爱心代码——c++（借鉴b站up主）_c++爱心代码

#include<graphics.h>
#include<stdio.h>
#include<conio.h>
#include<math.h>
#include<stdlib.h>
 
 
//爱心点的结构体
struct Point {
	double x, y;//坐标
	COLORREF color;//颜色
};
//COLORREF colors[7] = { RGB(255,32,83),RGB(252,222,250),RGB(255,0,0),RGB(255,0,0),RGB(255,2,2),RGB(255,0,8),RGB(255,5,5) };
COLORREF colors[7] = { RGB(55,132,183),RGB(252,222,250),RGB(25,120,130),RGB(25,5,215),RGB(25,230,40),RGB(25,24,112),RGB(255,230,128) };
const int xScreen = 1200;//屏幕宽度
const int yScreen = 800;//屏幕高度
const double PI = 3.1415926;//圆周率
const double e = 2.71828;//自然数e
const double averag_distance = 0.162;//	弧度以0.01增长时，原始参数方程每个点的平均距离
const int quantity = 506;//所用点数
const int frames = 20;//爱心扩张的频率
const int circles = 210;//组成爱心的爱心个数
Point origin_points[quantity];//创建一个保存原始爱心数据的数组
Point points[circles * quantity];//创建一个保存所有爱心的数据数组
IMAGE images[frames];//创建图片数组
 
double screen_x(double x) {
	x += xScreen / 2;
	return x;
}//坐标转换为函数
double screen_y(double y) {
	y = -y + yScreen / 2;
	return y;
}//坐标转换为函数
int creat_random(int x1, int x2) {
	if (x2 > x1)
		return rand() % (x2 - x1 + 1) + x1;
}//创建x1-x2的随机数函数
void creat_date()
{
	int index = 0;
	double x1 = 0, y1 = 0, x2 = 0, y2 = 0;
	for (double radian = 0.1;radian <= 2 * PI;radian += 0.005)
	{
		x2 = 16 * pow(sin(radian), 3);
		y2 = 13 * cos(radian) - 5 * cos(2 * radian) - 2 * cos(3 * radian) - cos(4 * radian);
		double distance = sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2));
		if (distance > averag_distance) {
			x1 = x2, y1 = y2;
			origin_points[index].x = x2;
			origin_points[index++].y = y2;
 
		}
	}
	index = 0;
	for (double size = 0.1, lightness = 1.5;size <= 20;size += 0.1) {
		double success_p = 1 / (1 + pow(e, 8 - size / 2));
		if (lightness > 1) lightness -= 0.0025;
		for (int i = 0;i < quantity;i++) {
			if (success_p > creat_random(0, 100) / 100.0) {
				COLORREF color = colors[creat_random(0, 6)];
				points[index].color = RGB(GetRValue(color) / lightness, GetGValue(color) / lightness, GetBValue(color) / lightness);
				points[index].x = size * origin_points[i].x + creat_random(-4, 4);
				points[index++].y = size * origin_points[i].y + creat_random(-4, 4);
			}
		}
	}
	index = 0;
	for (double size = 0.1;size <= 20;size += 0.1) {
		double success_p = 1 / (1 + pow(e, 8 - size / 2));
		for (int i = 0;i < quantity;i++) {
			if (success_p > creat_random(0, 100) / 100.0) {
				points[index].color = colors[creat_random(0, 6)];
				points[index].x = size * origin_points[i].x + creat_random(-4, 4);
				points[index++].y = size * origin_points[i].y + creat_random(-4, 4);
			}
		}
	}
	int points_size = index;
	for (int frame = 0;frame < frames;frame++) {
		images[frame] = IMAGE(xScreen, yScreen);
		SetWorkingImage(&images[frame]);
		for (index = 0;index < points_size;index++)
		{
			double x = points[index].x, y = points[index].y;
			double distance = sqrt(pow(x, 2) + pow(y, 2));
			double distance_increase = -0.0009 * distance * distance + 0.35714 * distance + 5;
			double x_increase = distance_increase * x / distance / frames;
			double y_increase = distance_increase * y / distance / frames;
 
 
			points[index].x += x_increase;
			points[index].y += y_increase;
			setfillcolor(points[index].color);
			solidcircle(screen_x(points[index].x), screen_y(points[index].y), 1);
		}
 
		for (double size = 17;size < 23;size += 0.3) {
			for (index = 0;index < quantity;index++) {
				if ((creat_random(0, 100) / 100.0 > 0.6 && size >= 20) || (size < 20 && creat_random(0, 100) / 100.0>0.95))
				{
					double x, y;
					if (size >= 20) {
						x = origin_points[index].x * size + creat_random(-frame * frame / 5 - 15, frame * frame / 5 + 15);
						y = origin_points[index].y * size + creat_random(-frame * frame / 5 - 15, frame * frame / 5 + 15);
					}
					else {
						x = origin_points[index].x * size + creat_random(-5, 5);
						y = origin_points[index].x * size + creat_random(-5, 5);
					}
					setfillcolor(colors[creat_random(0, 6)]);
					solidcircle(screen_x(x), screen_y(y), 1);
				}
 
			}
 
		}
 
 
	}
}
 
 
 
 
 
int main() {
	initgraph(xScreen, yScreen);
	BeginBatchDraw();
	/*srand(time(0));*/
	creat_date();
	SetWorkingImage();
	bool extend =true, shrink = false;
	for (int frame = 0;!_kbhit();) {
		putimage(0, 0, &images[frame]);
		FlushBatchDraw();
		Sleep(20);
		cleardevice();
		if (extend)
			frame == 19 ? (shrink =true, extend = false) : ++frame;
		else
			frame == 0 ? (shrink = false, extend = true) : --frame;
	}
	BeginBatchDraw();
	closegraph();
	return 0;
 
}
 
 

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