Hãy lười biếng và điều chỉnh câu trả lời của tôi từ câu hỏi này !
Thuật toán tính toán một "đường dẫn rắn" bắt đầu từ góc trên bên trái lấp đầy toàn bộ hình chữ nhật. Con rắn chỉ có thể đi lên, xuống, trái, phải.
Con đường rắn được theo dõi và được lấp đầy với màu đầu tiên, sau đó là màu thứ hai, v.v ... có tính đến tỷ lệ phần trăm màu
Thuật toán này tạo ra rất nhiều đường thẳng; để cải thiện nó, tôi phát hiện ra chúng và thay thế chúng bằng "sóng" giữ cùng một lượng pixel.
Thông số: 380 260 233 420 1300 3511 4772 5089 9507 22107 25117 26744
Thông số: 380 260 8 5 6 7 8 4 5 6 7 9 4 6 9 5 8 7 5
Thời kỳ đen tối của lạc đà (213 307 1 1 1)
Mật mã:
package map;
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import javax.imageio.ImageIO;
public class GenMap2 {
private enum State { NO, YES, SHIFT };
public final static int TOP = 1, BOTTOM = 2, LEFT = 4, RIGHT = 8;
enum Action { ADD_LINE_TOP, ADD_LINE_LEFT, DOUBLE_SIZE, CREATE};
public static void main(String[] args) throws IOException {
int w = Integer.parseInt(args[0]), h = Integer.parseInt(args[1]);
List<Integer> areas = new ArrayList<Integer>();
int total = 0;
for (int i = 2; i < args.length; i++) {
int area = Integer.parseInt(args[i]);
areas.add(area);
total += area;
}
Collections.sort(areas);
Collections.reverse(areas);
int [][] tab = build(w, h);
BufferedImage dest = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
int [] black = {0, 0, 0};
for (int j = 0; j < dest.getHeight(); j++) {
for (int i = 0; i < dest.getWidth(); i++) {
dest.getRaster().setPixel(i, j, black);
}
}
int x = 0, y = -1;
int go = BOTTOM, previous = BOTTOM;
List<Color> colors = new ArrayList<Color>();
Random rand = new Random(0); // prog must be deterministic
while (colors.size() < areas.size()) {
Color c = new Color(rand.nextInt(256), rand.nextInt(256), rand.nextInt(256));
boolean ok = true;
for (Color existing : colors) {
if (existing.equals(c)) {
ok = false;
break;
}
}
if (ok) {
colors.add(c);
}
}
int [][] map = new int[w][h];
int cpt = 0;
while (true) {
if (go == BOTTOM) y++;
if (go == TOP) y--;
if (go == LEFT) x--;
if (go == RIGHT) x++;
int tmp = (int)(((long)cpt) * total / (w * h));
int i = 0;
for (i = 0; i < areas.size(); i++) {
int area = areas.get(i);
if (tmp < area) {
break;
}
tmp -= area;
}
map[x][y] = i;
previous = go;
go = -1;
if ((tab[x][y] & TOP) != 0 && previous != BOTTOM) go = TOP;
if ((tab[x][y] & BOTTOM) != 0 && previous != TOP) go = BOTTOM;
if ((tab[x][y] & LEFT) != 0 && previous != RIGHT) go = LEFT;
if ((tab[x][y] & RIGHT) != 0 && previous != LEFT) go = RIGHT;
if (go == -1) break;
cpt++;
}
String [] src0 = srcPattern(16);
String [] repl0 = destPattern(16);
while (findPattern(map, src0, Arrays.asList(repl0, flip(repl0)))){}
while (findPattern(map, rotate(src0), Arrays.asList(rotate(repl0), rotate(flip(repl0))))){}
String [] src1 = srcPattern(8);
