| 26 |
|
my = (y0 + y1) >> 1; |
| 27 |
|
/* see what to do */ |
| 28 |
|
if (l[0][0] > mx) |
| 29 |
< |
quads &= ~(CHF(2)|CHF(0)); |
| 29 |
> |
quads &= ~(CHF(UL)|CHF(DL)); |
| 30 |
|
else if (l[0][1] < mx) |
| 31 |
< |
quads &= ~(CHF(3)|CHF(1)); |
| 31 |
> |
quads &= ~(CHF(UR)|CHF(DR)); |
| 32 |
|
if (l[1][0] > my) |
| 33 |
< |
quads &= ~(CHF(1)|CHF(0)); |
| 33 |
> |
quads &= ~(CHF(DR)|CHF(DL)); |
| 34 |
|
else if (l[1][1] < my) |
| 35 |
< |
quads &= ~(CHF(3)|CHF(2)); |
| 35 |
> |
quads &= ~(CHF(UR)|CHF(UL)); |
| 36 |
|
tp->flgs |= quads; /* mark quadrants for update */ |
| 37 |
|
/* climb the branches */ |
| 38 |
|
for (i = 0; i < 4; i++) |
