git.vdm.dev/octoleo

.gitignore

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+.idea
+cmake-build-debug

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.20)
+project(donut)
+
+set(CMAKE_CXX_STANDARD 17)
+
+add_executable(donut src/donut.cpp)
+
+# https://www.dropbox.com/s/79ga2m7p2bnj1ga/donut_deobfuscated.c?dl=0

README.md

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+# 3D Donut
+
+> Little C++ script to display a 3D Donut rotating in terminal.
+
+Copyright 2020 `<Lex Fridman>`
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files
+(the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

src/donut.cpp

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+/**
+ * Copyright 2020 <Lex Fridman>
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+ * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ **/
+
+#include <cmath>
+#include <cstdio>
+#include <cstring>
+#include <unistd.h>
+
+using namespace std;
+
+int main() {
+    float A = 0, B = 0;
+    float i, j;
+    int k;
+    float z[1790];
+    char b[1990];
+    printf("\x1b[2J");
+    for (;;) {
+        memset(b, 32, 1990);
+        memset(z, 0, 7040);
+        for (j = 0; j < 6.28; j += 0.07) {
+            for (i = 0; i < 6.28; i += 0.02) {
+                float c = sin(i);
+                float d = cos(j);
+                float e = sin(A);
+                float f = sin(j);
+                float g = cos(A);
+                float h = d + 2;
+                float D = 1 / (c * h * e + f * g + 5);
+                float l = cos(i);
+                float m = cos(B);
+                float n = sin(B);
+                float t = c * h * g - f * e;
+                int x = 40 + 30 * D * (l * h * m - t * n);
+                int y = 12 + 15 * D * (l * h * n + t * m);
+                int o = x + 80 * y;
+                int N = 8 * ((f * e - c * d * g) * m - c * d * e - f * g - l * d * n);
+                if (22 > y && y > 0 && x > 0 && 80 > x && D > z[o]) {
+                    z[o] = D;
+                    b[o] = ".,-~:;=!*#$@"[N > 0 ? N : 0];
+                }
+            }
+        }
+        printf("\x1b[H");
+        for (k = 0; k < 1991; k++) {
+            putchar(k % 80 ? b[k] : 10);
+            A += 0.00004;
+            B += 0.00002;
+        }
+        usleep(30000);
+    }
+    return 0;
+}