mirror of https://github.com/kiedtl/fire.git
110 lines
2.1 KiB
C
110 lines
2.1 KiB
C
#include <math.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#define BOOL unsigned char
|
|
#define TRUE 1
|
|
#define FALSE 0
|
|
#define PRINT(...) fprintf(stderr, __VA_ARGS__);
|
|
|
|
// I miss the Rust type system :(
|
|
typedef uint8_t u8;
|
|
typedef uint16_t u16;
|
|
typedef uint32_t u32;
|
|
|
|
#if UINTPTR_MAX == 0xffff
|
|
typedef uint16_t usize;
|
|
#elif UINTPTR_MAX == 0xffffffff
|
|
typedef uint32_t usize;
|
|
#elif UINTPTR_MAX == 0xffffffffffffffff
|
|
typedef uint64_t usize;
|
|
#endif
|
|
|
|
|
|
char esc = (char) 27;
|
|
usize width;
|
|
usize height;
|
|
usize palette[] = { 0x00, 0xff0000, 0xff6611, 0xffff66, 0xffffff };
|
|
usize *pixels;
|
|
|
|
void dofire ( void );
|
|
void draw ( void );
|
|
|
|
int
|
|
main ( void )
|
|
{
|
|
// populate width and height
|
|
struct winsize w;
|
|
ioctl(0, TIOCGWINSZ, &w);
|
|
|
|
width = w.ws_col;
|
|
height = w.ws_row;
|
|
|
|
pixels = (usize*) calloc((width * height), sizeof(usize));
|
|
|
|
// init pixels
|
|
for (usize c = 0; c < (width * height); c++) pixels[c] = (usize) NULL;
|
|
for (usize i = 0; i < width; i++)
|
|
{
|
|
pixels[((width * (height - 1)) - width) + i] = palette[4];
|
|
}
|
|
|
|
draw();
|
|
dofire();
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
dofire ( void )
|
|
{
|
|
for (usize x = 0; x < width; x++)
|
|
{
|
|
for (usize y = 0; y < height; y++)
|
|
{
|
|
usize src = y * width + x;
|
|
usize random = 0;//(rand() % 7) & 3;
|
|
usize dest = src - random + 1;
|
|
usize color;
|
|
|
|
if (width > dest ) dest = 0;
|
|
else dest -= width;
|
|
|
|
color = pixels[src];
|
|
|
|
if (color == 0 || color == (usize) NULL)
|
|
pixels[(src - width) % ((width * height) - 1)] = palette[0];
|
|
else
|
|
pixels[(dest - width) % ((width * height) - 1)] = pixels[src] - (random & 1);
|
|
draw();
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
draw ( void )
|
|
{
|
|
// clear screen
|
|
PRINT("%c[2J", esc);
|
|
|
|
// draw pixels onto screen
|
|
for (usize y = 0; y < height; y++)
|
|
{
|
|
for (usize x = 0; x < width; x++)
|
|
{
|
|
usize color = pixels[y * width + x];
|
|
if (color == (usize) NULL) continue;
|
|
|
|
// extract RGB value from color
|
|
u8 blue = color % 256;
|
|
u8 green = ((color - blue) / 256) % 256;
|
|
u8 red = ((color - blue) / (int)pow((double)256, (double)2))-(green / 256);
|
|
|
|
PRINT("%c[48;2;%i;%i;%im %c[0m", esc, red, blue, green, esc);
|
|
}
|
|
PRINT("\n");
|
|
}
|
|
}
|