String [] repl1 = destPattern(8);
while (findPattern(map, src1, Arrays.asList(repl1, flip(repl1)))){}
while (findPattern(map, rotate(src1), Arrays.asList(rotate(repl1), rotate(flip(repl1))))){}
String [] src2 = srcPattern(4);
String [] repl2 = destPattern(4);
while (findPattern(map, src2, Arrays.asList(repl2, flip(repl2)))){}
while (findPattern(map, rotate(src2), Arrays.asList(rotate(repl2), rotate(flip(repl2))))){}
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
Color c = colors.get(map[x][y]);
dest.getRaster().setPixel(x, y, new int[] {c.getRed(), c.getGreen(), c.getBlue()});
}
}
ImageIO.write(dest, "png", new FileOutputStream("map.png"));
}
private static Random randPat = new Random(0);
private static String [] srcPattern(int size) {
String [] ret = new String[size*2];
for (int i = 0; i < size*2; i++) {
ret[i] = "";
for (int j = 0; j < size*4; j++) {
ret[i] += i < size ? "1" : "2";
}
}
return ret;
}
private static String [] destPattern(int size) {
String [] ret = new String[size*2];
for (int i = 0; i < size*2; i++) {
ret[i] = "";
for (int j = 0; j < size*2; j++) {
//int target = (int)((1 + Math.sin(j * Math.PI * .5/ size) * .4) * size);
int target = (int)((1 + (Math.cos(j * Math.PI/ size) - 1) * .2) * size);
ret[i] += (i < target) ? '1' : '2';
}
}
for (int i = 0; i < size*2; i++) {
for (int j = 0; j < size*2; j++) {
ret[i] += ret[size*2 - 1 - i].charAt(size*2 - 1 - j) == '1' ? '2' : '1';
}
}
return ret;
}
private static String [] flip(String [] pat) {
String [] ret = new String[pat.length];
for (int i = 0; i < ret.length; i++) {
ret[i] = new StringBuilder(pat[i]).reverse().toString();
}
return ret;
}
private static String [] rotate(String [] pat) {
String [] ret = new String[pat[0].length()];
for (int i = 0; i < ret.length; i++) {
ret[i] = "";
for (int j = 0; j < pat.length; j++) {
ret[i] += pat[j].charAt(i);
}
}
return ret;
}
private static boolean findPattern(int [][] map, String [] src, List<String []> dest) {
for (int y = 0; y < map[0].length - src.length; y++) {
for (int x = 0; x < map.length - src[0].length(); x++) {
int c1 = -1, c2 = -1;
boolean wrong = false;
for (int y1 = 0; y1 < src.length; y1++) {
for (int x1 = 0; x1 < src[0].length(); x1++) {
if (src[y1].charAt(x1) == '1') {
if (c1 == -1) {
c1 = map[x+x1][y+y1];
} else {
if (c1 != map[x+x1][y+y1]) {
wrong = true;
}
}
}
if (src[y1].charAt(x1) == '2') {
if (c2 == -1) {
c2 = map[x+x1][y+y1];
} else {
if (c2 != map[x+x1][y+y1]) {
wrong = true;
}
}
}
if (c1 != -1 && c1 == c2) wrong = true;
if (wrong) break;
}
if (wrong) break;
}
if (!wrong) {
System.out.println("Found match at " + x + " " + y);
String [] repl = dest.get(randPat.nextInt(dest.size()));
for (int y1 = 0; y1 < src.length; y1++) {
for (int x1 = 0; x1 < src[0].length(); x1++) {
map[x+x1][y+y1] = repl[y1].charAt(x1) == '1' ? c1 : c2;
}
}
return true;
}
}
}
return false;
}
