C++ win32 绘制玫瑰花

/************************************************** * Function：玫瑰花 * Compiler：vs2010 * Developer：Zong Zhaopeng * Date: 5 26 2017 * Version: 1.0 * References:internet **************************************************/ #include <graphics.h> #include <conio.h> #include <math.h> // 定义全局变量 int rosesize = 500; int h = -250; // 定义点结构体 struct DOT { // (x,y,z) 坐标 double x; double y; double z; double red; // 红色 double green; // 绿色 // blue（蓝色)通过red计算 }; /************************************************** * Function：计算点 * Description：绘制玫瑰花：花柄、叶、花萼、花 * Call： * Call By： * Database： * param：a b c d * Return：bool **************************************************/ bool calc(double a,double b,double c,DOT &d) { double j, n, o, w, z; // 花柄 if(c > 60) { // 玫瑰花曲线 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.red = a * 1 - b / 2; d.green = a; return true; } double A = a * 2 - 1; double B = b * 2 - 1; if(A * A + B * B < 1) { // 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.red = 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.green = o / 1000 + 0.7 - o * w * 0.000003; return true; } // 花萼 4片 if(c > 32) { 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.red = (b * b * 0.3 + pow((1 - (A * A)), 7) * 0.15 + 0.3) * b; d.green = b * 0.7; return true; } // 花 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.red = (1 - b / 1.2) * 0.9 + a * 0.1; d.green = pow((1 - b), 20) / 4 + 0.05; return true; } return false; } // 主函数 int main() { // 定义变量 short *zBuffer; int x, y, z, zBufferIndex; // 结构变量 DOT dot; // 初始化 // 创建绘图窗口 initgraph(640, 480); // 设置背景色为白色 setbkcolor(WHITE); // 清屏 cleardevice(); // 初始化 z-buffer zBuffer = new short[rosesize * rosesize]; // 内存清零 memset(zBuffer, 0, sizeof(short) * rosesize * rosesize); // 按任意键退出 for(int j = 0; j < 2000 && !_kbhit(); j++) { for(int i = 0; i < 10000; i++) // 减少是否有按键的判断 { 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 // 取反 int red = ~int((dot.red * h)); if (red < 0) { red = 0; } if (red > 255) { red = 255; } int green = ~int((dot.green * h)); if (green < 0) { green = 0; } if (green > 255) { green = 255; } int blue = ~int((dot.red * dot.red * -80)); if (blue < 0) { blue = 0; } if (blue > 255) { blue = 255; } putpixel(x + 50, y - 20, RGB(red, green, blue)); } } } Sleep(1); } // 退出 delete []zBuffer; getch(); closegraph(); return 0; }