/// <summary>
/// 检测回读请求状态
/// </summary>
private void UpdateRequest()
{
UpdateStat.BeginFrame();
bool complete = false;
while (m_ReadbackRequests.Count > 0)
{
var req = m_ReadbackRequests.Peek();
if (req.hasError)
{
ReadbackStat.EndRequest(req, false);
m_ReadbackRequests.Dequeue();
}
else if (req.done)
{
// 更新数据并分发事件
m_ReadbackTexture.GetRawTextureData <Color32>().CopyFrom(req.GetData <Color32>());
complete = true;
ReadbackStat.EndRequest(req, true);
m_ReadbackRequests.Dequeue();
}
else
{
break;
}
}
if (complete)
{
UpdateStat.EndFrame();
OnFeedbackReadComplete?.Invoke(m_ReadbackTexture);
UpdateDebugTexture();
}
}
private void OnPreCull()
{
//CHECK FOR REQUESTS LIST AND UPDATE TEXTURE FROM LAST FRAME
bool complete = false;
if (TargetTexture != null)
{
var width = TargetTexture.width;
var height = TargetTexture.height;
if (m_ReadbackTexture == null || m_ReadbackTexture.width != width || m_ReadbackTexture.height != height)
{
m_ReadbackTexture = new Texture2D(width, height, TextureFormat.RGBA32, false);
m_ReadbackTexture.filterMode = FilterMode.Point;
m_ReadbackTexture.wrapMode = TextureWrapMode.Clamp;
}
if (!pageTable.InCoroutine)
{
if (SystemInfo.supportsAsyncGPUReadback)
{
while (m_ReadbackRequests.Count > 0)
{
var req = m_ReadbackRequests.Peek();
if (req.hasError)
{
m_ReadbackRequests.Dequeue();
}
else if (req.done)
{
m_ReadbackTexture.GetRawTextureData <Color32>().CopyFrom(req.GetData <Color32>());
complete = true;
m_ReadbackRequests.Dequeue();
}
else
{
break;
}
}
if (complete)
{
OnFeedbackReadComplete?.Invoke(m_ReadbackTexture);
}
}
else
{
RenderTexture.active = TargetTexture;
Rect rectReadPicture = new Rect(0, 0, width, height);
m_ReadbackTexture.ReadPixels(rectReadPicture, 0, 0);
OnFeedbackReadComplete?.Invoke(m_ReadbackTexture);
}
}
}
//NEW FRAME CONFIGURATION
var mainCamera = Camera.main;
if (mainCamera == null)
{
return;
}
if (TargetTexture == null)
{
TargetTexture = new RenderTexture(mainCamera.pixelWidth / 12, mainCamera.pixelHeight / 12, 24);
TargetTexture.useMipMap = false;
TargetTexture.wrapMode = TextureWrapMode.Clamp;
TargetTexture.filterMode = FilterMode.Point;
m_FeedbackCamera.targetTexture = TargetTexture;
Vector3 terrainSize = DemoTerrain.terrainData.size;
Vector3 terrainTransform = DemoTerrain.GetPosition();
Shader.SetGlobalVector("_TERRAINPOS", terrainTransform);
Shader.SetGlobalVector("_TERRAINSIZE", terrainSize);
float feedbackBias = (float)Mathf.Floor(Mathf.Log((float)TargetTexture.width / (float)Mathf.Max((float)mainCamera.pixelWidth, (float)mainCamera.pixelHeight), 2.0f));
Shader.SetGlobalFloat("_FEEDBACKBIAS", feedbackBias);
}
m_FeedbackCamera.targetTexture = TargetTexture;
m_FeedbackCamera.transform.position = mainCamera.transform.position;
m_FeedbackCamera.transform.rotation = mainCamera.transform.rotation;
m_FeedbackCamera.cullingMask = mainCamera.cullingMask;
m_FeedbackCamera.projectionMatrix = mainCamera.projectionMatrix;
m_FeedbackCamera.fieldOfView = mainCamera.fieldOfView;
m_FeedbackCamera.nearClipPlane = mainCamera.nearClipPlane;
m_FeedbackCamera.farClipPlane = mainCamera.farClipPlane;
m_FeedbackCamera.SetReplacementShader(m_FeedbackShader, "VirtualTextureType");
}