115 lines
1.8 KiB
C
115 lines
1.8 KiB
C
#include "../config.h"
|
|
#include <stdint.h>
|
|
#include "../random/prng.h"
|
|
#include "../pixel.h"
|
|
#include "../util.h"
|
|
|
|
|
|
#define HEIGHT 12
|
|
#define LINE_DISTANCE 4
|
|
#define SIN_LENGTH 18
|
|
#define SIN_MAX 6
|
|
|
|
// uint8_t sin[SIN_LENGTH] = {0, 1, 2, 2, 3, 3, 4, 4, 4, 3, 3, 3, 2, 2, 1, 0};
|
|
|
|
uint8_t sintab[SIN_LENGTH] = {
|
|
0,
|
|
1,
|
|
2,
|
|
3,
|
|
4,
|
|
5,
|
|
5,
|
|
6,
|
|
6,
|
|
6,
|
|
6,
|
|
6,
|
|
5,
|
|
5,
|
|
4,
|
|
3,
|
|
2,
|
|
1,
|
|
};
|
|
|
|
|
|
/**
|
|
* Shifts the Pixmap one px right
|
|
*/
|
|
static void move(){
|
|
unsigned char plane, row, byte;
|
|
|
|
for(plane=0; plane<NUMPLANE; plane++){
|
|
for(row=NUM_ROWS; row--;){
|
|
for(byte=0; byte < LINEBYTES; byte++){
|
|
pixmap[plane][row][byte] = pixmap[plane][row][byte] >> 1;
|
|
if(byte < LINEBYTES-1){
|
|
pixmap[plane][row][byte] =
|
|
pixmap[plane][row][byte] |
|
|
(pixmap[plane][row][byte+1] & 0x01) << 7;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void dna(){
|
|
uint8_t mid = NUM_COLS / 2;
|
|
uint8_t draw_line = 0;
|
|
|
|
uint8_t top = 0;
|
|
uint8_t bottom = 0;
|
|
|
|
uint8_t top_color = 3;
|
|
uint8_t bottom_color = 2;
|
|
|
|
uint32_t c = 600;
|
|
|
|
uint8_t sinpos = 0;
|
|
|
|
uint8_t direction = 1;
|
|
|
|
clear_screen(0);
|
|
|
|
while(c--){
|
|
top = mid - sintab[sinpos];
|
|
bottom = mid + sintab[sinpos];
|
|
|
|
setpixel((pixel){NUM_COLS-1,top}, top_color);
|
|
setpixel((pixel){NUM_COLS-1,bottom}, bottom_color);
|
|
|
|
if(draw_line == 0){
|
|
for(uint8_t linex = top+1; linex < bottom; linex++){
|
|
setpixel((pixel){NUM_COLS-1, linex}, 1);
|
|
}
|
|
setpixel((pixel){NUM_COLS-1, mid}, 1);
|
|
}
|
|
|
|
if(sinpos == 0){
|
|
if(mid-SIN_MAX <= 0){
|
|
direction = 1;
|
|
}
|
|
if(mid+SIN_MAX >= NUM_ROWS-1){
|
|
direction = -1;
|
|
}
|
|
mid = mid + (random8() > 200) * direction;
|
|
}
|
|
|
|
draw_line = (draw_line+1) % LINE_DISTANCE;
|
|
sinpos = (sinpos + 1) % SIN_LENGTH;
|
|
|
|
if(sinpos == 0){
|
|
uint8_t tmp_color = top_color;
|
|
top_color = bottom_color;
|
|
bottom_color = tmp_color;
|
|
}
|
|
|
|
wait(50);
|
|
move();
|
|
}
|
|
|
|
|
|
}
|
|
|