public static int [][] build(int width, int height) {
List<Action> actions = new ArrayList<Action>();
while (height>1 && width>1) {
if (height % 2 == 1) {
height--;
actions.add(Action.ADD_LINE_TOP);
}
if (width % 2 == 1) {
width--;
actions.add(Action.ADD_LINE_LEFT);
}
if (height%2 == 0 && width%2 == 0) {
actions.add(Action.DOUBLE_SIZE);
height /= 2;
width /= 2;
}
}
actions.add(Action.CREATE);
Collections.reverse(actions);
int [][] tab = null;
for (Action action : actions) {
if (action == Action.CREATE) {
tab = new int[width][height];
if (height >= width) {
for (int i = 0; i < height-1; i++) {
tab[0][i] = TOP|BOTTOM;
}
tab[0][height-1] = TOP;
} else {
tab[0][0] = TOP|RIGHT;
for (int i = 1; i < width-1; i++) {
tab[i][0] = RIGHT|LEFT;
}
tab[width-1][0] = LEFT;
}
}
if (action == Action.DOUBLE_SIZE) {
tab = doubleTab(tab);
}
if (action == Action.ADD_LINE_TOP) {
int [][] tab2 = new int[tab.length][tab[0].length+1];
for (int i = 0; i < tab.length; i++) {
for (int j = 0; j < tab[0].length; j++) {
tab2[i][j+1] = tab[i][j];
}
}
tab2[0][0] = BOTTOM|RIGHT;
for (int i = 1; i < tab.length-1; i++) {
tab2[i][0] = RIGHT|LEFT;
}
tab2[tab.length-1][0] = TOP|LEFT;
mirror(tab2);
tab = tab2;
}
if (action == Action.ADD_LINE_LEFT) {
int [][] tab2 = new int[tab.length+1][tab[0].length];
for (int i = 0; i < tab.length; i++) {
for (int j = 0; j < tab[0].length; j++) {
tab2[i+1][j] = tab[i][j];
}
}
tab2[0][0] = BOTTOM|RIGHT;
tab2[1][0] |= LEFT;
tab2[1][0] -= TOP;
for (int i = 1; i < tab[0].length-1; i++) {
tab2[0][i] = TOP|BOTTOM;
}
tab2[0][tab[0].length-1] = TOP|BOTTOM;
flip(tab2);
tab = tab2;
}
}
return tab;
}
private static void mirror(int [][] tab) {
for (int i = 0; i < tab.length/2; i++) {
for (int j = 0; j < tab[0].length; j++) {
int tmp = tab[tab.length - 1 - i][j];
tab[tab.length - 1 - i][j] = tab[i][j];
tab[i][j] = tmp;
}
}
for (int i = 0; i < tab.length; i++) {
for (int j = 0; j < tab[0].length; j++) {
if ((tab[i][j] & LEFT)!=0 && (tab[i][j] & RIGHT)==0) {
tab[i][j] -= LEFT; tab[i][j] |= RIGHT;
} else if ((tab[i][j] & RIGHT)!=0 && (tab[i][j] & LEFT)==0) {
tab[i][j] -= RIGHT; tab[i][j] |= LEFT;
}
}
}
}
private static void flip(int [][] tab) {
for (int i = 0; i < tab.length; i++) {
for (int j = 0; j < tab[0].length/2; j++) {
int tmp = tab[i][tab[0].length - 1 - j];
tab[i][tab[0].length - 1 - j] = tab[i][j];
tab[i][j] = tmp;
}
}
for (int i = 0; i < tab.length; i++) {
for (int j = 0; j < tab[0].length; j++) {
if ((tab[i][j] & TOP)!=0 && (tab[i][j] & BOTTOM)==0) {
tab[i][j] -= TOP; tab[i][j] |= BOTTOM;
} else if ((tab[i][j] & BOTTOM)!=0 && (tab[i][j] & TOP)==0) {
tab[i][j] -= BOTTOM; tab[i][j] |= TOP;
}
}
}
}
public static int [][] doubleTab(int [][] tab) {
boolean [][] shiftTop = new boolean[tab.length][],
shiftLeft = new boolean[tab.length][],
shiftBottom = new boolean[tab.length][],
shiftRight = new boolean[tab.length][];
