/// <summary>
/// 设置渲染缓冲区的视口尺寸和其他属性。
/// 渲染是双缓冲的。当调用 present() 方法时，后台缓冲区与可见的前台缓冲区交换。
/// 缓冲区的最小大小为 32 x 32 像素。
/// 配置缓冲区是一个缓慢的操作。在正常渲染操作期间，请避免更改缓冲区大小或属性。
///
/// </summary>
public void configureBackBuffer(int width, int height, IRenderTargetAdapter renderBufferAdapter)
{
if (width < 32 || height < 32 || width % 2 != 0 || height % 2 != 0)
{
throw new ArgumentException("缓冲区的最小大小为 32 x 32 像素,并且必须是偶数");
}
this.programConstants = new ProgramConstants();
this.quadFragementUnit = new QuadFragementUnit();
this.renderBufferAdapter = renderBufferAdapter;
backBufferWidth = width;
backBufferHeight = height;
backBufferRenderTarget = new RenderTargetBind();
var backbuffer = new ScreenFrameBuffer(width, height, 1, 1);
backBufferRenderTarget.renderTarget = backbuffer;
backBufferRenderTarget.zBuffer = new ZBuffer(backbuffer.rt_width, backbuffer.rt_height);
currentRenderTarget = backBufferRenderTarget;
needclearflag = true;
_culling = Context3DTriangleFace.NONE;
_depthtest_depthMask = true;
_depthtest_passCompareMode = Context3DCompareMode.ALWAYS;
samplers = new Sampler[8];
for (int i = 0; i < samplers.Length; i++)
{
samplers[i] = new Sampler();
}
if (backbuffer.rt_width == width && backbuffer.rt_height == height)
{
DebugBuffer = new debugger.FrameDebugBuffer(width, height);
}
else
{
DebugBuffer = null;
}
}
/// <summary>
/// 设置三角形剔除模式。
/// 可基于其相对于视图平面的方向，提前在呈现管道流程中从场景中排除三角形。如模型外部所示，一致地指定顶点顺序（顺时针或逆时针）以正确剔除。
/// </summary>
/// <param name="triangleFaceToCull"></param>
public void setCulling(Context3DTriangleFace triangleFaceToCull)
{
_culling = triangleFaceToCull;
}
