计算机图形学-画椭圆和圆

姓名XXX学号XXX实验组实验时间10-24指导老师成绩实验项目名称圆，椭圆中点算法实验要求优化后的算法：二次差分法可任意指定圆心坐标实验目的实验环境VS 2025实验内容圆：void Bresenham_Circle(int xc, int yc, int r) {int x, y, d;x = 0;y = r;d = 3 - 2 * r;glVertex2i(x + xc, y + yc);while (x < y){if (d < 0)(d=d+4*x+6;}else(d = d + 4 * (x - y) +10;y—;计算机图形学.画椭圆和}x++;glVertex2i(x + xc, y + yc);glVertex2i(y + xc, x + yc);glVertex2i(y + xc, -x + yc);glVertex2i(x + xc, -y + yc);glVertex2i(-x + xc, -y + yc);glVertex2i(-y + xc, -x + yc);glVertex2i(-x + xc, y + yc);glVertex2i(-y + xc, x + yc);})椭圆：void Ellipsepot(int xO, int yO, int x, int y){//1setPixel((xO + x), (yO + y));// 2setPixel((xO + x), (yO - y));// 3setPixel((xO - x), (yO - y));// 4setPixel((xO - x), (yO + y));)〃中点画椭圆算法void MidPoint_Ellipse(int xO, int yO, int a, int b) {double sqa = a*a;double sqb = b*b;double d = sqb + sqa*(0. 25 - b);int x = 0;int y = b;Ellipsepot (xO, yO, x, y);// 1while (sqb*(x + 1) < sqa*(y - 0. 5)){if (d < 0)(else(d += (sqb*(2 * x + 3) + sqa*((-2)*y + 2));—y;}++x;Ellipsepot (xO, yO, x, y);}d = (b * (x + 0.5)) * 2 + (a * (y - 1)) * 2 - (a * b) * 2;// 2while (y > 0){if (d < 0)(d += sqb * (2 * x + 2) + sqa * ((-2) * y + 3);++x;}else(d += sqa * ((-2) * y + 3);}—y;Ellipsepot (xO, yO, x, y);}}阳 I 的 IB 法.cpp 七 x网圆的中点 IS 法7^fiinclude