d3d载入x网格

本系列文章由zhmxy555（毛星云）编写，转载请注明出处。  

文章链接： http://blog.youkuaiyun.com/zhmxy555/article/details/8586540

作者：毛星云（浅墨）    邮箱： happylifemxy@163.com 

照此文码的,有点问题就是

for(DWORD i = 0; i < m_num_mtrl; i++)
	{
		p_mtrl[i].MatD3D.Ambient = p_mtrl[i].MatD3D.Diffuse;
		m_mtrl.push_back(&p_mtrl[i].MatD3D);

                D3DXCreateTextureFromFile(m_Device, p_mtrl[i].pTextureFilename, &p_tex);
		m_tex.push_back(p_tex);
	}

这个D3DXCreateTextureFromFile函数得到的是相对路径,

比如我将x文件和bmp放入src文件夹中那么D3DXCreateTextureFromFile得到的是.bmp而不是src//.bmp

空的纹理自然无法渲染...

#include "d3dUtility.h"
#include <string>
#include <vector>

using namespace std;

template < class T > void ClearVector( vector< T >& vt ) 
	{
		vector< T > vtTemp; 
		vtTemp.swap( vt );
	}

class CMesh
{
public:
	CMesh();
	~CMesh();

	void LoadMesh(string FileName);
	void CreateMesh();
	void Init(IDirect3DDevice9* device);
	void Draw();

private:
	ID3DXMesh* m_mesh;
	IDirect3DDevice9* m_Device;
	LPD3DXBUFFER      m_adj;

	vector<D3DMATERIAL9*>	  m_mtrl;
	vector<IDirect3DTexture9*> m_tex;

	DWORD             m_num_mtrl; 
};

#include "SimpleMesh.h"

CMesh::CMesh()
{
	 m_adj  = NULL;
}

CMesh::~CMesh()
{
	ClearVector<D3DMATERIAL9*>(m_mtrl);
	ClearVector<IDirect3DTexture9*>(m_tex);
	d3d::Release<ID3DXMesh*>(m_mesh);
	d3d::Release<LPD3DXBUFFER>(m_adj);
}

void CMesh::Init(IDirect3DDevice9* device)
{
	m_Device = device;
}

void CMesh::CreateMesh()
{

}

void CMesh::LoadMesh(string FileName)
{
	HRESULT hr;

	LPD3DXBUFFER mtrl_buffer;

	hr = D3DXLoadMeshFromX(
		FileName.c_str(),
		D3DXMESH_MANAGED,
		m_Device,
	  	&m_adj,
		&mtrl_buffer,
		NULL,
		&m_num_mtrl,
		&m_mesh);

	if(FAILED(hr))
		MessageBox(NULL, "D3DXCreateFont FAILED", "MSG", 0);

    /*
	  typedef struct D3DXMATERIAL {  
      D3DMATERIAL9 MatD3D;   //材质信息  
      LPSTR        pTextureFilename; //纹理贴图文件  
    } D3DXMATERIAL, *LPD3DXMATERIAL;  

	*/
	D3DXMATERIAL* p_mtrl = (D3DXMATERIAL*)mtrl_buffer->GetBufferPointer();
	IDirect3DTexture9* p_tex;

	for(DWORD i = 0; i < m_num_mtrl; i++)
	{
		p_mtrl[i].MatD3D.Ambient = p_mtrl[i].MatD3D.Diffuse;
		m_mtrl.push_back(&p_mtrl[i].MatD3D);
		string str("src\\");
		str += p_mtrl[i].pTextureFilename;
//		D3DXCreateTextureFromFile(m_Device, p_mtrl[i].pTextureFilename, &p_tex);
		D3DXCreateTextureFromFile(m_Device, str.c_str(), &p_tex);
		m_tex.push_back(p_tex);
	}

	d3d::Release<LPD3DXBUFFER>(mtrl_buffer);
}

void CMesh::Draw()
{
	for(DWORD i = 0; i < m_num_mtrl; i++)
	{
		m_Device->SetMaterial(m_mtrl[i]);
		m_Device->SetTexture(0, m_tex[i]);
		m_mesh->DrawSubset(i);
	}
}