Fix incorrect directional light shadows influence on secondary render views

#1758

Source/Engine/Renderer/Renderer.cpp

@@ -343,6 +343,7 @@ void RenderInner(SceneRenderTask* task, RenderContext& renderContext, RenderCont
     // Prepare
     renderContext.View.Prepare(renderContext);
     renderContext.Buffers->Prepare();
+    ShadowsPass::Instance()->Prepare();
 
     // Build batch of render contexts (main view and shadow projections)
     {

Source/Engine/Renderer/ShadowsPass.cpp

@@ -549,10 +549,17 @@ void ShadowsPass::Dispose()
     SAFE_DELETE_GPU_RESOURCE(_shadowMapCube);
 }
 
+void ShadowsPass::Prepare()
+{
+    // Clear cached data
+    _shadowData.Clear();
+    LastDirLightIndex = -1;
+    LastDirLightShadowMap = nullptr;
+}
+
 void ShadowsPass::SetupShadows(RenderContext& renderContext, RenderContextBatch& renderContextBatch)
 {
     PROFILE_CPU();
-    _shadowData.Clear();
     auto& view = renderContext.View;
 
     // Update shadow map

Source/Engine/Renderer/ShadowsPass.h

@@ -94,6 +94,8 @@ public:
     LightShadowData LastDirLight;
 
 public:
+    void Prepare();
+
     /// <summary>
     /// Setups the shadows rendering for batched scene drawing. Checks which lights will cast a shadow.
     /// </summary>