今天使用C语言调用EasyX图形库绘制一只小兔子。
难点在于这个小兔子背景的五角红旗，用五星国旗为背景，这里肯定不能弄错了。
中华人民共和国国旗法：中华人民共和国国旗是五星红旗。中华人民共和国国旗是中华人民共和国的象征和标志。每个公民和组织，都应当尊重和爱护国旗。
先展示一下效果：
源码：
/////////////////////////////////////////////////// 程序名称：绘制小兔子// 编译环境：Mictosoft Visual Studio 2013, EasyX_20200315(beta)// 作 者：luoyh <2864292458@qq.com><vx:luoyh1207>// 最后修改：2023-9-6double th = PI / 180;struct star_p // 五角星的结构体{int x; // x 位置int y; // y 位置int r; // 半径double angle; // 旋转角度};void DrawStar(star_p star); // 绘制五角星double GetAngle(int x1, int y1, int x2, int y2); // 计算方位角// 绘制背景void DrawBK(); // 绘制背景void DrawYZ(); // 绘制影子void DarwEDMZED(); // 绘制耳朵帽子耳朵void DarwSZ(); // 绘制身子void DrawTOU(); // 绘制头void DrawXJ(); // 添加一点细节// 一些可以重复调用的图形void DrawEllipse(int x0, int y0, int a, int b, int k, COLORREF color); // 绘制倾斜椭圆int main(){initgraph(WIDTH, HEIGHT);DrawBK(); // 绘制背景DrawYZ(); // 绘制影子DarwEDMZED();DarwSZ();DrawTOU();DrawXJ();_getch();return 0;}void DrawBK() // 绘制背景{setbkcolor(RGB(254, 5, 1));cleardevice();star_p Star[5];Star[0].x = 5 * CELL;Star[0].y = 5 * CELL;Star[0].r = 3 * CELL;Star[1].x = 10 * CELL;Star[1].y = 2 * CELL;Star[1].r = 1 * CELL;Star[2].x = 12 * CELL;Star[2].y = 4 * CELL;Star[2].r = 1 * CELL;Star[3].x = 12 * CELL;Star[3].y = 7 * CELL;Star[3].r = 1 * CELL;Star[4].x = 10 * CELL;Star[4].y = 9 * CELL;Star[4].r = 1 * CELL;for (int i = 0; i < 5; i++){Star[i].angle = GetAngle(Star[0].x, Star[0].y, Star[i].x, Star[i].y);DrawStar(Star[i]);}}void DrawYZ() // 绘制影子{setfillcolor(BLACK);solidellipse(209,630,470,690);}void DarwEDMZED() // 绘制耳朵帽子耳朵{// 右耳朵setlinecolor(BLACK);setlinestyle(PS_SOLID,2);DrawEllipse(200, 318, 80, 40, 70, BLACK);setfillcolor(RGB(247,247,247));floodfill(200,318,BLACK);DrawEllipse(200, 318, 40, 20, 70, RGB(246, 167, 173));setfillcolor(RGB(246, 167, 173));floodfill(200, 318, RGB(246, 167, 173));// 绘制帽子setfillcolor(RGB(88,132,56));setlinecolor(BLACK);fillcircle(269,372,77);// 画五角星star_p Mstar;Mstar.x = 264;Mstar.y = 315;Mstar.r = 18;Mstar.angle = 1.029;DrawStar(Mstar);setfillcolor(RGB(255, 48, 17));floodfill(264, 317, RGB(88, 132, 56));setfillcolor(RGB(88, 132, 56));setlinecolor(BLACK);fillellipse(175,315,309,388);// 左耳朵DrawEllipse(348, 383, 105, 50, 40, RGB(0,1,0));setfillcolor(RGB(247, 247, 247));floodfill(348, 383, RGB(0, 1, 0));DrawEllipse(348, 380, 55, 25, 40, RGB(246, 167, 173));setfillcolor(RGB(246, 167, 173));floodfill(348, 383, RGB(246, 167, 173));/*fillcircle()*/}void DarwSZ() // 绘制身子{setlinecolor(RGB(0,1,0));setfillcolor(RGB(247,247,247));fillellipse(250, 678, 323, 727);fillcircle(200,663,89);setlinecolor(RGB(0, 1, 0));line(259,625,267,724);setlinecolor(RGB(0, 1, 0));line(159,603,127,671);star_p Mstar;Mstar.x = 180;Mstar.y = 658;Mstar.r = 40;Mstar.angle = -1.40;DrawStar(Mstar);setfillcolor(RGB(255,48,17));floodfill(181, 658, RGB(247, 247, 247));setlinecolor(RGB(0, 1, 0));setfillcolor(RGB(247, 247, 247));fillcircle(123, 708, 45);fillcircle(196, 712, 48);setlinecolor(RGB(247,247,247));setlinestyle(PS_SOLID, 4);arc(148, 664, 244, 760, 5.829, 0.47);arc(200 - 89, 663 - 89, 289, 663 + 89, 5.584, 6.069);}void DrawTOU() // 绘制头{setlinestyle(PS_SOLID, 2);setlinecolor(RGB(0,2,1));setfillcolor(RGB(247,247,247));fillellipse(63, 334, 380, 596);setlinecolor(RGB(247, 247, 247));setlinestyle(PS_SOLID, 4);arc(63, 334, 380, 596, 4.35, 4.90);}void DrawXJ() // 添加一点细节{// 化眼睛DrawEllipse(149,380,24,14,50,BLACK);setfillcolor(BLACK);floodfill(149, 380, BLACK);DrawEllipse(283,396,23,15,55,BLACK);setfillcolor(BLACK);floodfill(283, 396, BLACK);DrawEllipse(150, 369, 10, 4, 40, WHITE);setfillcolor(WHITE);floodfill(150, 369,WHITE);DrawEllipse(278, 390, 10, 4, 43, WHITE);setfillcolor(WHITE);floodfill(278, 390, WHITE);setlinecolor(BLACK);setlinestyle(PS_SOLID, 2);arc(168,421,208,460,0.697,2.87);}void DrawEllipse(int x0, int y0, int a, int b, int k, COLORREF color){double i;double x, y, tx, ty;for (i = -180; i <= 180; i = i + 0.5){x = a * cos(i * th);y = b * sin(i * th);tx = x;ty = y;x = tx * cos(k * th) - ty * sin(k * th) + x0;y = y0 - (ty * cos(k * th) + tx * sin(k * th));setfillcolor(color);solidcircle((int)x, (int)y, 1);}}void DrawStar(star_p star){POINT pts[5];star.angle = 2 * PI - star.angle;for (int i = 0; i < 5; i++){pts[i].x = int(star.x + cos(star.angle) * star.r);pts[i].y = int(star.y - sin(star.angle) * star.r);star.angle += PI * 4 / 5;}setpolyfillmode(WINDING);setfillcolor(YELLOW);setlinecolor(YELLOW);solidpolygon(pts, 5);}double GetAngle(int x1, int y1, int x2, int y2){double DX = (x1 - x2) * 1.0;double DY = (y1 - y2) * 1.0;double aAB = atan((fabs)(DY) / (fabs)(DX));if (DX > 0 && DY >= 0){return aAB;}if (DX < 0 && DY >= 0){return PI - aAB;}if (DX < 0 && DY < 0){return PI + aAB;}if (DX > 0 && DY < 0){return PI * 2 - aAB;}if (DX == 0 && DY > 0){return PI / 2;}if (DX == 0 && DY <= 0){return PI / 2 * 3;}return 0;}
