From 4803250c4fb17bdfa7964d2b88a4f1e6356c2d99 Mon Sep 17 00:00:00 2001
From: Llewellyn van der Merwe <llewellyn@vdm.io>
Date: Sun, 7 Jun 2020 09:18:24 +0200
Subject: [PATCH] git.vdm.dev/octoleo

---
 .gitignore     |  2 ++
 CMakeLists.txt |  8 ++++++
 README.md      | 18 ++++++++++++++
 src/donut.cpp  | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 94 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 CMakeLists.txt
 create mode 100644 README.md
 create mode 100644 src/donut.cpp

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8b1aab2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.idea
+cmake-build-debug
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..5431026
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,8 @@
+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
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..fbb3865
--- /dev/null
+++ b/README.md
@@ -0,0 +1,18 @@
+# 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.
diff --git a/src/donut.cpp b/src/donut.cpp
new file mode 100644
index 0000000..8d2dc7e
--- /dev/null
+++ b/src/donut.cpp
@@ -0,0 +1,66 @@
+/**
+ * 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;
+}