sprites/statue.png";
+
+static inline std::string SUCCUBUS = "sprites/succubus.png";
+
+static inline std::string SCORPIO = "sprites/scorpio.png";
+
+static inline std::string FISTS = "sprites/yog_fists.png";
+
+static inline std::string YOG = "sprites/yog.png";
+
+static inline std::string LARVA = "sprites/larva.png";
+
+static inline std::string GHOST = "sprites/ghost.png";
+
+static inline std::string MAKER = "sprites/wandmaker.png";
+
+static inline std::string TROLL = "sprites/blacksmith.png";
+
+static inline std::string IMP = "sprites/demon.png";
+
+static inline std::string RATKING = "sprites/ratking.png";
+
+static inline std::string BEE = "sprites/bee.png";
+
+static inline std::string MIMIC = "sprites/mimic.png";
+
+static inline std::string ROT_LASH = "sprites/rot_lasher.png";
+
+static inline std::string ROT_HEART = "sprites/rot_heart.png";
+
+static inline std::string GUARD = "sprites/guard.png";
+
+static inline std::string WARDS = "sprites/wards.png";
+
+static inline std::string GUARDIAN = "sprites/guardian.png";
+
+static inline std::string SLIME = "sprites/slime.png";
+
+static inline std::string SNAKE = "sprites/snake.png";
+
+static inline std::string NECRO = "sprites/necromancer.png";
+
+static inline std::string GHOUL = "sprites/ghoul.png";
+
+static inline std::string RIPPER = "sprites/ripper.png";
+
+static inline std::string SPAWNER = "sprites/spawner.png";
+
+static inline std::string DM100 = "sprites/dm100.png";
+
+static inline std::string PYLON = "sprites/pylon.png";
+
+static inline std::string DM200 = "sprites/dm200.png";
+
+static inline std::string LOTUS = "sprites/lotus.png";
+
+static inline std::string NINJA_LOG = "sprites/ninja_log.png";
+
+static inline std::string SPIRIT_HAWK = "sprites/spirit_hawk.png";
+
+static inline std::string RED_SENTRY = "sprites/red_sentry.png";
+
+static inline std::string CRYSTAL_WISP = "sprites/crystal_wisp.png";
+
+static inline std::string CRYSTAL_GUARDIAN = "sprites/crystal_guardian.png";
+
+static inline std::string CRYSTAL_SPIRE = "sprites/crystal_spire.png";
+
+static inline std::string GNOLL_GUARD = "sprites/gnoll_guard.png";
+
+static inline std::string GNOLL_SAPPER = "sprites/gnoll_sapper.png";
+
+static inline std::string GNOLL_GEOMANCER = "sprites/gnoll_geomancer.png";
+
+static inline std::string FUNGAL_SPINNER = "sprites/fungal_spinner.png";
+
+static inline std::string FUNGAL_SENTRY = "sprites/fungal_sentry.png";
+
+static inline std::string FUNGAL_CORE = "sprites/fungal_core.png";
+} // namespace Sprites
+} // namespace Assets
diff --git a/core/src/cpp/fps_counter.cpp b/core/src/cpp/fps_counter.cpp
new file mode 100644
index 0000000..fe4233d
--- /dev/null
+++ b/core/src/cpp/fps_counter.cpp
@@ -0,0 +1,41 @@
+#include "fps_counter.h"
+
+#include <SDL_render.h>
+
+FPS_Counter::FPS_Counter(SDL_Renderer* renderer)
+    // TODO: cleanup fucking hardcode everywhere
+    : renderer{renderer}
+    , numbers{renderer, "numbers.bmp", 24}
+{
+}
+
+void FPS_Counter::draw()
+{
+    fps_cur++;
+
+    double dt = std::chrono::duration<double>(Clock::now() - timestamp).count();
+
+    // update current FPS reading every 300 ms
+    // TODO: rewrite with type safety
+    if (dt >= .3)
+    {
+        fps_prev = fps_cur / dt;
+        fps_cur = 0;
+        timestamp = Clock::now();
+    }
+
+    // first character will be drawn here
+    SDL_Rect dst = {4, 16, numbers.width, numbers.height};
+
+    // extract individual digits of fps_prev
+    for (const char c : std::to_string(fps_prev))
+    {
+        // crude conversion of numeric characters to int: '7'-'0'=7
+        SDL_Rect src = numbers.rect(c - '0');
+        // draw current digit
+        SDL_RenderCopy(renderer, numbers.texture, &src, &dst);
+        // draw characters left-to-right, +4 for letter spacing
+        // TODO: add padding directly to the .bmp file
+        dst.x += numbers.width + 4;
+    }
+}
diff --git a/core/src/cpp/fps_counter.h b/core/src/cpp/fps_counter.h
new file mode 100644
index 0000000..6ac289e
--- /dev/null
+++ b/core/src/cpp/fps_counter.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include "sprite.h"
+
+struct FPS_Counter {
+    explicit FPS_Counter(SDL_Renderer* renderer);
+
+    void draw();
+
+    /*!
