c# – 渲染时纹理显示为灰色

我使用了与演示CD上相同的代码,虽然我必须将纹理的路径更改为绝对路径,但在渲染时它会显示为灰色.

我已经调试了程序来写入加载纹理的文件,这很好 – 没有问题.所以在那之后发生了一些错误.

以下是一些代码片段：

public void InitializeGraphics()
{
    // set up the parameters
    Direct3D.PresentParameters p = new Direct3D.PresentParameters();
    p.SwapEffect = Direct3D.SwapEffect.Discard;
    ...
    graphics = new Direct3D.Device( 0,Direct3D.DeviceType.Hardware,this,Direct3D.CreateFlags.SoftwareVertexProcessing,p );
    ...
    // set up various drawing options
    graphics.RenderState.CullMode = Direct3D.Cull.None;
    graphics.RenderState.AlphaBlendEnable = true;
    graphics.RenderState.AlphaBlendOperation = Direct3D.BlendOperation.Add;
    graphics.RenderState.DestinationBlend = Direct3D.Blend.InvSourceAlpha;
    graphics.RenderState.SourceBlend = Direct3D.Blend.SourceAlpha;
    ...
}

public void InitializeGeometry()
{
    ...
    texture = Direct3D.TextureLoader.FromFile( 
            graphics,"E:ProgrammingSharpDevelop_ProjectsAdvancedFrameworkv2texture.jpg",Direct3D.Format.Unknown,Direct3D.Pool.Managed,Direct3D.Filter.Linear,0 );
...
}

protected virtual void Render()
{
    graphics.Clear( Direct3D.ClearFlags.Target,Color.White,1.0f,0 );
    graphics.BeginScene();

    // set the texture
    graphics.SetTexture( 0,texture );

    // set the vertex format
    graphics.VertexFormat = Direct3D.CustomVertex.TransformedTextured.Format;

    // draw the triangles
    graphics.DrawUserPrimitives( Direct3D.PrimitiveType.TriangleStrip,2,vertexes );

    graphics.EndScene();
    graphics.Present();
    ...
}

我无法弄清楚这里出了什么问题.显然,如果我在Windows中加载纹理它显示正常 – 所以在书中给出的代码示例中有一些不正确的东西.它实际上并不起作用,并且我的环境肯定会出现问题.