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nothings-stb/tests/grid_reachability.c

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#define STB_CONNECTED_COMPONENTS_IMPLEMENTATION
#define STBCC_GRID_COUNT_X_LOG2 10
#define STBCC_GRID_COUNT_Y_LOG2 10
#include "stb_connected_components.h"
#ifdef GRID_TEST
#include <windows.h>
#include <stdio.h>
#include <direct.h>
//#define STB_DEFINE
#include "stb.h"
//#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
//#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_image_write.h"
typedef struct
{
uint16 x,y;
} point;
point leader[1024][1024];
uint32 color[1024][1024];
point find(int x, int y)
{
point p,q;
p = leader[y][x];
if (p.x == x && p.y == y)
return p;
q = find(p.x, p.y);
leader[y][x] = q;
return q;
}
void onion(int x1, int y1, int x2, int y2)
{
point p = find(x1,y1);
point q = find(x2,y2);
if (p.x == q.x && p.y == q.y)
return;
leader[p.y][p.x] = q;
}
void reference(uint8 *map, int w, int h)
{
int i,j;
for (j=0; j < h; ++j) {
for (i=0; i < w; ++i) {
leader[j][i].x = i;
leader[j][i].y = j;
}
}
for (j=1; j < h-1; ++j) {
for (i=1; i < w-1; ++i) {
if (map[j*w+i] == 255) {
if (map[(j+1)*w+i] == 255) onion(i,j, i,j+1);
if (map[(j)*w+i+1] == 255) onion(i,j, i+1,j);
}
}
}
for (j=0; j < h; ++j) {
for (i=0; i < w; ++i) {
uint32 c = 0xff000000;
if (leader[j][i].x == i && leader[j][i].y == j) {
if (map[j*w+i] == 255)
c = stb_randLCG() | 0xff404040;
}
color[j][i] = c;
}
}
for (j=0; j < h; ++j) {
for (i=0; i < w; ++i) {
if (leader[j][i].x != i || leader[j][i].y != j) {
point p = find(i,j);
color[j][i] = color[p.y][p.x];
}
}
}
}
void write_map(stbcc_grid *g, int w, int h, char *filename)
{
int i,j;
for (j=0; j < h; ++j) {
for (i=0; i < w; ++i) {
unsigned int c;
c = stbcc_get_unique_id(g,i,j);
c = stb_rehash_improved(c)&0xffffff;
if (c == STBCC_NULL_UNIQUE_ID)
c = 0xff000000;
else
c = (~c)^0x555555;
if (i % 32 == 0 || j %32 == 0) {
int r = (c >> 16) & 255;
int g = (c >> 8) & 255;
int b = c & 255;
r = (r+130)/2;
g = (g+130)/2;
b = (b+130)/2;
c = 0xff000000 + (r<<16) + (g<<8) + b;
}
color[j][i] = c;
}
}
stbi_write_png(filename, w, h, 4, color, 4*w);
}
void test_connected(stbcc_grid *g)
{
int n = stbcc_query_grid_node_connection(g, 512, 90, 512, 871);
//printf("%d ", n);
}
static char *message;
LARGE_INTEGER start;
void start_timer(char *s)
{
message = s;
QueryPerformanceCounter(&start);
}
void end_timer(void)
{
LARGE_INTEGER end, freq;
double tm;
QueryPerformanceCounter(&end);
QueryPerformanceFrequency(&freq);
tm = (end.QuadPart - start.QuadPart) / (double) freq.QuadPart;
printf("%6.4lf ms: %s\n", tm * 1000, message);
}
extern void quicktest(void);
int loc[5000][2];
int main(int argc, char **argv)
{
stbcc_grid *g;
int w,h, i,j,k=0, count=0, r;
uint8 *map = stbi_load("data/map_03.png", &w, &h, 0, 1);
assert(map);
quicktest();
for (j=0; j < h; ++j)
for (i=0; i < w; ++i)
map[j*w+i] = ~map[j*w+i];
for (i=0; i < w; ++i)
for (j=0; j < h; ++j)
//map[j*w+i] = (((i+1) ^ (j+1)) >> 1) & 1 ? 255 : 0;
map[j*w+i] = stb_max(abs(i-w/2),abs(j-h/2)) & 1 ? 255 : 0;
//map[j*w+i] = (((i ^ j) >> 5) ^ (i ^ j)) & 1 ? 255 : 0;
//map[j*w+i] = stb_rand() & 1 ? 255 : 0;
#if 1
for (i=0; i < 100000; ++i)
map[(stb_rand()%h)*w + stb_rand()%w] ^= 255;
#endif
_mkdir("tests/output/stbcc");
stbi_write_png("tests/output/stbcc/reference.png", w, h, 1, map, 0);
//reference(map, w, h);
g = malloc(stbcc_grid_sizeof());
printf("Size: %d\n", stbcc_grid_sizeof());
#if 0
memset(map, 0, w*h);
stbcc_init_grid(g, map, w, h);
{
int n;
char **s = stb_stringfile("c:/x/clockwork_update.txt", &n);
write_map(g, w, h, "tests/output/stbcc/base.png");
for (i=1; i < n; i += 1) {
int x,y,t;
sscanf(s[i], "%d %d %d", &x, &y, &t);
if (i == 571678)
write_map(g, w, h, stb_sprintf("tests/output/stbcc/clockwork_good.png", i));
