gluLookAt不起作用

Question

我用opengl编程,我想改变相机视图:

...

void RenderScene() //Zeichenfunktion
{

 glClearColor( 1.0, 0.5, 0.0, 0 );
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); 
   glLoadIdentity ();  


    //1.Form:
    glBegin( GL_POLYGON );  //polygone

    glColor3f( 1.0f, 0.0f, 0.0f );  //rot
    glVertex3f( -0.5, -0.5, -0.5 ); //unten links   3 =3 koords, f=float


    glColor3f( 0.0f, 0.0f, 1.0f ); //blau 
    glVertex3f(  0.5, -0.5, -0.5 ); //unten rechts
    glVertex3f(  0.5,  0.5, -0.5 );//oben rechts
    glVertex3f( -0.5,  0.5, -0.5 );//oben links
    glEnd();



    Wuerfel(0.7);   //creates cube with length 0.7

    gluLookAt ( 0., 0.3, 1.0, 0., 0.7, 0., 0., 1., 0.);




   glFlush(); //Buffer leeren   
}

...

当我改变gluLookAt的参数时,什么都没发生,我错了什么？谢谢

Answer 1

gluLookAt修改当前的变换矩阵,因此它只对调用后呈现的内容产生影响.尝试将gluLookAt放在渲染代码之前.