[DirectX 10]Problem with ID3DX10Mesh

109

Author

October 09, 2011 05:52 PM

When I try to create a grid using ID3DX10Mesh, it turns out to be some sort of pyramid, like this

,
but when I use buffers, it works just fine.
Here is my code.





void GameStart()

{

	D3D10_INPUT_ELEMENT_DESC layout[] = {

		{"POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0},

		{"COLOR", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0},

	};



	g_pGame->CreateRasterizer(D3D10_FILL_WIREFRAME, D3D10_CULL_NONE, true);



	int numElements = (sizeof(layout) / sizeof(layout[0]));

	//Declare the vertices

	VertexStruct vertices[NUM_VERTSX * NUM_VERTSY];



	for(int z = 0; z < NUM_VERTSY; ++z)

	{

		for(int x = 0; x < NUM_VERTSX; ++x)

		{

			vertices[x + z * NUM_VERTSX].Pos.x = (float)(x * CELL_WIDTH);

			vertices[x + z * NUM_VERTSX].Pos.z = (float)(z * CELL_HEIGHT);



			//Have the height be randomly generated

			vertices[x + z * NUM_VERTSX].Pos.y = 0.0f;



			vertices[x + z * NUM_VERTSX].Color = D3DXVECTOR4(1.0f, 0.0f, 0.0f, 0.0f);

		}

	}

	//Find out how many vertices are in the array

	int iNumVertices = sizeof(vertices) / sizeof(VertexStruct);



	//Declare the indices

	DWORD indices[NUM_VERTSX * NUM_VERTSY * 6];

	//current int counter

	int curIndex = 0;



	for (int z=0; z < NUM_ROWS; z++)	

	{

		for (int x=0; x < NUM_COLS; x++)

		{

			// The current vertex to build off of

			int curVertex = x + (z * NUM_VERTSX);



			// Create the indices for the first triangle

			indices[curIndex]   = curVertex;

			indices[curIndex+1] = curVertex + NUM_VERTSX;

			indices[curIndex+2] = curVertex + 1;



			// Create the indices for the second triangle

			indices[curIndex+3] = curVertex + 1;

			indices[curIndex+4] = curVertex + NUM_VERTSX;

			indices[curIndex+5] = curVertex + NUM_VERTSX + 1;



			// increment curIndex by the number of vertices for the two triangles

			curIndex += 6;

		}

	}



	int numIndices = sizeof(indices) / sizeof(DWORD);



	ID3D10Blob* pError = NULL;



	D3DX10CreateEffectFromFile(TEXT("Effect.fx"), NULL, NULL, "fx_4_0", D3D10_SHADER_ENABLE_STRICTNESS, 0, g_pGame->GetDevice(),

		NULL, NULL, &g_pEffect, &pError, NULL);



	LPVOID l_pError = NULL;

	if(pError)

		l_pError = pError->GetBufferPointer();



	//Create Input layout

	ID3D10InputLayout* pLayout;

	D3D10_PASS_DESC passDesc;

	g_pEffect->GetTechniqueByName("Render")->GetPassByIndex(0)->GetDesc(&passDesc);

	g_pGame->GetDevice()->CreateInputLayout(layout, numElements, passDesc.pIAInputSignature, passDesc.IAInputSignatureSize, &pLayout);



	//Create a temporary mesh object

	ID3DX10Mesh* pTempMesh;

	HRESULT hr  = D3DX10CreateMesh(g_pGame->GetDevice(), layout, numElements, "POSITION", iNumVertices, 

		(numIndices / 3), D3DX10_MESH_32_BIT, &pTempMesh);



	//Set the vertices and indices to the mesh

	hr = pTempMesh->SetVertexData(0, vertices);

	hr = pTempMesh->SetIndexData(indices, numIndices);

	hr = pTempMesh->CommitToDevice();



	//Create the model object

	g_pModel = new ModelObject(g_pGame->GetDevice(), pLayout, pTempMesh, g_pEffect->GetTechniqueByName("Render"));



	g_pGame->CreateEffectMatrices(g_pEffect);



	//Set the Eye and At vector for the camera

	g_vEye = D3DXVECTOR3(0.0f, 175.0f, -300.0f);

	g_vAt = D3DXVECTOR3(0.0f, 0.0f, 0.0f);



	g_pGame->SetCamera(g_vEye, g_vAt);

}



void ModelObject::Draw()

{

	//Make sure the mesh is valid

	if(!m_pMesh)

		return;



	m_pDevice->IASetInputLayout(m_pInputLayout);



	D3D10_TECHNIQUE_DESC TechniqueDesc;

	m_pTechnique->GetDesc(&TechniqueDesc);



	for(UINT p = 0; p < TechniqueDesc.Passes; ++p)

	{

		m_pTechnique->GetPassByIndex(p)->Apply(0);



		//Draw the mesh

		m_pMesh->DrawSubset(0);

	}

}