forgot to include stb_connected_components test source file

tests/grid_reachability.c

@@ -0,0 +1,260 @@
+#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);
+         if (c == STBCC_NULL_UNIQUE_ID)
+            c = 0xff000000;
+         else
+            c = ~c;
+         color[j][i] = c;
+      }
+   }
+   stbi_write_png(filename, w, h, 4, color, 0);
+}
+
+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);
+}
+
+int main(int argc, char **argv)
+{
+   stbcc_grid *g;
+
+   int w,h, i,j,k=0, count=0;
+   uint8 *map = stbi_load("data/map_03.png", &w, &h, 0, 1);
+
+   assert(map);
+
+   stbi_write_png("tests/output/stbcc/reference.png", w, h, 1, map, 0);
+
+   for (j=0; j < h; ++j)
+      for (i=0; i < w; ++i)
+         map[j*w+i] = ~map[j*w+i];
+
+   //reference(map, w, h);
+
+   _mkdir("tests/output/stbcc");
+
+   g = malloc(stbcc_grid_sizeof());
+   printf("Size: %d\n", stbcc_grid_sizeof());
+
+   start_timer("init");
+   stbcc_init_grid(g, map, w, h);
+   end_timer();
+   write_map(g, w, h, "tests/output/stbcc/base.png");
+
+   printf("Cluster size: %d,%d\n", STBCC__CLUSTER_SIZE_X, STBCC__CLUSTER_SIZE_Y);
+
+   #if 1
+   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));
+   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