+     * \brief fps_cur - the FPS readings are updated once in a while; fps_cur is
+     * the number of draw() calls since the last reading
+     */
+    int fps_cur{0};
+    /*!
+     * \brief fps_prev - and here is the last fps reading
+     */
+    int fps_prev{0};
+    /*!
+     * \brief timestamp - last time fps_prev was updated
+     */
+    TimeStamp timestamp{Clock::now()};
+    /*!
+     * \brief renderer - draw here
+     */
+    SDL_Renderer* renderer{nullptr};
+    /*!
+     * \brief numbers - "font" file
+     */
+    const Sprite numbers;
+};
diff --git a/core/src/cpp/main.cpp b/core/src/cpp/main.cpp
new file mode 100644
index 0000000..915e0ce
--- /dev/null
+++ b/core/src/cpp/main.cpp
@@ -0,0 +1,64 @@
+#include <iostream>
+#include <chrono>
+#include <thread>
+
+#include <SDL.h>
+
+#include "assets.h"
+#include "fps_counter.h"
+#include "map.h"
+#include "player.h"
+
+void main_loop(SDL_Renderer *renderer) {
+    FPS_Counter fps_counter(renderer);
+    Map map(renderer);
+    Player player(renderer);
+    TimeStamp timestamp = Clock::now();
+
+    while (true) {       // main game loop
+        SDL_Event event; // handle window closing
+        if (SDL_PollEvent(&event) && (SDL_QUIT==event.type || (SDL_KEYDOWN==event.type && SDLK_ESCAPE==event.key.keysym.sym)))
+            break; // quit
+        player.handle_keyboard(); // no need for the event variable, direct keyboard state polling
+
+        const auto dt = Clock::now() - timestamp;
+        if (dt<std::chrono::milliseconds(20)) { // 50 FPS regulation
+            std::this_thread::sleep_for(std::chrono::milliseconds(1));
+            continue;
+        }
+        timestamp = Clock::now();
+
+        player.update_state(std::chrono::duration<double>(dt).count(), map); // gravity, movements, collision detection etc
+
+        SDL_RenderClear(renderer); // re-draw the window
+        fps_counter.draw();
+        player.draw();
+        map.draw();
+        SDL_RenderPresent(renderer);
+    }
+} // N.B. fps_counter, map and player objects call their destructors here, thus destroying allocated textures, it must be done prior to destroying the renderer
+
+int main() {
+    SDL_SetMainReady(); // tell SDL that we handle main() function ourselves, comes with the SDL_MAIN_HANDLED macro
+    if (SDL_Init(SDL_INIT_VIDEO)) {
+        std::cerr << "Failed to initialize SDL: " << SDL_GetError() << std::endl;
+        return -1;
+    }
+
+    SDL_Window   *window   = nullptr;
+    SDL_Renderer *renderer = nullptr;
+    if (SDL_CreateWindowAndRenderer(1024, 768, SDL_WINDOW_SHOWN | SDL_WINDOW_INPUT_FOCUS, &window, &renderer)) {
+        std::cerr << "Failed to create window and renderer: " << SDL_GetError() << std::endl;
+        return -1;
+    }
+    SDL_SetWindowTitle(window, "SDL2 game blank");
+    SDL_SetRenderDrawColor(renderer, 210, 255, 179, 255);
+
+    main_loop(renderer); // all interesting things happen here
+
+    SDL_DestroyRenderer(renderer);
+    SDL_DestroyWindow(window);
+    SDL_Quit();
+    return 0;
+}
+
diff --git a/core/src/cpp/map.cpp b/core/src/cpp/map.cpp
new file mode 100644
index 0000000..06548e3
--- /dev/null
+++ b/core/src/cpp/map.cpp
@@ -0,0 +1,43 @@
+#include "map.h"
+
+#include <iostream>
+
+Map::Map(SDL_Renderer* renderer)
+    : renderer{renderer}
+    , textures{renderer, "ground.bmp", 128}
+{
+    // +1 for the null terminated string
+    assert(sizeof(level) == size.w * size.h + 1);
+
+    size2d<int> window_size{0, 0};
+
+    if (!SDL_GetRendererOutputSize(renderer, &window_size.w, &window_size.h))
+    {
+        tile_size = window_size / size;
+    }
+    else
+    {
+        std::cerr << "Failed to get renderer size: " << SDL_GetError()
+                  << std::endl;
+    }
+}
+
+void Map::draw()
+{
+    for (int j = 0; j < size.h; j++)
+    {
+        for (int i = 0; i < size.w; i++)
+        {
+            if (is_empty(i, j))
+            {
+                continue;
+            }
+
