C++绘制玫瑰花

源码

#include <stdio.h>
#include <windows.h>
#include <math.h>
#include <graphics.h>
#include <mmsystem.h>
#pragma comment(lib,"winmm.lib")

//定义全局变量
int rosesize = 500;
int h = -250;

//定义结构体
struct DOT {
    double x;
    double y;
    double z;
    double r;
    double g;
};

bool calc(double a, double b, double c, DOT& d) 
{
    double j, n, o, w, z;

    if (c > 60) 
    {
        // 花柄
        d.x = sin(a * 7) * (13 + 5 / (0.2 + pow(b * 4, 4))) - sin(b) * 50;
        d.y = b * rosesize + 50;
        d.z = 625 + cos(a * 7) * (13 + 5 / (0.2 + pow(b * 4, 4))) + b * 400;
        d.r = a * 1 - b / 2;
        d.g = a;
        return true;
    }
    double A = a * 2 - 1;
    double B = b * 2 - 1;
    if (A * A + B * B < 1) 
    {
        // 绿叶
        if (c > 37) {
            j = (int(c) & 1);
            n = j ? 6 : 4;
            o = 0.5 / (a + 0.01) + cos(b * 125) * 3 - a * 300;
            w = b * h;
            d.x = o * cos(n) + w * sin(n) + j * 610 - 390;
            d.y = o * sin(n) - w * cos(n) + 550 - j * 350;
            d.z = 1180 + cos(B + A) * 99 - j * 300;
            d.r = 0.4 - a * 0.1 + pow(1 - B * B, -h * 6) * 0.15 - a * b * 0.4 + cos(a + b) / 5 +
                pow(cos((o * (a + 1) + (B > 0 ? w : -w)) / 25), 30) * 0.1 * (1 - B * B);
            d.g = o / 1000 + 0.7 - o * w * 0.000003;
            return true;
        }

        if (c > 32) 
        { 
            // 花萼
            c = c * 1.16 - 0.15;
            o = a * 45 - 20;
            w = b * b * h;
            z = o * sin(c) + w * cos(c) + 620;
            d.x = o * cos(c) - w * sin(c);
            d.y = 28 + cos(B * 0.5) * 99 - b * b * b * 60 - z / 2 - h;
            d.z = z;
            d.r = (b * b * 0.3 + pow((1 - (A * A)), 7) * 0.15 + 0.3) * b;
            d.g = b * 0.7;
            return true;
        }
        // 花朵
        o = A * (2 - b) * (80 - c * 2);
        w = 99 - cos(A) * 120 - cos(b) * (-h - c * 4.9) + cos(pow(1 - b, 7)) * 50 + c * 2;
        z = o * sin(c) + w * cos(c) + 700;
        d.x = o * cos(c) - w * sin(c);
        d.y = B * 99 - cos(pow(b, 7)) * 50 - c / 3 - z / 1.35 + 450;
        d.z = z;
        d.r = (1 - b / 1.2) * 0.9 + a * 0.1;
        d.g = pow((1 - b), 20) / 4 + 0.05;
        return true;
    }

    return false;
}

int main()
{
    short *zBuffer;
    int x, y, z, zBufferIndex;
    DOT dot;
    initgraph(640, 480);//创建绘图窗口

    /*添加音乐*/
    //mciSendString("open BadApple.mp3 alias BadApple", NULL, 0, NULL);
    //mciSendString("play BAdApple", NULL, 0, NULL);

    setbkcolor(BLACK);
    cleardevice();

    zBuffer = new short[rosesize * rosesize];
    memset(zBuffer, 0, sizeof(short) * rosesize * rosesize);
    for (int j = 0; j < 2000; j++)
    {
        for (int i = 0; i < 10000; i++)
        {
            if (calc(double(rand()) / RAND_MAX, double(rand()) / RAND_MAX, rand() % 46 / 0.74, dot))
            {
                z = int(dot.z + 0.5);
                x = int(dot.x * rosesize / z - h + 0.5);
                y = int(dot.y * rosesize / z - h + 0.5);
                if (y > rosesize) continue;
                zBufferIndex = y * rosesize + x;
                if (!zBuffer[zBufferIndex] || zBuffer[zBufferIndex] > z)
                {
                    zBuffer[zBufferIndex] = z;
                    // 画点
                    int r = ~int((dot.r * h));
          
                    if (r < 0) r = 0;
                    
                    if (r > 255) r = 255;

                    int g = ~int((dot.g * h));
                    if (g < 0) g = 0;
                    if (g > 255) g = 255;

                    int b = ~int((dot.r * dot.r * -80));
                    if (b < 0) b = 0;

                    if (b > 255) b = 255;

                    putpixel(x + 50, y - 20, RGB(r, g, b));
                }
            }
        }
        Sleep(100);
    }
    delete[]zBuffer;
    getchar();
    closegraph();
    return 0;
}

效果