private void LateUpdate()
{
#if UNITY_EDITOR
// We don't run in "prefab scenes", i.e. when editing a prefab. Bail out if prefab scene is detected.
if (PrefabStageUtility.GetCurrentPrefabStage() != null)
{
return;
}
#endif
if (OceanRenderer.Instance == null || !ShowEffect())
{
_rend.enabled = false;
return;
}
// Pass true in last arg for a crap reason - in edit mode LateUpdate can be called very frequently, and the height sampler mistakenly thinks
// this is erroneous and complains.
_sampleWaterHeight.Init(transform.position, 0f, true);
_sampleWaterHeight.Sample(out var waterHeight);
float heightOffset = transform.position.y - waterHeight;
// Disable skirt when camera not close to water. In the first few frames collision may not be avail, in that case no choice
// but to assume enabled. In the future this could detect if camera is far enough under water, render a simple quad to avoid
// finding the intersection line.
_rend.enabled = heightOffset < _maxHeightAboveWater;
if (_rend.enabled)
{
// Only execute when playing to stop CopyPropertiesFromMaterial from corrupting and breaking the material.
if (!isMeniscus && _copyParamsEachFrame)
{
_rend.material.CopyPropertiesFromMaterial(OceanRenderer.Instance.OceanMaterial);
}
// Assign lod0 shape - trivial but bound every frame because lod transform comes from here
if (_mpb == null)
{
_mpb = new PropertyWrapperMPB();
}
_rend.GetPropertyBlock(_mpb.materialPropertyBlock);
// Underwater rendering uses displacements for intersecting the waves with the near plane, and ocean depth/shadows for ScatterColour()
_mpb.SetInt(LodDataMgr.sp_LD_SliceIndex, 0);
LodDataMgrAnimWaves.Bind(_mpb);
LodDataMgrSeaFloorDepth.Bind(_mpb);
LodDataMgrShadow.Bind(_mpb);
_mpb.SetFloat(sp_HeightOffset, heightOffset);
_rend.SetPropertyBlock(_mpb.materialPropertyBlock);
}
}
internal static void UpdatePostProcessMaterial(
RenderTexture source,
Camera camera,
PropertyWrapperMaterial underwaterPostProcessMaterialWrapper,
UnderwaterSphericalHarmonicsData sphericalHarmonicsData,
bool isMeniscusEnabled,
bool copyParamsFromOceanMaterial,
bool debugViewPostProcessMask,
float horizonSafetyMarginMultiplier,
float farPlaneMultiplier,
int dataSliceOffset
)
{
Material underwaterPostProcessMaterial = underwaterPostProcessMaterialWrapper.material;
if (copyParamsFromOceanMaterial)
{
// Measured this at approx 0.05ms on dell laptop
underwaterPostProcessMaterial.CopyPropertiesFromMaterial(OceanRenderer.Instance.OceanMaterial);
}
// Enable/Disable meniscus.
if (isMeniscusEnabled)
{
underwaterPostProcessMaterial.EnableKeyword("CREST_MENISCUS");
}
else
{
underwaterPostProcessMaterial.DisableKeyword("CREST_MENISCUS");
}
// Enabling/disabling keywords each frame don't seem to have large measurable overhead
if (debugViewPostProcessMask)
{
underwaterPostProcessMaterial.EnableKeyword(DEBUG_VIEW_OCEAN_MASK);
}
else
{
underwaterPostProcessMaterial.DisableKeyword(DEBUG_VIEW_OCEAN_MASK);
}
underwaterPostProcessMaterial.SetFloat(LodDataMgr.sp_LD_SliceIndex, 0);
underwaterPostProcessMaterial.SetVector(sp_InstanceData, new Vector4(OceanRenderer.Instance.ViewerAltitudeLevelAlpha, 0f, 0f, OceanRenderer.Instance.CurrentLodCount));
LodDataMgrAnimWaves.Bind(underwaterPostProcessMaterialWrapper);
LodDataMgrSeaFloorDepth.Bind(underwaterPostProcessMaterialWrapper);
LodDataMgrShadow.Bind(underwaterPostProcessMaterialWrapper);
float seaLevel = OceanRenderer.Instance.SeaLevel;
{
// We only apply the horizon safety margin multiplier to horizon if and only if
// concrete height of the camera relative to the water and the height of the camera
// relative to the sea-level are the same. This ensures that in incredibly turbulent
// water - if in doubt - use the neutral horizon.