+            SDL_Rect dst =
+                {tile_size.w * i, tile_size.h * j, tile_size.w, tile_size.h};
+            SDL_Rect src = textures.rect(get(i, j));
+
+            SDL_RenderCopy(renderer, textures.texture, &src, &dst);
+        }
+    }
+}
diff --git a/core/src/cpp/map.h b/core/src/cpp/map.h
new file mode 100644
index 0000000..668305b
--- /dev/null
+++ b/core/src/cpp/map.h
@@ -0,0 +1,63 @@
+#pragma once
+
+#include <cassert>
+
+#include <SDL.h>
+
+#include "size2d.h"
+#include "sprite.h"
+
+struct Map {
+    explicit Map(SDL_Renderer* renderer);
+
+    // draw the level in the renderer window
+    void draw();
+
+    int get(const int i, const int j) const { // retreive the cell, transform character to texture index
+        assert(i >= 0 && j >= 0 && i < size.w && j < size.h);
+        return level[i + j * size.w] - '0';
+    }
+
+    bool is_empty(const int i, const int j) const {
+        assert(i >= 0 && j >= 0 && i < size.w && j < size.h);
+        return level[i + j * size.w] == ' ';
+    }
+
+    /*!
+     * \brief renderer - draw here
+     */
+    SDL_Renderer* renderer{nullptr};
+    /*!
+     * \brief tile_size - tile size in the renderer window
+     */
+    size2d<int> tile_size{0, 0};
+
+    /*!
+     * \brief textures - textures to be drawn
+     */
+    const Sprite textures;
+
+    /*!
+     * \brief size - overall map dimensions
+     */
+    static constexpr size2d<int> size{16, 12};
+
+    /*!
+     * \brief level - the array level[] has the length
+     * w*h+1 (+1 for the null character), space character for empty tiles,
+     * digits indicate the texture index to be used per tile
+     */
+    static constexpr char level[size.w * size.h + 1] = " 123451234012340"
+                                                       "5              5"
+                                                       "0              0"
+                                                       "5          5   5"
+                                                       "0          0   0"
+                                                       "512340   12345 5"
+                                                       "0              0"
+                                                       "5             51"
+                                                       "0     50      12"
+                                                       "5          51234"
+                                                       "0          12345"
+                                                       "1234012345052500";
+};
+
diff --git a/core/src/cpp/player.cpp b/core/src/cpp/player.cpp
new file mode 100644
index 0000000..ce2b421
--- /dev/null
+++ b/core/src/cpp/player.cpp
@@ -0,0 +1,154 @@
+#include "player.h"
+
+Player::Player(SDL_Renderer* renderer)
+    : renderer{renderer}
+    , sprites{
+          Animation{renderer, "rest.bmp", 256, 1.0, true},
+          Animation{renderer, "takeoff.bmp", 256, 0.3, false},
+          Animation{renderer, "flight.bmp", 256, 1.3, false},
+          Animation{renderer, "landing.bmp", 256, 0.3, false},
+          Animation{renderer, "walk.bmp", 256, 1.0, true},
+          Animation{renderer, "fall.bmp", 256, 1.0, true}
+      }
+{
+}
+
+void Player::set_state(const States& s)
+{
+    timestamp = Clock::now();
+    state = s;
+
+    if (state != States::FLIGHT && state != States::WALK)
+    {
+        speed.x = 0;
+    }
+    else if (state == States::WALK)
+    {
+        speed.x = backwards ? -150 : 150;
+    }
+    else if (state == States::FLIGHT)
+    {
+        speed.y = jump.y;
+        speed.x = backwards ? -jump.x : jump.x;
+    }
+}
+
+void Player::handle_keyboard()
+{
+    const Uint8* kbstate{SDL_GetKeyboardState(nullptr)};
+
+    if (state == States::WALK && !kbstate[SDL_SCANCODE_RIGHT] &&
+        !kbstate[SDL_SCANCODE_LEFT])
+    {
+        set_state(States::REST);
+    }
+
+    if ((state == States::REST || state == States::WALK) &&
+        kbstate[SDL_SCANCODE_UP])
