圆周运动

 贝塞尔曲线路径运动

 蓝图函数库创建贝塞尔曲线点

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "MyBlueprintFunctionLibrary.generated.h"/*** */
UCLASS()
class CARTEST_API UMyBlueprintFunctionLibrary : public UBlueprintFunctionLibrary
{GENERATED_BODY()public:UFUNCTION(BlueprintCallable, Category = "BezierCurve")static TArray<FVector> GenerateBezierCurvePoints(const FVector& P0, const FVector& P1, const FVector& P2, int32 NumPoints);};

// Fill out your copyright notice in the Description page of Project Settings.#include "MyBlueprintFunctionLibrary.h"TArray<FVector> UMyBlueprintFunctionLibrary::GenerateBezierCurvePoints(const FVector& P0, const FVector& P1,const FVector& P2, int32 NumPoints)
{TArray<FVector> CurvePoints;// 确保 NumPoints 大于 1，否则没有足够的点来生成曲线if (NumPoints < 2) {UE_LOG(LogTemp, Warning, TEXT("NumPoints 必须大于 1"));return CurvePoints;}// 创建临时点数组用于曲线生成TArray<FVector> TempPoints;for (int32 i = 0; i < NumPoints; i++){float t = static_cast<float>(i) / (NumPoints - 1);FVector Point = FMath::Lerp(FMath::Lerp(P0, P1, t), FMath::Lerp(P1, P2, t), t);TempPoints.Add(Point);}// 计算曲线总长度和各段长度float TotalLength = 0.0f;TArray<float> SegmentLengths;for (int32 i = 1; i < TempPoints.Num(); i++){float SegmentLength = FVector::Dist(TempPoints[i - 1], TempPoints[i]);SegmentLengths.Add(SegmentLength);TotalLength += SegmentLength;}// 防止 TotalLength 为 0if (TotalLength <= KINDA_SMALL_NUMBER){UE_LOG(LogTemp, Warning, TEXT("曲线总长度为 0"));CurvePoints.Add(P0); // 添加起点CurvePoints.Add(P2); // 添加终点return CurvePoints;}// 计算等距点CurvePoints.Add(P0); // 起点float SegmentTarget = TotalLength / (NumPoints - 1);float DistanceAccumulated = 0.0f;for (int32 i = 1; i < TempPoints.Num(); i++){DistanceAccumulated += SegmentLengths[i - 1];while (DistanceAccumulated >= SegmentTarget){float LerpAlpha = (SegmentTarget - (DistanceAccumulated - SegmentLengths[i - 1])) / SegmentLengths[i - 1];FVector Point = FMath::Lerp(TempPoints[i - 1], TempPoints[i], LerpAlpha);CurvePoints.Add(Point);DistanceAccumulated -= SegmentTarget;}}CurvePoints.Add(P2); // 终点return CurvePoints;
}