float seaLevelHeightDifference = camera.transform.position.y - seaLevel;
if (seaLevelHeightDifference >= 0.0f ^ OceanRenderer.Instance.ViewerHeightAboveWater >= 0.0f)
{
horizonSafetyMarginMultiplier = 0.0f;
}
}
{
underwaterPostProcessMaterial.SetFloat(sp_OceanHeight, seaLevel);
underwaterPostProcessMaterial.SetInt(sp_DataSliceOffset, dataSliceOffset);
float maxOceanVerticalDisplacement = OceanRenderer.Instance.MaxVertDisplacement * 0.5f;
float cameraYPosition = camera.transform.position.y;
float nearPlaneFrustumWorldHeight;
{
float current = camera.ViewportToWorldPoint(new Vector3(0f, 0f, camera.nearClipPlane)).y;
float maxY = current, minY = current;
current = camera.ViewportToWorldPoint(new Vector3(0f, 1f, camera.nearClipPlane)).y;
maxY = Mathf.Max(maxY, current);
minY = Mathf.Min(minY, current);
current = camera.ViewportToWorldPoint(new Vector3(1f, 0f, camera.nearClipPlane)).y;
maxY = Mathf.Max(maxY, current);
minY = Mathf.Min(minY, current);
current = camera.ViewportToWorldPoint(new Vector3(1f, 1f, camera.nearClipPlane)).y;
maxY = Mathf.Max(maxY, current);
minY = Mathf.Min(minY, current);
nearPlaneFrustumWorldHeight = maxY - minY;
}
// We don't both setting the horizon value if we know we are going to be having to apply the post-processing
// effect full-screen anyway.
bool forceFullShader = (cameraYPosition + nearPlaneFrustumWorldHeight + maxOceanVerticalDisplacement) <= seaLevel;
underwaterPostProcessMaterial.SetFloat(sp_OceanHeight, seaLevel);
if (forceFullShader)
{
underwaterPostProcessMaterial.EnableKeyword(FULL_SCREEN_EFFECT);
}
else
{
underwaterPostProcessMaterial.DisableKeyword(FULL_SCREEN_EFFECT);
}
}
// Have to set these explicitly as the built-in transforms aren't in world-space for the blit function
if (XRHelpers.IsSinglePass)
{
XRHelpers.SetViewProjectionMatrices(camera);
Matrix4x4 cameraProjectionMatrix = camera.projectionMatrix;
camera.projectionMatrix = XRHelpers.LeftEyeProjectionMatrix;
var inverseViewProjectionMatrix = (XRHelpers.LeftEyeProjectionMatrix * camera.worldToCameraMatrix).inverse;
underwaterPostProcessMaterial.SetMatrix(sp_InvViewProjection, inverseViewProjectionMatrix);
{
GetHorizonPosNormal(camera, Camera.MonoOrStereoscopicEye.Left, seaLevel, horizonSafetyMarginMultiplier, farPlaneMultiplier, out Vector2 pos, out Vector2 normal);
underwaterPostProcessMaterial.SetVector(sp_HorizonPosNormal, new Vector4(pos.x, pos.y, normal.x, normal.y));
}
camera.projectionMatrix = XRHelpers.RightEyeProjectionMatrix;
var inverseViewProjectionMatrixRightEye = (XRHelpers.RightEyeProjectionMatrix * camera.worldToCameraMatrix).inverse;
underwaterPostProcessMaterial.SetMatrix(sp_InvViewProjectionRight, inverseViewProjectionMatrixRightEye);
{
GetHorizonPosNormal(camera, Camera.MonoOrStereoscopicEye.Right, seaLevel, horizonSafetyMarginMultiplier, farPlaneMultiplier, out Vector2 pos, out Vector2 normal);
underwaterPostProcessMaterial.SetVector(sp_HorizonPosNormalRight, new Vector4(pos.x, pos.y, normal.x, normal.y));
}
// Revert to original matrix. Not sure if we need to do this.
camera.projectionMatrix = cameraProjectionMatrix;
}
else
{
if (XRHelpers.IsNewSDKRunning)
{
XRHelpers.SetViewProjectionMatrices(camera);
}
var inverseViewProjectionMatrix = (camera.projectionMatrix * camera.worldToCameraMatrix).inverse;
underwaterPostProcessMaterial.SetMatrix(sp_InvViewProjection, inverseViewProjectionMatrix);
{
GetHorizonPosNormal(camera, Camera.MonoOrStereoscopicEye.Mono, seaLevel, horizonSafetyMarginMultiplier, farPlaneMultiplier, out Vector2 pos, out Vector2 normal);
underwaterPostProcessMaterial.SetVector(sp_HorizonPosNormal, new Vector4(pos.x, pos.y, normal.x, normal.y));
}
}
// Not sure why we need to do this - blit should set it...?
underwaterPostProcessMaterial.SetTexture(sp_MainTex, source);
// Compute ambient lighting SH
{
// We could pass in a renderer which would prime this lookup. However it doesnt make sense to use an existing render
// at different position, as this would then thrash it and negate the priming functionality. We could create a dummy invis GO
// with a dummy Renderer which might be enoguh, but this is hacky enough that we'll wait for it to become a problem
// rather than add a pre-emptive hack.
UnityEngine.Profiling.Profiler.BeginSample("Underwater sample spherical harmonics");
LightProbes.GetInterpolatedProbe(OceanRenderer.Instance.ViewCamera.transform.position, null, out SphericalHarmonicsL2 sphericalHarmonicsL2);
sphericalHarmonicsL2.Evaluate(sphericalHarmonicsData._shDirections, sphericalHarmonicsData._ambientLighting);
underwaterPostProcessMaterial.SetVector(sp_AmbientLighting, sphericalHarmonicsData._ambientLighting[0]);
UnityEngine.Profiling.Profiler.EndSample();
}
}
