a

sim/exportHelper.cu

@@ -56,8 +56,18 @@ void exportHelper::imageWriter(size_t idx, thread* thread) {
     auto* particles_copy = (Particle*)malloc(this->particles->size());
     this->particles->sync_to(&particles_copy);
 
+    char data[32 * 5 + 1];
+    data[32*5] = '\0';
+
     for (size_t i = 0; i < particle_count; i++) {
-        fprintf(f, "%f %f %f %f %f\n", particles_copy[i].position.x, particles_copy[i].position.y, particles_copy[i].velocity.x, particles_copy[i].velocity.y, particles_copy[i].mass);
+	memcpy(data, &particles_copy[i].position.x, sizeof(float));
+        memcpy(&data[32], &particles_copy[i].position.y, sizeof(float));
+        memcpy(&data[64], &particles_copy[i].velocity.x, sizeof(float));
+        memcpy(&data[96], &particles_copy[i].velocity.y, sizeof(float));
+        memcpy(&data[128], &particles_copy[i].mass, sizeof(float));
+
+
+        fprintf(f, "%s\n", particles_copy[i].position.x, particles_copy[i].position.y, particles_copy[i].velocity.x, particles_copy[i].velocity.y, particles_copy[i].mass);
     }
 
     free(particles_copy);
@@ -91,4 +101,4 @@ void exportHelper::epoch() {
         }
     }
 
-}
+}

viewer/main.cpp

@@ -104,6 +104,9 @@ int main() {
                         } else {
                             max_dim -= 0.1;
                         }
+
+			max_dim = std::abs(max_dim);
+
                         update_required = true;
                         break;
 
@@ -146,9 +149,6 @@ int main() {
         }
 
         if (update_required) {
-            SDL_FillRect(surf, nullptr, SDL_MapRGB(surf->format, 0, 0, 0));
-            particles.clear();
-
             char filename[256];
             sprintf(filename, "./output/%zu.dat", current_idx);
 
@@ -158,7 +158,11 @@ int main() {
                 printf("File not found: %s\n", filename);
                 printf("End of simulation\n");
                 pause = true;
+
             } else {
+		SDL_FillRect(surf, nullptr, SDL_MapRGB(surf->format, 0, 0, 0));
+
+		particles.clear();
 
                 char *cur_line = (char *)malloc(64 * sizeof(char));
                 size_t len = 64;
@@ -168,11 +172,11 @@ int main() {
                         break;
                     }
 
-                    float x, y, vx, vy, m;
-
-                    if (sscanf(cur_line, "%f %f %f %f %f", &x, &y, &vx, &vy, &m) != 5) {
-                        break;
-                    }
+                    float x = *(float*)cur_line;
+		    float y = *(float*)cur_line[32];
+                    float vx = *(float*)cur_line[64];
+                    float vy = *(float*)cur_line[96];
+		    float m = *(float*)cur_line[128];
 
                     particles.push_back(Particle{m, {x, y}, {vx, vy}});
                 }
@@ -210,4 +214,4 @@ int main() {
     }
 
     return 0;
-}
+}