build: CMake and public headers

CMakeLists.txt

@@ -0,0 +1,34 @@
+cmake_minimum_required(VERSION 3.16)
+project(openkknd C)
+
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+set(CMAKE_C_EXTENSIONS OFF)
+
+file(READ "${CMAKE_SOURCE_DIR}/VERSION" OPENKKND_VERSION)
+string(STRIP "${OPENKKND_VERSION}" OPENKKND_VERSION)
+
+add_executable(openkknd
+  src/main.c
+  src/game.c
+  src/map.c
+  src/unit.c
+  src/render.c
+)
+
+target_include_directories(openkknd PRIVATE include)
+target_compile_definitions(openkknd PRIVATE
+  OPENKKND_VERSION="${OPENKKND_VERSION}"
+)
+
+find_package(SDL2 REQUIRED)
+if(TARGET SDL2::SDL2)
+  target_link_libraries(openkknd PRIVATE SDL2::SDL2)
+elseif(TARGET SDL2::SDL2-static)
+  target_link_libraries(openkknd PRIVATE SDL2::SDL2-static)
+else()
+  target_include_directories(openkknd PRIVATE ${SDL2_INCLUDE_DIRS})
+  target_link_libraries(openkknd PRIVATE ${SDL2_LIBRARIES})
+endif()
+
+install(TARGETS openkknd RUNTIME DESTINATION bin)

include/ok_game.h

@@ -0,0 +1,7 @@
+#ifndef OK_GAME_H
+#define OK_GAME_H
+#include "ok_types.h"
+void ok_game_init(OkGame *g);
+void ok_game_update(OkGame *g, float dt);
+void ok_game_spawn(OkGame *g, OkFaction f, OkUnitKind k, int x, int y);
+#endif

include/ok_map.h

@@ -0,0 +1,6 @@
+#ifndef OK_MAP_H
+#define OK_MAP_H
+#include "ok_types.h"
+void ok_map_generate(OkMap *m);
+bool ok_map_walkable(const OkMap *m, int x, int y);
+#endif

include/ok_render.h

@@ -0,0 +1,9 @@
+#ifndef OK_RENDER_H
+#define OK_RENDER_H
+#include "ok_types.h"
+#include <SDL.h>
+bool ok_render_init(int w, int h);
+void ok_render_draw(const OkGame *g);
+void ok_render_shutdown(void);
+SDL_Window *ok_render_window(void);
+#endif

include/ok_types.h

@@ -0,0 +1,46 @@
+#ifndef OK_TYPES_H
+#define OK_TYPES_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#define OK_MAP_W 64
+#define OK_MAP_H 48
+#define OK_MAX_UNITS 256
+
+typedef enum {
+  OK_FACTION_SURVIVORS = 0,
+  OK_FACTION_SCAVENGERS = 1
+} OkFaction;
+
+typedef enum {
+  OK_UNIT_INFANTRY = 0,
+  OK_UNIT_VEHICLE = 1
+} OkUnitKind;
+
+typedef struct {
+  int x, y;
+  OkFaction faction;
+  OkUnitKind kind;
+  int hp;
+  int hp_max;
+  int target; /* unit index or -1 */
+  bool alive;
+} OkUnit;
+
+typedef struct {
+  uint8_t tile[OK_MAP_H][OK_MAP_W]; /* 0 empty, 1 blocked, 2 resource */
+} OkMap;
+
+typedef struct {
+  OkMap map;
+  OkUnit units[OK_MAX_UNITS];
+  int unit_count;
+  int selected;
+  bool running;
+  bool survivors_win;
+  bool scavengers_win;
+  uint32_t tick;
+} OkGame;
+
+#endif

include/ok_unit.h

@@ -0,0 +1,5 @@
+#ifndef OK_UNIT_H
+#define OK_UNIT_H
+#include "ok_types.h"
+void ok_units_update(OkGame *g, float dt);
+#endif