8 constexpr static const uint FirstVertical = 8;
9 constexpr static const uint Count = 10;
10 constexpr GridDirection(uint8_t i) : id(i) { assert(
id <= 0xa); }
11 constexpr GridDirection() { }
13 uint n()
const {
return id; }
14 constexpr uint32_t mask()
const {
return (1 <<
id); }
15 bool _isDiagonal()
const { assert(!isVertical());
return id & 0x1; }
16 bool isDiagonal()
const {
return (
id & 0x1) && (
id < 8); }
17 bool isZero()
const {
return id == 0xa; }
18 bool isVertical()
const {
return (
id == 8) || (
id == 9); }
19 bool is2D()
const {
return id < 8; }
20 bool operator==(
const GridDirection &d)
const {
return id == d.id; }
21 GridDirection& operator++() {
id += 1;
return *
this; }
22 GridDirection& operator=(
const GridDirection &d) {
id = d.id;
return *
this; }
23 int dx()
const {
return dXYZ[id][0]; }
24 int dy()
const {
return dXYZ[id][1]; }
25 int dz()
const {
return dXYZ[id][2]; }
27 Vector_2 vec2()
const { assert(
id <= 7);
return sVec[id]; }
28 int deg()
const { assert(
id <= 7);
return 90 -
id * 45 + (
id >= 3 ? 0 : 360); }
29 GridDirection opposite()
const {
return GridDirection(sOpposites[
id]); }
30 GridDirection rotatedCcw45(uint n = 1)
const { assert(
id < 8);
return GridDirection((
id - n) & 0x7); }
31 GridDirection rotatedCw45(uint n = 1)
const { assert(
id < 8);
return GridDirection((
id + n) & 0x7); }
32 GridDirection rotatedCcw(
int degrees)
const;
33 uint8_t get45DegreeStepsBetween(
const GridDirection &d)
const;
34 const char *str()
const {
return sStrings[std::min(
id, uint8_t(10))]; }
35 static GridDirection Degrees(
int);
36 static GridDirection fromSigns(
const Vector_2&, Real zeroThreshold = 0x1.0p-10);
37 constexpr static GridDirection begin() {
return GridDirection(0); }
38 constexpr static GridDirection hend() {
return GridDirection(8); }
39 constexpr static GridDirection vend() {
return GridDirection(10); }
40 constexpr static GridDirection U() {
return GridDirection(0); }
41 constexpr static GridDirection UR() {
return GridDirection(1); }
42 constexpr static GridDirection R() {
return GridDirection(2); }
43 constexpr static GridDirection DR() {
return GridDirection(3); }
44 constexpr static GridDirection D() {
return GridDirection(4); }
45 constexpr static GridDirection DL() {
return GridDirection(5); }
46 constexpr static GridDirection L() {
return GridDirection(6); }
47 constexpr static GridDirection UL() {
return GridDirection(7); }
48 constexpr static GridDirection A() {
return GridDirection(8); }
49 constexpr static GridDirection V() {
return GridDirection(9); }
50 constexpr static GridDirection Z() {
return GridDirection(10); }
51 static const int dXYZ[11][3];
52 static const Vector_2 sVec[11];
53 static const uint8_t sOpposites[11];
54 static const char *sStrings[11];
1.15.0