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Starting FPTL VR work 

WIP...
/vr_fptl_sandbox
robbiesri 8 年前
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0e031b45
共有 1 个文件被更改，包括 138 次插入 和 35 次删除
  1. 173
      Assets/ScriptableRenderPipeline/fptl/FptlLighting.cs

173
Assets/ScriptableRenderPipeline/fptl/FptlLighting.cs
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using System;
using System.Collections.Generic;
using UnityEngine.VR;
namespace UnityEngine.Experimental.Rendering.Fptl
{
public class FptlLightingInstance : RenderPipeline

public bool enableReflectionProbeDebug = false;
public bool enableComputeLightEvaluation = false;
const bool k_UseDepthBuffer = true;// // only has an impact when EnableClustered is true (requires a depth-prepass)
const bool k_UseAsyncCompute = true; // should not use on mobile
//const bool k_UseAsyncCompute = true; // should not use on mobile
const bool k_UseAsyncCompute = false; // Easier for ordering for Stereo prototype
const int k_Log2NumClusters = 6; // accepted range is from 0 to 6. NumClusters is 1<<g_iLog2NumClusters
const int k_Log2NumClusters = 6; // accepted range is from 0 to 6. NumClusters is 1<<g_iLog2NumClusters
const float k_ClustLogBase = 1.02f; // each slice 2% bigger than the previous
float m_ClustScale;
private static ComputeBuffer s_PerVoxelLightLists;

private static int s_WidthOnRecord;
private static int s_HeightOnRecord;
private static bool s_stereoDoublewideOnRecord = false;
Matrix4x4[] m_MatWorldToShadow = new Matrix4x4[k_MaxLights * k_MaxShadowmapPerLights];
Vector4[] m_DirShadowSplitSpheres = new Vector4[k_MaxDirectionalSplit];

private Texture2D m_LightAttentuationTexture;
private int m_shadowBufferID;
// VR state bits
private bool stereoActive;
private bool stereoSinglePass;
private bool stereoDoublewide;
private RenderTextureDesc cachedStereoDesc;
public void Cleanup()
{
if (m_DeferredMaterial) DestroyImmediate(m_DeferredMaterial);

m_shadowBufferID = Shader.PropertyToID("g_tShadowBuffer");
}
static void SetupGBuffer(int width, int height, CommandBuffer cmd)
{
//static void SetupGBuffer(int width, int height, CommandBuffer cmd)
static void SetupGBuffer(RenderTextureDesc baseDesc, CommandBuffer cmd)
{
var format10 = RenderTextureFormat.ARGB32;
if (SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.ARGB2101010))
format10 = RenderTextureFormat.ARGB2101010;