+    {
+        if (kbstate[SDL_SCANCODE_LEFT] || kbstate[SDL_SCANCODE_RIGHT])
+        {
+            jump.x = 200;  // long jump
+            jump.y = -200;
+        }
+        else
+        {
+            jump.x = 50;  // high jump
+            jump.y = -300;
+        }
+
+        set_state(States::TAKEOFF);
+    }
+
+    if (state == States::REST &&
+        (kbstate[SDL_SCANCODE_LEFT] || kbstate[SDL_SCANCODE_RIGHT]))
+    {
+        backwards = kbstate[SDL_SCANCODE_LEFT];
+        set_state(States::WALK);
+    }
+}
+
+const Animation& Player::sprite(const States& state)
+{
+    return sprites.at(static_cast<int>(state));
+}
+
+void Player::update_state(const double dt, const Map& map)
+{
+    // takeoff -> flight
+    if (state == States::TAKEOFF && sprite(state).animation_ended(timestamp))
+    {
+        set_state(States::FLIGHT);
+    }
+
+    // landing -> rest
+    if (state == States::LANDING && sprite(state).animation_ended(timestamp))
+    {
+        set_state(States::REST);
+    }
+
+    // put free falling sprite if no ground under the feet
+    if (state != States::FLIGHT &&
+        map.is_empty(pos.x / map.tile_size.w, pos.y / map.tile_size.h + 1))
+    {
+        set_state(States::FALL);
+    }
+
+    // prior to collision detection
+    pos.x += dt * speed.x;
+
+    // horizontal collision detection
+    if (!map.is_empty(pos.x / map.tile_size.w, pos.y / map.tile_size.h))
+    {
+        // snap the coorinate to the boundary of last free tile
+        int snap = std::round(pos.x / map.tile_size.w) * map.tile_size.w;
+
+        // be careful to snap to the left or to the right side of the free tile
+        pos.x = snap + (snap > pos.x ? 1 : -1);
+        // stop
+        speed.x = 0;
+    }
+
+    // prior to collision detection
+    pos.y += dt * speed.y;
+    // gravity
+    speed.y += dt * 300;
+
+    // vertical collision detection
+    if (!map.is_empty(pos.x / map.tile_size.w, pos.y / map.tile_size.h))
+    {
+        // snap the coorinate to the boundary of last free tile
+        int snap = std::round(pos.y / map.tile_size.h) * map.tile_size.h;
+
+        // be careful to snap to the top or the bottom side of the free tile
+        pos.y = snap + (snap > pos.y ? 1 : -1);
+        // stop
+        speed.y = 0;
+
+        if (state == States::FLIGHT || state == States::FALL)
+        {
+            set_state(States::LANDING);
+        }
+    }
+}
+
+void Player::draw()
+{
+    const SDL_Rect src{sprite(state).rect(timestamp)};
+    const SDL_Rect dest{
+        static_cast<int>(pos.x) - sprite_size.w / 2,
+        static_cast<int>(pos.y) - sprite_size.h,
+        sprite_size.w,
+        sprite_size.h
+    };
+
+    SDL_RenderCopyEx(
+        renderer,
+        sprite(state).texture,
+        &src,
+        &dest,
+        0,
+        nullptr,
+        backwards ? SDL_FLIP_HORIZONTAL : SDL_FLIP_NONE
+    );
+}
diff --git a/core/src/cpp/player.h b/core/src/cpp/player.h
new file mode 100644
index 0000000..f6837bb
--- /dev/null
+++ b/core/src/cpp/player.h
@@ -0,0 +1,63 @@
+#pragma once
+
+#include "animation.h"
+#include "map.h"
+#include "size2d.h"
+#include "vec2d.h"
+
+struct SDL_Renderer;
+
+struct Player
+{
+    enum class States
+    {
+        REST = 0,
+        TAKEOFF = 1,
+        FLIGHT = 2,
+        LANDING = 3,
+        WALK = 4,
+        FALL = 5
+    };
+
+    explicit Player(SDL_Renderer* renderer);
+
+    void set_state(const States& s);
+
+    void handle_keyboard();
+
+    const Animation& sprite(const States& state);
+
+    void update_state(const double dt, const Map& map);
+
+    void draw();
+
+    // coordinates of the character
+    vec2d<double> pos{150., 200.};
+    // speed of the character
+    vec2d<double> speed{0., 0.};
+
+    /*!
+     * \brief backwards - facing left or right
+     */
+    bool backwards{false};
+    // will be used to differentiate high jump from a long jump
+    vec2d<double> jump{0., 0.};
+
+    /*!
