Hair - bug fix of changing the method by which passes are acquired (#5015)

Signed-off-by: Adi-Amazon <barlev@amazon.com>
Signed-off-by: Adi-Amazon <82479970+Adi-Amazon@users.noreply.github.com>

Co-authored-by: Adi-Amazon <barlev@amazon.com>

Gems/AtomTressFX/Code/Rendering/HairFeatureProcessor.cpp

@@ -311,17 +311,17 @@ namespace AZ
                 m_forceClearRenderData = true;
             }
 
-            bool HairFeatureProcessor::HasHairParentPass()
+            bool HairFeatureProcessor::HasHairParentPass(RPI::RenderPipeline* renderPipeline)
             {
-                RPI::PassFilter passFilter = RPI::PassFilter::CreateWithPassName(HairParentPassName, GetParentScene());
+                RPI::PassFilter passFilter = RPI::PassFilter::CreateWithPassName(HairParentPassName, renderPipeline);
                 RPI::Pass* pass = RPI::PassSystemInterface::Get()->FindFirstPass(passFilter);
-                return pass;
+                return pass ? true : false;
             }
 
             void HairFeatureProcessor::OnRenderPipelineAdded(RPI::RenderPipelinePtr renderPipeline)
             {
                 // Proceed only if this is the main pipeline that contains the parent pass
-                if (!HasHairParentPass())
+                if (!HasHairParentPass(renderPipeline.get()))
                 {
                     return;
                 }
@@ -335,7 +335,7 @@ namespace AZ
             void HairFeatureProcessor::OnRenderPipelineRemoved([[maybe_unused]] RPI::RenderPipeline* renderPipeline)
             {
                 // Proceed only if this is the main pipeline that contains the parent pass
-                if (!HasHairParentPass())
+                if (!HasHairParentPass(renderPipeline))
                 {
                     return;
                 }
@@ -347,7 +347,7 @@ namespace AZ
             void HairFeatureProcessor::OnRenderPipelinePassesChanged(RPI::RenderPipeline* renderPipeline)
             {
                 // Proceed only if this is the main pipeline that contains the parent pass
-                if (!HasHairParentPass())
+                if (!HasHairParentPass(renderPipeline))
                 {
                     return;
                 }
@@ -623,3 +623,4 @@ namespace AZ
         } // namespace Hair
     } // namespace Render
 } // namespace AZ
+

Gems/AtomTressFX/Code/Rendering/HairFeatureProcessor.h

@@ -165,7 +165,7 @@ namespace AZ
 
                 void EnablePasses(bool enable);
 
-                bool HasHairParentPass();
+                bool HasHairParentPass(RPI::RenderPipeline* renderPipeline);
 
                 //! The following will serve to register the FP in the Thumbnail system
                 AZStd::vector<AZStd::string> m_hairFeatureProcessorRegistryName;