Water Meshes

• UWaterSubsystem

  • Handles all the intersections and such through FWaterBodyManager

• AWaterZoneActor

  • Actor that holds the meshes

  • Adds all the new actors and uses them to separate the rendering into the transition pieces and such

  • A big volume covering the level

• UWaterMeshComponent

  • UWaterMeshComponent::PostEditComponentMove

    • Marks the mesh as needs rebuild (bNeedsRebuild) via the AWaterZoneActor Owner of this component

  • UWaterMeshComponent::Update: Gets called on tick by the UWaterSubsystem

    • If bNeedsRebuild, calls UWaterMeshComponent::RebuildWaterMesh

  • UWaterMeshComponent::RebuildWaterMesh

    • Builds the geometry for this water mesh component

    • Gets the Dynamic Material Instance from the Water Body (UWaterBodyComponent::CreateOrUpdateWaterMID)

      • Also calls UWaterBodyComponent::SetDynamicParametersOnMID which sets global values from the UWaterSubsystem and UWaterBodyComponent and AWaterZone

      • Also gets the River to Lake and River to Ocean Transition Material Instances from the Water Body Component (which are again Dynamic Material Instances)

    • Uses a HActor as a hit proxy for the mesh in the viewport

    • Water Body Component also stores collision components

      • River: SplineMeshComponents

    • FWaterQuadTree stores the mesh data

• FWaterMeshSceneProxy

  • The primitive that is drawn in the scene

  • Created by the WaterMeshComponent

• TWaterVertexFactory

  • Constucts and handles the RHI data including the vertex buffer

• FWaterMeshVertexBuffer

  • Vertex buffer for drawing the water mesh

• TWaterInstanceDataBuffers

  • Collection of vertex buffers used by the factory