geom.c: PoC fun with geometric shapes

src/poc/geom.c

@@ -0,0 +1,135 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <locale.h>
+#include <unistd.h>
+#include <notcurses.h>
+
+// fun with the Geometric Shapes
+int main(void){
+  if(!setlocale(LC_ALL, "")){
+    fprintf(stderr, "Couldn't set locale\n");
+    return EXIT_FAILURE;
+  }
+  struct notcurses_options opts;
+  memset(&opts, 0, sizeof(opts));
+  opts.inhibit_alternate_screen = true;
+  struct notcurses* nc = notcurses_init(&opts, stdout);
+  if(nc == NULL){
+    return EXIT_FAILURE;
+  }
+  int y, x, dimy, dimx;
+  struct ncplane* n = notcurses_stdplane(nc);
+  ncplane_dim_yx(n, &dimy, &dimx);
+  // leave a 20% total margin on the sides
+  int margin = dimx / 5;
+  const int xl = margin / 2;
+  const int xr = dimx - xl;
+  int flipmode = 0;
+  struct timespec delay = { .tv_sec = 0, .tv_nsec = 250000000, };
+  while(true){
+    for(int i = xl ; i <= xr ; ++i){
+      if(ncplane_putwc_yx(n, 0, i, i % 2 == flipmode % 2 ? L'◪' : L'◩') <= 0){
+        goto err;
+      }
+    }
+    for(int i = xl ; i <= xr ; ++i){
+      wchar_t w;
+      switch(flipmode % 6){
+        case 0: w = L'🞯'; break;
+        case 1: w = L'🞰'; break;
+        case 2: w = L'🞱'; break;
+        case 3: w = L'🞲'; break;
+        case 4: w = L'🞳'; break;
+        case 5: w = L'🞴'; break;
+        default: goto err;
+      }
+      if(ncplane_putwc_yx(n, 1, i, w) <= 0){
+        goto err;
+      }
+    }
+    for(int i = xl ; i <= xr ; ++i){
+      wchar_t w;
+      switch((i + flipmode) % 5){
+        case 0: w = L'🞅'; break;
+        case 1: w = L'🞆'; break;
+        case 2: w = L'🞇'; break;
+        case 3: w = L'🞈'; break;
+        case 4: w = L'🞉'; break;
+        default: goto err;
+      }
+      if(ncplane_putwc_yx(n, 2, i, w) <= 0){
+        goto err;
+      }
+    }
+    for(int i = xl ; i <= xr ; ++i){
+      wchar_t w;
+      switch((flipmode + 5) % 6){
+        case 0: w = L'🞵'; break;
+        case 1: w = L'🞶'; break;
+        case 2: w = L'🞷'; break;
+        case 3: w = L'🞸'; break;
+        case 4: w = L'🞹'; break;
+        case 5: w = L'🞺'; break;
+        default: goto err;
+      }
+      if(ncplane_putwc_yx(n, 3, i, w) <= 0){
+        goto err;
+      }
+    }
+    for(int i = xl ; i <= xr ; ++i){
+      wchar_t w;
+      switch(flipmode % 11){
+        case 0: w = L'🞌'; break;
+        case 1: w = L'🞍'; break;
+        case 2: w = L'🞎'; break;
+        case 3: w = L'🞏'; break;
+        case 4: w = L'🞐'; break;
+        case 5: w = L'🞑'; break;
+        case 6: w = L'🞒'; break;
+        case 7: w = L'🞓'; break;
+        case 8: w = L'🞔'; break;
+        case 9: w = L'🞕'; break;
+        case 10: w = L'🞖'; break;
+        default: goto err;
+      }
+      if(ncplane_putwc_yx(n, 4, i, w) <= 0){
+        goto err;
+      }
+    }
+    for(int i = xl ; i <= xr ; ++i){
+      wchar_t w;
+      if(i % 2){
+        switch(flipmode % 4){
+          case 0: w = L'◴'; break;
+          case 1: w = L'◵'; break;
+          case 2: w = L'◶'; break;
+          case 3: w = L'◷'; break;
+          default: goto err;
+        }
+      }else{
+        switch(flipmode % 4){
+          case 0: w = L'◰'; break;
+          case 1: w = L'◳'; break;
+          case 2: w = L'◲'; break;
+          case 3: w = L'◱'; break;
+          default: goto err;
+        }
+      }
+      if(ncplane_putwc_yx(n, 5, i, w) <= 0){
+        goto err;
+      }
+    }
+    if(notcurses_render(nc)){
+      notcurses_stop(nc);
+      return EXIT_FAILURE;
+    }
+    nanosleep(&delay, NULL);
+    ++flipmode;
+  }
+  notcurses_stop(nc);
+  return EXIT_SUCCESS;
+
+err:
+  notcurses_stop(nc);
+  return EXIT_FAILURE;
+}