keywords: [UE4]用DrawDebugLine绘制矩形

自己实现的用DrawDebugLine绘制矩形的函数：

/* Draw rectangle use line
    @CenterLoc, location of rectangle center
    @Rot, rotation of rectangle
    @Angle, angle of diagonal
    @DiagonalHalve, half of diagonal lenght.
*/
void DrawDebugTrangle(const FVector& CenterLoc, const FRotator& Rot, float Angle, float DiagonalHalve)
{
    FVector Point1 = CenterLoc + (Rot + FRotator(0.f, Angle, 0.f)).Vector() * DiagonalHalve;
    FVector Point2 = CenterLoc + (Rot + FRotator(0.f, 90.f + (90.f - Angle), 0.f)).Vector() * DiagonalHalve;
    FVector Point3 = CenterLoc + (Rot + FRotator(0.f, -90.f - (90.f - Angle), 0.f)).Vector() * DiagonalHalve;
    FVector Point4 = CenterLoc + (Rot + FRotator(0.f, -Angle, 0.f)).Vector() * DiagonalHalve;

    DrawDebugLine(MyGameMode->GetWorld(), Point1, Point2, FColor::Green);
    DrawDebugLine(MyGameMode->GetWorld(), Point2, Point3, FColor::Green);
    DrawDebugLine(MyGameMode->GetWorld(), Point3, Point4, FColor::Green);
    DrawDebugLine(MyGameMode->GetWorld(), Point4, Point1, FColor::Green);
}