java - OpenGL + Slick 加载的纹理正在旋转

Question

我正在使用OpenGL在Java中创建3D游戏引擎。我正在使用 slick 库来实现纹理。 我正在使用一种方法来创建矩形/方形棱柱(6 个正方形/矩形)。用同样的方法，我实现了纹理。

问题是棱镜的 5 个边渲染为 90 度旋转纹理。铺设地板时这并不重要，但由于我在砖墙纹理上使用它，所以看起来不太正确。

由于这是一堵墙，我只关心它的 4 个面。

墙壁纹理在棱镜的 3 条边上旋转 90 度进行渲染。并且仅在一侧渲染时不旋转。

我无法解决这个问题。我需要更改纹理的实现方式吗？

这是创建棱镜的方法。

public static void quadPrizm(float x, float y, float z, float sx, float sy, float sz, Texture tex){
    glPushMatrix();
    {
        glTranslatef(x, y, z);

        tex.bind();
        glBegin(GL_QUADS);
        {
            //ROTATED (WRONG)
            glTexCoord2f(0, 0); glVertex3f(-sx/2, -sy/2, sz/2);
            glTexCoord2f(0, 4); glVertex3f(sx/2, -sy/2, sz/2);
            glTexCoord2f(4, 4); glVertex3f(sx/2, sy/2, sz/2);
            glTexCoord2f(4, 0); glVertex3f(-sx/2, sy/2, sz/2);

            //THE CORRECT SIDE
            glTexCoord2f(0, 0); glVertex3f(-sx/2, -sy/2, -sz/2);
            glTexCoord2f(0, 4); glVertex3f(-sx/2, sy/2, -sz/2);
            glTexCoord2f(4, 4); glVertex3f(sx/2, sy/2, -sz/2);
            glTexCoord2f(4, 0); glVertex3f(sx/2, -sy/2, -sz/2);

            //ROTATED (WRONG)
            glTexCoord2f(0, 0); glVertex3f(-sx/2, -sy/2, -sz/2);
            glTexCoord2f(0, 4); glVertex3f(-sx/2, -sy/2, sz/2);
            glTexCoord2f(4, 4); glVertex3f(-sx/2, sy/2, sz/2);
            glTexCoord2f(4, 0); glVertex3f(-sx/2, sy/2, -sz/2);

            //ROTATED (WRONG)
            glTexCoord2f(0, 0); glVertex3f(sx/2, -sy/2, -sz/2);
            glTexCoord2f(0, 4); glVertex3f(sx/2, -sy/2, sz/2);
            glTexCoord2f(4, 4); glVertex3f(sx/2, sy/2, sz/2);
            glTexCoord2f(4, 0); glVertex3f(sx/2, sy/2, -sz/2);

            //BOTTOM SIDE
            glTexCoord2f(0, 0); glVertex3f(-sx/2, -sy/2, -sz/2);
            glTexCoord2f(0, 4); glVertex3f(sx/2, -sy/2, -sz/2);
            glTexCoord2f(4, 4); glVertex3f(sx/2, -sy/2, sz/2);
            glTexCoord2f(4, 0); glVertex3f(-sx/2, -sy/2, sz/2);

            //TOP SIDE
            glTexCoord2f(0, 0); glVertex3f(-sx/2, sy/2, -sz/2);
            glTexCoord2f(0, 4); glVertex3f(sx/2, sy/2, -sz/2);
            glTexCoord2f(4, 4); glVertex3f(sx/2, sy/2, sz/2);
            glTexCoord2f(4, 0); glVertex3f(-sx/2, sy/2, sz/2);
        }
        glEnd();
    }
    glPopMatrix();
}

通过下面的代码行，我创建了一个带有墙壁纹理的立方体。

Draw.cube(0, 10, 10, 5, 5, 5, wall);

这是三个旋转边之一:

这是唯一正确的一面:

Answer 1

我已经通过更改纹理坐标解决了这个问题。新的代码是这样的:

public static void quadPrizm(float x, float y, float z, float sx, float sy, float sz, Texture tex){
glPushMatrix();
{
    glTranslatef(x, y, z);

    tex.bind();
    glBegin(GL_QUADS);
    {
        //ROTATED (WRONG)
        glTexCoord2f(4, 0); glVertex3f(-sx/2, -sy/2, sz/2);
        glTexCoord2f(0, 0); glVertex3f(sx/2, -sy/2, sz/2);
        glTexCoord2f(0, 4); glVertex3f(sx/2, sy/2, sz/2);
        glTexCoord2f(4, 4); glVertex3f(-sx/2, sy/2, sz/2);

        //THE CORRECT SIDE
        glTexCoord2f(0, 0); glVertex3f(-sx/2, -sy/2, -sz/2);
        glTexCoord2f(0, 4); glVertex3f(-sx/2, sy/2, -sz/2);
        glTexCoord2f(4, 4); glVertex3f(sx/2, sy/2, -sz/2);
        glTexCoord2f(4, 0); glVertex3f(sx/2, -sy/2, -sz/2);

        //ROTATED (WRONG)
        glTexCoord2f(4, 0); glVertex3f(-sx/2, -sy/2, -sz/2);
        glTexCoord2f(0, 0); glVertex3f(-sx/2, -sy/2, sz/2);
        glTexCoord2f(0, 4); glVertex3f(-sx/2, sy/2, sz/2);
        glTexCoord2f(4, 4); glVertex3f(-sx/2, sy/2, -sz/2);

        //ROTATED (WRONG)
        glTexCoord2f(4, 0); glVertex3f(sx/2, -sy/2, -sz/2);
        glTexCoord2f(0, 0); glVertex3f(sx/2, -sy/2, sz/2);
        glTexCoord2f(0, 4); glVertex3f(sx/2, sy/2, sz/2);
        glTexCoord2f(4, 4); glVertex3f(sx/2, sy/2, -sz/2);

        //BOTTOM SIDE
        glTexCoord2f(0, 0); glVertex3f(-sx/2, -sy/2, -sz/2);
        glTexCoord2f(0, 4); glVertex3f(sx/2, -sy/2, -sz/2);
        glTexCoord2f(4, 4); glVertex3f(sx/2, -sy/2, sz/2);
        glTexCoord2f(4, 0); glVertex3f(-sx/2, -sy/2, sz/2);

        //TOP SIDE
        glTexCoord2f(0, 0); glVertex3f(-sx/2, sy/2, -sz/2);
        glTexCoord2f(0, 4); glVertex3f(sx/2, sy/2, -sz/2);
        glTexCoord2f(4, 4); glVertex3f(sx/2, sy/2, sz/2);
        glTexCoord2f(4, 0); glVertex3f(-sx/2, sy/2, sz/2);
        }
        glEnd();
    }
    glPopMatrix();
}