opengl学习之 旋转的六边形

#include <glut.h>
#include <math.h>
#define PI 3.14159  //设置圆周率
int n = 6, R = 10;  //多边形变数，外接圆半径
float cx = 0, cy = 0;

float theta = 0.0;  //旋转初始角度值
void Keyboard(unsigned char key, int x, int y);
void Display(void);
void Reshape(int w, int h);
void myidle();

int APIENTRY _tWinMain(HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPTSTR    lpCmdLine,
    int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    char *argv[] = { "hello ", " " };
    int argc = 2; // must/should match the number of strings in argv

    glutInit(&argc, argv);  //初始化GLUT库；
    glutInitWindowSize(700, 700);  //设置显示窗口大小