init

5 files changed, 349 insertions, 0 deletions

diff --git a/source/all.h b/source/all.h
new file mode 100644
index 0000000..babc53f
--- /dev/null
+++ b/source/all.h
@@ -0,0 +1,38 @@
+#ifndef EVERYTHING_ALWAYS_H_
+#define EVERYTHING_ALWAYS_H_
+
+#include <stdio.h>
+#include <stdint.h>
+#include <math.h>
+
+#include <raylib.h>
+#include <raygui.h>
+#include <rlgl.h>
+
+#include "chad.h"
+
+typedef struct {
+  Font font __attribute__((aligned));
+  i16 horizontal, vertical __attribute__((aligned));
+  f32 ups, fps __attribute__((aligned));
+} game_t;
+
+/* game.c */
+
+void GameInitialize(game_t * game, char * window_name);
+void GameDeinitialize(game_t * game);
+void GameFrame(game_t * game, size_t frame, f32 x, f32 y);
+Vector2 GameFrameVector(game_t * game, size_t frame);
+void GameLoop(game_t * game);
+i16 GameUpdate(game_t * game, timespec_t now);
+void GameRender(game_t * game, f64 interpolation);
+void GameReport(game_t * game, f32 fps, f32 ups, u32 total_fps, u32 total_ups) ;
+
+/* raylib.c */
+
+Font DefaultFont(char * choice);
+void GuiLoadStyleDarkSimple(void);
+
+/* ... */
+
+#endif /* EVERYTHING_ALWAYS_H_ */
diff --git a/source/chad.h b/source/chad.h
new file mode 100644
index 0000000..ceaec36
--- /dev/null
+++ b/source/chad.h
@@ -0,0 +1,119 @@
+/* util.h & time.h */
+
+#ifndef UTIL_H_
+#define UTIL_H_
+
+/* these things that are highly portable among programs and thus written in a modular style */
+
+#include <math.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <stdint.h>
+
+#define always_inline static inline __attribute__((always_inline))
+
+#define MIN(a,b) ((a)<(b)?(a):(b))
+#define MAX(a,b) ((a)>(b)?(a):(b))
+#define CLAMP(a,b,c) (a)<(b)?(b):(a)>(c)?(c):(a)
+
+always_inline void Root(char * filename) {
+  char path[PATH_MAX], * terminator;
+  if (!realpath(filename, path)) { return; }
+  if ((terminator = strrchr(path, '/'))) {
+    *terminator = '\0';
+    if(chdir(path)) { abort(); }
+  }
+}
+
+always_inline float Angle(float a_x, float a_y, float b_x, float b_y) {
+  return atan2f(b_y - a_y, b_x - a_x);
+}
+
+always_inline float Distance(float a_x, float a_y, float b_x, float b_y) {
+  return sqrtf(powf(b_x - a_x, 2) + powf(b_y - a_y, 2));
+}
+
+typedef int8_t i8;
+typedef int16_t i16;
+typedef int32_t i32;
+typedef int64_t i64;
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+typedef float f32;
+typedef double f64;
+
+#endif
+
+/* time.h */
+#ifndef TIME_H_
+#define TIME_H_
+#include <time.h>
+
+#define TIMESPEC_TO_F64(ts) ((double)(ts).tv_sec + ((double)(ts).tv_nsec / TIMESPEC_HZ))
+enum { TIMESPEC_HZ = 1000000000 };
+
+typedef struct timespec timespec_t;
+
+static const timespec_t one_second = {1, 0}, zero_seconds = {0, 0};
+
+always_inline timespec_t timespec_add(timespec_t a, timespec_t b) {
+    a.tv_sec += b.tv_sec;
+    a.tv_nsec += b.tv_nsec;
+    if (a.tv_nsec >= 1000000000) {
+        a.tv_sec++;
+        a.tv_nsec -= 1000000000;
+    }
+    return a;
+}
+
+always_inline timespec_t timespec_sub(timespec_t a, timespec_t b) {
+    a.tv_sec -= b.tv_sec;
+    a.tv_nsec -= b.tv_nsec;
+    if (a.tv_nsec < 0) {
+        a.tv_sec--;
+        a.tv_nsec += 1000000000;
+    }
+    return a;
+}
+
+always_inline int timespec_cmp(timespec_t a, timespec_t b) {
+  return a.tv_sec > b.tv_sec ?
