Matrix scrolling text animation (#283)

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Stale 2022-04-24 06:54:50 -03:00 committed by GitHub
parent 9fd7779972
commit 6245639daf
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3 changed files with 285 additions and 13 deletions

View File

@ -2,7 +2,9 @@
#animate = false
#animate = true
# the active animation (only animation '0' available for now)
# the active animation
# 0 -> PSX DOOM fire (default)
# 1 -> CMatrix
#animation = 0
# the char used to mask the password

View File

@ -69,11 +69,22 @@ void draw_init(struct term_buf* buf)
#endif
}
static void doom_free(struct term_buf* buf);
static void matrix_free(struct term_buf* buf);
void draw_free(struct term_buf* buf)
{
if (config.animate)
{
free(buf->tmp_buf);
switch (config.animation)
{
case 0:
doom_free(buf);
break;
case 1:
matrix_free(buf);
break;
}
}
}
@ -481,18 +492,118 @@ static void doom_init(struct term_buf* buf)
{
buf->init_width = buf->width;
buf->init_height = buf->height;
buf->astate.doom = malloc(sizeof(struct doom_state));
uint16_t tmp_len = buf->width * buf->height;
buf->tmp_buf = malloc(tmp_len);
tmp_len -= buf->width;
if (buf->tmp_buf == NULL)
if (buf->astate.doom == NULL)
{
dgn_throw(DGN_ALLOC);
}
memset(buf->tmp_buf, 0, tmp_len);
memset(buf->tmp_buf + tmp_len, DOOM_STEPS - 1, buf->width);
uint16_t tmp_len = buf->width * buf->height;
buf->astate.doom->buf = malloc(tmp_len);
tmp_len -= buf->width;
if (buf->astate.doom->buf == NULL)
{
dgn_throw(DGN_ALLOC);
}
memset(buf->astate.doom->buf, 0, tmp_len);
memset(buf->astate.doom->buf + tmp_len, DOOM_STEPS - 1, buf->width);
}
static void doom_free(struct term_buf* buf)
{
free(buf->astate.doom->buf);
free(buf->astate.doom);
}
// Adapted from cmatrix
static void matrix_init(struct term_buf* buf)
{
buf->init_width = buf->width;
buf->init_height = buf->height;
buf->astate.matrix = malloc(sizeof(struct matrix_state));
struct matrix_state* s = buf->astate.matrix;
if (s == NULL)
{
dgn_throw(DGN_ALLOC);
}
uint16_t len = buf->height + 1;
s->grid = malloc(sizeof(struct matrix_dot*) * len);
if (s->grid == NULL)
{
dgn_throw(DGN_ALLOC);
}
len = (buf->height + 1) * buf->width;
(s->grid)[0] = malloc(sizeof(struct matrix_dot) * len);
if ((s->grid)[0] == NULL)
{
dgn_throw(DGN_ALLOC);
}
for (int i = 1; i <= buf->height; ++i)
{
s->grid[i] = s->grid[i - 1] + buf->width;
if (s->grid[i] == NULL)
{
dgn_throw(DGN_ALLOC);
}
}
s->length = malloc(buf->width * sizeof(int));
if (s->length == NULL)
{
dgn_throw(DGN_ALLOC);
}
s->spaces = malloc(buf->width * sizeof(int));
if (s->spaces == NULL)
{
dgn_throw(DGN_ALLOC);
}
s->updates = malloc(buf->width * sizeof(int));
if (s->updates == NULL)
{
dgn_throw(DGN_ALLOC);
}
// Initialize grid
for (int i = 0; i <= buf->height; ++i)
{
for (int j = 0; j <= buf->width - 1; j += 2)
{
s->grid[i][j].val = -1;
}
}
for (int j = 0; j < buf->width; j += 2)
{
s->spaces[j] = (int) rand() % buf->height + 1;
s->length[j] = (int) rand() % (buf->height - 3) + 3;
s->grid[1][j].val = ' ';
s->updates[j] = (int) rand() % 3 + 1;
}
}
static void matrix_free(struct term_buf* buf)
{
free(buf->astate.matrix->grid[0]);
free(buf->astate.matrix->grid);
free(buf->astate.matrix->length);
free(buf->astate.matrix->spaces);
free(buf->astate.matrix->updates);
free(buf->astate.matrix);
}
void animate_init(struct term_buf* buf)
