//////////////////////////////////////////////////////////////////////////////////////////////////////
public void Render()
{
if (deviceLost)
{
AttemptRecovery();
}
if (deviceLost)
{
return;
}
device.RenderState.Lighting = false;
device.RenderState.CullMode = Cull.CounterClockwise; //右手系拣选
device.SamplerState[0].MagFilter = D3DConfiguration.GetAppropriateTextureMagFilter(); //放大滤波
device.SamplerState[0].MinFilter = D3DConfiguration.GetAppropriateTextureMinFilter(); //缩小滤波
if (DisplayWireFrame == 1 || DisplayWireFrame == 2) //显示贴图线框或纯线框
{
device.RenderState.FillMode = FillMode.WireFrame;
}
else //显示贴图
{
device.RenderState.FillMode = FillMode.Solid;
}
if (DrawBackground)
{
device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.FromArgb(0xff, 0x0, 0xff), 1.0F, 0);
}
else
{
device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0F, 0);
}
device.RenderState.SlopeScaleDepthBias = 3F; //全局性的加大所有Z-Depth间隔值，防止Z-Fighting
//device.RenderState.DepthBias = 1F; //加性调整个别对象的Z-Depth值，其值因不同对象而异，因此效果远不及全局性调整SlopeScaleDepthBias好
//处理Transparent Color Key的关键点：
//只要alpha值大于等于1的点才显示并更新zbuf！即，alpha=0的点直接不画，也不会影响zbuf!
device.RenderState.AlphaTestEnable = true;
device.RenderState.AlphaFunction = Compare.GreaterEqual;
device.RenderState.ReferenceAlpha = 1;
//用于AlphaBlend的贴图Alpha混合参数，注意，AlphaBlend与AlphaTest是完全不同的概念
device.RenderState.SourceBlend = Blend.SourceAlpha;
device.RenderState.DestinationBlend = Blend.InvSourceAlpha;
device.TextureState[0].ColorOperation = TextureOperation.Modulate;
device.TextureState[0].ColorArgument1 = TextureArgument.TextureColor;
device.TextureState[0].ColorArgument2 = TextureArgument.Diffuse;
device.TextureState[0].AlphaOperation = TextureOperation.Modulate;
device.TextureState[0].AlphaArgument1 = TextureArgument.TextureColor;
device.TextureState[0].AlphaArgument2 = TextureArgument.Diffuse;
device.BeginScene();
{
SetupMatrices();
device.VertexFormat = CustomVertex.PositionColoredTextured.Format;
device.SetStreamSource(0, mm.vexbuf, 0);
//以下是无需alpha混合的贴图处理过程
device.RenderState.AlphaBlendEnable = false;
for (int i = 0; i < mm.texture.Length; i++)
{
if (DisplayWireFrame == 2) //纯线框
{
device.SetTexture(0, null);
}
else //贴图线框或者是贴图
{
device.SetTexture(0, mm.texture[i]);
}
//必须首先绘制无Alpha混合的贴图(包括未知类型的贴图)，否则将导致后继Alpha混合不正确
if (mbi.texturetype[i] != 2 && mbi.texturetype[i] != 4)
{
int count = (mm.txtoffset[i + 1] - mm.txtoffset[i]) / 3;
if (count != 0)
{
device.DrawPrimitives(PrimitiveType.TriangleList, mm.txtoffset[i], count);
}
}
}
//以下是需要alpha混合的贴图处理过程
device.RenderState.AlphaBlendEnable = true;
for (int i = 0; i < mm.texture.Length; i++)
{
if (DisplayWireFrame == 2) //纯线框
{
device.SetTexture(0, null);
}
else //贴图线框或者是贴图
{
device.SetTexture(0, mm.texture[i]);
}
//然后再绘制贴图类型为2,4的区域，因为这些区域需要Alpha混合
//贴图的索引顺序其实部分决定了Alpha混合的顺序，所以值得特别注意！
//这里，无需担心光晕贴图和反射贴图会发生混合错误，因为前者永远是最后一个贴图
if (mbi.texturetype[i] == 2 || mbi.texturetype[i] == 4)
{
int count = (mm.txtoffset[i + 1] - mm.txtoffset[i]) / 3;
if (count != 0)
{
device.DrawPrimitives(PrimitiveType.TriangleList, mm.txtoffset[i], count);
}
}
}
//画其他东西之前，先把Alpha混合关了!
device.RenderState.AlphaBlendEnable = false;
if (DrawCoordinateAxies)
{
axises.Render(device);
}
}
device.EndScene();
try
{
device.Present();
}
catch (DeviceLostException)
{
deviceLost = true;
}
}
