simulation done

src/base.h

@@ -33,8 +33,10 @@ typedef double f64;
 #define HEIGHT 600
 
 // Simulation constants
-#define SIZEOF_PROGRAM 64
-#define NUM_PROGRAMS   64
+#define SIZEOF_PROGRAM_POW_2 8
+#define SIZEOF_PROGRAM       (1 << SIZEOF_PROGRAM_POW_2)
+#define NUM_PROGRAMS_POW_2   8
+#define NUM_PROGRAMS         (1 << NUM_PROGRAMS_POW_2)
 
 #endif
 

src/main.c

@@ -15,17 +15,30 @@
 #include "vec.h"
 
 #include "bf.h"
+#include "simulation.h"
+
+void simulation_soup(simulation_t *sim)
+{
+  for (size_t i = 0; i < sizeof(sim->memory); ++i)
+  {
+    sim->memory[i] = (rand() % 82) + 43;
+  }
+}
 
 int main(void)
 {
+  simulation_t sim = {0};
+  simulation_soup(&sim);
   srand(time(NULL));
 
   InitWindow(WIDTH, HEIGHT, "CompLife");
   SetTargetFPS(60);
   for (size_t ticks = 0; !WindowShouldClose(); ++ticks)
   {
+    simulation_iterate(&sim);
     BeginDrawing();
     ClearBackground(BLACK);
+    simulation_draw(&sim);
     EndDrawing();
   }
   CloseWindow();

src/simulation.c

@@ -4,6 +4,7 @@
  * License: See end of file
  */
 
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -14,41 +15,33 @@
 static char *VALID_OPS = "<>{}-+.,[]";
 
 static const Color possible_colors[] = {
-    {0xb4, 0x60, 0x5f, 0xff}, {0xe, 0x7, 0x7, 0xff},
-    {0x2c, 0x10, 0x10, 0xff}, {0x28, 0x21, 0x21, 0xff},
-    {0xbc, 0x71, 0x70, 0xff}, {0x4a, 0x31, 0x31, 0xff},
-    {0xc2, 0x68, 0x67, 0xff}, {0x7e, 0x40, 0x3f, 0xff},
-    {0x21, 0x9, 0x8, 0xff},   {0xcf, 0x35, 0x34, 0xff},
-    {0x0, 0x0, 0x0, 0xff},    {0},
+    ['<'] = {0x2f, 0x4f, 0x4f, 0xff}, ['>'] = {0x22, 0x8b, 0x22, 0xff},
+    ['{'] = {0xb0, 0x30, 0x60, 0xff}, ['}'] = {0xff, 0x00, 0x00, 0xff},
+    ['-'] = {0xff, 0xff, 0x00, 0xff}, ['+'] = {0x00, 0xff, 0x00, 0xff},
+    ['.'] = {0x00, 0xff, 0xff, 0xff}, [','] = {0xa0, 0x20, 0xf0, 0xff},
+    ['['] = {0x1e, 0x90, 0xff, 0xff}, [']'] = {0xff, 0xde, 0xad, 0xff},
+    ['\0'] = {0x0, 0x0, 0x0, 0xff},
 };
 
-void simulation_pick(u64 *a, u64 *b)
-{
-  // Pick two indices that don't intersect
-  while (*a == *b)
-  {
-    *a = rand() % NUM_PROGRAMS;
-    *b = rand() % NUM_PROGRAMS;
-  }
-}
-
 void simulation_iterate(simulation_t *sim)
 {
-  u64 a = 0, b = 0;
-  simulation_pick(&a, &b);
-
-  // Change of basis from program indices to bf_token indices.
-  a *= SIZEOF_PROGRAM;
-  b *= SIZEOF_PROGRAM;
+  sim->a = 0;
+  sim->b = 0;
+  while (sim->a == sim->b)
+  {
+    sim->a = rand() % NUM_PROGRAMS;
+    sim->b = rand() % NUM_PROGRAMS;
+  }
 
