OpenGL绘制球体

最新推荐文章于 2023-10-04 12:03:55 发布

转载最新推荐文章于 2023-10-04 12:03:55 发布 · 1.8w 阅读

文章标签：

#float #im

OpenGL 专栏收录该内容

280 篇文章

订阅专栏

//球心坐标为（x，y，z），球的半径为radius，M，N分别表示球体的横纵向被分成多少份
void drawSphere(GLfloat xx, GLfloat yy, GLfloat zz, GLfloat radius, GLfloat M, GLfloat N)
{
 float step_z = PI/M;
 float step_xy = 2*PI/N;
 float x[4],y[4],z[4];

 float angle_z = 0.0;
 float angle_xy = 0.0;
 int i=0, j=0;
 glBegin(GL_QUADS);
  for(i=0; i<M; i++)
  {
   angle_z = i * step_z;
   
   for(j=0; j<N; j++)
   {
    angle_xy = j * step_xy;

    x[0] = radius * sin(angle_z) * cos(angle_xy);
    y[0] = radius * sin(angle_z) * sin(angle_xy);
    z[0] = radius * cos(angle_z);

    x[1] = radius * sin(angle_z + step_z) * cos(angle_xy);
    y[1] = radius * sin(angle_z + step_z) * sin(angle_xy);
    z[1] = radius * cos(angle_z + step_z);

    x[2] = radius*sin(angle_z + step_z)*cos(angle_xy + step_xy);
    y[2] = radius*sin(angle_z + step_z)*sin(angle_xy + step_xy);
    z[2] = radius*cos(angle_z + step_z);

    x[3] = radius * sin(angle_z) * cos(angle_xy + step_xy);
    y[3] = radius * sin(angle_z) * sin(angle_xy + step_xy);
    z[3] = radius * cos(angle_z);

    for(int k=0; k<4; k++)
    {
     glVertex3f(xx+x[k], yy+y[k],zz+z[k]);
    }
   }
  }
 glEnd();
}