+    (1) :
+    a.tv_sec < b.tv_sec ?
+    (-1) :
+    (
+      a.tv_nsec > b.tv_nsec ?
+      (1) :
+      a.tv_nsec < b.tv_nsec ?
+      (-1) : 0
+    );
+}
+
+always_inline timespec_t timespec_max(timespec_t a, timespec_t b) {
+  return a.tv_sec > b.tv_sec ?
+    a :
+    a.tv_sec < b.tv_sec ?
+    b :
+    (
+      a.tv_nsec > b.tv_nsec ?
+      a : b
+    );
+}
+
+always_inline timespec_t timespec_min(timespec_t a, timespec_t b) {
+  return a.tv_sec < b.tv_sec ?
+    a :
+    a.tv_sec > b.tv_sec ?
+    b :
+    (
+      a.tv_nsec < b.tv_nsec ?
+      a : b
+    );
+}
+#endif /* TIME_H_ */
diff --git a/source/game.c b/source/game.c
new file mode 100644
index 0000000..2ade12a
--- /dev/null
+++ b/source/game.c
@@ -0,0 +1,143 @@
+#include "all.h"
+
+void GameInitialize(game_t * game, char * window_name) {
+  SetConfigFlags(FLAG_WINDOW_RESIZABLE);
+  SetTraceLogLevel(LOG_NONE);
+  /* :config */
+  game->horizontal = 1920;
+  game->vertical = 1080;
+  InitWindow(game->horizontal, game->vertical, window_name);
+  game->ups = 60;
+  game->fps = 30;
+  game->font = DefaultFont("fonts/Atkinson/mono/AtkinsonHyperlegibleMono-Bold.otf");
+  /* :setup */
+  SetWindowState(FLAG_WINDOW_HIDDEN);
+  InitAudioDevice();
+  SetWindowPosition(0, 0);
+  GuiLoadStyleDarkSimple();
+  GuiSetFont(game->font);
+  /* --- */
+}
+
+void GameDeinitialize(game_t * game) {
+  SetWindowState(FLAG_WINDOW_HIDDEN);
+  UnloadFont(game->font);
+  CloseAudioDevice();
+  CloseWindow();
+}
+
+void GameLoop(game_t * game) {
+
+  #define StepStart(prefix)                                     \
+  prefix##_delta = timespec_sub(now, prefix##_last);            \
+  if (timespec_cmp(prefix##_delta, prefix##_interval) >= 0) { (void) 0
+
+  #define StepStop(prefix)                                              \
+    prefix##s_per_second++;                                             \
+    prefix##_total++;                                                   \
+    prefix##_last = timespec_add(prefix##_last, prefix##_interval);     \
+    if (timespec_cmp(prefix##_last, now) < 0) {                         \
+      prefix##_last = now;                                              \
+    }                                                                   \
+  }
+
+  #define StepSimpleStart(prefix,linear)                                \
+    prefix##_delta = timespec_sub(now, prefix##_last);                  \
+    if (timespec_cmp(prefix##_delta, (timespec_t){1.,0.}) >= 0) {  \
+      (void)0
+
+  #define StepSimpleStop(prefix)                        \
+    prefix##_last = now;                                \
+  }
+
+  timespec_t
+    now,
+    update_interval = {0, (f64) TIMESPEC_HZ / game->ups},
+    frame_interval = {0, (f64) TIMESPEC_HZ / game->fps},
+    update_last, frame_last, print_last,
+    update_delta, frame_delta, print_delta,
+    wait;
+
+  u16
+    updates_per_second = 0, frames_per_second = 0;
+
+  u32
+    frame_total = 0, update_total = 0;
+
+  f64 interpolation = 0.;
+
+  ClearWindowState(FLAG_WINDOW_HIDDEN);
+
+  clock_gettime(CLOCK_MONOTONIC, &now);
+  update_last = frame_last = print_last = now;
+
+  while (1) {
+    StepStart(update);
+    if (GameUpdate(game, now)) { return; }
+    StepStop(update);
