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65 changes: 65 additions & 0 deletions examples/libc/exit.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,65 @@
#include <raylib.h>
#include <raymath.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

void raylib_js_set_entry(void (*entry)(void));

const double time_per_calc = 1; // in s
double time_since_last_calc = 0;
char buf[BUFSIZ];
int counter = 3;

void GameFrame()
{
BeginDrawing();

ClearBackground((Color){20, 20, 20, 255});

if (counter <= 0)
{
exit(0);
}

const size_t w = GetScreenWidth();
const size_t h = GetScreenHeight();
const size_t font_size = 72;

const int ch = h / 2 - (font_size / 2);

sprintf(buf, "%d%c", counter, '\0');
size_t text_size = MeasureText(buf, font_size);
int cw = w / 2 - (text_size / 2);
DrawText(buf, cw, ch, font_size, RED);

if (time_since_last_calc >= time_per_calc)
{
counter--;
time_since_last_calc = 0;
}
else
{
time_since_last_calc += GetFrameTime();
}

EndDrawing();
}

int main()
{
InitWindow(800, 600, "Hello, with math.h");
SetTargetFPS(60);

#ifdef PLATFORM_WEB
raylib_js_set_entry(GameFrame);
#else
while (!WindowShouldClose())
{
GameFrame();
}
CloseWindow();
#endif
return 0;
}
84 changes: 84 additions & 0 deletions examples/libc/file.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,84 @@
#include <raylib.h>
#include <raymath.h>
#include <stdio.h>
#include <stdbool.h>

void raylib_js_set_entry(void (*entry)(void));

bool once = true;
FILE *read_me = NULL;

char buf[BUFSIZ];
const double time_per_calc = 2; // in s
double time_since_last_calc = 0;

void GameFrame()
{
BeginDrawing();

ClearBackground((Color){20, 20, 20, 255});

const size_t w = GetScreenWidth();
const size_t h = GetScreenHeight();
const size_t font_size = 48;

if (time_since_last_calc >= time_per_calc)
{
// Get new line
if (is_file_ready(read_me))
{
if (feof(read_me))
{
rewind(read_me);
}

fgets(buf, BUFSIZ, read_me);
}

time_since_last_calc = 0;
}
else
{
time_since_last_calc += GetFrameTime();
}

// display text somewhat sensibly
size_t current_font_size = font_size;
size_t text_size = MeasureText(buf, font_size);
while (text_size > w && current_font_size > font_size / 2)
{
text_size = MeasureText(buf, --current_font_size);
}
if (text_size <= w)
{
DrawText(buf, w / 2 - (text_size / 2), h / 2 - (current_font_size / 2), current_font_size, RED);
}
else
{
DrawText(buf, 10, h / 2 - (current_font_size / 2), current_font_size, RED);
}

EndDrawing();
}

int main()
{
InitWindow(800, 600, "Hello, with loaded README.md");
SetTargetFPS(60);

read_me = fopen("README.md", "rb");

int w = GetScreenWidth();
int h = GetScreenHeight();

#ifdef PLATFORM_WEB
raylib_js_set_entry(GameFrame);
#else
while (!WindowShouldClose())
{
GameFrame();
}
CloseWindow();
#endif
return 0;
}
79 changes: 79 additions & 0 deletions examples/libc/malloc.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,79 @@
#include <raylib.h>
#include <raymath.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>

void raylib_js_set_entry(void (*entry)(void));

const double time_per_calc = 1; // in s
double time_since_last_calc = 0;

char buf[128];

char *buf_dym = NULL;
int counter = 1;

void GameFrame()
{
BeginDrawing();

