对象消失/不在OPENGL的Z-AXIS中缩放

Question

这段代码基本上是围绕中心点的QUAD轨道。问题是当X旋转精细时，它在Z轴上移动时消失，并且看起来没有变化。感觉它在Orthagraphic视图中呈现所有内容。

这是我的第一个OpenGL项目。

OPENGL CODE从这里开始

        glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        glClear(GL_COLOR_BUFFER_BIT);
        glMatrixMode (GL_PROJECTION);

        glPushMatrix();
       //glRotatef(theta, 0.0f, 0.0f, 1.0f);
       glScalef(0.75f, 0.75f, 0.75f);
       glTranslatef(planeX, -0.0f, 0.0f);

        glBegin(GL_QUADS);
            glColor3f(1.0f, 0.0f, 0.0f);   glVertex3f(0.0f,   0.0f, planeZ);
            glColor3f(0.0f, 1.0f, 0.0f);   glVertex3f(0.0f,   1.0f, planeZ);
            glColor3f(0.0f, 0.0f, 1.0f);   glVertex3f(1.0f,   1.0f, planeZ);
            glColor3f(0.0f, 0.0f, 1.0f);   glVertex3f(1.0f,   0.0f, planeZ);
        glEnd();

        glPopMatrix();

        SwapBuffers(hDC);

        theta += 1.0f;

        planeX = (sin(0.0314159265f*theta));
        planeZ = (cos(0.0314159265f*theta));
        Sleep (1);

结束此处

Answer 1

Help stamp out GL_PROJECTION abuse.