   // Perform the catalytic reaction
   struct ProgramConcat a_b_concat = {0};
-  program_concat(&a_b_concat, sim->memory + a, sim->memory + b);
+  program_concat(&a_b_concat, sim->memory + (sim->a * SIZEOF_PROGRAM),
+                 sim->memory + (sim->b * SIZEOF_PROGRAM));
   program_execute(&a_b_concat);
   program_split(&a_b_concat);
 }
 
-u8 get_op(const u8 cell)
+bf_token get_op(const bf_token cell)
 {
   if (strchr(VALID_OPS, cell))
     return cell;
@@ -56,14 +49,50 @@ u8 get_op(const u8 cell)
     return '\0';
 }
 
-Color simulation_cell_color(const u8 cell)
+Color simulation_cell_color(const bf_token cell)
 {
   return possible_colors[get_op(cell)];
 }
 
 void simulation_draw(simulation_t *sim)
 {
-  assert(0 && "TODO: implement simulation_draw");
+  auto const PROGRAM_ROW    = (1 << (SIZEOF_PROGRAM_POW_2 / 2));
+  auto const SIMULATION_ROW = (1 << (NUM_PROGRAMS_POW_2 / 2));
+  auto const CELL_WIDTH     = WIDTH / ((f64)(PROGRAM_ROW * SIMULATION_ROW));
+  auto const CELL_HEIGHT    = HEIGHT / ((f64)(PROGRAM_ROW * SIMULATION_ROW));
+
+  for (size_t i = 0; i < NUM_PROGRAMS; ++i)
+  {
+    auto s_x = (i / SIMULATION_ROW) * PROGRAM_ROW;
+    auto s_y = (i % SIMULATION_ROW) * PROGRAM_ROW;
+    // printf("%lu => (%lu, %lu)\n", i, s_x, s_y);
+
+    const bf_token *base = sim->memory + (i * SIZEOF_PROGRAM);
+
+    for (u64 j = 0; j < SIZEOF_PROGRAM; ++j)
+    {
+      auto p_x = j / PROGRAM_ROW;
+      auto p_y = j % PROGRAM_ROW;
+      p_x += s_x;
+      p_y += s_y;
+
+      // printf("\t%lu => (%lu, %lu)\n", j, p_x, p_y);
+
+      auto color = simulation_cell_color(base[j]);
+
+      DrawRectangleV((Vector2){CELL_WIDTH * p_x, CELL_HEIGHT * p_y},
+                     (Vector2){CELL_WIDTH, CELL_HEIGHT}, color);
+    }
+
+    if (sim->a == i || sim->b == i)
+    {
+      DrawRectangleLinesEx((Rectangle){.x      = s_x * CELL_WIDTH,
+                                       .y      = s_y * CELL_HEIGHT,
+                                       .width  = PROGRAM_ROW * CELL_WIDTH,
+                                       .height = PROGRAM_ROW * CELL_HEIGHT},
+                           1, BLUE);
+    }
+  }
 }
 
 /* Copyright (C) 2026 Aryadev Chavali

src/simulation.h

@@ -9,9 +9,12 @@
 
 #include "bf.h"
 
+#define SIMULATION_SIZE (NUM_PROGRAMS * SIZEOF_PROGRAM)
+
 typedef struct
 {
-  bf_token memory[NUM_PROGRAMS * SIZEOF_PROGRAM];
+  u64 a, b;
+  bf_token memory[SIMULATION_SIZE];
 } simulation_t;
 
 void simulation_iterate(simulation_t *sim);
@@ -22,12 +25,14 @@ void simulation_draw(simulation_t *sim);
 /* Copyright (C) 2026 Aryadev Chavali
 
  * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS
  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License Version 2 for
  * details.
 
  * You may distribute and modify this code under the terms of the GNU General
- * Public License Version 2, which you should have received a copy of along with
+ * Public License Version 2, which you should have received a copy of along
+ with
  * this program.  If not, please go to <https://www.gnu.org/licenses/>.
 
  */