Direct3D 9学习笔记(12)网格(Mesh)3

最新推荐文章于 2020-01-17 01:21:52 发布

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最新推荐文章于 2020-01-17 01:21:52 发布

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原文链接：http://www.cnblogs.com/Clingingboy/archive/2012/08/23/2653366.html

本文详细介绍了如何使用D3DXLoadMeshFromX加载XFile，并处理加载后的材料和纹理，包括设置材料属性、加载纹理文件以及在场景中应用这些资源。

一.ID3DXBuffer

二.XFile

加载XFile

示例

HRESULT hr = 0;

//
// Load the XFile data.
//

ID3DXBuffer* adjBuffer  = 0;
ID3DXBuffer* mtrlBuffer = 0;
DWORD        numMtrls   = 0;

hr = D3DXLoadMeshFromX(  
    "bigship1.x",
    D3DXMESH_MANAGED,
    Device,
    &adjBuffer,
    &mtrlBuffer,
    0,
    &numMtrls,
    &Mesh);

if(FAILED(hr))
{
    ::MessageBox(0, "D3DXLoadMeshFromX() - FAILED", 0, 0);
    return false;
}

//
// Extract the materials, and load textures.
//

if( mtrlBuffer != 0 && numMtrls != 0 )
{
    D3DXMATERIAL* mtrls = (D3DXMATERIAL*)mtrlBuffer->GetBufferPointer();

    for(int i = 0; i < numMtrls; i++)
    {
        // the MatD3D property doesn't have an ambient value set
        // when its loaded, so set it now:
        mtrls[i].MatD3D.Ambient = mtrls[i].MatD3D.Diffuse;

        // save the ith material
        Mtrls.push_back( mtrls[i].MatD3D );

        // check if the ith material has an associative texture
        if( mtrls[i].pTextureFilename != 0 )
        {
            // yes, load the texture for the ith subset
            IDirect3DTexture9* tex = 0;
            D3DXCreateTextureFromFile(
                Device,
                mtrls[i].pTextureFilename,
                &tex);

            // save the loaded texture
            Textures.push_back( tex );
        }
        else
        {
            // no texture for the ith subset
            Textures.push_back( 0 );
        }
    }
}

Device->BeginScene();

for(int i = 0; i < Mtrls.size(); i++)
{
    Device->SetMaterial( &Mtrls[i] );
    //Device->SetTexture(0, Textures[i]);
    Mesh->DrawSubset(i);
}    

Device->EndScene();