地形纹理显示不了？？？
定义了顶点结构：
struct COSTOMVERTEX
{
float _x,_y,_z;//XYZ坐标
float _u,_v;//uv纹理坐标
COSTOMVERTEX(float x,float y,float z,float u,float v)
{
_x=x;
_y=y;
_z=z;
_u=u;
_v=v;
}
};
#define COSTOM_FVF (D3DFVF_XYZ|D3DFVF_TEX1)
然后是给顶点赋值：
void GameLodTerrain::SetNodeVertex(QuadTreeNode *pNode)
{
if(pNode->m_Size<2||pNode==NULL) return;
if (FALSE == pNode->m_bIsVisible||FALSE==pNode->m_bIsTouched)
return;
if (TRUE == pNode->m_bIsReached)
{
// fill vertex buffer
static INT nSizeDivide2 = m_row >> 1;
static INT R1=m_row-1;
INT L = pNode->m_CenterX - (pNode->m_Size >> 1); // left
INT R = pNode->m_CenterX + (pNode->m_Size >> 1); // right
INT X = pNode->m_CenterX; // center X
INT Y = pNode->m_CenterY; // center Y
INT T = pNode->m_CenterY - (pNode->m_Size >> 1); // top
INT B = pNode->m_CenterY + (pNode->m_Size >> 1); // bottom
// 0 1 2 TL Top TR
// 3 4 5 -> Left Center Right
// 6 7 8 BL Bottom BR
// TL
m_pVerticesPtr[m_vbIndex + 0]._x = (L - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 0]._z = -(T - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 0]._y = m_heightmap[L *m_row+ T];
m_pVerticesPtr[m_vbIndex + 0]._u = float(L/R1);
m_pVerticesPtr[m_vbIndex + 0]._v = float(T/R1);
// TOP
m_pVerticesPtr[m_vbIndex + 1]._x = (X - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 1]._z = -(T - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 1]._y = m_heightmap[X *m_row+ T];
m_pVerticesPtr[m_vbIndex + 1]._u = float(X/R1);
m_pVerticesPtr[m_vbIndex + 1]._v = float(T/R1);
// TR
m_pVerticesPtr[m_vbIndex + 2]._x = (R - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 2]._z = -(T - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 2]._y = m_heightmap[R *m_row+ T];
m_pVerticesPtr[m_vbIndex + 2]._u = float(R/R1);
m_pVerticesPtr[m_vbIndex + 2]._v = float(T/R1);
// LEFT
m_pVerticesPtr[m_vbIndex + 3]._x = (L - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 3]._z = -(Y - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 3]._y = m_heightmap[L *m_row+ Y];
m_pVerticesPtr[m_vbIndex + 3]._u = float(L/R1);
m_pVerticesPtr[m_vbIndex + 3]._v = float(Y/R1);
// CENTER
m_pVerticesPtr[m_vbIndex + 4]._x = (X - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 4]._z = -(Y - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 4]._y = m_heightmap[X *m_row+ Y];
m_pVerticesPtr[m_vbIndex + 4]._u = float(X/R1);
m_pVerticesPtr[m_vbIndex + 4]._v = float(Y/R1);
// RIGHT
m_pVerticesPtr[m_vbIndex + 5]._x = (R - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 5]._z = -(Y - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 5]._y = m_heightmap[R *m_row+ Y];
m_pVerticesPtr[m_vbIndex + 5]._u = float(R/R1);
m_pVerticesPtr[m_vbIndex + 5]._v = float(Y/R1);
// BL
m_pVerticesPtr[m_vbIndex + 6]._x = (L - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 6]._z = -(B - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 6]._y = m_heightmap[L *m_row+ B];
m_pVerticesPtr[m_vbIndex + 6]._u = float(L/R1);
m_pVerticesPtr[m_vbIndex + 6]._v = float(B/R1);
// BOTTOM
