void Start()
{
screenWidth = Screen.width;
screenHeight = Screen.height;
cameraTarget = new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear);
GBufferTextures = new RenderTexture[]
{
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear)
};
depthTexture = new RenderTexture(Screen.width, Screen.height, 24, RenderTextureFormat.Depth, RenderTextureReadWrite.Linear);
GBuffers = new RenderBuffer[GBufferTextures.Length];
for (int i = 0; i < GBuffers.Length; ++i)
{
GBuffers[i] = GBufferTextures[i].colorBuffer;
}
gbufferIDs = new int[]
{
Shader.PropertyToID("_GBuffer0"),
Shader.PropertyToID("_GBuffer1"),
Shader.PropertyToID("_GBuffer2"),
Shader.PropertyToID("_GBuffer3"),
};
SortMesh.InitSortMesh(allRenderObjects.Length);
CullMesh.allObjects = allRenderObjects;
foreach (var i in allRenderObjects)
{
i.Init();
}
}
// Start is called before the first frame update
void Start()
{
cameraRT = new RenderTexture(Screen.width, Screen.height, 24);
GBufferTextures = new RenderTexture[]
{
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
};
//深度贴图？
depthTexture = new RenderTexture(Screen.width, Screen.height, 24, RenderTextureFormat.Depth, RenderTextureReadWrite.Linear);
GBuffers = new RenderBuffer[GBufferTextures.Length];
for (int i = 0; i < GBuffers.Length; i++)
{
GBuffers[i] = GBufferTextures[i].colorBuffer;
}
//这就是纹理id把
GBufferIDs = new int[]
{
Shader.PropertyToID("_GBuffer0"),
Shader.PropertyToID("_GBuffer1"),
Shader.PropertyToID("_GBuffer2"),
Shader.PropertyToID("_GBuffer3")
};
SortMesh.InitSortMesh(renderObjects.Length);
CullMesh.renderObjects = renderObjects;
foreach (var i in renderObjects)
{
i.Init();
}
}
private void OnPostRender()
{
Camera cam = Camera.current;
//调整屏幕大小以满足超采样
if (screenHeight != cam.pixelHeight * superSample || screenWidth != cam.pixelWidth * superSample)
{
screenHeight = (int)(cam.pixelHeight * superSample);
screenWidth = (int)(cam.pixelWidth * superSample);
ReSize(cameraTarget, screenWidth, screenHeight);
ReSize(depthTexture, screenWidth, screenHeight);
foreach (var i in GBufferTextures)
{
ReSize(i, screenWidth, screenHeight);
}
for (int i = 0; i < GBuffers.Length; i++)
{
GBuffers[i] = GBufferTextures[i].colorBuffer;
}
}
Shader.SetGlobalTexture(_DepthTexture, depthTexture);
//计算每帧的投影矩阵，依靠投影矩阵计算视锥裁面
Matrix4x4 proj = GL.GetGPUProjectionMatrix(cam.projectionMatrix, false);
Matrix4x4 vp = proj * cam.worldToCameraMatrix;
Matrix4x4 invvp = vp.inverse;
Shader.SetGlobalMatrix(_InvVP, invvp);
CullMesh.UpdateFrame(cam, ref invvp, transform.position);
SortMesh.UpdateFrame();
JobHandle cullHandle = CullMesh.Schedule();
JobHandle sortHandle = SortMesh.Schedule(cullHandle);
JobHandle.ScheduleBatchedJobs();//使用Job System的调用在分线程中完成剔除和排序
for (int i = 0; i < gbufferIDs.Length; i++)
{
Shader.SetGlobalTexture(gbufferIDs[i], GBufferTextures[i]);
}
Graphics.SetRenderTarget(GBuffers, depthTexture.depthBuffer);
GL.Clear(true, true, Color.black);
//start draw call
deferredMaterial.SetPass(0);
sortHandle.Complete();
for (int i = 0; i < SortMesh.sortObj.Length; i++)//遍历每个obj的Mesh进行输出