// so we make it think we always render in HDR
cmd.EnableShaderKeyword ("UNITY_HDR_ON");
//@TODO: GetGraphicsCaps().buggyMRTSRGBWriteFlag
cmd.GetTemporaryRT(s_GBufferAlbedo, width, height, 0, FilterMode.Point, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Default);
cmd.GetTemporaryRT(s_GBufferSpecRough, width, height, 0, FilterMode.Point, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Default);
cmd.GetTemporaryRT(s_GBufferNormal, width, height, 0, FilterMode.Point, format10, RenderTextureReadWrite.Linear);
cmd.GetTemporaryRT(s_GBufferEmission, width, height, 0, FilterMode.Point, formatHDR, RenderTextureReadWrite.Linear);
cmd.GetTemporaryRT(s_GBufferZ, width, height, 24, FilterMode.Point, RenderTextureFormat.Depth);
cmd.GetTemporaryRT(s_CameraDepthTexture, width, height, 24, FilterMode.Point, RenderTextureFormat.Depth);
cmd.GetTemporaryRT(s_CameraTarget, width, height, 0, FilterMode.Point, formatHDR, RenderTextureReadWrite.Default, 1, true); // rtv/uav
var colorMRTs = new RenderTargetIdentifier[4] { s_GBufferAlbedo, s_GBufferSpecRough, s_GBufferNormal, s_GBufferEmission };
//@TODO: GetGraphicsCaps().buggyMRTSRGBWriteFlag
//cmd.GetTemporaryRT(s_GBufferAlbedo, width, height, 0, FilterMode.Point, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Default);
//cmd.GetTemporaryRT(s_GBufferSpecRough, width, height, 0, FilterMode.Point, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Default);
//cmd.GetTemporaryRT(s_GBufferNormal, width, height, 0, FilterMode.Point, format10, RenderTextureReadWrite.Linear);
//cmd.GetTemporaryRT(s_GBufferEmission, width, height, 0, FilterMode.Point, formatHDR, RenderTextureReadWrite.Linear);
//cmd.GetTemporaryRT(s_GBufferZ, width, height, 24, FilterMode.Point, RenderTextureFormat.Depth);
//cmd.GetTemporaryRT(s_CameraDepthTexture, width, height, 24, FilterMode.Point, RenderTextureFormat.Depth);
//cmd.GetTemporaryRT(s_CameraTarget, width, height, 0, FilterMode.Point, formatHDR, RenderTextureReadWrite.Default, 1, true); // rtv/uav
// finish this...
RenderTextureDesc modDesc = baseDesc;
modDesc.depthBufferBits = 0;
modDesc.colorFormat = RenderTextureFormat.ARGB32;
modDesc.flags &= RenderTextureCreationFlags.SRGB; // fix this...turn off the SRGB flag
cmd.GetTemporaryRT()
var colorMRTs = new RenderTargetIdentifier[4] { s_GBufferAlbedo, s_GBufferSpecRough, s_GBufferNormal, s_GBufferEmission };
cmd.SetRenderTarget(colorMRTs, new RenderTargetIdentifier(s_GBufferZ));
cmd.ClearRenderTarget(true, true, new Color(0, 0, 0, 0));

static void RenderGBuffer(CullResults cull, Camera camera, ScriptableRenderContext loop)
static void RenderGBuffer(CullResults cull, Camera camera, ScriptableRenderContext loop, bool stereoDw, RenderTextureDesc stereoDesc)
SetupGBuffer(camera.pixelWidth, camera.pixelHeight, cmd);
if (stereoDw)
{
//SetupGBuffer(stereoDesc.width, stereoDesc.height, cmd);
SetupGBuffer(stereoDesc, cmd);
}
else
{
//SetupGBuffer(camera.pixelWidth, camera.pixelHeight, cmd);
RenderTextureDesc baseDesc = new RenderTextureDesc(camera.pixelWidth, camera.pixelHeight);
SetupGBuffer(baseDesc, cmd);
}
loop.ExecuteCommandBuffer(cmd);
cmd.Dispose();

cmd.Dispose();
}
void CheckVRState()
{
stereoActive = VRSettings.isDeviceActive;
if (stereoActive)
{
cachedStereoDesc = VRDevice.GetVREyeTextureDesc();
stereoDoublewide = (cachedStereoDesc.dimension == TextureDimension.Tex2D);
}
else
{
stereoDoublewide = false;
}
}
var w = camera.pixelWidth;
var h = camera.pixelHeight;
CheckVRState();
int w, h;
if (stereoDoublewide)
{
w = cachedStereoDesc.width;
h = cachedStereoDesc.height;
}
else
{
w = camera.pixelWidth;
h = camera.pixelHeight;
}
ResizeIfNecessary(w, h);
if (stereoDoublewide)
{
// VR - with double wide, our texture is double eye width
// That is the width we want to use for the light list generation...
ResizeIfNecessary(w/2, h, true);
}
else
{
ResizeIfNecessary(w, h, false);
}
// do anything we need to do upon a new frame.
NewFrame ();

#pragma warning restore 162
// generate g-buffer before shadows to leverage async compute
// forward opaques just write to depth.
loop.SetupCameraProperties(camera);
RenderGBuffer(cullResults, camera, loop);
if (stereoActive)
{
loop.StereoSetupCameraProperties(camera);
loop.StartMultiEye(camera);
}
else
{
loop.SetupCameraProperties(camera);
}
RenderGBuffer(cullResults, camera, loop, stereoDoublewide, cachedStereoDesc);
// camera to screen matrix (and it's inverse)
var proj = CameraProjection(camera);
if (stereoActive)
{
loop.StopMultiEye(camera);
}
// camera to screen matrix (and it's inverse)
var proj = CameraProjection(camera);
var temp = new Matrix4x4();
temp.SetRow(0, new Vector4(0.5f * w, 0.0f, 0.0f, 0.5f * w));
temp.SetRow(1, new Vector4(0.0f, 0.5f * h, 0.0f, 0.5f * h));