m_pVerticesPtr[m_vbIndex + 7]._x = (X - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 7]._z = -(B - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 7]._y = m_heightmap[X *m_row+ B];
m_pVerticesPtr[m_vbIndex + 7]._u = float(X/R1);
m_pVerticesPtr[m_vbIndex + 7]._v = float(B/R1);
// BR
m_pVerticesPtr[m_vbIndex + 8]._x = (R - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 8]._z = -(B - nSizeDivide2) * m_wScale;
m_pVerticesPtr[m_vbIndex + 8]._y = m_heightmap[R *m_row+ B];
m_pVerticesPtr[m_vbIndex + 8]._u = float(R/R1);
m_pVerticesPtr[m_vbIndex + 8]._v = float(B/R1);
// fill index buffer
// 0 1 2
// 3 4 5
// 6 7 8
m_pIndicesPtr[m_ibIndex+ 0] = (WORD)m_vbIndex + 0;
m_pIndicesPtr[m_ibIndex+ 1] = (WORD)m_vbIndex + 1;
m_pIndicesPtr[m_ibIndex+ 2] = (WORD)m_vbIndex + 4;
m_pIndicesPtr[m_ibIndex+ 3] = (WORD)m_vbIndex + 1;
m_pIndicesPtr[m_ibIndex+ 4] = (WORD)m_vbIndex + 2;
m_pIndicesPtr[m_ibIndex+ 5] = (WORD)m_vbIndex + 4;
m_pIndicesPtr[m_ibIndex+ 6] = (WORD)m_vbIndex + 2;
m_pIndicesPtr[m_ibIndex+ 7] = (WORD)m_vbIndex + 5;
m_pIndicesPtr[m_ibIndex+ 8] = (WORD)m_vbIndex + 4;
m_pIndicesPtr[m_ibIndex+ 9] = (WORD)m_vbIndex + 5;
m_pIndicesPtr[m_ibIndex+ 10] = (WORD)m_vbIndex + 8;
m_pIndicesPtr[m_ibIndex+ 11] = (WORD)m_vbIndex + 4;
m_pIndicesPtr[m_ibIndex+ 12] = (WORD)m_vbIndex + 8;
m_pIndicesPtr[m_ibIndex+ 13] = (WORD)m_vbIndex + 7;
m_pIndicesPtr[m_ibIndex+ 14] = (WORD)m_vbIndex + 4;
m_pIndicesPtr[m_ibIndex+ 15] = (WORD)m_vbIndex + 7;
m_pIndicesPtr[m_ibIndex+ 16] = (WORD)m_vbIndex + 6;
m_pIndicesPtr[m_ibIndex+ 17] = (WORD)m_vbIndex + 4;
m_pIndicesPtr[m_ibIndex+ 18] = (WORD)m_vbIndex + 6;
m_pIndicesPtr[m_ibIndex+ 19] = (WORD)m_vbIndex + 3;
m_pIndicesPtr[m_ibIndex+ 20] = (WORD)m_vbIndex + 4;
m_pIndicesPtr[m_ibIndex+ 21] = (WORD)m_vbIndex + 3;
m_pIndicesPtr[m_ibIndex+ 22] = (WORD)m_vbIndex + 0;
m_pIndicesPtr[m_ibIndex+ 23] = (WORD)m_vbIndex + 4;
m_vbIndex += 9;
m_ibIndex+= 24;
}
else if (!pNode->m_bIsLeaf)
{
SetNodeVertex(pNode->m_pTLChildNode);
SetNodeVertex(pNode->m_pTRChildNode);
SetNodeVertex(pNode->m_pBLChildNode);
SetNodeVertex(pNode->m_pBRChildNode);
}
}
渲染：
void GameLodTerrain::Render()
{
base::Instance().device->SetRenderState(D3DRS_LIGHTING, false);
base::Instance().device->SetRenderState(D3DRS_CULLMODE, D3DCULL_CW);
base::Instance().device->SetTransform(D3DTS_WORLD,&base::Instance().g_mWorld);
base::Instance().device->SetTexture(0,m_tex);
base::Instance().device->SetStreamSource(0, m_vb, 0, sizeof(COSTOMVERTEX));
base::Instance().device->SetFVF(COSTOM_FVF);
base::Instance().device->SetIndices(m_ib);
base::Instance().device->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 0,
m_vbIndex * 9, 0, m_vbIndex* 8);
base::Instance().device->SetRenderState(D3DRS_LIGHTING, true);
base::Instance().device->SetRenderState(D3DRS_CULLMODE, D3DCULL_CCW);
}
最后得到的结果：
也就是纹理显示不出来，请问高手是怎么回事哦？？
[解决办法]
以你的代码举例：
m_pVerticesPtr[m_vbIndex + 0]._v = float(T/R1);
这里面的，变量定义：
static INT R1=m_row-1;
INT T = pNode->m_CenterY - (pNode->m_Size >> 1); // top
显然，两个INT相除，结果必定是个INT，然后转换为float，肯定就不对了。
要先转换，再除：
m_pVerticesPtr[m_vbIndex + 0]._v = (float)T/R1;//或者T/(float)R1
