Worldmaker Implementations

Overview

Two concrete implementations of UCAbstractWorldmaker are provided. Both follow the same pipeline but differ in the mesh component type used for rendering.

UCWorldmaker_ProceduralMesh

Uses UProceduralMeshComponent for tile rendering. Vertices, triangles, normals, UVs and vertex colors are computed manually and passed to CreateMeshSection_LinearColor.

Name	Description
isFirstStart	Returns true if `proceduralMeshComponentMap` is empty
cleanPmc	Clears mesh sections, unregisters and destroys the component
calculatePoint	Computes LOD, vertex count, vertex positions, triangles, normals, UVs and vertex colors for a tile
createPMC_sync	Creates `UProceduralMeshComponent` instances, calls `CreateMeshSection_LinearColor`, applies material and collision
debug	Swaps material to debug material on all components

// UCWorldmaker_ProceduralMesh builds mesh data arrays manually:
// - Vertices with Z from innerZCalculate
// - Triangles as quad indices
// - Normals via cross product (if calculateNormal is true)
// - UVs mapped to tile local space
// - Vertex colors from innerZCalculate

// Set worldMakerClass to UCWorldmaker_ProceduralMesh in FCWorldMakerStruct.

UCWorldmaker_DynamicMesh

Uses UDynamicMeshComponent (Geometry Script) for tile rendering. Leverages UGeometryScriptLibrary to append a rectangle primitive, then edits vertices in-place via EditMesh with ParallelFor.

Name	Description
isFirstStart	Returns true if `dynamicMeshComponentMap` is empty
cleanPmc	Resets the dynamic mesh, unregisters and destroys the component
calculatePoint	Computes LOD, vertex count, cell size and transform for a tile
createPMC_sync	Creates `UCdryxDynamicMeshComponent` instances, appends rectangle, edits vertices in parallel, recomputes normals
debug	Swaps material to debug material on all components

// UCWorldmaker_DynamicMesh uses Geometry Script functions:
// 1. AppendRectangleXY to create the base grid
// 2. EditMesh with ParallelFor to set Z and vertex colors per vertex
// 3. RecomputeNormals for correct lighting
// 4. FNavigationSystem::UpdateComponentData for navmesh support

// Set worldMakerClass to UCWorldmaker_DynamicMesh in FCWorldMakerStruct.

Comparison

Aspect	ProceduralMesh	DynamicMesh
Component type	`UProceduralMeshComponent`	`UDynamicMeshComponent`
Mesh construction	Manual arrays (vertices, triangles, normals, UVs)	Geometry Script primitives + in-place edit
Normal computation	Manual cross product per quad	`RecomputeNormals` (Geometry Script)
Navigation update	Automatic	Requires explicit `FNavigationSystem::UpdateComponentData`
Dependencies	`ProceduralMeshComponent` module	`GeometryFramework`, `GeometryCore`, `GeometryScriptingCore` modules