transvoxel/implementation/
aux_tables.rs

1use super::super::transition_sides::TransitionSide::*;
2use super::super::voxel_coordinates::*;
3use super::rotation::*;
4
5// Indexed by TransitionSide
6// Gives world coords of UVW: base, XYZ of U, XYZ of V, XYZ of W
7// and UVW coords of world coords: base, UVW of X, UVW of Y, UVW of Z
8#[rustfmt::skip]
9pub const ROTATIONS: [Rotation; 6] = [
10    Rotation::from(
11        LowX,
12        (0, 0, 1), (0, 0, -1), (0, 1, 0), (1, 0, 0),
13        (1, 0, 0), (0, 0, 1), (0, 1, 0), (-1, 0, 0)), // +X is +W, +Y is +V, +Z is -U
14    Rotation::from(
15        HighX,
16        (1, 0, 0), (0, 0, 1), (0, 1, 0), (-1, 0, 0),
17        (0, 0, 1), (0, 0, -1), (0, 1, 0), (1, 0, 0)),
18    Rotation::from(
19        LowY,
20        (0, 0, 1), (1, 0, 0), (0, 0, -1), (0, 1, 0), // U: +X, V: -Z, W: +Y
21        (0, 1, 0), (1, 0, 0), (0, 0, 1), (0, -1, 0)),
22    Rotation::from(
23        HighY,
24        (0, 1, 0), (1, 0, 0), (0, 0, 1), (0, -1, 0),
25        (0, 0, 1), (1, 0, 0), (0, 0, -1), (0, 1, 0)),
26    Rotation::from(
27        LowZ,
28        (0, 0, 0), (1, 0, 0), (0, 1, 0), (0, 0, 1), // U: +X, V: +Y, W: +Z
29        (0, 0, 0), (1, 0, 0), (0, 1, 0), (0, 0, 1)),
30    Rotation::from(
31        HighZ,
32        (1, 0, 1), (-1, 0, 0), (0, 1, 0), (0, 0, -1),
33        (1, 0, 1), (-1, 0, 0), (0, 1, 0), (0, 0, -1)),
34];
35
36pub struct RegularCellVoxelIndex(pub usize);
37
38pub const REGULAR_CELL_VOXELS: [RegularVoxelDelta; 8] = [
39    RegularVoxelDelta { x: 0, y: 0, z: 0 }, // Voxel 0 is the cell "origin" [with the lowest x, y, and z]
40    RegularVoxelDelta { x: 1, y: 0, z: 0 }, // Voxel 1 == 1 toward X
41    RegularVoxelDelta { x: 0, y: 1, z: 0 }, // Voxel 2 == 1 toward Y
42    RegularVoxelDelta { x: 1, y: 1, z: 0 },
43    RegularVoxelDelta { x: 0, y: 0, z: 1 },
44    RegularVoxelDelta { x: 1, y: 0, z: 1 },
45    RegularVoxelDelta { x: 0, y: 1, z: 1 },
46    RegularVoxelDelta { x: 1, y: 1, z: 1 },
47];
48
49pub fn get_regular_voxel_delta(index: RegularCellVoxelIndex) -> RegularVoxelDelta {
50    REGULAR_CELL_VOXELS[index.0]
51}
52
53// From 0 to C
54pub struct TransitionCellGridPointIndex(pub usize);
55
56pub enum TransitionCellGridPoint {
57    HighResFace(HighResolutionVoxelDelta),
58    RegularFace(usize, usize),
59}
60
61const fn tcell_highres_face_gridpoint(u: isize, v: isize) -> TransitionCellGridPoint {
62    TransitionCellGridPoint::HighResFace(HighResolutionVoxelDelta { u, v, w: 0 })
63}
64
65const fn tcell_reg_face_gridpoint(u: usize, v: usize) -> TransitionCellGridPoint {
66    TransitionCellGridPoint::RegularFace(u, v)
67}
68
69pub const TRANSITION_CELL_GRID_POINTS: [TransitionCellGridPoint; 13] = [
70    tcell_highres_face_gridpoint(0, 0),
71    tcell_highres_face_gridpoint(1, 0),
72    tcell_highres_face_gridpoint(2, 0),
73    tcell_highres_face_gridpoint(0, 1),
74    tcell_highres_face_gridpoint(1, 1),
75    tcell_highres_face_gridpoint(2, 1),
76    tcell_highres_face_gridpoint(0, 2),
77    tcell_highres_face_gridpoint(1, 2),
78    tcell_highres_face_gridpoint(2, 2),
79    tcell_reg_face_gridpoint(0, 0),
80    tcell_reg_face_gridpoint(1, 0),
81    tcell_reg_face_gridpoint(0, 1),
82    tcell_reg_face_gridpoint(1, 1),
83];
84
85pub const TRANSITION_HIGH_RES_FACE_CASE_CONTRIBUTIONS: [(HighResolutionVoxelDelta, usize); 9] = [
86    (HighResolutionVoxelDelta::from(0, 0, 0), 0x01),
87    (HighResolutionVoxelDelta::from(1, 0, 0), 0x02),
88    (HighResolutionVoxelDelta::from(2, 0, 0), 0x04),
89    (HighResolutionVoxelDelta::from(0, 1, 0), 0x80),
90    (HighResolutionVoxelDelta::from(1, 1, 0), 0x100),
91    (HighResolutionVoxelDelta::from(2, 1, 0), 0x08),
92    (HighResolutionVoxelDelta::from(0, 2, 0), 0x40),
93    (HighResolutionVoxelDelta::from(1, 2, 0), 0x20),
94    (HighResolutionVoxelDelta::from(2, 2, 0), 0x10),
95];
transvoxel/implementation/aux_tables.rs

transvoxel/implementation/
aux_tables.rs
