在立方体内制作照明并反射纹理

Question

我正试图让光线在我的立方体内闪耀，并反映我立方体底部的图像，我一直在努力使这项工作，但似乎我一直在失败我究竟应该做什么，可能是一些一个向我解释，我应该在下面的代码中添加什么，通常我的代码只是反映我创建的地板上的立方体的两侧....

这是我的下面的立方体代码

void drawCube(int textureId, float angle) {
    glDisable(GL_TEXTURE_2D);

    glPushMatrix();
     glRotatef( rotate_x, 1.0, 0.0, 0.0 );
  glRotatef( rotate_y, 0.0, 1.0, 0.0 );


    glBegin(GL_QUADS);


    //Bottom face
    glColor3f(1.0f, 0.0f, 1.0f);
    glNormal3f(0.0, -1.0f, 0.0f);
    glVertex3f(-BOX_SIZE / 2, -BOX_SIZE / 2, -BOX_SIZE / 2);
    glVertex3f(BOX_SIZE / 2, -BOX_SIZE / 2, -BOX_SIZE / 2);
    glVertex3f(BOX_SIZE / 2, -BOX_SIZE / 2, BOX_SIZE / 2);
    glVertex3f(-BOX_SIZE / 2, -BOX_SIZE / 2, BOX_SIZE / 2);

    glEnd();
    glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, textureId);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glColor3f(1.0f, 1.0f, 1.0f);
    glBegin(GL_QUADS);

    //Front face
    glNormal3f(0.0, 0.0f, 1.0f);
    glTexCoord2f(0.0f, 0.0f);
    glVertex3f(-BOX_SIZE / 2, -BOX_SIZE / 2, BOX_SIZE / 2);
    glTexCoord2f(1.0f, 0.0f);
    glVertex3f(BOX_SIZE / 2, -BOX_SIZE / 2, BOX_SIZE / 2);
    glTexCoord2f(1.0f, 1.0f);
    glVertex3f(BOX_SIZE / 2, BOX_SIZE / 2, BOX_SIZE / 2);
    glTexCoord2f(0.0f, 1.0f);
    glVertex3f(-BOX_SIZE / 2, BOX_SIZE / 2, BOX_SIZE / 2);

    glNormal3f(-1.0, 0.0f, 0.0f);
    glTexCoord2f(0.0f, 0.0f);
    glVertex3f(-BOX_SIZE / 2, -BOX_SIZE / 2, -BOX_SIZE / 2);
    glTexCoord2f(1.0f, 0.0f);
    glVertex3f(-BOX_SIZE / 2, -BOX_SIZE / 2, BOX_SIZE / 2);
    glTexCoord2f(1.0f, 0.0f);
    glVertex3f(-BOX_SIZE / 2, BOX_SIZE / 2, BOX_SIZE / 2);
    glTexCoord2f(1.0f, 0.0f);
    glVertex3f(-BOX_SIZE / 2, BOX_SIZE / 2, -BOX_SIZE / 2);


    //Back face
    glNormal3f(0.0, 0.0f, -1.0f);
    glTexCoord2f(0.0f, 0.0f);
    glVertex3f(-BOX_SIZE / 2, -BOX_SIZE / 2, -BOX_SIZE / 2);
    glTexCoord2f(1.0f, 0.0f);
    glVertex3f(-BOX_SIZE / 2, BOX_SIZE / 2, -BOX_SIZE / 2);
    glTexCoord2f(1.0f, 1.0f);
    glVertex3f(BOX_SIZE / 2, BOX_SIZE / 2, -BOX_SIZE / 2);
    glTexCoord2f(0.0f, 1.0f);
    glVertex3f(BOX_SIZE / 2, -BOX_SIZE / 2, -BOX_SIZE / 2);

    glEnd();

    glPopMatrix();
}

这是我的代码，其中光是

void drawScene() {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    glTranslatef(0.0f, 0.0f, -40.0f);
    glRotatef(30, 1, 0, 0);

    GLfloat ambientLight[] = {0.3f, 0.3f, 0.3f, 1.0f};
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);

    GLfloat lightColor[] = {0.7f, 0.7f, 0.7f, 1.0f};
    GLfloat lightPos[] = {-2 * BOX_SIZE, BOX_SIZE, 4 * BOX_SIZE, 1.0f};
    glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
    glLightfv(GL_LIGHT0, GL_POSITION, lightPos);

    glPushMatrix();
    glTranslatef(0, BOX_HEIGHT, 0);
    drawCube(_textureId, _angle);
    glPopMatrix();

    glEnable(GL_STENCIL_TEST); //Enable using the stencil buffer
    glColorMask(0, 0, 0, 0); //Disable drawing colors to the screen
    glDisable(GL_DEPTH_TEST); //Disable depth testing
    glStencilFunc(GL_ALWAYS, 1, 1); //Make the stencil test always pass
    //Make pixels in the stencil buffer be set to 1 when the stencil test passes
    glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
    //Set all of the pixels covered by the floor to be 1 in the stencil buffer
    drawFloor(_textureId);

    glColorMask(1, 1, 1, 1); //Enable drawing colors to the screen
    glEnable(GL_DEPTH_TEST); //Enable depth testing
    //Make the stencil test pass only when the pixel is 1 in the stencil buffer
    glStencilFunc(GL_EQUAL, 1, 1);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); //Make the stencil buffer not change

    //Draw the cube, reflected vertically, at all pixels where the stencil
    //buffer is 1
    glPushMatrix();
    glScalef(1, -1, 1);
    glTranslatef(0, BOX_HEIGHT, 0);
    drawCube(_textureId, _angle);
    glPopMatrix();

    glDisable(GL_STENCIL_TEST); //Disable using the stencil buffer

    //Blend the floor onto the screen
    glEnable(GL_BLEND);
    glColor4f(1, 1, 1, 0.7f);
    drawFloor(_textureId);
    glDisable(GL_BLEND);

    glutSwapBuffers();
}