java - LWJGL 只旋转一个物体

Question

我正在尝试仅旋转我在 Java 中创建的场景中的两个对象之一LWJGL.
现在，当我尝试旋转一个物体时，它并没有围绕它的中心旋转，而是在大圆圈中旋转。在 Google 上搜索后，我现在知道它应该是这样工作的:

glPushMatrix();
glBegin();

  //Code in here

glEnd();
glRotate();
glPopMatrix();

但这对我不起作用。物体没有旋转。这是我的渲染代码:

    public void render() {

        glPushMatrix();

            glRotatef(rotate, 0, 1.0f, 0);                   

            glBegin(GL_QUADS);

                // Top
                glVertex3f(-centerX + size, centerY + size, -centerZ - size);
                glVertex3f(-centerX - size, centerY + size, -centerZ - size);
                glVertex3f(-centerX - size, centerY + size, -centerZ + size);
                glVertex3f(-centerX + size, centerY + size, -centerZ + size);
                // Bottom
                glVertex3f(-centerX + size, centerY - size, -centerZ + size);
                glVertex3f(-centerX - size, centerY - size, -centerZ + size);
                glVertex3f(-centerX - size, centerY - size, -centerZ - size);
                glVertex3f(-centerX + size, centerY - size, -centerZ - size);
                // One side
                glVertex3f(-centerX + size, centerY + size, -centerZ + size);
                glVertex3f(-centerX - size, centerY + size, -centerZ + size);
                glVertex3f(-centerX - size, centerY - size, -centerZ + size);
                glVertex3f(-centerX + size, centerY - size, -centerZ + size);
                // Moar sides
                glVertex3f(-centerX + size, centerY - size, -centerZ - size);
                glVertex3f(-centerX - size, centerY - size, -centerZ - size);
                glVertex3f(-centerX - size, centerY + size, -centerZ - size);
                glVertex3f(-centerX + size, centerY + size, -centerZ - size);
                // Last side
                glVertex3f(-centerX - size, centerY + size, -centerZ + size);
                glVertex3f(-centerX - size, centerY + size, -centerZ - size);
                glVertex3f(-centerX - size, centerY - size, -centerZ - size);
                glVertex3f(-centerX - size, centerY - size, -centerZ + size);
                // Real last side
                glVertex3f(-centerX + size, centerY + size, -centerZ - size);
                glVertex3f(-centerX + size, centerY + size, -centerZ + size);
                glVertex3f(-centerX + size, centerY - size, -centerZ + size);
                glVertex3f(-centerX + size, centerY - size, -centerZ - size);

            glEnd();

        glPopMatrix();

        rotate++;
}

我现在尝试解决这个问题几个小时，但无法让它工作。

Answer 1

在绘制四边形之前，您应该调用 glRotate() 和 glTranslate()。

请记住，转换顺序很重要。旋转始终大约为 0,0,0，因此如果您先平移，它会围绕圆中的一个点“旋转”。如果您希望它围绕自己的轴旋转(您可能会这样做)先旋转，然后平移。

这篇文章中有一节是关于转换顺序的。

http://www.glprogramming.com/red/chapter03.html