ClearBackground((Color){20, 20, 20, 255});

const size_t w = GetScreenWidth();
const size_t h = GetScreenHeight();
const size_t font_size = 72;

const int ch = h / 2 - (font_size / 2);

buf_dym = realloc(buf_dym, counter + 1);

memset(buf_dym, 'a', counter);
buf_dym[counter] = '\0';
size_t text_size = MeasureText(buf_dym, font_size);
int cw = w / 2 - (text_size / 2);
DrawText(buf_dym, cw, ch - font_size, font_size, RED);

sprintf(buf, "malloc size: %d%c", counter + 1, '\0');
size_t m_text_size = MeasureText(buf, font_size);
cw = w / 2 - (m_text_size / 2);
DrawText(buf, cw, ch + font_size, font_size, RED);

if (text_size > w)
{
counter = 1;
free(buf_dym);
buf_dym = NULL;
}

if (time_since_last_calc >= time_per_calc)
{
counter++;
time_since_last_calc = 0;
}
else
{
time_since_last_calc += GetFrameTime();
}

EndDrawing();
}

int main()
{
InitWindow(800, 600, "Hello, with malloc");
SetTargetFPS(60);

#ifdef PLATFORM_WEB
raylib_js_set_entry(GameFrame);
#else
while (!WindowShouldClose())
{
GameFrame();
}
CloseWindow();
#endif
return 0;
}
69 changes: 69 additions & 0 deletions examples/libc/math.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,69 @@
#include <raylib.h>
#include <raymath.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

void raylib_js_set_entry(void (*entry)(void));

const double time_per_calc = 2; // in s
double time_since_last_calc = 0;
char buf[BUFSIZ];
double random = 0;
void GameFrame()
{
BeginDrawing();

ClearBackground((Color){20, 20, 20, 255});

const size_t w = GetScreenWidth();
const size_t h = GetScreenHeight();
const size_t font_size = 48;

const int ch = h / 2 - (font_size / 2);

sprintf(buf, "cos(%.2g) = %.2g%c", random, cos(random), '\0');
size_t text_size = MeasureText(buf, font_size);
int cw = w / 2 - (text_size / 2);
DrawText(buf, cw, ch - font_size, font_size, RED);

sprintf(buf, "sin(%.2g) = %.2g%c", random, sin(random), '\0');
text_size = MeasureText(buf, font_size);
cw = w / 2 - (text_size / 2);
DrawText(buf, cw, ch + font_size, font_size, RED);

if (time_since_last_calc >= time_per_calc)
{
const int random_int = rand();
random = ((random_int / (double)RAND_MAX) - 0.5) * 2 * 4;

time_since_last_calc = 0;
}
else
{
time_since_last_calc += GetFrameTime();
}

EndDrawing();
}

int main()
{
InitWindow(800, 600, "Hello, with math.h");
SetTargetFPS(60);

int w = GetScreenWidth();
int h = GetScreenHeight();

#ifdef PLATFORM_WEB
raylib_js_set_entry(GameFrame);
#else
while (!WindowShouldClose())
{
GameFrame();
}
CloseWindow();
#endif
return 0;
}
51 changes: 51 additions & 0 deletions examples/libc/time.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,51 @@
#include <raylib.h>
#include <raymath.h>
#include <stdio.h>
#include <stdbool.h>
#include <time.h>

void raylib_js_set_entry(void (*entry)(void));

char buf[BUFSIZ];

void GameFrame()
{
BeginDrawing();

ClearBackground((Color){20, 20, 20, 255});

const size_t w = GetScreenWidth();
const size_t h = GetScreenHeight();
const size_t font_size = 48;

const int ch = h / 2 - (font_size / 2);

time_t t = time(NULL);
struct tm *ts = localtime(&t);

char *time_text = asctime(ts);
sprintf(buf, "%s%c", time_text, '\0');

size_t text_size = MeasureText(buf, font_size);
int cw = w / 2 - (text_size / 2);
DrawText(buf, cw, ch, font_size, RED);

EndDrawing();
}

int main()
{
InitWindow(800, 600, "Hello, with math.h");
SetTargetFPS(60);

#ifdef PLATFORM_WEB
raylib_js_set_entry(GameFrame);
#else
while (!WindowShouldClose())
{
GameFrame();
}
CloseWindow();
#endif
return 0;
}
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