static void magic(struct Bitmap *bitmap, coord_t x, coord_t y)
{
static const coord_t coords[] = { 120, 34, 90, 90, 30, 90, 0, 34, 60, 0, 90, 90, 0, 34, 120, 34, 30, 90, 60, 0 };
unsigned int i;
gfx_moveTo(bitmap, coords[countof(coords)-2]/2 + x, coords[countof(coords)-1]/3 + y);
for (i = 0; i < countof(coords); i += 2)
gfx_lineTo(bitmap, coords[i]/2 + x, coords[i+1]/3 + y);
}
void do_plot() {
delay(1);
for (int i=0; i<181; i+=15) {
nds3_read(i, 1);
delay(1);
}
gfx_term_clear();
uint8_t idx=0;
uint8_t step=1;
uint8_t idist_last=0;
while (idx<=180) {
uint8_t x=64;
uint8_t y=0;
uint8_t idist = nds3_distances[idx];
if (idist<8) idist=4;
if (idist>70) idist=70;
float dir = idx*M_PI/180;
float dist = idist*(63.0/70);
y += sin(dir) * dist;
x += cos(dir) * dist;
if (((idist>idist_last)?(idist-idist_last):(idist_last-idist)) > 6) {
gfx_move(x,y);
gfx_pixel(1);
} else {
gfx_lineTo(x,y);
}
idist_last = idist;
idx+=step;
}
idx=0;
while (idx<=180) {
uint8_t x=64;
uint8_t y=0;
float dir = idx*M_PI/180;
float dist = 63.0;
y += sin(dir) * dist;
x += cos(dir) * dist;
if (idx==0) {
gfx_move(x,y);
} else {
gfx_lineTo(x,y);
}
idx+=step;
}
char txt[10];
int i;
gfx_term_goto(0,0);
i=nds3_distances[0];
sprintf(txt, "%2i\n", i);
gfx_term_print(txt);
i=nds3_distances[14];
sprintf(txt, "%2i\n", i);
gfx_term_print(txt);
i=nds3_distances[15];
sprintf(txt, "%2i\n", i);
gfx_term_print(txt);
}