blob: 879b54e1f5ac51a67f9fbf03f03599b772e545c1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
#ifndef Intersections_DEFINE
#define Intersections_DEFINE
class Intersections {
public:
Intersections()
: fUsed(0)
, fSwap(0)
{
bzero(fT, sizeof(fT));
}
void add(double one, double two) {
if (fUsed > 0 && approximately_equal(fT[fSwap][fUsed - 1], one)
&& approximately_equal(fT[fSwap ^ 1][fUsed - 1], two)) {
return;
}
fT[fSwap][fUsed] = one;
fT[fSwap ^ 1][fUsed] = two;
++fUsed;
}
void offset(int base, double start, double end) {
for (int index = base; index < fUsed; ++index) {
double val = fT[fSwap][index];
val *= end - start;
val += start;
fT[fSwap][index] = val;
}
}
bool intersected() {
return fUsed > 0;
}
void swap() {
fSwap ^= 1;
}
bool swapped() {
return fSwap;
}
int used() {
return fUsed;
}
double fT[2][9];
int fUsed;
private:
int fSwap;
};
#endif
|