如何在DirectX9中修复纹理

Question

我尝试使用Directx9绘制地形。 我设置了顶点和索引，但是效果不佳。 某些多边形不可见，如这张图片。 为什么不绘制某些多边形？我该如何解决此问题。 请帮助我。

下面的代码是解锁后顶点和索引缓冲区的一部分。

MYINDEX结构包含每个单词类型的三个索引。

TERRAINVERTEX结构包含DXVECTOR3用于位置 和DXVECTOR2作为uv坐标。

TERRAINVERTEX v;
pv = (TERRAINVERTEX *)pVertices;

MYINDEX i;
pi = (MYINDEX*)pIndices;

int offSet = 0;

for (int z = 0; z < m_iCz-1; ++z)
{
    for (int x = 0; x < m_iCx-1; ++x)
    {
        // left top
        v.point.x = (float)((x - m_iCx / 2) * m_vfScale.x);
        v.point.z = -(float)((z - m_iCz / 2) * m_vfScale.z);
        v.point.y = 0.0f;

        v.texture.x = 0;
        v.texture.y = 0;
        pi->i_0 = offSet++;
        *pv++ = v;

        //right top
        v.point.x = (float)(((x+1 - m_iCx / 2) * m_vfScale.x));
        v.point.z = -(float)((z - m_iCz / 2) * m_vfScale.z);
        v.point.y = 0.0f;

        v.texture.x = 1;
        v.texture.y = 0;
        pi->i_1 = offSet++;
        *pv++ = v;

        //left down
        v.point.x = (float)(((x  - m_iCx / 2) * m_vfScale.x));
        v.point.z = -(float)((z + 1 - m_iCz / 2) * m_vfScale.z);
        v.point.y = 0.0f;

        v.texture.x = 0;
        v.texture.y = 1;
        pi->i_2 = offSet++;
        *pv++ = v;

        ++pi;

        //right down
        v.point.x = (float)(((x + 1 - m_iCx / 2) * m_vfScale.x));
        v.point.z = -(float)((z + 1 - m_iCz / 2) * m_vfScale.z);
        v.point.y = 0.0f;

        v.texture.x = 1;
        v.texture.y = 1;
        pi->i_0 = offSet++;

        *pv++ = v;

        //left down
        v.point.x = (float)(((x + 1 - m_iCx / 2) * m_vfScale.x));
        v.point.z = -(float)((z + 1 - m_iCz / 2) * m_vfScale.z);
        v.point.y = 0.0f;

        v.texture.x = 0;
        v.texture.y = 1;
        pi->i_1 = offSet++;
        *pv++ = v;

        //right top
        v.point.x = (float)(((x + 1 - m_iCx / 2) * m_vfScale.x));
        v.point.z = -(float)((z - m_iCz / 2) * m_vfScale.z);
        v.point.y = 0.0f;

        v.texture.x = 1;
        v.texture.y = 0;
        pi->i_2 = offSet++;
        *pv++ = v;

        ++pi;
    }
}