OpenGL纹理立方体没有正确映射

Question

几天前，我开始了一个与opengl 1.1（我知道它非常过时）的小体素游戏。我使用sfml库来创建一个opengl上下文。我认为问题出在纹理坐标上，但我不确定。渲染代码：

glPushMatrix(); 
    glBegin(GL_QUADS); 
    glColor3f(0.5, 0.5, 0.5); 
    //front 
    glTexCoord2f(0, 0); glVertex3f(0, 0, 0); 
    glTexCoord2f(1, 0); glVertex3f(0, 1, 0); 
    glTexCoord2f(1, 1); glVertex3f(1, 1, 0); 
    glTexCoord2f(1, 0); glVertex3f(1, 0, 0); 
    //back 
    glTexCoord2f(0, 0); glVertex3f(0, 0, 1); 
    glTexCoord2f(1, 0); glVertex3f(0, 1, 1); 
    glTexCoord2f(1, 1); glVertex3f(1, 1, 1); 
    glTexCoord2f(1, 0); glVertex3f(1, 0, 1); 
    glColor3f(0.6, 0.6, 0.6); 
    //top 
    glTexCoord2f(0, 0); glVertex3f(0, 1, 0); 
    glTexCoord2f(1, 0); glVertex3f(0, 1, 1); 
    glTexCoord2f(1, 1); glVertex3f(1, 1, 1); 
    glTexCoord2f(1, 0); glVertex3f(1, 1, 0); 
    //bottom 
    glTexCoord2f(0, 0); glVertex3f(0, 0, 0); 
    glTexCoord2f(1, 0); glVertex3f(0, 0, 1); 
    glTexCoord2f(1, 1); glVertex3f(1, 0, 1); 
    glTexCoord2f(1, 0); glVertex3f(1, 0, 0); 
    glColor3f(0.7, 0.7, 0.7); 
    //left 
    glTexCoord2f(0, 0); glVertex3f(0, 0, 0); 
    glTexCoord2f(1, 0); glVertex3f(0, 1, 0); 
    glTexCoord2f(1, 1); glVertex3f(0, 1, 1); 
    glTexCoord2f(1, 0); glVertex3f(0, 0, 1); 
    //right 
    glTexCoord2f(0, 0); glVertex3f(1, 0, 0); 
    glTexCoord2f(1, 0); glVertex3f(1, 1, 0); 
    glTexCoord2f(1, 1); glVertex3f(1, 1, 1); 
    glTexCoord2f(1, 0); glVertex3f(1, 0, 1); 
    glEnd(); 
    glPopMatrix(); 

这是在游戏中的木纹理的一个：

这是木材纹理的图片：

它被映射在真古怪。哪里不对？有人可以发布一个普通纹理立方体的例子吗？

Answer 1

试着改变你的代码：

glTexCoord2f(0, 0); ... 
glTexCoord2f(1, 0); ... 
glTexCoord2f(1, 1); ... 
glTexCoord2f(1, 0); ... 

到

glTexCoord2f(0, 0); ... 
glTexCoord2f(1, 0); ... 
glTexCoord2f(1, 1); ... 
glTexCoord2f(0, 1); ... (changed this line) 

你映射立方体的两个角纹理的相同点。