Triangle Strip Question

	ZeroMemory(&m_pD3DParams, sizeof(m_pD3DParams));	m_pD3DParams.hDeviceWindow = m_hWnd;	m_pD3DParams.Windowed = m_bWindowed;	m_pD3DParams.SwapEffect = D3DSWAPEFFECT_DISCARD;	m_pD3DParams.BackBufferFormat = m_pD3DDisplayMode.Format;	m_pD3DParams.BackBufferCount = 1;	m_pD3DParams.BackBufferHeight = m_pD3DDisplayMode.Height;	m_pD3DParams.BackBufferWidth = m_pD3DDisplayMode.Width;	m_pD3DParams.EnableAutoDepthStencil = true;	m_pD3DParams.AutoDepthStencilFormat = D3DFMT_D24S8;	m_pD3DParams.MultiSampleType = D3DMULTISAMPLE_NONE;	m_pD3DParams.MultiSampleQuality = 0;	m_pD3DParams.Flags = 0;	if (!m_pD3DParams.Windowed)	{		m_pD3DParams.FullScreen_RefreshRateInHz = m_pD3DDisplayMode.RefreshRate;		m_pD3DParams.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;	}

BOOL loadTerr(){	FILE *Terrain;	Terrain = fopen("heightmap.raw","rb");	if(Terrain == NULL)		return FALSE;	fread(heightmap, 257*257, 1, Terrain);	fclose(Terrain);	int z=0,x=0,i=0;	for(z = 0; z < rows; z++)	{		for (x = 0; x < columns+1; x++)		{			float Height = heightmap[z * (rows + 1) + x];			float nextHeight = heightmap[(z + 1)* (columns+1) + x];			Verts.x = ((x - columns/2));			Verts.y = Height-0.2f;			Verts.z = ((z - rows/2));			Verts.nx = ((x - columns/2));			Verts.ny = Height;			Verts.nz = ((z - rows/2));			Verts.diffuse = D3DCOLOR_RGBA(0,150,0,255);			i++;			Verts.x = ((x - columns/2));			Verts.y = nextHeight-0.2f;			Verts.z = ((z - rows/2 + 1));			Verts.nx = ((x - columns/2));			Verts.ny = nextHeight;			Verts.nz = ((z - rows/2 + 1));			Verts.diffuse = D3DCOLOR_RGBA(0,150,0,255);						i++;		}	}	return TRUE;}

normal[x,z].y=1;normal[x,z].x=heightmap[x-1,z]-heightmap[x+1,z];normal[x,z].z=heightmap[x,z-1]-heightmap[x,z+1];Normalize(normal[x,z]);

void CDXTHeightMap::AddPatches(float xCount, float zCount){	m_nVertCount = 0;	CDXTPoint minBounds;	CDXTPoint maxBounds;	m_pPatches.reserve(m_ptPatchCount.Z * m_ptPatchCount.X);	for (int z = 0;z<m_ptPatchCount.Z;z++)	{		for (int x = 0;x<m_ptPatchCount.X;x++)		{			CDXTPatch* p = new CDXTPatch(m_pD3DDevice);			int id = x + (z * m_ptPatchCount.X);			minBounds = m_ptMinBounds + (m_ptStepCount * CDXTPoint(x,z));			maxBounds = minBounds + m_ptStepCount;			p->SetPatchID(id);			p->SetMinBounds(minBounds.X,minBounds.Z);			p->SetMaxBounds(maxBounds.X,maxBounds.Z);			p->SetCellCount(xCount,zCount);			p->SetEffect("Ambient.fx","TerrainPatchC");//techniques[0]);			p->CreatePatch();			p->PlaceInWorld(0.0f,0.0f,0.0f);			m_nVertCount += p->GetVertexCount();			m_pPatches.push_back(p);			int PatchCount = m_pPatches.size();		}	}}bool CDXTPatch::CreatePatch(void){	int ic = GetIndexCount();	int vc = GetVertexCount();	m_pPrimitives->Initialise(ic,vc,false);	m_pPrimitives->HasPosition();	m_pPrimitives->CreateVertexDeclaration();	if (!m_pPrimitives->Finalise(true))	{		MessageBox(NULL,"Failed to Finalise Object","Error",MB_OK);		return false;	}	if (!GenerateVertices())	{		MessageBox(NULL,"Failed to Create Vertices", "Error",MB_OK);		return false;	}	if (!GenerateIndices())	{		MessageBox(NULL,"Failed to Create Indices", "Error",MB_OK);		return false;	}	return true;}bool CDXTPatch::GenerateVertices(void){	// Vertex Buffer	CUSTOMVERTEX* pVertices;	if (!m_pPrimitives->SimpleVBLock((void**)&pVertices))	{		pVertices = NULL;		return false;	}	// Set the start position	CDXTPoint ptPosition(m_ptMinBounds.X,m_ptMaxBounds.Z);	int count=0;	// Loop across and down	for (int z=0;z<m_ptVertCount.Z;z++)	{		ptPosition.X = m_ptMinBounds.X;		for (int x=0;x<m_ptVertCount.X;x++)		{			float height = 0.0f;//heights[x + z * (int)multi];			// Create the verts			pVertices[count].x = ptPosition.X;			pVertices[count].y = height;//0.0f;			pVertices[count].z = ptPosition.Z;			// Increment x across			ptPosition.X += m_ptStepCount.X;			count++;		}		// Increment Z down		ptPosition.Z -= m_ptStepCount.Z;	}	m_pPrimitives->SimpleVBUnlock();	pVertices = NULL;	m_nVertices = count;	return true;}bool CDXTPatch::GenerateIndices(void){	// Indices for Triangle	WORD* pIndices;	if (!m_pPrimitives->SimpleIBLock((void**)&pIndices))	{		pIndices = NULL;		return false;	}	int count=0;	int vIndex=0;	for (int z=0;z<m_ptCellCount.Z;z++)	{		for (int x=0;x<m_ptCellCount.X;x++)		{			// first triangle			pIndices[count++]=vIndex;			pIndices[count++]=vIndex+1;			pIndices[count++]=vIndex+m_ptVertCount.X;				// second triangle			pIndices[count++]=vIndex+m_ptVertCount.X;			pIndices[count++]=vIndex+1;			pIndices[count++]=vIndex+m_ptVertCount.X+1;			vIndex++;		}		vIndex++;	}	m_pPrimitives->SimpleIBUnlock();	pIndices = NULL;	m_nIndices = vIndex;	return true;}