114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
#include <sysinit.h>
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#include "basic/basic.h"
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#include "basic/config.h"
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#include "lcd/render.h"
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#include "usetable.h"
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#define SCREEN_WIDTH 13
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#define SCREEN_HEIGHT 8
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#define FONT_WIDTH 7
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#define FONT_HEIGHT 8
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#define MATRIX_LINES_LENGTH 15
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#define MAX_LINE_LENGTH 6
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#define TICKS_SHOW_NICKNAME 100
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#define TICKS_HIDE_NICKNAME 50
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#define NICKNAME_ACTION_SHOW 1
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#define NICKNAME_ACTION_HIDE 2
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void ram(void){
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lcdClear();
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// nickname helper variables
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int nickname_len = strlen(GLOBAL(nickname));
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int nickname_posx = (SCREEN_WIDTH - nickname_len) / 2;
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int nickname_posy = SCREEN_HEIGHT / 2;
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// state variables for show/hide effect
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int ticks_until_next_nickname_action = TICKS_SHOW_NICKNAME;
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int nickname_action = NICKNAME_ACTION_SHOW;
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struct matrix_line {
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int head_x, head_y;
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int cur_length;
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int length;
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} matrix_lines[MATRIX_LINES_LENGTH];
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// initialize matrix_lines
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for (int i = 0; i < MATRIX_LINES_LENGTH; i++) {
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matrix_lines[i].cur_length = -1;
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}
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// main loop
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while (1) {
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// for every matrix line
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for(int i = 0; i<MATRIX_LINES_LENGTH; i++) {
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struct matrix_line *ml = matrix_lines + i;
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// create new tail (old tail vanished)
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if (ml->cur_length == -1) {
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ml->head_x = getRandom() % SCREEN_WIDTH;
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ml->head_y = getRandom() % SCREEN_HEIGHT - 1;
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ml->length = getRandom() % MAX_LINE_LENGTH + 3;
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ml->cur_length = 0;
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}
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// set new char
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if (ml->head_y < SCREEN_HEIGHT-1) {
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ml->head_y++;
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char chr;
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int chrpos = ml->head_x - nickname_posx;
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if (nickname_action == NICKNAME_ACTION_SHOW
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&& ml->head_y == nickname_posy
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&& chrpos >= 0 && chrpos < nickname_len) {
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// show the nickname
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chr = GLOBAL(nickname)[chrpos];
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} else {
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chr = getRandom() % 95 + 33;
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}
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DoChar(ml->head_x * FONT_WIDTH, ml->head_y * FONT_HEIGHT, chr);
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ml->cur_length++;
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}
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// remove char (when length or bottom is reached)
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if (ml->cur_length > ml->length || ml->head_y >= SCREEN_HEIGHT-1) {
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int chrpos = ml->head_x - nickname_posx;
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if ( ! (nickname_action == NICKNAME_ACTION_SHOW
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&& (ml->head_y - ml->cur_length) == nickname_posy
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&& chrpos >= 0 && chrpos < nickname_len
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)) {
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// only delete, if it's not the nickname
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DoChar(ml->head_x * FONT_WIDTH, (ml->head_y - ml->cur_length) * FONT_HEIGHT, ' ');
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}
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ml->cur_length--;
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}
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}
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lcdDisplay();
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// show and hide nickname
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ticks_until_next_nickname_action--;
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if (ticks_until_next_nickname_action <= 0) {
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switch (nickname_action) {
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case NICKNAME_ACTION_SHOW:
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nickname_action = NICKNAME_ACTION_HIDE;
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ticks_until_next_nickname_action = TICKS_HIDE_NICKNAME;
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// new nickname_pos
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nickname_posx = getRandom() % (SCREEN_WIDTH - nickname_len);
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nickname_posy = getRandom() % SCREEN_HEIGHT;
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break;
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case NICKNAME_ACTION_HIDE:
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nickname_action = NICKNAME_ACTION_SHOW;
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ticks_until_next_nickname_action = TICKS_SHOW_NICKNAME;
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break;
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}
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}
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// Exit on any key
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int key = getInputRaw();
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if(key!= BTN_NONE)
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return;
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// sleep and process queue (e. g. meshnetwork)
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delayms_queue_plus(90,0);
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};
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};
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