memo.cpp

#include "ProceduralMeshComponent.h"
 
// Creating a standard root object.
AMyActor::AMyActor()
{
	mesh = CreateDefaultSubobject<UProceduralMeshComponent>(TEXT("GeneratedMesh"));
	RootComponent = mesh;
	/**
	*	Create/replace a section for this procedural mesh component.
	*	@param	SectionIndex		Index of the section to create or replace.
	*	@param	Vertices			Vertex buffer of all vertex positions to use for this mesh section.
	*	@param	Triangles			Index buffer indicating which vertices make up each triangle. Length must be a multiple of 3.
	*	@param	Normals				Optional array of normal vectors for each vertex. If supplied, must be same length as Vertices array.
	*	@param	UV0					Optional array of texture co-ordinates for each vertex. If supplied, must be same length as Vertices array.
	*	@param	VertexColors		Optional array of colors for each vertex. If supplied, must be same length as Vertices array.
	*	@param	Tangents			Optional array of tangent vector for each vertex. If supplied, must be same length as Vertices array.
	*	@param	bCreateCollision	Indicates whether collision should be created for this section. This adds significant cost.
	*/
	//UFUNCTION(BlueprintCallable, Category = "Components|ProceduralMesh", meta = (AutoCreateRefTerm = "Normals,UV0,VertexColors,Tangents"))
	//	void CreateMeshSection(int32 SectionIndex, const TArray<FVector>& Vertices, const TArray<int32>& Triangles, const TArray<FVector>& Normals,
	// const TArray<FVector2D>& UV0, const TArray<FColor>& VertexColors, const TArray<FProcMeshTangent>& Tangents, bool bCreateCollision);
 
	TArray<FVector> vertices;
 
	vertices.Add(FVector(0, 0, 0));
	vertices.Add(FVector(0, 100, 0));
	vertices.Add(FVector(0, 0, 100));
 
	TArray<int32> Triangles;
	Triangles.Add(0);
	Triangles.Add(1);
	Triangles.Add(2);
 
	TArray<FVector> normals;
	normals.Add(FVector(1, 0, 0));
	normals.Add(FVector(1, 0, 0));
	normals.Add(FVector(1, 0, 0));
 
	TArray<FVector2D> UV0;
	UV0.Add(FVector2D(0, 0));
	UV0.Add(FVector2D(10, 0));
	UV0.Add(FVector2D(0, 10));
 
	TArray<FLinearColor> vertexColors;
	vertexColors.Add(FLinearColor(0.75, 0.75, 0.75, 1.0));
	vertexColors.Add(FLinearColor(0.75, 0.75, 0.75, 1.0));
	vertexColors.Add(FLinearColor(0.75, 0.75, 0.75, 1.0));
 
	TArray<FProcMeshTangent> tangents;
	tangents.Add(FProcMeshTangent(0, 1, 0));
	tangents.Add(FProcMeshTangent(0, 1, 0));
	tangents.Add(FProcMeshTangent(0, 1, 0));
 
	mesh->CreateMeshSection_LinearColor(1, vertices, Triangles, normals, UV0, vertexColors, tangents, false);
}