{
DrawElements(ref SortMesh.sortObj[i]);
}
lighting.DrawLight(GBufferTextures, gbufferIDs, cameraTarget, cam);
skyDraw.SkyBoxDraw(cam, cameraTarget.colorBuffer, depthTexture.depthBuffer);
//end draw call
Graphics.Blit(cameraTarget, cam.targetTexture);
}
private void OnPostRender()
{
Camera cam = Camera.current;
if (screenHeight != cam.pixelHeight * superSample || screenWidth != cam.pixelWidth * superSample)
{
screenHeight = (int)(cam.pixelHeight * superSample);
screenWidth = (int)(cam.pixelWidth * superSample);
ReSize(cameraTarget, screenWidth, screenHeight);
ReSize(depthTexture, screenWidth, screenHeight);
foreach (var i in GBufferTextures)
{
ReSize(i, screenWidth, screenHeight);
}
for (int i = 0; i < GBuffers.Length; ++i)
{
GBuffers[i] = GBufferTextures[i].colorBuffer;
}
}
Shader.SetGlobalTexture(_DepthTexture, depthTexture);
Matrix4x4 proj = GL.GetGPUProjectionMatrix(cam.projectionMatrix, false);
Matrix4x4 vp = proj * cam.worldToCameraMatrix;
Matrix4x4 invvp = vp.inverse;
Shader.SetGlobalMatrix(_InvVP, invvp);
CullMesh.UpdateFrame(cam, ref invvp, transform.position);
SortMesh.UpdateFrame();
JobHandle cullhandle = CullMesh.Schedule();
JobHandle sortHandle = SortMesh.Schedule(cullhandle);
JobHandle.ScheduleBatchedJobs();
for (int i = 0; i < gbufferIDs.Length; ++i)
{
Shader.SetGlobalTexture(gbufferIDs[i], GBufferTextures[i]);
}
Graphics.SetRenderTarget(GBuffers, depthTexture.depthBuffer);
GL.Clear(true, true, Color.black);
//Start Draw Mesh
deferredMaterial.SetPass(0);
sortHandle.Complete();
for (int i = 0; i < SortMesh.sorts.Length; ++i)
{
DrawElements(ref SortMesh.sorts[i]);
}
lighting.DrawLight(GBufferTextures, gbufferIDs, cameraTarget, cam);
//End Deferred Lighting
skyDraw.DrawSkybox(cam, cameraTarget.colorBuffer, depthTexture.depthBuffer);
Graphics.Blit(cameraTarget, cam.targetTexture);
}
void Start()
{
screenWidth = Screen.width;
screenHeight = Screen.height;
//定制了3块RT，第一块是CameraTarget，也就是光照计算后的结果
//第二块是四个贴图，GBuffer，在Shader中输出这四个值
//第三块是depthTexture用来处理深度问题
cameraTarget = new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear);
GBufferTextures = new[]
{
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear),
};
depthTexture = new RenderTexture(Screen.width, Screen.height, 24, RenderTextureFormat.Depth, RenderTextureReadWrite.Linear);
GBuffers = new RenderBuffer[GBufferTextures.Length];
for (int i = 0; i < GBuffers.Length; i++)
{
GBuffers[i] = GBufferTextures[i].colorBuffer;
}
gbufferIDs = new[]
{
Shader.PropertyToID("_GBuffer0"),
Shader.PropertyToID("_GBuffer1"),
Shader.PropertyToID("_GBuffer2"),
Shader.PropertyToID("_GBuffer3"),
};
//把所有的Obj进行排序和剔除
SortMesh.InitSortMesh(allRenderObjs.Length);
CullMesh.allObjects = allRenderObjs;
//单例初始化
foreach (var i in allRenderObjs)
{
i.Init();
}
}
public static JobHandle Schedule(JobHandle cull)
{
SortMesh instance = new SortMesh();
return(instance.Schedule(LayerCount, 1, cull));
}
public static JobHandle Schedule(JobHandle cull)
{
SortMesh instance = new SortMesh();
return(instance.Schedule <SortMesh>(LAYERCOUNT, 1, cull));
}