+
+    StepStart(frame);
+    clock_gettime(CLOCK_MONOTONIC, &now);
+    interpolation =
+      CLAMP(
+	TIMESPEC_TO_F64(update_delta)
+	/ TIMESPEC_TO_F64(update_interval),
+	0.0, 1.0f);
+    GameRender(game, interpolation);
+    StepStop(frame);
+
+    clock_gettime(CLOCK_MONOTONIC, &now);
+
+    wait = timespec_sub(
+      timespec_min(
+	timespec_add(update_last, update_interval),
+	timespec_add(frame_last, frame_interval)),
+      now);
+
+    if (timespec_cmp(wait, zero_seconds) > 0) {
+      nanosleep(&wait, NULL);
+    }
+
+    StepSimpleStart(print, one_second);
+    GameReport(game,
+	       round(frames_per_second / TIMESPEC_TO_F64(print_delta)),
+	       round(updates_per_second / TIMESPEC_TO_F64(print_delta)),
+	       frame_total,
+	       update_total);
+    frames_per_second = updates_per_second = 0;
+    StepSimpleStop(print);
+
+    clock_gettime(CLOCK_MONOTONIC, &now);
+  }
+}
+
+i16 GameUpdate(game_t * game, timespec_t now) {
+  (void) now;
+
+  PollInputEvents();
+  if (IsWindowResized()) {
+    game->horizontal = GetScreenWidth();
+    game->vertical = GetScreenHeight();
+  }
+  switch (GetKeyPressed()) {
+  case KEY_ESCAPE: return 1;
+  }
+  return 0;
+}
+
+void GameRender(game_t * game, f64 interpolation) {
+  (void)interpolation;
+
+  BeginDrawing();
+  ClearBackground(BLACK);
+  /* >>> */
+  
+  /* --- */
+  rlDrawRenderBatchActive();
+  SwapScreenBuffer();
+}
+
+void GameReport(game_t * game, f32 fps, f32 ups, u32 total_fps, u32 total_ups) {
+  printf("[FPS|UPS|Total] (%3.0f : %3.0f) | [%7u/%7u]\n",
+	 fps, ups, total_fps, total_ups);
+}
diff --git a/source/main.c b/source/main.c
new file mode 100644
index 0000000..d00f7e7
--- /dev/null
+++ b/source/main.c
@@ -0,0 +1,16 @@
+#include "all.h"
+
+int Main(int count, char ** arguments)
+{
+  (void)count;
+  _Alignas(64) game_t game[1] = {0};
+  char * program_name = arguments[0];
+  srand(time(NULL));
+  Root(program_name);
+  GameInitialize(game, program_name);
+  GameLoop(game);
+  GameDeinitialize(game);
+  return 0;
+}
+
+int main (int count, char ** arguments) __attribute__((alias("Main")));
diff --git a/source/raylib.c b/source/raylib.c
new file mode 100644
index 0000000..935feee
--- /dev/null
+++ b/source/raylib.c
@@ -0,0 +1,33 @@
+/* raylib.c & raygui.c */
+
+#include <raylib.h>
+
+Font DefaultFont(char * choice) {
+  Font font = LoadFont(choice);
+  if (!IsFontValid(font)) { font = GetFontDefault(); }
+  return font;
+}
+
+/* raygui.c */
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#pragma GCC diagnostic ignored "-Wshadow"
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-result"
+#pragma GCC diagnostic ignored "-Wpragmas"
+#pragma GCC diagnostic ignored "-Wunknown-warning-option"
+#pragma GCC diagnostic ignored "-Walloc-size-larger-than="
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+
+#define RAYGUI_IMPLEMENTATION
+#include <raygui.h>
+#include <style_dark.h>
+#pragma GCC diagnostic pop
+
+/* removes the timewaster of decompressing and loading a font never used */
+void GuiLoadStyleDarkSimple(void) {
+  for (int i = 0; i < DARK_STYLE_PROPS_COUNT; i++) {
+    GuiSetStyle(darkStyleProps[i].controlId, darkStyleProps[i].propertyId, darkStyleProps[i].propertyValue);
+  }
+}