for (int i = 0; i < tab.length; i++) {
shiftTop[i] = new boolean[tab[i].length];
shiftLeft[i] = new boolean[tab[i].length];
shiftBottom[i] = new boolean[tab[i].length];
shiftRight[i] = new boolean[tab[i].length];
}
int x = 0, y = -1;
for (int i = 0; i < tab.length; i++) {
if ((tab[i][0] & TOP) != 0) {
x = i;
}
}
int go = BOTTOM, previous = BOTTOM;
boolean init = false;
while (true) {
if (go == BOTTOM) y++;
if (go == TOP) y--;
if (go == LEFT) x--;
if (go == RIGHT) x++;
previous = go;
go = -1;
if ((tab[x][y] & TOP) != 0 && previous != BOTTOM) go = TOP;
if ((tab[x][y] & BOTTOM) != 0 && previous != TOP) go = BOTTOM;
if ((tab[x][y] & LEFT) != 0 && previous != RIGHT) go = LEFT;
if ((tab[x][y] & RIGHT) != 0 && previous != LEFT) go = RIGHT;
if (previous == BOTTOM) {
shiftTop[x][y] = y==0 ? init : shiftBottom[x][y-1];
}
if (previous == TOP) {
shiftBottom[x][y] = shiftTop[x][y+1];
}
if (previous == RIGHT) {
shiftLeft[x][y] = shiftRight[x-1][y];
}
if (previous == LEFT) {
shiftRight[x][y] = shiftLeft[x+1][y];
}
if (go == -1) break;
if (previous == BOTTOM && go == LEFT) {
shiftLeft[x][y] = !shiftTop[x][y];
}
if (previous == BOTTOM && go == RIGHT) {
shiftRight[x][y] = shiftTop[x][y];
}
if (previous == BOTTOM && go == BOTTOM) {
shiftBottom[x][y] = shiftTop[x][y];
}
if (previous == TOP && go == LEFT) {
shiftLeft[x][y] = shiftBottom[x][y];
}
if (previous == TOP && go == RIGHT) {
shiftRight[x][y] = !shiftBottom[x][y];
}
if (previous == TOP && go == TOP) {
shiftTop[x][y] = shiftBottom[x][y];
}
if (previous == RIGHT && go == TOP) {
shiftTop[x][y] = !shiftLeft[x][y];
}
if (previous == RIGHT && go == BOTTOM) {
shiftBottom[x][y] = shiftLeft[x][y];
}
if (previous == RIGHT && go == RIGHT) {
shiftRight[x][y] = shiftLeft[x][y];
}
if (previous == LEFT && go == TOP) {
shiftTop[x][y] = shiftRight[x][y];
}
if (previous == LEFT && go == BOTTOM) {
shiftBottom[x][y] = !shiftRight[x][y];
}
if (previous == LEFT && go == LEFT) {
shiftLeft[x][y] = shiftRight[x][y];
}
}
int [][] tab2 = new int[tab.length * 2][];
for (int i = 0; i < tab2.length; i++) {
tab2[i] = new int[tab[0].length * 2];
}
for (int i = 0; i < tab.length; i++) {
for (int j = 0; j < tab[0].length; j++) {
State left = State.NO, right = State.NO, top = State.NO, bottom = State.NO;
if ((tab[i][j] & LEFT) != 0) {
left = shiftLeft[i][j] ? State.SHIFT : State.YES;
}
if ((tab[i][j] & TOP) != 0) {
top = shiftTop[i][j] ? State.SHIFT : State.YES;
}
if ((tab[i][j] & RIGHT) != 0) {
right = shiftRight[i][j] ? State.SHIFT : State.YES;
}
if ((tab[i][j] & BOTTOM) != 0) {
bottom = shiftBottom[i][j] ? State.SHIFT : State.YES;
}
int [] comp = compute(left, top, right, bottom);
tab2[i*2][j*2] = comp[0];
tab2[i*2+1][j*2] = comp[1];
tab2[i*2][j*2+1] = comp[2];
tab2[i*2+1][j*2+1] = comp[3];
}
}
return tab2;
}
private static int [] compute(State left, State top, State right, State bottom) {
// |
// --+
//