var numDirLights = UpdateDirectionalLights(camera, cullResults.visibleLights);
PushGlobalParams(camera, loop, CameraToWorld(camera), projscr, invProjscr, numDirLights);
// do deferred lighting
DoTiledDeferredLighting(camera, loop, numLights, numDirLights);
if (stereoActive)
{
loop.StartMultiEye(camera);
}
// do deferred lighting
DoTiledDeferredLighting(camera, loop, numLights, numDirLights);
// render opaques using tiled forward
RenderForward(cullResults, camera, loop, true); // opaques only (requires a depth pre-pass)

loop.ExecuteCommandBuffer(cmd);
cmd.Dispose();
}
loop.Submit();
if (stereoActive)
{
loop.StopMultiEye(camera);
loop.StereoEndRender(camera);
}
loop.Submit();
}

UpdateShadowConstants (cullResults.visibleLights, ref shadows);
}
void ResizeIfNecessary(int curWidth, int curHeight)
void ResizeIfNecessary(int curWidth, int curHeight, bool stereoDW)
if (curWidth != s_WidthOnRecord || curHeight != s_HeightOnRecord || s_LightList == null ||
if (curWidth != s_WidthOnRecord || curHeight != s_HeightOnRecord || stereoDW != s_stereoDoublewideOnRecord || s_LightList == null ||
AllocResolutionDependentBuffers(curWidth, curHeight);
if (stereoDW)
{
AllocResolutionDependentBuffers(curWidth, curHeight, 2);
}
else
{
AllocResolutionDependentBuffers(curWidth, curHeight, 1);
}
}
s_stereoDoublewideOnRecord = stereoDW;
}
}
void ReleaseResolutionDependentBuffers()

return 8 * (1 << k_Log2NumClusters); // total footprint for all layers of the tile (measured in light index entries)
}
void AllocResolutionDependentBuffers(int width, int height)
void AllocResolutionDependentBuffers(int width, int height, int stereoMultiplier)
{
var nrTilesX = (width + 15) / 16;
var nrTilesY = (height + 15) / 16;

s_LightList = new ComputeBuffer(LightDefinitions.NR_LIGHT_MODELS * dwordsPerTile * nrTiles, sizeof(uint)); // enough list memory for a 4k x 4k display
//s_LightList = new ComputeBuffer(LightDefinitions.NR_LIGHT_MODELS * dwordsPerTile * nrTiles, sizeof(uint)); // enough list memory for a 4k x 4k display
s_LightList = new ComputeBuffer(LightDefinitions.NR_LIGHT_MODELS * dwordsPerTile * nrTiles * stereoMultiplier, sizeof(uint)); // enough list memory for a 4k x 4k display
if (enableClustered)
if (enableClustered)
// VR TODO - No stereo support yet...
var tileSizeClust = LightDefinitions.TILE_SIZE_CLUSTERED;
var nrTilesClustX = (width + (tileSizeClust-1)) / tileSizeClust;
var nrTilesClustY = (height + (tileSizeClust-1)) / tileSizeClust;

var nrBigTilesX = (width + 63) / 64;
var nrBigTilesY = (height + 63) / 64;
var nrBigTiles = nrBigTilesX * nrBigTilesY;
s_BigTileLightList = new ComputeBuffer(LightDefinitions.MAX_NR_BIGTILE_LIGHTS_PLUSONE * nrBigTiles, sizeof(uint));
}
//s_BigTileLightList = new ComputeBuffer(LightDefinitions.MAX_NR_BIGTILE_LIGHTS_PLUSONE * nrBigTiles, sizeof(uint));
s_BigTileLightList = new ComputeBuffer(LightDefinitions.MAX_NR_BIGTILE_LIGHTS_PLUSONE * nrBigTiles * stereoMultiplier, sizeof(uint));
}
}
void VoxelLightListGeneration(CommandBuffer cmd, Camera camera, int numLights, Matrix4x4 projscr, Matrix4x4 invProjscr)

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