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html+css+js
repo：/anvaka/atree
The tree is built of two spirals. These 11 lines of code render one line on spiral. It includes 3d projection and background shadow. Almost the same as this wiki image:
·
充分诠释数学的简洁之美。
repo：/hakimel/DOM-Tree
C++
编译命令
g++-9 -O2 tree.cpp -std=c++17 -pthread && ./a.out xtree.txt# g++-7已经启用，改为g++-9sudo apt-get install g++-9
// Copyright (c) Antony Polukhin.//// Distributed under the Boost Software License, Version 1.0. (See// accompanying file LICENSE_1_0.txt or copy at// /LICENSE_1_0.txt)// TODO:// * clean up the mess in code// * clean up after the cleanup// * add falling snow or glowing stars// * more modes for lamps#include <cstdlib>#include <chrono>#include <thread>#include <iostream>#include <random>#include <iterator>#include <fstream>#include <algorithm>#include <atomic>enum class color_t : unsigned char {};constexpr color_t operator"" _c(unsigned long long int v) {return color_t(v); }std::ostream& operator<< (std::ostream& os, color_t val) {return os << "\033[38;5;" << static_cast<int>(val) << 'm';}struct green_state {color_t color() const {return *(std::min(std::begin(kGreenColors) + dark, std::end(kGreenColors) - 1));}void increase_darkness() {++dark; }void reset_darkness() {dark = 0; }private:constexpr static color_t kGreenColors[] = {22_c, 22_c, 28_c, 28_c, 34_c };int dark = 0;};struct lamps {void operator()(char c) {if (mode % max_state == 0)new_color();std::cout << col << c;}void end_cycle() {if (mode % max_state == 1) {new_color();} else if (mode % max_state == 2) {auto i = static_cast<int>(col);++i;i %= 226;i = std::clamp(i, 154, 226);//i %= 202;//i = std::clamp(i, 196, 202);col = static_cast<color_t>(i);}}void change_mode() {++mode;}void stop() {stopped = true;}bool was_stopped() {return stopped;}private:void new_color() {std::sample(std::begin(kPrettyColors), std::end(kPrettyColors), &col, 1, rand);}std::atomic<bool> stopped = false;std::atomic<size_t> mode{0};static constexpr size_t max_state = 3;std::mt19937 rand{std::random_device{}()};color_t col = 0_c;// /bash/tip_colors_and_formattingstatic constexpr color_t kPrettyColors[] = {1_c, 9_c, 11_c, 15_c, 45_c, 87_c, 118_c, 154_c, 155_c, 165_c, 193_c, 196_c, 198_c,208_c, 226_c, 15_c};};std::string get_tree(int args, const char** argv) {std::string filename = "xtree.txt";if (args > 1) {filename = argv[1];}std::string tree;std::ifstream ifs{filename.c_str()};std::getline(ifs, tree, '\0');return tree;}int main(int args, const char** argv) {using namespace std::literals::chrono_literals;auto tree = get_tree(args, argv);lamps lamp;std::thread t([&lamp]() {char c;while (std::cin >> c) {if (c == 'q') {lamp.stop();break;}lamp.change_mode();}});for (;;) {if (lamp.was_stopped()) {break;}std::system("clear");green_state g;auto it = tree.begin();auto end = tree.end();auto prev_width = 0;for (; it != end; ++it) {const auto c = *it;switch (c) {case '*': [[fall_through]]case ' ':std::cout << g.color() << c;break;case 'o': [[fall_through]]case 'O':lamp(c);break;case '#':std::cout << 94_c << c;break;case '\n': {const auto next_new_line = std::find(it + 1, end, '\n');const auto new_width = std::count_if(it,next_new_line,[](char s) {return s == '*' || s == 'o' || s == 'O'; });if (prev_width < new_width) {g.increase_darkness();} else {g.reset_darkness();}prev_width = new_width;}[[fall_through]]default:std::cout << 0_c << c;}}std::cout << 0_c << std::endl;lamp.end_cycle();std::this_thread::sleep_for(400ms);}t.join();}
python
在终端运行：
python terminal_tree.py
import argparseimport osimport randomimport timeBALL = '⏺'COLOR = {'blue': '\033[94m','yellow': '\033[93m','cyan': '\033[96m','green': '\033[92m','magenta': '\033[95m','white': '\033[97m','red': '\033[91m'}STAR = '★'def random_change_char(string, value):indexes = random.sample(range(0, len(string)), value)string = list(string)for idx in indexes:if string[idx] != ' ' and string[idx] == '_':string[idx] = BALLreturn ''.join(string)def tree(height=13, screen_width=80):star = (STAR, 3*STAR)if height % 2 != 0:height += 1body = ['/_\\', '/_\_\\']trunk = '[___]'begin = '/'end = '\\'pattern = '_/'j = 5for i in range(7, height + 1, 2):middle = pattern + (i - j) * patternline = ''.join([begin, middle[:-1], end])body.append(line)middle = middle.replace('/', '\\')line = ''.join([begin, middle[:-1], end])body.append(line)j += 1return [line.center(screen_width) for line in (*star, *body, trunk)]def balls(tree):for idx, _ in enumerate(tree[:-3], 2):tree[idx] = random_change_char(tree[idx], len(tree[idx])//8)return treedef colored_stars_balls(tree):for idx, _ in enumerate(tree):string = list(tree[idx])for pos, _ in enumerate(string):if string[pos] == STAR:string[pos] = ''.join([COLOR['yellow'], STAR, '\033[0m'])elif string[pos] == BALL:string[pos] = ''.join([random.choice(list(COLOR.values())), BALL, '\033[0m'])tree[idx] = ''.join(string)return treedef cli():parser = argparse.ArgumentParser(prog="Python Christmas Tree by Chico Lucio from Ciencia Programada",epilog="Ctrl-C interrupts the Christmas :-(")parser.add_argument('-s', '--size', default=13, type=int,help="Tree height. If even it will be subtracted 1. If less than 7, considered 5. Default: 13")parser.add_argument('-w', '--width', default=80, type=int,help="Screen width. Used to center the tree. Default: 80")parser.add_argument('-t', '--terminal', action='store_true',help="Uses the terminal size to center the tree. -s and -w will be ignored")args = parser.parse_args()if args.terminal:screen_width, height = os.get_terminal_size()height -= 2else:height = args.sizescreen_width = args.widthwhile True:try:time.sleep(random.uniform(.1, 1))os.system('cls' if os.name == 'nt' else 'clear')print('\n'.join(colored_stars_balls(balls(tree(height, screen_width)))))except KeyboardInterrupt:os.system('cls' if os.name == 'nt' else 'clear')print(f"\n{'Merry Christmas!!':^{screen_width}}", end='\n\n')breakif __name__ == '__main__':cli()