if (left == State.YES && top == State.SHIFT) {
return new int[] {LEFT|BOTTOM, TOP|BOTTOM, TOP|RIGHT, TOP|LEFT};// "v^>^";
}
if (left == State.SHIFT && top == State.YES) {
return new int[] {TOP|RIGHT, LEFT|BOTTOM, LEFT|RIGHT, LEFT|TOP}; //"^<>^";
}
//
// --+
// |
if (left == State.YES && bottom == State.YES) {
return new int[] {LEFT|RIGHT, LEFT|BOTTOM, RIGHT|BOTTOM, LEFT|TOP}; //">vv<";
}
if (left == State.SHIFT && bottom == State.SHIFT) {
return new int[] {RIGHT|BOTTOM, LEFT|BOTTOM, LEFT|TOP, TOP|BOTTOM}; //">v^v";
}
// |
// +--
//
if (right == State.SHIFT && top == State.SHIFT) {
return new int [] {RIGHT|BOTTOM,LEFT|TOP,TOP|RIGHT, LEFT|RIGHT}; //" v<>>";
}
if (right == State.YES && top == State.YES) {
return new int [] {TOP|BOTTOM,RIGHT|BOTTOM,TOP|RIGHT,TOP|LEFT}; //"v>>^";
}
//
// +--
// |
if (right == State.YES && bottom == State.SHIFT) {
return new int [] {RIGHT|BOTTOM, LEFT|RIGHT, TOP|RIGHT, LEFT|BOTTOM}; //"v<>v";
}
if (right == State.SHIFT && bottom == State.YES) {
return new int [] {RIGHT|BOTTOM, LEFT|BOTTOM, TOP|BOTTOM, RIGHT|TOP}; //"v<v^";
}
//
// --+--
//
if (right == State.YES && left == State.YES) {
return new int [] {LEFT|BOTTOM, RIGHT|BOTTOM, TOP|RIGHT, LEFT|TOP};
}
if (right == State.SHIFT && left == State.SHIFT) {
return new int [] {RIGHT|BOTTOM, LEFT|BOTTOM, LEFT|TOP, RIGHT|TOP};
}
// |
// +
// |
if (top == State.YES && bottom == State.YES) {
return new int [] {TOP|RIGHT, LEFT|BOTTOM, BOTTOM|RIGHT, LEFT|TOP};
}
if (top == State.SHIFT && bottom == State.SHIFT) {
return new int [] {RIGHT|BOTTOM, LEFT|TOP, RIGHT|TOP, LEFT|BOTTOM};
}
//
// +--
//
if (right == State.YES && bottom == State.NO && left == State.NO && top == State.NO) {
return new int [] {BOTTOM, RIGHT|BOTTOM, TOP|RIGHT, LEFT|TOP};
}
if (right == State.SHIFT && bottom == State.NO && left == State.NO && top == State.NO) {
return new int [] {RIGHT|BOTTOM, LEFT|BOTTOM, TOP, RIGHT|TOP};
}
// |
// +
//
if (top == State.YES && bottom == State.NO && left == State.NO && right == State.NO) {
return new int [] {TOP|RIGHT, LEFT|BOTTOM, RIGHT, LEFT|TOP};
}
if (top == State.SHIFT && bottom == State.NO && left == State.NO && right == State.NO) {
return new int [] {BOTTOM|RIGHT, LEFT|TOP, TOP|RIGHT, LEFT};
}
//
// +
// |
if (bottom == State.YES && top == State.NO && left == State.NO && right == State.NO) {
return new int [] {RIGHT, LEFT|BOTTOM, BOTTOM|RIGHT, LEFT|TOP};
}
if (bottom == State.SHIFT && top == State.NO && left == State.NO && right == State.NO) {
return new int [] {BOTTOM|RIGHT, LEFT, TOP|RIGHT, LEFT|BOTTOM};
}
//
// --+
//
if (left == State.YES && bottom == State.NO && right == State.NO && top == State.NO) {
return new int [] {LEFT|BOTTOM, BOTTOM, TOP|RIGHT, LEFT|TOP};
}
if (left == State.SHIFT && bottom == State.NO && right == State.NO && top == State.NO) {
return new int [] {BOTTOM|RIGHT, LEFT|BOTTOM, LEFT|TOP, TOP};
}
return null;
}
}