文章目录
圣诞将至—C实现语言圣诞树
圣诞树
源码
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <windows.h>
#include <time.h>
#define PI 3.14159265359
char love[20][43] = {
"111111111111111111111111111111111111111111",
"111111111111110000111111100001000111111111",
"110000000000000000011111100011000111111111",
"110000111001110001111111000110001111111111",
"111100010000110000111111100011000000000011",
"111100001000100011111110000100011111100011",
"100000000000000000001110000100011111000111",
"100000000000000000011100000000110001000111",
"100011100011111000110000000000110001111111",
"111011100011111100111111000111110001111111",
"111000000000000000111111000110000000001111",
"111111000111111111111111000110000000000111",
"111110001111111111111111000100010001000111",
"111000000000000001111111000000010001100011",
"111000000011000011111111000000110001100001",
"110001110000000111111111000001110001110111",
"100011111000011111111111000111110001111111",
"111110000000000000011111000111000001111111",
"111000000111110000011111000111000011111111",
"111111111111111111111111111111111111111111"
};
void gotoxy(int x, int y)
{
HANDLE hout = GetStdHandle(STD_OUTPUT_HANDLE);
COORD pos = {
x,y };
SetConsoleCursorPosition(hout, pos);
}
void SetColor(int color)
{
if (color == 0)color = 0x04;
HANDLE hCon = GetStdHandle(STD_OUTPUT_HANDLE);
SetConsoleTextAttribute(hCon, color);
}
void showsnow()
{
SetColor(rand() % 16);
int x = rand() % 120;
int y = rand() % 40;
gotoxy(x, y);
putchar('*');
}
float sx, sy;
float sdCircle(float px, float py, float r)
{
float dx = px - sx, dy = py - sy;
return sqrtf(dx * dx + dy * dy) - r;
}
float opUnion(float d1, float d2)
{
return d1 < d2 ? d1 : d2;
}
#define T px+scale*r*cosf(theta),py+scale*r*sin(theta)
int ribbon()
{
float x = (fmodf(sy, 0.1f) / 0.1f - 0.5f) * 0.5f;
return sx >= x - 0.05f && sx <= x + 0.05f;
}
float f(float px, float py, float theta, float scale, int n)
{
float d = 0.0f;
for (float r = 0.0f; r < 0.8f; r += 0.02f)
d = opUnion(d, sdCircle(T, 0.05f * scale * (0.95 - r)));
if (n > 0)
for (int t = -1; t <= 1; t += 2)
{
float tt = theta + t * 1.8f;
float ss = scale * 0.9f;
for (float r = 0.2f; r < 0.8f; r += 0.1f)
{
d = opUnion(d, f(T, tt, ss * 0.5f, n - 1));
ss *= 0.8f;
}
}
return d;
}
int main(int argc, char* argv[])
{
system("mode con cols=120 lines=42");
srand((int)time(NULL));
SetConsoleCP(437);
SetConsoleOutputCP(437);
int n = argc > 1 ? atoi(argv[1]) : 3;
float zoom = argc > 2 ? atof(argv[2]) : 1.0f;
for (sy = 0.8f; sy > 0.0f; sy -= 0.02f / zoom, putchar('\n'))
{
for (sx = -0.35f; sx < 0.35f; sx += 0.01f / zoom)
{
if (f(0, 0, PI * 0.5f, 1.0f, n) < 0.0f)
{
if (sy < 0.1f)
{
SetColor(rand() % 16);
putchar('\3');
}
else {
if (ribbon()) {
putchar('=');
}
else {
SetColor(rand() % 16);
putchar('\3');
}
}
}
else {
putchar(' ');
}
}
}
int i, j;
int x, y = 3;
for (i = 0; i < 19; i++, y++)
{
x = 60;
for (j = 0; j < 42; j++, x++)
{
gotoxy(x, y);
if (love[i][j] == '1')
{
putchar(' ');
}
else {
SetColor(0x06);
putchar('*');
}
}
}
for (n = 0; n++ < 365;)
{
showsnow();
}
gotoxy(0, 40);
getchar();
return 0;
}