Files
Mindustry/core/src/mindustry/graphics/PlanetGrid.java
2020-01-20 16:14:29 -05:00

267 lines
7.9 KiB
Java

package mindustry.graphics;
import arc.math.*;
import arc.math.geom.*;
import arc.util.*;
//TODO clean this up somehow
public class PlanetGrid{
private static final PlanetGrid[] cache = new PlanetGrid[10];
private static final float x = -0.525731112119133606f;
private static final float z = -0.850650808352039932f;
private static final Vec3[] iTiles = {
new Vec3(-x, 0, z), new Vec3(x, 0, z), new Vec3(-x, 0, -z), new Vec3(x, 0, -z),
new Vec3(0, z, x), new Vec3(0, z, -x), new Vec3(0, -z, x), new Vec3(0, -z, -x),
new Vec3(z, x, 0), new Vec3(-z, x, 0), new Vec3(z, -x, 0), new Vec3(-z, -x, 0)
};
private static final int[][] iTilesP = {
{9, 4, 1, 6, 11}, {4, 8, 10, 6, 0}, {11, 7, 3, 5, 9}, {2, 7, 10, 8, 5},
{9, 5, 8, 1, 0}, {2, 3, 8, 4, 9}, {0, 1, 10, 7, 11}, {11, 6, 10, 3, 2},
{5, 3, 10, 1, 4}, {2, 5, 4, 0, 11}, {3, 7, 6, 1, 8}, {7, 2, 9, 0, 6}
};
public final int size;
public final Ptile[] tiles;
public final Corner[] corners;
public final Edge[] edges;
PlanetGrid(int size){
this.size = size;
tiles = new Ptile[tileCount(size)];
for(int i = 0; i < tiles.length; i++){
tiles[i] = new Ptile(i, i < 12 ? 5 : 6);
}
corners = new Corner[cornerCount(size)];
for(int i = 0; i < corners.length; i++){
corners[i] = new Corner(i);
}
edges = new Edge[edgeCount(size)];
for(int i = 0; i < edges.length; i++){
edges[i] = new Edge(i);
}
}
public static PlanetGrid newGrid(int size){
//cache grids between calls, since only ~5 different grids total are needed
if(size < cache.length && cache[size] != null){
return cache[size];
}
PlanetGrid result;
if(size == 0){
result = initialGrid();
}else{
result = subdividedGrid(newGrid(size - 1));
}
//store grid in cache
if(size < cache.length){
cache[size] = result;
}
return result;
}
static PlanetGrid initialGrid(){
PlanetGrid grid = new PlanetGrid(0);
for(Ptile t : grid.tiles){
t.v = iTiles[t.id];
for(int k = 0; k < 5; k++){
t.tiles[k] = grid.tiles[iTilesP[t.id][k]];
}
}
for(int i = 0; i < 5; i++){
addCorner(i, grid, 0, iTilesP[0][(i + 4) % 5], iTilesP[0][i]);
}
for(int i = 0; i < 5; i++){
addCorner(i + 5, grid, 3, iTilesP[3][(i + 4) % 5], iTilesP[3][i]);
}
addCorner(10, grid, 10, 1, 8);
addCorner(11, grid, 1, 10, 6);
addCorner(12, grid, 6, 10, 7);
addCorner(13, grid, 6, 7, 11);
addCorner(14, grid, 11, 7, 2);
addCorner(15, grid, 11, 2, 9);
addCorner(16, grid, 9, 2, 5);
addCorner(17, grid, 9, 5, 4);
addCorner(18, grid, 4, 5, 8);
addCorner(19, grid, 4, 8, 1);
//add corners to corners
for(Corner c : grid.corners){
for(int k = 0; k < 3; k++){
c.corners[k] = c.tiles[k].corners[(pos(c.tiles[k], c) + 1) % 5];
}
}
//new edges
int nextEdge = 0;
for(Ptile t : grid.tiles){
for(int k = 0; k < 5; k++){
if(t.edges[k] == null){
addEdge(nextEdge++, grid, t.id, iTilesP[t.id][k]);
}
}
}
return grid;
}
static PlanetGrid subdividedGrid(PlanetGrid prev){
PlanetGrid grid = new PlanetGrid(prev.size + 1);
int prevTiles = prev.tiles.length;
int prevCorners = prev.corners.length;
//old tiles
for(int i = 0; i < prevTiles; i++){
grid.tiles[i].v = prev.tiles[i].v;
for(int k = 0; k < grid.tiles[i].edgeCount; k++){
