void OnPreRender()
{
if (!IsActive)
{
OnDisable();
return;
}
if (GL.wireframe)
{
OnDisable();
return;
}
if (Instance == null)
{
OnEnable();
}
XRHelpers.Update(_camera);
XRHelpers.UpdatePassIndex(ref s_xrPassIndex);
OnPreRenderOceanMask();
OnPreRenderUnderwaterEffect();
_firstRender = false;
}
void OnPreRenderUnderwaterEffect()
{
// Ensure legacy underwater fog is disabled.
if (_firstRender)
{
OceanRenderer.Instance.OceanMaterial.DisableKeyword("_OLD_UNDERWATER");
}
RenderTextureDescriptor descriptor = XRHelpers.GetRenderTextureDescriptor(_camera);
descriptor.useDynamicScale = _camera.allowDynamicResolution;
// Format must be correct for CopyTexture to work. Hopefully this is good enough.
if (_camera.allowHDR)
{
descriptor.colorFormat = RenderTextureFormat.DefaultHDR;
}
var temporaryColorBuffer = RenderTexture.GetTemporary(descriptor);
UpdatePostProcessMaterial(
_camera,
_underwaterEffectMaterial,
_sphericalHarmonicsData,
_meniscus,
_firstRender || _copyOceanMaterialParamsEachFrame,
_debug._viewOceanMask,
// horizonSafetyMarginMultiplier is added to the horizon, so no-op is zero.
_useHorizonSafetyMarginMultiplier ? _horizonSafetyMarginMultiplier : 0f,
// farPlaneMultiplier is multiplied to the far plane, so no-op is one.
_useHorizonSafetyMarginMultiplier ? 1f : _farPlaneMultiplier,
_filterOceanData,
s_xrPassIndex
);
_underwaterEffectCommandBuffer.Clear();
if (_camera.allowMSAA)
{
// Use blit if MSAA is active because transparents were not included with CopyTexture.
// Not sure if we need an MSAA resolve? Not sure how to do that...
_underwaterEffectCommandBuffer.Blit(BuiltinRenderTextureType.CameraTarget, temporaryColorBuffer);
}
else
{
// Copy the frame buffer as we cannot read/write at the same time. If it causes problems, replace with Blit.
_underwaterEffectCommandBuffer.CopyTexture(BuiltinRenderTextureType.CameraTarget, temporaryColorBuffer);
}
_underwaterEffectMaterial.SetTexture(sp_CrestCameraColorTexture, temporaryColorBuffer);
_underwaterEffectCommandBuffer.SetRenderTarget(BuiltinRenderTextureType.CameraTarget, 0, CubemapFace.Unknown, -1);
_underwaterEffectCommandBuffer.DrawProcedural(Matrix4x4.identity, _underwaterEffectMaterial.material, -1, MeshTopology.Triangles, 3, 1);
RenderTexture.ReleaseTemporary(temporaryColorBuffer);
}
void OnPreRenderOceanMask()
{
RenderTextureDescriptor descriptor = XRHelpers.GetRenderTextureDescriptor(_camera);
descriptor.useDynamicScale = _camera.allowDynamicResolution;
InitialiseMaskTextures(descriptor, ref _maskTexture, ref _depthTexture);
_oceanMaskCommandBuffer.Clear();
// Passing -1 to depth slice binds all slices. Important for XR SPI to work in both eyes.
_oceanMaskCommandBuffer.SetRenderTarget(_maskTexture.colorBuffer, _depthTexture.depthBuffer, mipLevel: 0, CubemapFace.Unknown, depthSlice: -1);
_oceanMaskCommandBuffer.ClearRenderTarget(true, true, Color.white * UNDERWATER_MASK_NO_MASK);
_oceanMaskCommandBuffer.SetGlobalTexture(sp_CrestOceanMaskTexture, _maskTexture.colorBuffer);
_oceanMaskCommandBuffer.SetGlobalTexture(sp_CrestOceanMaskDepthTexture, _depthTexture.depthBuffer);
PopulateOceanMask(
_oceanMaskCommandBuffer,
_camera,
OceanRenderer.Instance.Tiles,
_cameraFrustumPlanes,
_oceanMaskMaterial.material,
_debug._disableOceanMask
);
}
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();
}
}