int main() {
char filename[] = "cardioid.png";
struct image *i;
int x,y;
double a, r;
i = draw_create_image(300,300);
draw_full(i, white);
draw_color(i, black);
for(x=-4;x<=4;x++) draw_textf(i, 150+x*30+3,150+3, 1, "%d", x);
for(y=-4;y<=4;y++) draw_textf(i, 150+3,150-y*30+4, 1, "%d", y);
draw_color(i,blue);
for(x=0;x<300;x+=30) draw_line(i, x,0, x,i->height-1);
for(y=0;y<300;y+=30) draw_line(i, 0,y, i->width-1,y);
draw_box(i, 0,0, i->width-1,i->height-1);
draw_color(i, black);
for(x=-1;x<=1;x++)
draw_line(i, 150+x,0, 150+x,i->height-1);
for(y=-1;y<=1;y++)
draw_line(i, 0,150+y, i->width-1,150+y);
draw_color(i, green);
/* Cardioid */
for(a = 0.0; a < 360.0; a += 0.5) {
r = 0.0 - sin(0.5*a/180*M_PI)*120.0;
draw_pixel(i, 150+sin(a/180*M_PI)*r, 150+cos(a/180*M_PI)*r, red);
}
draw_color(i, black);
draw_textf(i, 5,i->height-16-2, 2, "Cardioid");
draw_write_png(i, filename);
draw_free_image(i);
return 0;
}
void fill_vbat_arr(char *arr, long vbat)
{
long relax_vbat;
substract_charge(vbat);
switch (g_state)
{
case STATE_CHARGED:
{
draw_full(arr);
if (vbat < 1000 * VBATOCVDOWN)
{
g_average = vbat;
g_relax_counter = 0;
g_state = STATE_INUSE;
g_relax_in_Vbat = vbat; // Prev vbat in fact
}
}
break;
case STATE_INUSE:
{
draw_charge(arr, g_charge);
g_average = (49 * g_average + vbat) / 50; // 10 seconds average
#ifdef USE_RELAX
relax_vbat = get_relax_t(g_charge);
if (myabs(g_average - vbat) <= RELAX_THRESHOLD ||
vbat > relax_vbat) // 0.15V
g_relax_counter++;
else
g_relax_counter = 0;
if (g_relax_counter > RELAX_EVENTS)
{
g_relax_in_Vbat = vbat;
g_state = STATE_RELAX;
}
#endif
if (vbat < 1000 * VBATLOW ||
g_charge < 1000 * BATLIMIT)
{
g_state = STATE_TOO_LOW;
}
if (vbat > 1000 * VBATOCVUP)
{
g_state = STATE_CHARGING;
}
}
break;
case STATE_RELAX:
{
draw_charge(arr, g_charge);
g_average = (49 * g_average + vbat) / 50; // 10 seconds average
relax_vbat = get_relax_t(g_charge);
if (g_average - vbat >= RELAX_THRESHOLD ||
myabs(g_relax_in_Vbat - vbat) >= RELAX_THRESHOLD ||
(relax_vbat - vbat) > 400)
{
g_relax_counter = 0;
g_state = STATE_INUSE;
}
if (vbat > 1000 * VBATOCVUP)
{
g_state = STATE_CHARGING;
}
if (vbat < 1000 * VBATLOW ||
g_charge < 1000 * BATLIMIT)
{
g_state = STATE_TOO_LOW;
}
}
break;
case STATE_TOO_LOW:
{
draw_alarm(arr);
if (vbat > 1000 * VBATOCVUP)
{
g_state = STATE_CHARGING;
}
g_average = 0;
}
break;
case STATE_CHARGING:
{
draw_charging(arr);
if (vbat > 1000 * VBATENDCHARGE)
{
g_state = STATE_CHARGED;
g_charge = 1000 * BATCAP;
}
draw_charging(arr);
if (vbat < 1000 * VBATRELAXHI)
{
g_state = STATE_INUSE;
}
}
break;
}
}