stbcc_update_grid(g, x, y, t);
if (i == 571678)
write_map(g, w, h, stb_sprintf("tests/output/stbcc/clockwork_bad.png", i));
//if (i > 571648 && i <= 571712)
//write_map(g, w, h, stb_sprintf("tests/output/stbcc/clockwork_%06d.png", i));
}
write_map(g, w, h, stb_sprintf("tests/output/stbcc/clockwork_%06d.png", i-1));
}
return 0;
#endif
start_timer("init");
stbcc_init_grid(g, map, w, h);
end_timer();
//g = stb_file("c:/x/clockwork_path.bin", 0);
write_map(g, w, h, "tests/output/stbcc/base.png");
for (i=0; i < 5000;) {
loc[i][0] = stb_rand() % w;
loc[i][1] = stb_rand() % h;
if (stbcc_query_grid_open(g, loc[i][0], loc[i][1]))
++i;
}
r = 0;
start_timer("reachable");
for (i=0; i < 2000; ++i) {
for (j=0; j < 2000; ++j) {
int x1 = loc[i][0], y1 = loc[i][1];
int x2 = loc[2000+j][0], y2 = loc[2000+j][1];
r += stbcc_query_grid_node_connection(g, x1,y1, x2,y2);
}
}
end_timer();
printf("%d reachable\n", r);
printf("Cluster size: %d,%d\n", STBCC__CLUSTER_SIZE_X, STBCC__CLUSTER_SIZE_Y);
#if 1
for (j=0; j < 10; ++j) {
for (i=0; i < 5000; ++i) {
loc[i][0] = stb_rand() % w;
loc[i][1] = stb_rand() % h;
}
start_timer("updating 2500");
for (i=0; i < 2500; ++i) {
if (stbcc_query_grid_open(g, loc[i][0], loc[i][1]))
stbcc_update_grid(g, loc[i][0], loc[i][1], 1);
else
stbcc_update_grid(g, loc[i][0], loc[i][1], 0);
}
end_timer();
write_map(g, w, h, stb_sprintf("tests/output/stbcc/update_random_%d.png", j*i));
}
#endif
#if 0
start_timer("removing");
count = 0;
for (i=0; i < 1800; ++i) {
int x,y,a,b;
x = stb_rand() % (w-32);
y = stb_rand() % (h-32);
if (i & 1) {
for (a=0; a < 32; ++a)
for (b=0; b < 1; ++b)
if (stbcc_query_grid_open(g, x+a, y+b)) {
stbcc_update_grid(g, x+a, y+b, 1);
++count;
}
} else {
for (a=0; a < 1; ++a)
for (b=0; b < 32; ++b)
if (stbcc_query_grid_open(g, x+a, y+b)) {
stbcc_update_grid(g, x+a, y+b, 1);
++count;
}
}
//if (i % 100 == 0) write_map(g, w, h, stb_sprintf("tests/output/stbcc/open_random_%d.png", i+1));
}
end_timer();
printf("Removed %d grid spaces\n", count);
write_map(g, w, h, stb_sprintf("tests/output/stbcc/open_random_%d.png", i));
r = 0;
start_timer("reachable");
for (i=0; i < 1000; ++i) {
for (j=0; j < 1000; ++j) {
int x1 = loc[i][0], y1 = loc[i][1];
int x2 = loc[j][0], y2 = loc[j][1];
r += stbcc_query_grid_node_connection(g, x1,y1, x2,y2);
}
}
end_timer();
printf("%d reachable\n", r);
start_timer("adding");
count = 0;
for (i=0; i < 1800; ++i) {
int x,y,a,b;
x = stb_rand() % (w-32);
y = stb_rand() % (h-32);
if (i & 1) {
for (a=0; a < 32; ++a)
for (b=0; b < 1; ++b)
if (!stbcc_query_grid_open(g, x+a, y+b)) {
stbcc_update_grid(g, x+a, y+b, 0);
++count;
}
} else {
for (a=0; a < 1; ++a)
for (b=0; b < 32; ++b)
if (!stbcc_query_grid_open(g, x+a, y+b)) {
stbcc_update_grid(g, x+a, y+b, 0);
++count;
}
}
//if (i % 100 == 0) write_map(g, w, h, stb_sprintf("tests/output/stbcc/close_random_%d.png", i+1));
}
end_timer();
write_map(g, w, h, stb_sprintf("tests/output/stbcc/close_random_%d.png", i));
printf("Added %d grid spaces\n", count);
#endif
#if 0 // for map_02.png
start_timer("process");
for (k=0; k < 20; ++k) {
for (j=0; j < h; ++j) {
int any=0;
for (i=0; i < w; ++i) {
if (map[j*w+i] > 10 && map[j*w+i] < 250) {
//start_timer(stb_sprintf("open %d,%d", i,j));
stbcc_update_grid(g, i, j, 0);
test_connected(g);
//end_timer();
any = 1;
}
}
if (any) write_map(g, w, h, stb_sprintf("tests/output/stbcc/open_row_%04d.png", j));
}
for (j=0; j < h; ++j) {
int any=0;
for (i=0; i < w; ++i) {
if (map[j*w+i] > 10 && map[j*w+i] < 250) {
//start_timer(stb_sprintf("close %d,%d", i,j));
stbcc_update_grid(g, i, j, 1);
test_connected(g);
//end_timer();
any = 1;
}
}
if (any) write_map(g, w, h, stb_sprintf("tests/output/stbcc/close_row_%04d.png", j));
}
}
end_timer();
#endif
return 0;
}
#endif
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