@ -501,11 +612,16 @@ void animate_init(struct term_buf* buf)
{
switch(config.animation)
{
default:
case 0:
{
doom_init(buf);
break;
}
case 1:
{
matrix_init(buf);
break;
}
}
}
}
@ -534,7 +650,7 @@ static void doom(struct term_buf* term_buf)
uint16_t dst;
uint16_t w = term_buf->init_width;
uint8_t* tmp = term_buf->tmp_buf;
uint8_t* tmp = term_buf->astate.doom->buf;
if ((term_buf->width != term_buf->init_width) || (term_buf->height != term_buf->init_height))
{
@ -573,6 +689,130 @@ static void doom(struct term_buf* term_buf)
}
}
// Adapted from cmatrix
static void matrix(struct term_buf* buf)
{
static int frame = 3;
const int frame_delay = 8;
static int count = 0;
bool first_col;
struct matrix_state* s = buf->astate.matrix;
// Allowed codepoints
const int randmin = 33;
const int randnum = 123 - randmin;
// Chars change mid-scroll
const bool changes = true;
if ((buf->width != buf->init_width) || (buf->height != buf->init_height))
{
return;
}
count += 1;
if (count > frame_delay) {
frame += 1;
if (frame > 4) frame = 1;
count = 0;
for (int j = 0; j < buf->width; j += 2)
{
int tail;
if (frame > s->updates[j])
{
if (s->grid[0][j].val == -1 && s->grid[1][j].val == ' ')
{
if (s->spaces[j] > 0)
{
s->spaces[j]--;
} else {
s->length[j] = (int) rand() % (buf->height - 3) + 3;
s->grid[0][j].val = (int) rand() % randnum + randmin;
s->spaces[j] = (int) rand() % buf->height + 1;
}
}
int i = 0, seg_len = 0;
first_col = 1;
while (i <= buf->height)
{
// Skip over spaces
while (i <= buf->height
&& (s->grid[i][j].val == ' ' || s->grid[i][j].val == -1))
{
i++;
}
if (i > buf->height) break;
// Find the head of this col
tail = i;
seg_len = 0;
while (i <= buf->height
&& (s->grid[i][j].val != ' ' && s->grid[i][j].val != -1))
{
s->grid[i][j].is_head = false;
if (changes)
{
if (rand() % 8 == 0)
s->grid[i][j].val = (int) rand() % randnum + randmin;
}
i++;
seg_len++;
}
// Head's down offscreen
if (i > buf->height)
{
s->grid[tail][j].val = ' ';
continue;
}
s->grid[i][j].val = (int) rand() % randnum + randmin;
s->grid[i][j].is_head = true;
if (seg_len > s->length[j] || !first_col) {
s->grid[tail][j].val = ' ';
s->grid[0][j].val = -1;
}
first_col = 0;
i++;
}
}
}
}
uint32_t blank;
utf8_char_to_unicode(&blank, " ");
for (int j = 0; j < buf->width; j += 2) {
for (int i = 1; i <= buf->height; ++i)
{
uint32_t c;
int fg = TB_GREEN;
int bg = TB_DEFAULT;
if (s->grid[i][j].val == -1 || s->grid[i][j].val == ' ')
{
tb_change_cell(j, i - 1, blank, fg, bg);
continue;
}
char tmp[2];
tmp[0] = s->grid[i][j].val;
tmp[1] = '\0';
if(utf8_char_to_unicode(&c, tmp))
{
if (s->grid[i][j].is_head)
{
fg = TB_WHITE | TB_BOLD;
}
tb_change_cell(j, i - 1, c, fg, bg);
}
}
}
}
void animate(struct term_buf* buf)
{
buf->width = tb_width();
@ -582,11 +822,16 @@ void animate(struct term_buf* buf)
{
switch(config.animation)
{
default:
case 0:
{
doom(buf);
break;
}
case 1:
{
matrix(buf);
break;
}
}
}
}

View File

@ -19,6 +19,31 @@ struct box
uint32_t right;
};
struct matrix_dot
{
int val;
bool is_head;
};
struct matrix_state
{
struct matrix_dot** grid;
int* length;
int* spaces;
int* updates;
};
struct doom_state
{
uint8_t* buf;
};
union anim_state
{
struct doom_state* doom;
struct matrix_state* matrix;
};
struct term_buf
{
uint16_t width;
@ -34,7 +59,7 @@ struct term_buf
uint16_t box_width;
uint16_t box_height;
uint8_t* tmp_buf;
union anim_state astate;
};
void draw_init(struct term_buf* buf);