OpenGL紋理立方體沒有正確映射

Question

幾天前，我開始了一個與opengl 1.1（我知道它非常過時）的小體素遊戲。我使用sfml庫來創建一個opengl上下文。我認爲問題出在紋理座標上，但我不確定。渲染代碼：

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(); 

這是在遊戲中的木紋理的一個：

這是木材紋理的圖片：

它被映射在真古怪。哪裏不對？有人可以發佈一個普通紋理立方體的例子嗎？

Answer 1

試着改變你的代碼：

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) 

你映射立方體的兩個角紋理的相同點。