grid.tiles[i].tiles[k] = grid.tiles[prev.tiles[i].corners[k].id + prevTiles];
}
}
//old corners become tiles
for(int i = 0; i < prevCorners; i++){
grid.tiles[i + prevTiles].v = prev.corners[i].v;
for(int k = 0; k < 3; k++){
grid.tiles[i + prevTiles].tiles[2 * k] = grid.tiles[prev.corners[i].corners[k].id + prevTiles];
grid.tiles[i + prevTiles].tiles[2 * k + 1] = grid.tiles[prev.corners[i].tiles[k].id];
}
}
//new corners
int nextCorner = 0;
for(Ptile n : prev.tiles){
Ptile t = grid.tiles[n.id];
for(int k = 0; k < t.edgeCount; k++){
addCorner(nextCorner, grid, t.id, t.tiles[(k + t.edgeCount - 1) % t.edgeCount].id, t.tiles[k].id);
nextCorner++;
}
}
//connect corners
for(Corner c : grid.corners){
for(int k = 0; k < 3; k++){
c.corners[k] = c.tiles[k].corners[(pos(c.tiles[k], c) + 1) % (c.tiles[k].edgeCount)];
}
}
//new edges
int nextEdge = 0;
for(Ptile t : grid.tiles){
for(int k = 0; k < t.edgeCount; k++){
if(t.edges[k] == null){
addEdge(nextEdge, grid, t.id, t.tiles[k].id);
nextEdge++;
}
}
}
return grid;
}
static void addCorner(int id, PlanetGrid grid, int t1, int t2, int t3){
Corner c = grid.corners[id];
Ptile[] t = {grid.tiles[t1], grid.tiles[t2], grid.tiles[t3]};
c.v = Tmp.v31.set(t[0].v).add(t[1].v).add(t[2].v).cpy().nor();
for(int i = 0; i < 3; i++){
t[i].corners[pos(t[i], t[(i + 2) % 3])] = c;
c.tiles[i] = t[i];
}
}
static void addEdge(int id, PlanetGrid grid, int t1, int t2){
Edge e = grid.edges[id];
Ptile[] t = {grid.tiles[t1], grid.tiles[t2]};
Corner[] c = {
grid.corners[t[0].corners[pos(t[0], t[1])].id],
grid.corners[t[0].corners[(pos(t[0], t[1]) + 1) % t[0].edgeCount].id]};
for(int i = 0; i < 2; i++){
t[i].edges[pos(t[i], t[(i + 1) % 2])] = e;
e.tiles[i] = t[i];
c[i].edges[pos(c[i], c[(i + 1) % 2])] = e;
e.corners[i] = c[i];
}
}
static int pos(Ptile t, Ptile n){
for(int i = 0; i < t.edgeCount; i++)
if(t.tiles[i] == n)
return i;
return -1;
}
static int pos(Ptile t, Corner c){
for(int i = 0; i < t.edgeCount; i++)
if(t.corners[i] == c)
return i;
return -1;
}
static int pos(Corner c, Corner n){
for(int i = 0; i < 3; i++)
if(c.corners[i] == n)
return i;
return -1;
}
static int tileCount(int size){
return 10 * Mathf.pow(3, size) + 2;
}
static int cornerCount(int size){
return 20 * Mathf.pow(3, size);
}
static int edgeCount(int size){
return 30 * Mathf.pow(3, size);
}
public static class Ptile{
public final int id;
public final int edgeCount;
public final Ptile[] tiles;
public final Corner[] corners;
public final Edge[] edges;
public Vec3 v = new Vec3();
public Ptile(int id, int edgeCount){
this.id = id;
this.edgeCount = edgeCount;
tiles = new Ptile[edgeCount];
corners = new Corner[edgeCount];
edges = new Edge[edgeCount];
}
}
public static class Corner{
public final int id;
public final Ptile[] tiles = new Ptile[3];
public final Corner[] corners = new Corner[3];
public final Edge[] edges = new Edge[3];
public Vec3 v = new Vec3();
public Vec3 bv = new Vec3();
public Corner(int id){
this.id = id;
}
}
public static class Edge{
public final int id;
public final Ptile[] tiles = new Ptile[2];
public final Corner[] corners = new Corner[2];
public Edge(int id){
this.id = id;
}
}
}