some new stuff.

idk its all pretty fun! some C++ too!

simulations/donut.c/donut.cpp

@@ -0,0 +1,57 @@
+#include <windows.h>
+#include <cstdio>
+#include <cstring>
+#include <cmath>
+
+int main() {
+    float A = 0, B = 0;
+    float i, j;
+    int k;
+    float z[1760];
+    char b[1760];
+
+    // Clear screen
+    std::printf("\x1b[2J");
+
+    for (;;) {
+        std::memset(b, 32, 1760);  // fill with spaces
+        std::memset(z, 0, 1760 * sizeof(float));
+
+        for (j = 0; j < 6.28; j += 0.07) {
+            for (i = 0; i < 6.28; i += 0.02) {
+                float c = std::sin(i);
+                float d = std::cos(j);
+                float e = std::sin(A);
+                float f = std::sin(j);
+                float g = std::cos(A);
+                float h = d + 2;
+                float D = 1 / (c * h * e + f * g + 5);
+                float l = std::cos(i);
+                float m = std::cos(B);
+                float n = std::sin(B);
+                float t = c * h * g - f * e;
+                int x = int(40 + 30 * D * (l * h * m - t * n));
+                int y = int(12 + 15 * D * (l * h * n + t * m));
+                int o = x + 80 * y;
+                int N = int(8 * ((f * e - c * d * g) * m - c * d * e - f * g - l * d * n));
+
+                if (y >= 0 && y < 22 && x >= 0 && x < 80 && D > z[o]) {
+                    z[o] = D;
+                    b[o] = ".,-~:;=!*#$@"[N > 0 ? N : 0];
+                }
+            }
+        }
+
+        std::printf("\x1b[H");
+        for (k = 0; k < 1761; k++) {
+            putchar(k % 80 ? b[k] : 10);
+        }
+
+        A += 0.04f;
+        B += 0.02f;
+
+        Sleep(10);  // milliseconds
+    }
+
+    return 0;
+}