爱心代码 C++

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因本代码为c++，所以需要下载c++的一个小软件（easyx）

下载视频的教程的链接：link

#define  _CRT_SECURE_NO_WARNINGS
#include<graphics.h>
#include <conio.h>
#include<time.h>
#include<math.h>
#include<stdlib.h>

struct Point {
    double x, y;
    COLORREF color;
};

COLORREF colors[256] = { 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) };
const int xScreen = 1200;
const int yScreen = 800;
const double PI = 3.1426535159;
const double e = 2.71828;
const double averag_distance = 0.162;
const int quantity = 506;
const int circles = 210;
const int frames = 20;
Point  origin_points[quantity];
Point  points[circles * quantity];
IMAGE images[frames];

double screen_x(double x)
{
    x += xScreen / 2;
    return x;
}

double screen_y(double y)
{
    y = -y + yScreen / 2;
    return y;
}

int creat_random(int x1, int x2)
{
    if (x2 > x1)
        return  rand() % (x2 - x1 + 1) + x1;
}

void creat_data()
{
    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);
            }
        }
    }

    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 diatance_increase = -0.0009 * distance * distance
                + 0.35714 * distance + 5;
            double x_increase = diatance_increase * x / distance / frames;
            double y_increase = diatance_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].y * size + creat_random(-5, 5);
                    }

                    setfillcolor(colors[creat_random(0, 6)]);
                    solidcircle(screen_x(x), screen_y(y), 1);
                }
            }
        }
    }
    SetWorkingImage();
}

int main()
{
    initgraph(xScreen, yScreen);
    BeginBatchDraw();
    srand(time(0));
    creat_data();

    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;
    }
    EndBatchDraw();
    closegraph();
    return 0;
}

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