+     * \brief state - current sprite
+     */
+    States state{States::REST};
+    TimeStamp timestamp{Clock::now()};
+    /*!
+     * \brief renderer - draw here
+     */
+    SDL_Renderer* renderer{nullptr};
+
+    // size of the sprite on the screen
+    size2d<int> sprite_size{256, 128};
+
+    /*!
+     * \brief sprites - sprite sequences to be drawn
+     */
+    const std::array<Animation, 6> sprites;
+};
diff --git a/core/src/cpp/size2d.h b/core/src/cpp/size2d.h
new file mode 100644
index 0000000..1d12307
--- /dev/null
+++ b/core/src/cpp/size2d.h
@@ -0,0 +1,15 @@
+#pragma once
+
+template <typename T = int> struct size2d
+{
+    T w{0};
+    T h{0};
+
+    inline size2d<T> operator/(const size2d<T>& other);
+};
+
+template <typename T>
+inline size2d<T> size2d<T>::operator/(const size2d<T>& other)
+{
+    return {w / other.w, h / other.h};
+}
diff --git a/core/src/cpp/sprite.cpp b/core/src/cpp/sprite.cpp
new file mode 100644
index 0000000..afd633d
--- /dev/null
+++ b/core/src/cpp/sprite.cpp
@@ -0,0 +1,49 @@
+#include "sprite.h"
+
+#include <iostream>
+
+#include <SDL_render.h>
+#include <SDL_surface.h>
+
+Sprite::Sprite(
+    SDL_Renderer* renderer,
+    const std::string& filename,
+    const int width
+)
+    : width{width}
+{
+    SDL_Surface* surface =
+        SDL_LoadBMP((std::string(RESOURCES_DIR) + filename).c_str());
+
+    if (!surface)
+    {
+        std::cerr << "Error in SDL_LoadBMP: " << SDL_GetError() << std::endl;
+        return;
+    }
+
+    if (!(surface->w % width) && surface->w / width)
+    {  // image width must be a multiple of sprite width
+        height = surface->h;
+        nframes = surface->w / width;
+        texture = SDL_CreateTextureFromSurface(renderer, surface);
+    }
+    else
+    {
+        std::cerr << "Incorrect sprite size" << std::endl;
+    }
+
+    SDL_FreeSurface(surface);
+}
+
+Sprite::~Sprite()
+{
+    if (texture)
+    {
+        SDL_DestroyTexture(texture);
+    }
+}
+
+SDL_Rect Sprite::rect(const int idx) const
+{
+    return {idx * width, 0, width, height};
+}
diff --git a/core/src/cpp/sprite.h b/core/src/cpp/sprite.h
new file mode 100644
index 0000000..8c60060
--- /dev/null
+++ b/core/src/cpp/sprite.h
@@ -0,0 +1,48 @@
+#pragma once
+
+#include <chrono>
+#include <string>
+
+#include <SDL_rect.h>
+
+using Clock = std::chrono::high_resolution_clock;
+using TimeStamp = std::chrono::time_point<Clock>;
+
+struct SDL_Texture;
+struct SDL_Renderer;
+
+struct Sprite {
+    explicit Sprite(
+        SDL_Renderer* renderer,
+        const std::string& filename,
+        const int width
+    );
+
+    virtual ~Sprite();
+
+public:
+    /*!
+     * \brief rect - choose the sprite rect from the texture by index
+     * \param idx - index of sprite
+     * \return
+     */
+    SDL_Rect rect(const int idx) const;
+
+public:
+    /*!
+     * \brief texture - the image is to be stored here
+     */
+    SDL_Texture* texture{nullptr};
+    /*!
+     * \brief width - single sprite width (texture width = width * nframes)
+     */
+    int width{0};
+    /*!
+     * \brief height - sprite height
+     */
+    int height{0};
+    /*!
+     * \brief nframes - number of frames in the animation sequence
+     */
+    int nframes{0};
+};
diff --git a/core/src/cpp/vec2d.h b/core/src/cpp/vec2d.h
new file mode 100644
index 0000000..9dc1e39
--- /dev/null
+++ b/core/src/cpp/vec2d.h
@@ -0,0 +1,7 @@
+#pragma once
+
+template <typename T = double> struct vec2d
+{
+    T x{0};
+    T y{0};
+};
author	Nikita Kostovsky <nikita@kostovsky.me>	2025-12-23 15:28:05 +0100
committer	Nikita Kostovsky <nikita@kostovsky.me>	2025-12-23 15:28:05 +0100
commit	c055eeef6d41269d11b2ddf7f9aba6f8867da65d (patch)
tree	dcd9baaec93c50a8ab49656be86ea248c17421fd